The Experts below are selected from a list of 6966 Experts worldwide ranked by ideXlab platform

Ziqi Sun - One of the best experts on this subject based on the ideXlab platform.

  • fly compound eye inspired Inorganic Nanostructures with extraordinary visible light responses
    Science & Engineering Faculty, 2016
    Co-Authors: Ziqi Sun, Ting Liao, Jung Ho Kim, Liyuan Sheng, S X Dou, John Bell
    Abstract:

    Inorganic bio-inspired nanomaterials, which integrate the unique properties of metal oxide nanomaterials and the features of well-evolved biological structures and functions, are a novel direction towards mining the potential of existing materials to further enhance the performance of various microelectronic and energy harvesting, conversion, and storage devices, although the facile fabrication of bio-inspired materials still remains a major challenge. We noticed that some compound eyes presented extremely strong responses to light and displayed beautiful colours and patterns, which inspired us to design novel photonic materials. In this study, we fabricated fly compound-eye inspired ZnO nanomaterials in the forms of either isolated microspheres or highly-ordered coatings grown in-situ, in which the three-zone structures were similar to the anatomical structure of the biological compound eyes, including an outermost faceted microlens array, a middle rhabdom-like channel layer, and a central hollow zone. The bio-inspired nanomaterials, as we expected, presented extraordinary visible-light response behaviour and would make it possible to capture energy across a wide solar spectrum with a single semiconductor material. This study thus paves the way to further improving the performance of the current photoelectronic and energy harvesting, conversion, and storage devices.

  • Fly-eye inspired superhydrophobic anti-fogging Inorganic Nanostructures
    Small, 2014
    Co-Authors: Ziqi Sun, Kesong Liu, Lei Jiang, Ting Liao, Jung Ho Kim, Shi Xue Dou
    Abstract:

    Fly-eye bio-inspired Inorganic Nanostructures are synthesized via a two-step self-assembly approach, which have low contact angle hysteresis and excellent anti-fogging properties, and are promising candidates for anti-freezing/fogging materials to be applied in extreme and hazardous environments.

Shi Xue Dou - One of the best experts on this subject based on the ideXlab platform.

Matteo Baldoni - One of the best experts on this subject based on the ideXlab platform.

  • Low dimensional Nanostructures of fast ion conducting lithium nitride.
    Nature communications, 2020
    Co-Authors: Nuria Tapia-ruiz, Alexandra G. Gordon, Catherine M. Jewell, Hannah K. Edwards, Charles W. Dunnill, James M. Blackman, Colin P. Snape, Paul D. Brown, Ian Maclaren, Matteo Baldoni
    Abstract:

    As the only stable binary compound formed between an alkali metal and nitrogen, lithium nitride possesses remarkable properties and is a model material for energy applications involving the transport of lithium ions. Following a materials design principle drawn from broad structural analogies to hexagonal graphene and boron nitride, we demonstrate that such low dimensional structures can also be formed from an s-block element and nitrogen. Both one- and two-dimensional Nanostructures of lithium nitride, Li3N, can be grown despite the absence of an equivalent van der Waals gap. Lithium-ion diffusion is enhanced compared to the bulk compound, yielding materials with exceptional ionic mobility. Li3N demonstrates the conceptual assembly of ionic Inorganic Nanostructures from monolayers without the requirement of a van der Waals gap. Computational studies reveal an electronic structure mediated by the number of Li-N layers, with a transition from a bulk narrow-bandgap semiconductor to a metal at the nanoscale.

Reshef Tenne - One of the best experts on this subject based on the ideXlab platform.

  • decoration of Inorganic Nanostructures by metallic nanoparticles to induce fluorescence enhance solubility and tune band gap
    Journal of Physical Chemistry C, 2018
    Co-Authors: Priyadarshi Ranjan, Sreejith Shankar, Sidney R. Cohen, Tali Dadosh, Linda J. W. Shimon, Ronit Popovitzbiro, Ifat Kaplanashiri, Bojana Visic, Reshef Tenne
    Abstract:

    We report here a unique and efficient methodology for the surface functionalization of closed-cage Inorganic fullerene-like (IF) nanoparticles and Inorganic nanotubes (INTs) composed of two-dimensional nanomaterials of transition-metal chalcogenides (MS2; M = W or Mo). The first step is the physical coverage of these robust Inorganic materials with monodispersed and dense monolayers of gold, silver, and palladium nanoparticles. The structural continuity at the interface between the IF/INT and the metallic nanoparticles is investigated. Lattice matching between these nanocrystalline materials and strong chemical affinity lead to efficient binding of the metallic nanoparticles onto the outer sulfide layer of the MS2-based structures. It is shown that this functionalization results in narrowing of the IF/INT optical band gap, increased work function, and improved surface-enhanced Raman scattering. In the second step, functionalization of the surface-bound nanoparticles is carried out by a ligand-exchange rea...

