Materials Science Research Articles

All-Visible-Light-Activated Diarylethene Photoswitches

Photochromic compounds have attracted much attention for their potential applications in photo-actuators, optoelectronic devices and optical recording techniques. This interest is driven by their key photochemical and photophysical properties, which can be reversibly modulated by light irradiation. Among them, diarylethene compounds have garnered extensive investigation due to their excellent thermal stability of both open- and closed-form isomers, robust fatigue resistance, high photocyclization quantum yield and good photochromic performance in both solution and solid phases. However, a notable limitation in expanding the utility of diarylethene compounds is the necessity for ultraviolet light to induce their photochromism. This requirement poses challenges, as ultraviolet light can be detrimental to biological tissues, and its penetration is often restricted in various media. This review provides an overview of design strategies employed in the development of visible-light-responsive diarylethene compounds. These design strategies serve as a guideline for molecular design, with the potential to significantly broaden the applications of all-visible-light-activated diarylethene compounds in the realms of materials science and biomedical science.

A Review on Advances and Challenges in Core-Shell Scaffolds for Bone Tissue Engineering: Design, Fabrication, and Clinical Translation.

This review explores core-shell scaffolds in bone tissue engineering, highlighting their osteoconductive and osteoinductive properties critical for bone growth and regeneration. Key design factors include material selection, porosity, mechanical strength, biodegradation kinetics, and bioactivity. Electrospun core-shell nanofibrous scaffolds demonstrate potential in delivering therapeutic agents and enhancing bone regeneration. Critical characterization techniques include structural, surface, chemical composition, mechanical, and degradation analyses. Scaling up production poses challenges, addressed by innovative electrospinning techniques. Future research focuses on regulatory and commercial considerations, while exploring advanced materials and fabrication methods to optimize scaffold performance for improved clinical outcomes.

Boosting Hydrogen Transport in Mixed Matrix Membranes Through Continuous Spillover Via Pd‐Functionalized MOF Gel Networks

AbstractMembrane‐based gas separation offers notable energy efficiency benefits for hydrogen purification, yet it is often hindered by the inherent trade‐off between permeability and selectivity. To address this challenge, a novel mixed matrix membrane (MMM) design is presented to boost H2 separation performance via continuous hydrogen spillover mechanisms for the first time. The MMM incorporates a palladium‐functionalized ZIF‐67 gel (Pd@ZIF‐67 gel) network into a polymer of intrinsic microporosity (PIM‐1) matrix. The ZIF‐67 gel network serves as a uniform dispersion medium for palladium nanoparticles (Pd NPs), thereby generating a multitude of active sites. These exposed sites, in conjunction with the microporous structure of ZIF‐67, facilitate hydrogen dissociation and establish a continuous hydrogen spillover pathway throughout the membrane. This synergistic MMM design leads to substantial improvements in both hydrogen transport and selectivity. At an optimal loading of 28 wt% Pd@ZIF‐67 gel, the MMMs exhibit a H2 permeability of 3620 Barrer and a remarkable 417% enhancement in H2/CH4 selectivity (24.9), surpassing the 2008 upper bound. This approach paves the way for the development of advanced materials tailored for gas separation applications.

Education, propaganda, and visual discourse in socialist Romania (1948–1989)

ABSTRACT The official discourse during the communist regime in Romania (1948–1989) has not been paid much attention by researchers and the official visual discourse, addressing adults and children, even less so. My study aims to address this research gap and identify the identity markers of the Romanian territory during socialism by exploring spatial representations and the territorial identity that were produced through official visual imagery. Using qualitative discourse analysis and critical visual methodology, I analyse the visual construction, through discourse, of themes and places created starting with the 1950s and were featured repeatedly during the 1970s and 1980s Romania (the period of national communism), and which constructed and highlighted traits of the country’s territorial identity. To achieve the research aim, I explore three types of research materials and ways of realising spatial education and socialisation through (propaganda) images or a visual pedagogy of space: (1) photographs in three textbooks about the Geography of Romania – a tool in educating people’s representations of their homeland, (2) official (state-produced and distributed) picture postcards reflecting progress during socialist Romania, and (3) comics about work and class identities in Cutezătorii [The Daring Ones] youth magazine – a tool in the edutainment of Romanian communist pioneers. These three official visual discourses were part of a coherent cultural visual discourse about the socialist nation, pervading representations about Romania, about its urban area, and about who the Romanians were meant to have been. This plural discourse was constructed through the visual intertextuality of these three widely distributed media.

