Three-dimensional Arrangement Research Articles

Nanoengineering of uniform and monodisperse mesoporous carbon nanospheres mediated by long hydrophilic chains of triblock copolymers

A one-step soft templating strategy for synthesizing uniform and monodisperse mesoporous carbon nanospheres (UM-MCNs) with sub-100 nm size and large mesopores without using any co-solvent additives has not yet been reported. Herein, an extremely simple,effective and environment friendly strategy was first developed to prepare uniform, monodisperse polymer nanospheres (PNs) and UM-MCNs with small particle size (80–90 nm) and large mesopores (~ 6.8 nm), where F108 with long hydrophilic chains not only served as mesopore-forming reagent, but also as a dispersant reagent that facilitated uniform growth of the nanospheres, resulting in a narrow particle size distribution. Moreover, F108 could also act as a stability-driving agent, that is, the phloroglucinol/formaldehyde polymer was tightly “locked” by the long hydrophilic segments of F108 via strong hydrogen bonding. Consequently, intact carbon nanospheres with large mesopores were obtained after carbonization, and finally a three-dimensional periodic arrangement of the UM-MCNs was formed. In addition, ethanol could be used as a co-surfactant or co-solvent during self-assembly. The present strategy may not only supply a novel avenue to synthesize UM-MCNs, but also shed light on insights into the profound impact of F108 with long hydrophilic chains and ethanol on the morphology and pore size of carbon spheres.

3D Printer-Based Encapsulated Origami Electronics for Extreme System Stretchability and High Areal Coverage.

Stretchability and areal coverage of active devices are critical design considerations of stretchable or wearable photovoltaics and photodetections where high areal coverages are required. However, simultaneously maximizing both properties in conventional island-bridge structures through traditional two-dimensional manufacturing processes is difficult due to their inherent trade-offs. Here, a 3D printer-based strategy to achieve extreme system stretchability and high areal coverage through combining fused deposition modeling (FDM) and flexible conductive nanocomposites is reported. Distinguished from typical approaches of using conductive filaments for FDM which have a flexibility dilemma and conductivity trade-offs, the proposed axiomatic approach to embed a two-dimensional silver nanowire percolation network into the surfaces of flexible 3D printed structures offers sufficient conductivity and deformability as well as additional benefits of electrical junction enhancement and encapsulation of silver nanowires. Kirigami/origami-pattern-guided three-dimensional arrangements of encapsulated interconnections provide efficient control over stretchability and areal coverage. The suggested process enables a perovskite solar module with an initial areal coverage of ∼97% to be electrically and mechanically reversible with 400% system stretchability and 25 000% interconnect stretchability under the 1000 cycle test, by folding down or hiding the origami-applied interconnects under the islands. This 3D printing strategy of potentially low cost, large size capabilities, and high speed is promising for highly flexible future energy conversion applications.

Characterization of micelle-templated silica nanotubes and nanotube bundles using tilt-series transmission electron microscopy

Pluronic-surfactant-templated silica and organosilica nanotubes, silica nanotube bundles and silicas with small ordered domains of cylindrical mesopores were characterized by using tilt-series transmission electron microscopy (TEM). In as-synthesized nanotube samples, three-dimensional (3-D) arrangements of long nanotubes, likely involving local cross-linking of nanotube pairs, were uncovered. As-synthesized silica nanotubes tended to be unstable during TEM observation, which appeared to stem from stretching and breaking of nanotubes whose parts belonged to two different nanotube aggregates, the latter undergoing shrinkage under TEM conditions. However, silica nanotubes hydrothermally treated at a sufficiently high temperature and methylene-bridged organosilica nanotubes did not undergo this kind of changes to any appreciable extent. Despite the observed instability of as-synthesized nanotubes, the calcined sample exhibited narrow pore size distribution, suggesting that if a similar degradation occurs during drying and calcination, it may merely fragment the nanotubes. Nanotube bundles were observed to exhibit 3-D structures with often curved bundle segments locally meeting one another and potentially forming loops. A junction within a seemingly continuous nanotube bundle was observed, where ends of two groups of nanotubes met. This feature is likely to have its counterparts in particles of materials with much larger ordered domain sizes. The imaging of a large-pore silica with 2-D hexagonal domains of small size revealed the presence of an impurity consisting of spheres encircled by nanotubes. These results demonstrate that the tilt-series TEM imaging is a powerful method for characterization of not only complicated 3-D morphologies of surfactant-templated materials, but also their softness and possible degradation modes.