  • Decoration of Inorganic Nanostructures by Metallic Nanoparticles to Induce Fluorescence, Enhance Solubility, and Tune Band Gap
    2018
    Co-Authors: Priyadarshi Ranjan, Sreejith Shankar, Ronit Popovitz-biro, Sidney R. Cohen, Ifat Kaplan-ashiri, Tali Dadosh, Linda J. W. Shimon, Bojana Višić, Reshef Tenne, Michal Lahav
    Abstract:

    We report here a unique and efficient methodology for the surface functionalization of closed-cage Inorganic fullerene-like (IF) nanoparticles and Inorganic nanotubes (INTs) composed of two-dimensional nanomaterials of transition-metal chalcogenides (MS2; M = W or Mo). The first step is the physical coverage of these robust Inorganic materials with monodispersed and dense monolayers of gold, silver, and palladium nanoparticles. The structural continuity at the interface between the IF/INT and the metallic nanoparticles is investigated. Lattice matching between these nanocrystalline materials and strong chemical affinity lead to efficient binding of the metallic nanoparticles onto the outer sulfide layer of the MS2-based structures. It is shown that this functionalization results in narrowing of the IF/INT optical band gap, increased work function, and improved surface-enhanced Raman scattering. In the second step, functionalization of the surface-bound nanoparticles is carried out by a ligand-exchange reaction. This ligand exchange involving the tetraoctylammonium bromide capping layer and an alkyl thiol enhances the solubility (∼10×) of the otherwise nearly insoluble materials in organic solvents. The scope of this method is further demonstrated by introducing a ruthenium­(II) polypyridyl complex on the surface of the surface-bound AuNPs to generate fluorescent multicomponent materials

Marcus Scheele - One of the best experts on this subject based on the ideXlab platform.

  • prospects of coupled organic Inorganic Nanostructures for charge and energy transfer applications
    Angewandte Chemie, 2021
    Co-Authors: Anja Maria Steiner, Jannika Lauth, Franziska Lissel, Andreas Fery, Marcus Scheele
    Abstract:

    We review the field of organic-Inorganic nanocomposites with a focus on materials that exhibit a significant degree of electronic coupling across the hybrid interface. These nanocomposites undergo a variety of charge and energy transfer processes, enabling optoelectronic applications in devices which exploit singlet fission, triplet energy harvesting, photon upconversion or hot charge carrier transfer. We discuss the physical chemistry of the most common organic and Inorganic components. Based on those we derive synthesis and assembly strategies and design criteria on material and device level with a focus on photovoltaics, spin memories or optical upconverters. We conclude that future research in the field should be directed towards an improved understanding of the binding motif and molecular orientation at the hybrid interface.

  • correlated dual beam optical gating in coupled organic Inorganic Nanostructures
    Angewandte Chemie, 2018
    Co-Authors: Kai M Wurst, Markus Bender, Jannika Lauth, Sonam Maiti, Thomas Chasse, Alfred J Meixner, Laurens D A Siebbeles, Uwe H F Bunz, Kai Braun, Marcus Scheele
    Abstract:

    An optical switch with two distinct resonances is formed by combining PbS nanocrystals and the conductive polymer poly[sodium 2-(2-ethynyl-4-methoxyphenoxy)acetate] (PAE) into a hybrid thin film. Infrared excitation of the nanocrystals invokes charge transfer and consecutive polaron formation in the PAE, which activates the switch for excited-state absorption at visible frequencies. The optical modulation of the photocurrent response of the switch exhibits highly wavelength-selective ON/OFF ratios. Transient absorption spectroscopy shows that the polaron formation is correlated with the excited state of the nanocrystals, opening up new perspectives for photonic data processing. Such correlated activated absorption can be exploited to enhance the sensitivity for one optical signal by a second light source of different frequency as part of an optical amplifier or a device with AND logic.

  • coupled organic Inorganic Nanostructures coin
    Physical Chemistry Chemical Physics, 2015
    Co-Authors: Marcus Scheele, Wolfgang Brutting, Frank Schreiber
    Abstract:

    In this perspective, we provide an overview of the emerging field of coupled conjugates of quantum dots and organic semiconductors, referred to as “coupled organic–Inorganic Nanostructures” (COIN). We summarize important aspects of their optical properties and highlight suitable descriptions of their electrical transport behavior. In particular, we discuss the key role of the electronic structure at the interface of COINs and the impact of structural/morphological features on the optoelectronic properties. Finally, we comment on the physics of current quantum dot-based devices and novel opportunities provided by the application of COINs in this respect.