Assessment of Classical Force-Fields for Graphene Mechanics

The unique properties of graphene have attracted the interest of researchers from various fields, and the discovery of graphene has sparked a revolution in materials science, specifically in the field of two-dimensional materials. However, graphene synthesis’s costly and complex process significantly impairs researchers’ endeavors to explore its properties and structure experimentally. Molecular dynamics simulation is a well-established and useful tool for investigating graphene’s atomic structure and dynamic behavior at the nanoscale without requiring expensive and complex experiments. The accuracy of the molecular dynamics simulation depends on the potential functions. This work assesses the performance of various potential functions available for graphene in mechanical properties prediction. The following two cases are considered: pristine graphene and pre-cracked graphene. The most popular fifteen potentials have been assessed. Our results suggest that diverse potentials are suitable for various applications. REBO and Tersoff potentials are the best for simulating monolayer pristine graphene, and the MEAM and the AIREBO-m potentials are recommended for those with crack defects because of their respective utilization of the electron density and inclusion of the long-range interaction. We recommend the AIREBO-m potential for a general case of classical molecular dynamics study. This work might help to guide the selection of potentials for graphene simulations and the development of further advanced interatomic potentials.

Comparative Sensitivity Analysis in Composite Material Selection: Evaluating OAT and COMSAM Methods in Multi-criteria Decision-making

The decision-making process is critical across various fields, influencing essential aspects like performance, safety, and sustainability. In engineering and materials science, selecting suitable materials is a complex process involving multiple interdependent criteria, which impact the reliability and lifecycle of a design. Traditional sensitivity analysis methods, such as the one-at-a-time (OAT) approach, assess the effects of individual parameter changes but often fail to capture the cumulative impact of simultaneous modifications. It can limit the effectiveness of decision tools in real-world scenarios where multiple factors vary concurrently. This study utilizes the Comprehensive Sensitivity Analysis Method (COMSAM) to address limitations in traditional sensitivity analysis by modeling simultaneous parameter adjustments across multiple criteria. Specifically, the study aims to validate COMSAM’s effectiveness in the practical problem of composite material selection, comparing it with the traditional OAT approach within a multi-criteria decision-making (MCDM) framework. By integrating both sensitivity analysis techniques with the Characteristic Objects Method (COMET), this research ensures robust evaluation and mitigates vulnerabilities like the rank reversal paradox. The findings demonstrate that COMSAM provides enhanced insights into the impact of parameter interdependencies, offering a more resilient foundation for decision-making in high-stakes environments where material properties and performance are paramount.

Navigating the digital frontier: transforming endodontic diagnosis through digitization. part 1

The current advances and innovations in material technology and armamentaria help to negate the difficulties faced by clinicians in diagnosing and treating patients. Oral healthcare contributes much to the wellbeing of a person. However, the oral cavity is a small and difficult area in which to work since it is filled with vascularized mobile tissues and various shaped teeth, and connected to sinuses, nerve canals, lungs and the gastrointestinal tract via the trachea and pharynx. Moreover, each tooth has a complex root canal system that must be explored if it is infected or inflamed. Root canal treatment can be compared to entering a blind tunnel and treating something unseen. Endodontics is a field in dentistry where a clinician must use their tactile sense and correlate it with clinical knowledge, as well as skill, to treat dental infections. Digital evolution has simplified diagnosis, treatment planning, documentation and communication with patients, rendering more predictable outcomes and providing evidence for the healing or non-healing of disease. The evolution of digital radiography has offered us the best technology available. The present review discusses various helpful digital tools that are currently available, and future technologies that may guide clinicians in better diagnosis. CPD/Clinical Relevance: Advances in diagnostic tools have improved accuracy in identifying and treating dental pathologies, thereby achieving more predictable outcomes and enhancing patient care.