Comparing ANSYS Fluent® and OpenFOAM® simulations of Geldart A, B and D bubbling fluidized bed hydrodynamics

PurposeThe purpose of this study is to assess the performance of ANSYS Fluent® and OpenFOAM®, at their current state of development, to study the relevant bubbling fluidized bed (BFB) characteristics with Geldart A, B and D particles.Design/methodology/approachFor typical Geldart B and D particles, both a three-dimensional cylindrical and a pseudo-two-dimensional arrangement were used to measure the bed pressure drop and solids volume fraction, the latter by digital image analysis techniques. For a typical Geldart A particle, specifically to examine bubbling and slugging phenomena, a 2 m high three-dimensional cylindrical arrangement of small internal diameter was used. The hydrodynamics of the experimentally investigated BFB cases were also simulated for identical geometries and operating conditions using OpenFOAM® v6.0 and ANSYS Fluent® v19.2 at identical mesh and numerical setups.FindingsThe comparison between experimental and simulated results showed that both ANSYS Fluent® and OpenFOAM® provide a fair qualitative prediction of the bubble sizes and solids fraction for freely-bubbling Geldart B and D particles. For Geldart A particles, operated in a slugging mode, the qualitative predictions are again quite fair, but numerical values of relevant slug characteristics (length, velocity and frequency) slightly favor the use of OpenFOAM®, despite some deviations of predicted slug velocities.Originality/valueA useful comparison of computational fluid dynamics (CFD) software performance for different fluidized regimes is presented. The results are discussed and recommendations are formulated for the selection of the CFD software and models involved.

Determining amino acid scores of the genetic code table: Complementarity, structure, function and evolution

The Standard Genetic Code (SGC) table was investigated with respect to the three-dimensional codon arrangement, and all possible 24 hierarchical base partitions (4! = 24). This was done by determining the amino acid scores for each codon hierarchy in relation to the 1st horizontal, 2nd vertical and 3rd horizontal sub-tables.Marked differences were observed for the hydrophobicity and lipophilicity parameters encoded by the second base of the SGC table. The nucleotide hierarchy U < C < G < A and its complement A < G < C < U at the second base correlated best with the amino acid hydrophobicity and polarity. By contrast, the hierarchy C < G < U < A and its backwards transcript A < U < G < C at the second base were associated with the amino acid parameters of lipophilicity and accessible surface area.No association was observed between 24 base hierarchies of the codons at the 1st and 3rd positions with respect to the hydropathy, polarity, lipophilicity and accessible surface area. The results imply that the second base possesses the majority of information content with respect to the physicochemical properties observed.It is shown that amino acid information obtained by determining the scores of the bases and codon weightings in digital form coincides with physicochemical properties, and the temperature range between 25 °C and 100 °C does not affect the hydrophobicity, the related prediction of α- and β-protein structure, codon scores, or the complementarity code for sense and antisense peptide interactions.The amino acid scores determined for the SGC table enable the construction of rules and algorithms for the analysis of the structure, function and evolution of proteins. It has been demonstrated that IUPAC-based encoding of nucleobase and amino acid sequences could be used for the representation of the bases with the Semiotic (Greimas) Square and probabilistic square of opposition.It is concluded that the structural, functional and evolutionary patterns of the protein sequences may be modeled using codon based amino acid information, instead of using the information based on amino acid physicochemical properties only.

Crystal structure of a salt with a protonated sugar cation and a cobalt(II) complex anion: (GlcN–H, K)[Co(NCS)4]·2H2O

The title compound, D-(+)-glucosammonium potassium tetrathiocyanatocobaltate(II) dihydrate, K(C6H14NO5)[Co(NCS)4]·2H2O or (GlcNH)(K)[Co(NCS)4]·2H2O, has been obtained as a side product of an incomplete salt metathesis reaction of D-(+)-glucosamine hydrochloride (GlcN·HCl) and K2[Co(NCS)4]. The asymmetric unit contains a D-(+)-glucosammonium cation, a potassium cation, a tetraisothiocyanatocobalt(II) complex anion and two water molecules. The water molecules coordinate to the potassium cation, which is further coordinated via three short K+...SCN− contacts involving three [Co(NCS)4]2− complex anions and via three O atoms of two D-(+)-glucosammonium cations, leading to an overall eightfold coordination around the potassium cation. Hydrogen-bonding interactions between the building blocks consolidate the three-dimensional arrangement.

