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Articles by Ute Kaiser
Organic two-dimensional van der Waals heterostructures
Abstract Van der Waals heterostructures based on graphene and inorganic two-dimensional (2D) crystals enable exquisite control of interlayer coupling, and emergent electronic and optical phenomena1,2. Extending this concept to organic 2D crystals has been hindered by weak, non-directional interlayer interactions that frustrate lattice registry. Here we introduce a bottom-up strategy for programmable lattice engineering in organic van der Waals heterostructures of 2D polymers.
Towards single-crystalline two-dimensional poly(arylene vinylene) covalent organic frameworks - Nature Chemistry
Abstract Vinylene-linked two-dimensional (2D) conjugated covalent organic frameworks, or 2D poly(arylene vinylene)s (2D PAVs), are promising polymer semiconductors for (opto-)electronics, photocatalysis and electrochemistry. However, conventional solvothermal synthesis often produces 2D PAVs that are poorly crystalline or difficult to access.
Monolayer nanocrystalline graphene synthesized from pyrolyzing a Langmuir monolayer of a polyaromatic hydrocarbon
Abstract Bulk carbon materials can be synthesized through the modulation of precursor structures, stacking mode, and the optimization of pyrolysis conditions. The structure of two-dimensional (2D) carbon materials, however, is mainly driven by the pyrolysis temperature, pressure, and organic gas flow rates.
Sulfophenylated centimeter-sized graphene membrane in a direct methanol fuel cell - Nature Communications
Abstract An ideal proton exchange membrane should only allow protons to pass and remain impermeable to fuels, as required in fuel cell applications. In methanol fuel cells, high proton conductivity enables high power density, whereas methanol crossover between the electrodes degrades the catalyst activity and lowers efficiency.
The role of carbon catalyst coatings in the electrochemical water splitting reaction - Nature Communications
Abstract Designing inexpensive, sustainable, and high-performance oxygen-evolution reaction (OER) electrocatalysts is one of the largest obstacles hindering the development of new electrolyzers. Carbon-coated metal/metal oxide (nano)particles have been used in such applications, but the role played by the carbon coatings is poorly understood.
Unveiling high-mobility hot carriers in a two-dimensional conjugated coordination polymer - Nature Materials
Abstract Hot carriers, inheriting excess kinetic energy from high-energy photons, drive numerous optoelectronic applications reliant on non-equilibrium transport processes. Although extensively studied in inorganic materials, their potential in organic-based systems remains largely unexplored. Here we demonstrate highly mobile hot carriers in crystalline two-dimensional conjugated coordination polymer Cu3BHT (BHT, benzenehexathiol) films.
The Zr8O6 Secondary Building Unit and Porphyrin Linker Catalyze Light‐Driven H2 Evolution in Porphyrin‐Based Metal Organic Frameworks
Supporting Information As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors.
Two-dimensional polyaniline crystal with metallic out-of-plane conductivity - Nature
Abstract Linear conducting polymers show ballistic transport, imposed by mobile carriers moving along the polymer chains1,2, whereas conductance in the extended dimension, that is, between polymer strands or layers, remains weak due to the lack of intermolecular ordering and electronic coupling3,4,5. Here we report a multilayer-stacked two-dimensional polyaniline (2DPANI) crystal, which shows metallic out-of-plane charge transport with high electrical conductivity.
Publisher Correction: Elastic films of single-crystal two-dimensional covalent organic frameworks - Nature
Correction to: Nature https://doi.org/10.1038/s41586-024-07505-x Published online 8 May 2024 In the version of this article initially published, there was an error in the affiliation numbering for affiliations 2–5, which is now remedied in the HTML and PDF versions of the article. About this article Yang, Y., Liang, B., Kreie, J. et al. Publisher Correction: Elastic films of single-crystal two-dimensional covalent organic frameworks. Nature (2024).
Defect Density and Atomic Defect Recognition in the Middle Layer of a Trilayer MoS2 Stack
Download Hi-Res ImageDownload to MS-PowerPointCite This:Nano Lett.
Elastic films of single-crystal two-dimensional covalent organic frameworks - Nature
Abstract The properties of polycrystalline materials are often dominated by defects, and two-dimensional (2D) crystals can even be divided and disrupted by a line defect1-3. In contrast, 2D crystals are often required to be processed into films, which are inevitably polycrystalline and contain numerous grain boundaries, and therefore are brittle and fragile, hindering application in flexible electronics, optoelectronics and separation1-4.
Hierarchical conductive metal-organic framework films enabling efficient interfacial mass transfer - Nature Communications
Abstract Heterogeneous reactions associated with porous solid films are ubiquitous and play an important role in both nature and industrial processes. However, due to the no-slip boundary condition in pressure-driven flows, the interfacial mass transfer between the porous solid surface and the environment is largely limited to slow molecular diffusion, which severely hinders the enhancement of heterogeneous reaction kinetics.
Isotopic Labelling of Confined Carbyne
Communication Prof. Kecheng Cao School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210 P. R. China Central Facility for Electron Microscopy, Electron Microscopy Group of Materials Science, Ulm University, 89081 Ulm, Germany Search for more papers by this author PDF ShareShare Abstract Carbyne is a one‐dimensional allotrope of carbon consisting of a linear chain of carbon atoms bonded to each other with exceptional strength.
Power generation by reverse electrodialysis in a single-layer nanoporous membrane made from core-rim polycyclic aromatic hydrocarbons
Abstract Nanoporous graphene and related atomically thin layered materials are promising candidates in reverse electrodialysis research owing to their remarkable ionic conductivity and high permselectivity. The synthesis of atomically thin nanoporous membranes with a narrow pore size distribution, however, remains challenging. Here, we report the fabrication of nanoporous carbon membranes via the thermal crosslinking of core–rim structured monomers, that is, polycyclic aromatic hydrocarbons.
Modular Design of Noble Metal‐free Mixed Metal Oxide Electrocatalysts for Complete Water‐Splitting
The full text of this article hosted at iucr.org is unavailable due to technical difficulties.
Modular Design of Noble Metal‐free Mixed Metal Oxide Electrocatalysts for Complete Water‐Splitting
The full text of this article hosted at iucr.org is unavailable due to technical difficulties.
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