Effects of In Ovo Taurine Injection on Embryo Development, Antioxidant Status, and Bioactive Peptide Content in Chicken Embryos (Gallus gallus domesticus)

Stress in birds disrupts the homeostasis of the organism, leading to an inability to neutralize reactive oxygen species. Taurine, an effective antioxidant, affects various cellular mechanisms, including cation modulation, protein phosphorylation, and cell proliferation. The aim of the study was to evaluate the effect of colloid with taurine applied in ovo to Albumin on embryonic development, oxidative stress indicators and the content of bioactive peptides—carnosine and anserine—in the pectoral muscle. The research materials were eggs of the parent flock (Ross 308) divided into four groups (K (without injection), T50-concentration of taurine hydrocolloid 50 ppm (mg/L); T100-colloid concentration 100 ppm (mg/L) taurine; T500-colloid concentration of 500 ppm (mg/L) taurine). The experimental solutions were injected in an amount of 0.3 mL into egg white. Eggs were incubated under standard incubation conditions. The addition of 100 and 500 ppm taurine had a highly significant (p = 0.001) effect on the plasma antioxidant potential in chicks. The level of anserine increased with increasing concentrations of taurine. These changes were highly significant (p = 0.007). The level of anserine in the T2 and T3 groups was determined to be 2.5 times higher than in the pectoral muscles of embryos not treated with taurine colloid. An analysis of the results showed that the administration of an increased dose of hydrocolloid with taurine increased the content of carnosine and anserine in the pectoral muscle. Colloid with taurine applied in ovo to chicken white egg reduces oxidative stress and increases homeostasis of the organism.

Atomically resolved imaging of the conformations and adsorption geometries of individual β-cyclodextrins with non-contact AFM

Glycans, consisting of covalently linked sugar units, are a major class of biopolymers essential to all known living organisms. To better understand their biological functions and further applications in fields from biomedicine to materials science, detailed knowledge of their structure is essential. However, due to the extraordinary complexity and conformational flexibility of glycans, state-of-the-art glycan analysis methods often fail to provide structural information with atomic precision. Here, we combine electrospray deposition in ultra-high vacuum with non-contact atomic force microscopy and theoretical calculations to unravel the structure of β-cyclodextrin, a cyclic glucose oligomer, with atomic-scale detail. Our results, established on the single-molecule level, reveal the different adsorption geometries and conformations of β-cyclodextrin. The position of individual hydroxy groups and the location of the stabilizing intramolecular H-bonds are deduced from atomically resolved images, enabling the unambiguous assignment of the molecular structure and demonstrating the potential of the method for glycan analysis.

Engineering Solutions for Drug Delivery System

This paper examines the evolution of engineering solutions in drug delivery systems, emphasizing the role of nanotechnology in overcoming current challenges in precision medicine. It addresses key challenges in drug delivery, including targeting specificity, minimizing adverse effects, and enhancing the efficiency of drug carriers. Both top-down and bottom-up engineering approaches are examined, with case studies highlighting successful applications in cancer therapy, gene delivery, and implantable devices. The paper also investigates future trends, such as smart and active delivery systems, and discusses the interdisciplinary collaboration required for these advances. By integrating material science, bioengineering, and pharmaceutical technology, this research presents innovative solutions aimed at improving therapeutic efficacy and minimizing toxicity. Keywords: Drug delivery systems, Nanotechnology, Top-down engineering, Bottom-up engineering, Gene therapy, Smart drug delivery.

Photochemical Patterning and Characterization of Mechanical Properties on Soft Materials

AbstractAlthough different chemistries for the spatio‐temporal localization of molecules and gradients of chemical signals within soft materials are now available, the achievement of spatio‐temporal patterns of mechanical properties in such materials and their characterization remain considerable challenges. This study presents the syntheses of two novel photo‐sensitive and thermoresponsive hydrogel systems, a photo‐stiffening and a photo‐softening hydrogel. Their potential for fabricating soft materials with patterned mechanical properties is then demonstrated by fabricating an actuator whose higher‐order bending properties can be switched on with light, and by encoding mechanical properties for digital information encryption and storage. Microindentation and a custom‐made data analysis software are essential for the characterization of all the materials. From a general perspective, this work opens a route to the fabrication of soft materials with patterned mechanical properties, addressing an important emerging challenge in soft materials science with applications in soft robotics and information encryption and storage.