A Concept Design of Diesel – Hydraulic Propulsion System for Passenger Ship Intended for Inland Shallow Water Navigation

Abstract This paper presents an analysis of environmental and technical conditions necessary for working out a possibly most favourable propulsion system for a two – segment passenger ship intended for navigation between Berlin and Kaliningrad. There are presented various types of propulsion systems for small ships as well as analyzed their possible applications and consequences. In this work there were taken into account system’s reliability, efficiency, dimensions, mass and costs of manufacturing, assembling and possible replacing the system components as well as an impact on maneuverability and natural environment. With taking into account the above mentioned criteria it was finally found that the diesel-hydraulic system fitted with two azimuthal ducted solid propellers is the most favourable. There are also presented a schematic propulsion and control diagram, three-dimensional arrangement drawing of system components as well as assembly drawing of the designed azimuthal propulsion system.

Identification of Essential 2D and 3D Chemical Features for Discovery of the Novel Tubulin Polymerization Inhibitors.

Tubulin polymerization inhibitors interfere with microtubule assembly and their functions lead to mitotic arrest, therefore they are attractive target for design and development of novel anticancer compounds. The proposed novel and effective structures following the use of three-dimensionalquantitative structure activity relationship (3D-QSAR) pharmacophore based virtual screening clearly demonstrate the high efficiency of this method in modern drug discovery. Combined computational approach was applied to extract the essential 2D and 3D features requirements for higher activity as well as identify new anti-tubulin agents. The best quantitative pharmacophore model, Hypo1, exhibited good correlation of 0.943 (RMSD=1.019) and excellent predictive power in the training set compounds. Generated model AHHHR, was well mapped to colchicine site and three-dimensional spatial arrangement of their features were in good agreement with the vital interactions in the active site. Total prediction accuracy (0.92 for training set and 0.86 for test set), enrichment factor (4.2 for training set and 4.5 for test set) and the area under the ROC curve (0.86 for training set and 0.94 for the test set), the developed model using Extended Class FingerPrints of maximum diameter 4 (ECFP_4) was chosen as the best model. Developed computational platform provided a better understanding of requirement features for colchicine site inhibitors and we believe the results of this study might be useful for the rational design and optimization of new inhibitors.

Automated requirements-driven design synthesis of gearboxes with graph-based design languages using state of the art tools

In order to best match individual customer requirements in gearbox applications, customer-tailored gearboxes are a desirable solution. That leads to the demand for a truly individualized product development. In order to keep costs down despite an increasing product variability, novel digital design methods which automate the design process and avoid redundant manual work need to be developed and deployed. Graph-based design languages in UML (Unified Modeling Language) use a central data model to guarantee model consistency and to generate automatically multi-disciplinary models and simulations thereof. The paper shows the use of graph-based design languages for automated gear synthesis and the automated three dimensional arrangement of gearset parts. The aim of this language is to generate the gearset including the gear calculation. The calculation automation is supported with the domain-specific synthesis tool GAP (‘Getriebe Auslegungs Programm’). The resulting gearset is then packaged into a given design space provided as one of the customer requirements. The package problem is the subject of several boundary conditions and for this reasons normally multiple solutions do exist. Therefore, optimization methods are used in the following to select the final three-dimensional arrangement. The current state of the gear system model also includes a fully parametric CAD housing. The approach shown in this paper can be extended to the entire product life cycle, also including domain-specific and already established software solutions. Finally, the opportunity is present to include further product assessments like a cost calculation and a first reliability check of the system. The authors are aware of the fact that this fully automated process is currently still restricted to a specific class of product design problems such as gears and gearbox design.

Three-dimensional structure of stem vascular connections with leaf and adventitious root in Asplundia brachypus (Drude) Harling (Cyclanthaceae)

The monocotyledonous vascular system is complex in arrangement, and its anatomical study is relevant to understand sap conduction in the group and elucidate stelar terminological issues. This work aimed to characterize the three-dimensional structure of the stem vascular connections with the leaf and adventitious root in Asplundia brachypus (Drude) Harling (Cyclanthaceae). Three internodes from different individuals were serially cross-sectioned for the preparation, photomicrography and description of anatomical slides. Three-dimensional representations of leaf and root trace courses were produced using R software. Leaf and root traces are simple collateral bundles with tracheary elements of small diameter. Acropetally, leaf traces show a centrifugal course along the internode and tangentially incline at the nodal level. At the adventitious root level, root traces arrange in a root vascular plexus extending up- and downward, longitudinally delimited by parenchyma. The small diameter of tracheary elements in leaf and root traces, the course extension of leaf traces and the longitudinal discontinuity of root traces with axial vascular bundles indicate conductive safety at the stem vascular connections with the leaf and adventitious root in A. brachypus. The three-dimensional vascular arrangement in the stem was demonstrated using an alternative methodology in representing bundle courses, evidencing the misleading nature of the terms "atactostele" and "placostele", alternatively described as a monocot cyclostele.

