This study aims to create a high-speed, low-power data transmission solution for implantable medical devices based on cutting-edge FinFET technology. The work examines the application of Binary Phase Shift Keying (BPSK) modulation through a transmission gate design, which provides an optimal blend of low resistance, high-speed performance, and minimal power consumption. Additionally, the work includes the design of a sine-to-square wave converter and a modulating signal generator. FinFET is employed owing to its high switching speed, low power consumption, low leakage current, and excellent tolerance of short channel effects. The design exhibits a steady electric field at the source end, a high electrostatic potential, and an improved ON current at low work function values using Sentaurus TCAD simulations of a 20nm FinFET, allowing high-speed data modulation in smart implants. A nonoverlapping phase generator, a low-power, current-starved gated ring oscillator, a frequency divider utilizing a True Single Phase Clock D-Flip-flop, and an XOR gate serving as a pulse counter are all featured in the design of the BPSK demodulator. This work is significant for its ability to drastically reduce power consumption to 1.75μW while retaining high data transmission speeds, making it perfect for next-generation implantable medical devices. With a 0.9 V power supply, this FinFET-based BPSK modulator and demodulator achieve a far lower power consumption than conventional CMOS-based designs, which increases device longevity and efficiency in settings with limited resources.

Background: Screen time has become an inevitable aspect of daily life due to increased technological access and changes in the social and economic landscapes. The increase in screen time is associated with the development of various health conditions. Contextually, research on screen time and its health impact has been studied widely. Therefore, the present study tried to understand the trends and themes in the global research on screen time and its associated health aspects. Methods: We adopted a bibliometric review, and the data were extracted from the SCOPUS database, limiting it to 2012-2023 (n =4077). The final number of studies considered for the analysis was 2919 after applying the inclusion and exclusion criteria. Results: Scientific production has increased over the years on this topic, with few consistent contributors (Tremblay MS, Chaput JP, and Carson V) and sources from Western countries leading the production in this domain. In addition, from the results of thematic network mapping, we identified the basic yet underdeveloped topics in screen time and health research, namely obesity, risk factors to health, and mental health. A good proportion of the studies involve children and adolescents as participants, indicating the growing trend of studying screen time risk factors for these age groups' health. Conclusion: It was evident from the result that the earlier works have focused on screen time as a risk to health and well-being. However, its role in specific health conditions is underdeveloped. Further, the case of adolescents and children being a widely studied age group suggests the implications for their health and mental health.

Advancements in battery-free electronics, Internet ofThings integration,and sustainable technologies have driven the need for eco-friendly,self-powered systems. Triboelectric nanogenerators (TENG) have emergedas lightweight, low-cost, and flexible with simple structures andenvironmentally friendly characteristics. These flexible devices canharvest a wide range of mechanical energy from the environment intoelectrical energy, making them a promising solution for sustainabledevelopment. Electrospun nanofiber-based TENG offers significant advantagesin self-powered, flexible, and wearable electronics due to its uniquematerial properties. This review highlights the role of micro/nanostructuredsurface morphology in influencing the electrical characteristics ofself-powered systems. It also presents a brief review of recent advancementsin nanofiber-based self-powered wearables and other electronics. Furthermore,this review provides insights into strategies for enhancing the outputperformance of TENG, contributing to the future of battery-free self-poweredelectronics.

The development of porous materials with extended cage-like architectures remains a central challenge in chemistry and materials science. Zeolitic tetrazolate frameworks (ZTFs) represent an emerging class of metal-organic frameworks (MOFs) constructed from tetrazolate linkers and transition metal ions. Their topological and porous architectures can be systematically tuned by employing diverse tetrazolate building units. Structurally, ZTFs share similarities with zeolitic imidazolate frameworks (ZIFs), yet the substitution of imidazoles with tetrazolates introduces uncoordinated nitrogen sites. These sites promote unique coordination modes and stronger framework-guest interactions, thereby imparting superior functional properties compared to their ZIF counterparts. Experimental studies demonstrate that ZTFs with uncoordinated nitrogen atoms exhibit remarkable performance in gas adsorption, separation, energy harvesting, and sensing. To the best of our knowledge, this perspective represents the first comprehensive account of ZTFs, encompassing synthetic strategies, structural diversity, coordination chemistry, and emerging applications. Furthermore, we discuss in detail the unique characteristics that distinguish ZTFs from other porous materials and highlight future opportunities for their advancement in materials chemistry.

A bone scaffold is used to treat critical size bone defects and demands contradictory physical and mechanical properties. It is difficult to achieve the desirable properties using a single material, and composite materials are used to develop the scaffolds. A combination of bioceramics such as hydroxyapatite (HAP), calcium silicate (CS), or calcium phosphate (CP) with different percentages of multiwalled carbon nanotubes (MWCNT) is used to develop the scaffolds using Robocasting 3D printing to treat the cancellous bone defects. The bioceramics will enhance the biocompatibility and bone regeneration of the scaffold while the MWCNT will improve the mechanical properties. Compressive strength, density, shrinkage, and porosity are selected as deciding factors, and the analytic hierarchy process (AHP) and technique for order of preference by similarity to ideal solution (TOPSIS) are used to identify the best composite materials for the required properties. The scaffolds are printed and sintered and observed that CS with 1 mass % of MWCNT sintered at 1200°C, HAP with 0.5 mass % of MWCNT sintered at 1100°C, and CP with 0.5 mass % of MWCNT sintered at 1200°C are the best bone scaffold options. The ideal processing parameters for developing bioceramic bone scaffolds using the robocasting technique are identified and reported.