Enhancing Water Lubrication in UHMWPE Using Mesoporous Polydopamine Nanoparticles: A Strategy to Mitigate Frictional Vibration.

Establishing a persistent lubrication mechanism and a durable tribo-film on contact surfaces is identified as crucial for improving the tribology and vibration characteristics of polymer materials under water-lubricated conditions. This study focuses on enhancing tribological performance and reducing frictional vibrations in ultrahigh molecular weight polyethylene (UHMWPE) through the incorporation of mesoporous polydopamine (MPDA) nanoparticles. In the experiments, MPDA nanoparticles were synthesized and blended with UHMWPE to create UHMWPE/MPDA composites. The interactions between these composites and zirconia (ZrO2) ceramic balls under water lubrication were examined. The results show that when the MPDA content of the composite is 1.5 wt %, the coefficient of friction and wear rate are reduced by 40% and 52% compared with those of pure UHMWPE, respectively. This notable enhancement helped to mitigate friction-induced vibrations, particularly those caused by intermittent sticking and slipping motions. MPDA nanoparticles were shown to act as reservoirs for water, releasing and replenishing water based on the loading conditions, which sustained continuous water-based lubrication at the composite surfaces. Additionally, the surface deformation behavior of the composite material is significantly weakened, which provides a more stable friction surface. This work introduces a novel approach to enhance the interface stability of polymers in water-lubricated environments, offering guidance for developing advanced materials and reducing friction and wear in engineering applications.

The Use of Learning Media In PAUD to Develop Children's Cognitive and Socio-Social Abilities

Early childhood is in the golden age so that cognitive and social aspects need to be improved so that the growth and development of children is optimal. The purpose of this study is to determine the type of learning media to improve children's cognitive and social aspects. This research is a descriptive qualitative research method using the library research method or literature research by reviewing written sources. The data source used is 15 journals for 5 years back. The library data collection method is carried out by reading, recording, and analyzing and then concluding the research material. The results showed that the learning process influenced the aspects of cognitive development and socio-social development of children. Media that affect the aspects of children's cognitive development on namely, dominoes, loose parts, traces media, numbers puzzles, uno cards, smart geometry boards, zoolofabets, powerpoint, and media made from natural materials. While the media that affect the aspects of children's socio-social development in the form of animated videos, hand dolls, smart roullete, and snake ladder clogs.

Preface

The 2nd International Symposium on Frontiers of Mechanical and Material Engineering (MME2024) is a globally recognized event to be organized by the Hubei Digital Textile Equipment Key Laboratory, China, in collaboration with the Wuhan Textile University, China, Zhongnan University, East-Siberian State University of Technology and Management, Russia, Rongzhi Sciences and Technology Center, China, was held from 21-22 September 2024 in Hangzhou, China. Since its inception in 2014, MME has successfully encompassed a wide spectrum of cuttingedge research domains, developed into a premier international event held in China and which gathered the best scientists and world class experts to share leading edge and multidisciplinary research in various fields related to mechanical engineering, materials science and modern technologies. MME serves as a prestigious international platform, this conference will continue to facilitate the dissemination of cutting-edge advancements across a spectrum of disciplines, converge students, experts, researchers, scholars, and industry professionals from different nations to share and deliberate on their latest work. This volume comprises select proceedings of 18 papers from 56 contributions submitted to MME2024. All the papers underwent a meticulous peer-review process, with each paper being evaluated by at least one expert in the relevant field. It introduces latest advancements in the subjects of mechanical engineering, materials science and advanced manufacturing technology, et al. It will be beneficial for readers from both academia and industry to understand and tackle the challenges in an efficient manner and to adopt appropriate solutions in the mentioned fields above. We would like to extend our heartfelt gratitude to invited keynote speakers: Dr. Valeriy Buryachenko, Micromechanics & Composites LLC, Cincinnati, Ohio, USA; Prof. David BASSIR, French University of Technology UTBM, France; Prof. Raul Duarte Salgueiral Gomes Campilho, Department of Mechanical Engineering, ISEP - School of Engineering, Portugal, and Dr. Ghulam Yasin, Oxford Brookes University, UK, for their brilliant speeches. Thanks to all the international reviewers and program committee members for their valuable contributions and dedication. List of Conference Chair, Conference Co-Chair, Honorary Chair, Editors and Technical Program Committees are available in this Pdf.