Hydrophobic recognition allows the glycosyltransferase UGT76G1 to catalyze its substrate in two orientations

Diets high in sugar are recognized as a serious health problem, and there is a drive to reduce their consumption. Steviol glycosides are natural zero-calorie sweeteners, but the most desirable ones are biosynthesized with low yields. UGT76G1 catalyzes the β (1–3) addition of glucose to steviol glycosides, which gives them the preferred taste. UGT76G1 is able to transfer glucose to multiple steviol substrates yet remains highly specific in the glycosidic linkage it creates. Here, we report multiple complex structures of the enzyme combined with biochemical data, which reveal that the enzyme utilizes hydrophobic interactions for substrate recognition. The lack of a strict three-dimensional recognition arrangement, typical of hydrogen bonds, permits two different orientations for β (1–3) sugar addition. The use of hydrophobic recognition is unusual in a regio- and stereo-specific catalysis. Harnessing such non-specific hydrophobic interactions could have wide applications in the synthesis of complex glycoconjugates.

5-Methyl-1,3-phenyl-ene bis-[5-(di-methyl-amino)-naphthalene-1-sulfonate]: crystal structure and DFT calculations.

The title compound, C31H30N2S2O6, possesses crystallographically imposed twofold symmetry with the two C atoms of the central benzene ring and the C atom of its methyl substituent lying on the twofold rotation axis. The two dansyl groups are twisted away from the plane of methyl-phenyl bridging unit in opposite directions. The three-dimensional arrangement in the crystal is mainly stabilized by weak hydrogen bonds between the sulfonyl oxygen atoms and the hydrogen atoms from the N-methyl groups. Stacking of the dansyl group is not observed. From the DFT calculations, the HOMO-LUMO energy gap was found to be 2.99 eV and indicates n→π* and π→π* transitions within the mol-ecule.

Chitosan-cellulose particles as delivery vehicles for limonene fragrance

This study proposes the use of chitosan-cellulose particles to encapsulate limonene, a fragrant component widely used in the flavor and fragrance industries. As cellulose possesses a stiff molecular structure due to the three-dimensional arrangement of hydrogen bonded hydroxyls, its dissolution is difficult to achieve. To surpass this constraint, and solubilize cellulose, LiOH/urea/water systems were tested using different freezing temperatures and number of freezing/thawing/stirring cycles. Then, chitosan-cellulose composite particles were produced and characterized by Scanning Electron Microscopy (SEM) to assess morphology and size, and by Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetric Analysis (TGA) to access chitosan-cellulose molecular interactions. The release behaviour of limonene from the chitosan-cellulose particles was studied by gas chromatography (GC). The obtained particles presented an average diameter ranging from 1 to 2 mm and spherical shape, characteristics very similar to the corresponding empty cellulose-chitosan composite particles. A good affinity was found between the two biopolymers, cellulose and chitosan. The achieved encapsulation efficiency of limonene was 51.29%, and the produced particles demonstrated a burst release of limonene in the first 24 h, followed by a decrease over 162 h. Based on the achieved results this system seems favourable for applications requiring preservation of sensory qualities and prolonged release of fragrances.

Comparison of three-dimensional versus two-dimensional structure of mesoporous alumina as support of (Ni)MoS2 catalysts for HDS

Ordered mesoporous alumina (OMA), and commercial non ordered mesoporous alumina (CMA) were used as support to synthesize NiMo catalysts with a metal loading of 16%Wt. OMA synthesis was made using Pluronic (P123) as structure directing agent, and ethanol as a solvent. The physical and chemical properties of the supports and catalysts were characterized by XRD, nitrogen physisorption, X-ray photoelectron spectroscopy (XPS), Transmission electron microscopy (TEM), acidity of support was studied by n-butylamine adsorption followed by FTIR and catalytic performance was evaluated by hydrodesulphurization of dibenzothiophene (DBT) reaction. Main difference of supports is a two-dimensional arrangement of pores on OMA support and a three-dimensional arrangement for CMA. OMA support has more surface area available to disperse Mo and Ni species than the CMA material, besides OMA present slight acidity on its surface, and these characteristics of support leaded to obtain a NiMoS2 active phase better structured to present higher activity for DBT hydrodesulphurization and higher selectivity for direct desulfurization than the obtained for CMA supported catalyst, despite CMA presented interconnected pores and higher pore diameter.

The production of a novel poly(vinyl alcohol) hydrogel cryogenic spheres for immediate release using a droplet system

Although freeze-thaw mechanism for producing crosslinked hydrogels is relatively easy and simple, it lacks sufficient integrity and support leading to modifications on its three-dimensional polymeric network arrangement during water removal—drying. Therefore, a strengthening method for obtaining cryogenic spheres of polyvinyl alcohol hydrogels is purposed by dispensing it as liquid droplets into a low temperature solution followed by a modification on its freeze-thaw cycles to confer a good geometry without aggregation. Various materials were incorporated into this hydrogel structure, including poly(acrylic acid) to impart pH sensitivity; hydroxyapatite to improve biocompatibility; and ciprofloxacin as an antimicrobial agent relevant for the treatment of osteomyelitis. The overall network presented a porous structure with a fibrous-like pattern which varied in size and volume, with presence of Ca and P when hydroxyapatite is incorporated. These materials varied the crystalline melting point of the poly(vinyl alcohol) and a linear pH sensitivity function was obtained by the addition of the materials. These hydrogels were found to release ciprofloxacin within 60 min and were able to dissolve at the same time intervals. Therefore, the hydrogel synthesised in this work can be used as an immediate release drug delivery mechanism for the in situ delivery of active pharmaceutical such as ciprofloxacin for a treatment of osteomyelitis.

Fluid dynamics of oscillatory flow in three-dimensional branching networks

The present study is aimed at understanding and thoroughly documenting the complex unsteady fluid dynamics in six generations of a model human bronchial tree, comprising 63 straight sections and 31 bifurcation modules, during a complete breathing cycle. The computational task is challenging since the complexity of an elaborate network is augmented with adopted stringent criteria for spatial and temporal accuracy and convergence at each time step (10−8 for each scaled residual). The physical understanding of the fluid dynamics of steady expiratory flow is taken to a similar level of fine details that have been previously established for steady inspiratory flow in earlier publications of the authors. The effects of three-dimensional arrangement of the same branches on the oscillatory flow structure are determined. It is found that the quasisteady assumption is approximately valid in the neighborhood of the peak flow rate, both during inspiration and expiration. Unsteady effects are at their maximum during the changeover from expiration to inspiration and inspiration to expiration. At these time instants, regions of bidirectional flow are observed in all branches with significant secondary motion at various cross sections (none of these features can be predicted by steady state simulations). It is described how the symmetry of the solution with respect to both space and time—found in the oscillating, fully developed flow in a pipe—are destroyed in the unsteady effects that occur in the oscillating flow in a branching network. As the Womersley number is increased, the unsteady effects at all branches increase, and bidirectional flow exists over a greater portion of a cycle. The flow division at a bifurcation module during inspiratory flow generates large asymmetry in the flow field with nonuniform mass flow distribution among the branches of a generation (even in a geometrically symmetric network), whereas flow combination at the same bifurcation module during expiratory flow tends to produce more symmetry in the flow field, displaying essential irreversibility of fluid dynamics.

Numerical study on convective flow in a three-dimensional enclosure with hot solid body and discrete cooling

The aim of the present numerical study is to analyze the effect of cooler location and aspect ratio and position of the hot solid body inside the enclosure on three-dimensional natural convection flow in a cubical enclosure. The cooler and heater positions and aspect ratio of the heater in a cavity are examined under different combinations of partially cooling vertical sidewalls and, hot solid body in the cubical cavity. That is, (i) different cooler locations with a fixed size of the hot solid body, and, (ii) centrally located hot solid body with different aspect ratio. The three-dimensional convective flow and thermal arrangements in the enclosure are analyzed using the distribution of streamlines, isosurfaces, and Nusselt number. It is found that the cooler location and aspect ratio of hot solid body play a key role on convective cooling and energy transport inside the enclosure. The unit aspect ratio of hot solid body provides higher energy transport inside the enclosure for all cooler positions.