Experimental study on effect of elastic-rigid composite boundary on shockwave from cavitation bubble collapse

Understanding the mechanisms behind the cavitation erosion resistance of elastic materials is the basis for the development of new cavitation erosion resistance materials. This paper employs underwater low-voltage discharge to induce cavitation bubble, combined with high-speed photography, shadowgraph methods, and transient pressure measurement systems to experimentally investigate the evolution and intensity of shockwave from bubble collapse near elastic-rigid composite boundary. Under the condition of constant elastic material thickness, with the bubble–wall distance increasing, shockwave shape evolves from multi-layers to single-layer. The peak pressure of the shockwave shows a trend of decreasing, then increasing, and finally stabilizing with increase in the bubble–wall distance. Furthermore, it was found that the elastic-rigid composite boundary causes the shockwave to reflect twice. As the material thickness increases, the intensity of the first reflected shockwave from the elastic surface decreases initially, then increases, and eventually stabilizes. However, that of the second reflected shockwave decreases. The total energy of the two reflections at the elastic interface is less than 4% of the mechanical energy of the bubble at its maximum volume. Finally, after the energy dissipation by the two reflections and material deformation, the elastic layer substrate withstands over 70% of the total mechanical energy of the cavitation bubble. There is an optimal elastic material thickness to minimize the shockwave load on the elastic layer substrate under the condition that the elastic-rigid composite boundary does not affect the evolution of cavitation bubble shape. These findings are significant for understanding bubble dynamics near elastic-rigid composite boundaries and provide theoretical support for developing cavitation erosion-resistant materials in engineering.

Review of Surface Treatment Technology for Improving Wear Resistance of Magnesium Alloys

Background: As the lightest metal structural material in engineering, magnesium alloy has excellent mechanical properties, such as high specific strength, high specific stiffness, good damping performance, and good machinability. It is widely used in the fields of precision parts, automobiles, aerospace, and military. However, poor friction and wear performance are significant magnesium defects of the alloys, which make its use limited in some areas with high working conditions, so it is essential to improve the wear resistance of the magnesium alloy surface. Objective: The aim of this study was to summarize the technology of improving the wear resistance of magnesium alloy in recent year. The influence of different surface treatment technology for enhancing friction and wear properties was also analyzed, which could provide a reference for related scholars and researchers. Method: In this paper, the literature related to friction and wear properties of magnesium alloys in recent years were reviewed, the principles of various surface treatment technology of magnesium alloys were explained, and the advantages and disadvantages of each technology were analyzed. Results: Based on the literature analyses related to the wear resistance of magnesium alloys, the problems existing in the surface treatment technology for improving the wear resistance of magnesium alloys are summarized, and future development directions are put forward. Conclusion: Among the technologies to improve the wear resistance of magnesium alloys, the combination of various techniques can better meet the working demands. The environmentally friendly and efficient manner has a good prospect for development.

Emerging breakthroughs in membrane filtration techniques and their application in agricultural wastewater treatment: Reusability aspects