Crystal structure of 210,220-bis-(2,6-di-chloro-phen-yl)-4,7,12,15-tetra-oxa-2(5,15)-nickel(II)porpyhrina-1,3(1,2)-dibenzena-cyclo-hepta-deca-phane-9-yne di-chloro-methane monosolvate.

The asymmetric unit of the title compound, [Ni(C52H34Cl4N4O4)]·CH2Cl2, consists of two discrete complexes, which show significant differences in the conformation of the side chain. Each NiII cation is coordinated by four nitro-gen atoms of a porphyrin mol-ecule within a square-planar coordination environment. Weak intra-molecular C-H⋯Cl and C-H⋯O inter-actions stabilize the mol-ecular conformation. In the crystal structure, discrete complexes are linked by C-H⋯Cl hydrogen-bonding inter-actions. In addition, the two unique di-chloro-methane solvate mol-ecules (one being disordered) are hydrogen-bonded to the Cl atoms of the chloro-phenyl groups of the porphyrin mol-ecules, thus stabilizing the three-dimensional arrangement. The crystal exhibits pseudo-ortho-rhom-bic metrics, but structure refinements clearly show that the crystal system is monoclinic and that the crystal is twinned by pseudo-merohedry.

Prospects and Challenges of Supramolecular Approaches in Corrosion Prevention Strategies

Supramolecular chemistry, the ‘chemistry of molecular assemblies’ is a fascinating realm of modern science where researchers are constantly investigating the possibilities of the design of novel supramolecular structures, surfaces and techniques in different application areas including corrosion prevention. Supramolecular species are branded by the three-dimensional arrangement of their constituents and by the nature of the intermolecular interactions [1, 2]. They can be conveniently classified into (i) molecular self-assemblies, (ii) host-guest complexes, and (iii) molecules built to specific shapes (rotaxanes, dendrimers etc.). A supramolecular self-assembly can be defined as the spontaneous organization of a few or many components forming structurally well-defined supramolecules through non-covalent interactions in a given set of conditions. In the host-guest chemistry, a host (a large molecule, aggregate or a cyclic compound possessing cavity) binds a guest (another molecule) yielding a host-guest complex (supramolecule). Corrosion is inevitable and causes material destruction and component failures [3, 4]. Recently, supramolecular concepts have found extensive interest in Corrosion Science and Technology where areas like smart coatings have been widely studied. The presentation aims to provide a comprehensive outlook on applications and potentials of supramolecular chemistry in corrosion prevention. The research advancements in this area will be presented under two subheads: surface coatings and corrosion inhibitors (Figure 1). In each section, advancements in polymeric, host-guest based systems, organic-inorganic hybrid systems, and other supramolecular structures and techniques will be discussed [5]. Recent updates in this area will be presented along with a few of our ongoing research efforts on mesoporous silica-based host-guest systems. Existing challenges to practical applications will be debated. References J.M. Lehn, Proc. Natl. Acad. Sci. USA, 2002, 99, 4763-4768.J.W. Steed, J.L. Atwood, Supramolecular chemistry, Wiley, 2000, ISBN 978-0-470-51234-0.V.S. Saji, J. Thomas, Current Science, 2007, 92, 51-55.V.S. Saji, R. Cook, Corrosion control and prevention using nanomaterials, 2012, Elsevier Science, ISBN: 978-1-84569-949-9.V.S. Saji, Corrosion Reviews, 2019, Submitted. Figure 1

Atomic Layer Deposition of Titania in Ordered Mesoporous Cerium Zirconium Oxide Thin Films: A Case Study

A strategy is presented to deposit defined layers of TiO2 onto the pore surface within ordered mesoporous, crystalline CeO2-ZrO2 thin films using atomic layer deposition (ALD). As structure-directing agent, a special diblock copolymer, poly(isobutylene)-block-poly(ethylene oxide), was used, resulting in a three-dimensional arrangement of spherical pores with diameter around 13 nm. High resolution transmission electron microscopy investigations evidence the presence of anatase TiO2 coatings within the mesopores, while ellipsometric porosimetry studies together with time-of-flight secondary-ion mass spectrometry depth profiles indicate the deposition inside the mesopores up to 50 ALD cycles. Afterward, the interconnecting channels between the mesopores are filled completely prohibiting further transport of the gaseous TiO2 precursor into the ordered structure of mesopores and hence, limit the layer growth on the surfaces of the pores. Therefore, the size of the mesopores and their connections are decisive w...