Freshwater resources are becoming limited and are rapidly getting polluted due to industrialization and urbanization. Water pollution is a pervasive global challenge both in terms of scarcity and quality. Among other sources, wastewater discharged through agricultural practices are major contributor to environmental pollution. The leading cause of contaminants is the runoff of fertilizers, herbicides, insecticides and animal waste into waterbodies. Conventional treatment methods efficiently remove large particles, organic matter, and nutrients but require extensive infrastructure and produce significant sludge. In contrast, membrane filtration offers superior purification and reuse potential by using semi-permeable membranes to selectively remove contaminants, including suspended solids and dissolved ions. This study examines membrane filtration principles and technologies, emphasizing their role in delivering high-quality effluent for discharge or reuse. The study identifies fertilizers, herbicides, and insecticides as major agricultural contaminants and highlights conventional techniques' ineffectiveness in achieving high purification levels. Membrane filtration effectively remediates a wide range of pollutants, but fouling remains a challenge, addressed by antifouling agents and advanced membrane materials in hybrid processes. The study concludes by highlighting the reusability aspect of membrane filtration in agricultural systems and the potential applications of reclaimed water. This study emphasizes the need for advanced membrane materials and integrated systems for effective utilisation of membrane filtration.

Recent Progress for the Synthesis of Pyrrole Derivatives – An Update

Abstract: Pyrrole is a versatile heterocyclic moiety exhibiting a wide range of pharmacological actions with high therapeutic value. The importance of pyrrole in the pharmaceutical field lies in its versatility, selectivity, and biocompatibility, and these properties make it a valuable tool for drug design and development. The pyrrole moiety is a fundamental building block for many biologically active molecules and has gathered significant attention in the fields of medicinal and organic chemistry; hence, its synthesis has been a crucial area for research. There are various conventional as well as modern approaches to acquiring a series of pyrrole scaffolds, with a wide range of attractive features and drawbacks pertaining to each approach. An extensive amount of literature must be studied to compare the best synthetic routes. This article highlights the applications of pyrrole derivatives in various fields, such as drug discovery, material science, and catalysis, and provides an overview of modern synthetic pathways that include metals, nanomaterials, and complex heterogeneous catalysed methods for pyrrole derivatives. Special emphasis is given to the use of green chemistry principles like green solvent-based methods, microwave-aided methods, and solvent-free methods in the synthesis of pyrroles, with the recent developments and prospects in the synthetic and organic chemistry fields. Overall, this review article provides a comprehensive overview of the synthesis of pyrroles and complies with all the possible developments in the synthetic routes for pyrroles within 2015– 2022. Among all, the reactions catalysed by proline, copper oxides, and oxones have been shown to be the most effective synthetic route for pyrrole derivatives at mild reaction conditions and with excellent yields. This information will be helpful for researchers interested in the development of new pyrrole-based compounds. The categorization in this review provides an easy means for the reader to rationally select the best possible synthetic method for pyrrole derivatives.

Transport-of-intensity differential phase contrast imaging: defying weak object approximation and matched-illumination condition

Quantitative phase imaging (QPI) has emerged as a promising label-free imaging technique with growing importance in biomedical research, optical metrology, materials science, and other fields. Partially coherent illumination provides resolution twice that of the coherent diffraction limit, along with improved robustness and signal-to-noise ratio, making it an increasingly significant area of study in QPI. Partially coherent QPI, represented by differential phase contrast (DPC), linearizes the phase-to-intensity transfer process under the weak object approximation (WOA). However, the nonlinear errors caused by WOA in DPC can lead to phase underestimation. Additionally, DPC requires strict matching of the illumination numerical aperture (NA) to ensure the complete transmission of low-frequency information. This necessitates precise alignment of the optical system and limits the flexible use of objective and illumination. In this study, the applicability of the WOA under different coherence parameters is explored, and a method to defy WOA by reducing the illumination NA is proposed. The proposed method uses the transport-of-intensity equation through an additional defocused intensity image to recover the lost low-frequency information due to illumination mismatch, without requiring any iterative procedure. This method overcomes the limitations of DPC being unable to recover large phase objects and does not require the strict illumination matching conditions. The accurate quantitative morphological characterization of customized artifact and microlens arrays that do not satisfy WOA under non-matched-illumination conditions demonstrated the precise quantitative capability of the proposed method and its excellent performance in the field of measurement. Meanwhile, the phase retrieval of tongue slices and oral epithelial cells demonstrated its application potential in the biomedical field. The ability to accurately recover phase under a concise and implementable optical setup makes it a promising solution for widespread application in various label-free imaging domains.

Comments: Running Hot and Cool for a Power Boost

_ Have data center operators become the major proponents of nuclear power? A flurry of recent announcements suggests so. But three major industry players are leveraging their oil and gas expertise to offer another process to help data center operators run their sites more sustainably—immersion cooling liquids. Nuclear power took top billing in the past 2 months with Amazon and nuclear reactor company X-Energy announcing a collaboration to bring online more than 5 GW of small modular reactors (SMRs) in the US by 2039. Google and Kairos Power will collaborate to deploy 500 MW with SMRs by 2030. Kairos will build them, then sell energy and ancillary services to Google under power purchase agreements (PPA). Microsoft has an eye on the restart of the retired 835-MW Three Mile Island Unit 1 and signed a 20-year PPA with Constellation Energy which owns the plant and plans to finance the work required with the PPA, its largest ever. These early plans could boost the available power supply while lowering carbon emissions, but hurdles remain. The Nuclear Regulatory Commission (NRC) must approve commercial deployment; SMRs are in relatively early stages and regulatory frameworks are evolving; the need for public acceptance; and the NRC comes into play again to regulate the management and disposal of radioactive nuclear waste. In other words, this will not be a speedy solution. Immersion Cooling for Data Centers—Shell, ExxonMobil, and BP Although the practice of liquid cooling isn’t a new concept in the oil and gas industry which uses water, oil, cooling towers, seawater, and engineered liquids to handle heat in various processes and plants, data center operators are exploring the use of a muscle car version—immersion cooling. Immersion cooling is gaining broader attention and consideration. Data Center Frontier called it “ready for its big moment.” The Cleantech Group forecasts that the market for immersion cooling could grow from $270 million to $2.54 billion by 2032. The process entails submerging servers with modified hardware into a bath of nonconductive liquid (e.g., fans are removed, protective coatings are applied, a controlled temperature range of the liquid is maintained) to allow the heat generated by components to be transmitted into the fluid and cooled using either a single-phase or two‑phase method. In the single-phase process, a thermally conductive dielectric liquid is used. It is circulated through immersion tanks, using pumps, to an external heat exchanger, then it is returned to the tanks. The two-phase method is more complicated. The dielectric fluid is one that will change from a liquid to a gas at a relatively low temperature (lower than the operating temperature of the electronic components). Because the immersion fluid has a low boiling point, the boiling causes the fluid to change state, from liquid to gas. This phase change is an efficient method of removing heat due to the vaporization process. As immersion cooling gains traction as a sustainable and efficient alternative to traditional air cooling, major energy companies are stepping in to drive innovation in this technology. Shell, ExxonMobil, and BP, each with their own specialized immersion cooling fluids and collaborative ventures, are helping to advance the commercial adoption of immersion cooling in data centers worldwide. Shell Lubricants joined Green Revolution Cooling (GRC), one of the first companies to develop immersion cooling, as one of the first members in GRC’s ElectroSafe Fluid Partner Partner Program in 2022 and has deployed GRC Immersion Cooling Systems in its Houston data center and with partner Asperitas in a high-performance cluster (HPC) in its Amsterdam facilities. Shell’s single-phase, synthetic immersion fluid is based on its proprietary gas-to-liquids technology. It is conducting pilot programs with Microsoft and Alibaba in China and working with Infosys to create an integrated immersion cooling system. ExxonMobil launched its “portfolio of synthetic and nonsynthetic fluid” last October. In April 2024, the company announced it is working with Intel to develop new liquid cooling technologies for data centers. BP’s lubricant subsidiary, Castrol, is offering a range of single-phase immersion cooling fluids. It is working with Submer on future fluids and has set up a UK test center for potential customers at its headquarters. Castrol joined the Research Institutes of Sweden (RISE) to study thermal management and materials science using RISE’s data center test bed. Immersion cooling may deliver efficiency gains and lower power demand at a lower cost than newbuild nuclear power, but will it be enough? Or is it a stopgap until power generation ramps up? Note: I’m pleased to announce that Trent Jacobs has been promoted to the position of JPT managing editor and will be this column’s new voice starting with our December issue.