Materials Literature
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Nanomultiple CaFe2O4/ZnFe2O4pn junctions are prepared by a pulsed laser deposition method to explore their photoelectrochemical properties as the photoelectrodes. It is demonstrated that the multiple-pn-junction structure is favorable to enhancing the photocurrent density and the onset potential of the photoelectrode.…
Porous polymeric films are promising materials for the production of ultralow-dielectric constant materials. A high porosity polyimide thin film was prepared via the phase separation of a polyimide precursor in an N, N -dimethylacetamide (solvent)/2-(diethylamino)ethyl methacrylate/photoinitiator system. A novel techn…
Solar energy production, one of the world's most important unsolved problems, has the potential to be a source of clean, renewable energy if scientists can find a way of generating cheap and efficient solar cells. Generation of multiple excitons from single photons is one way to increase the efficiency of solar energy…
Liquid crystal ordering is an opportunity to develop novel materials and applications with spontaneously aligned nanotubes or graphene particles. Nevertheless, achieving high orientational order parameter and large monodomains remains a challenge. In addition, our restricted knowledge of the structure of the currently…
Bacterial microcompartments (MCPs) are large proteinaceous structures comprised of a roughly icosahedral shell and a series of encapsulated enzymes. MCPs carrying out three different metabolic functions have been characterized in some detail, while gene expression and bioinformatics studies have implicated other types…
We report a high yield synthesis of single-wall boron nitride nanotubes (SWBNNTs) inside single-wall carbon nanotubes (SWCNTs), a nano-templated reaction, using ammonia borane complexes (ABC) as a precursor. Transmission electron microscope (TEM), high angle annular dark field (HAADF)-scanning TEM (STEM), electron ene…
This is a comparative study in search for common patterns in the relaxation dynamics of amorphous materials in the approach of a liquid-to-solid transition from the liquid side. Observations with two representative materials provide guidance for the study. The first material, a concentrated colloidal suspension, repre…
Self-assembled monolayers of a 6-nitro BIPS spiropyran (SP) modified with a disulfide-terminated aliphatic chain were prepared on polycrystalline gold surfaces and characterized by UV/vis absorption, surface-enhanced Raman scattering (SERS), and X-ray photoelectron spectroscopies (XPS). The SAMs obtained are composed…
Abstract This Review focuses on the structure‐reactivity relationship of three main classes of photolabile protecting groups (PPGs), that is, the 2‐nitrobenzyl (NB) series of PPGs, carbonyl‐based PPGs, and benzyl‐based PPGs. Recent efforts in developing new PPGs for protection of carbonyl and hydroxy groups are also d…
In this article, we have investigated the effect of oxygen partial pressure (PO2) and film thickness on defect-induced room-temperature (RT) ferromagnetism (FM) of highly c-axis orientated p-type Na-doped ZnO thin films fabricated by pulse laser deposition (PLD) technique. We have found that the substitution of Na at…
Abstract Mesoporous titania (TiO2) thin films are prepared by a spin‐coating method using new laboratory‐made polystyrene‐block‐polybutadiene‐block‐polystyrene‐based triblock copolymers in which the polystyrene block is functionalized with hydrophilic sulfonic groups (abbreviated as sulfonated HmSEBmS). The polymer us…
Surface-attached polymer networks that carry light-responsive nitrospiropyran groups in a hydrophilic PDMAA matrix were prepared on planar silicon and glass surfaces and were characterized with respect to their switching behavior under the influence of an external light trigger. Functional polymers bearing light-respo…
In nanotoxicology, the capacity of nanoparticles of the same composition but different shape to induce cytotoxicity and genotoxicity is largely unknown. A series of cytotoxic and genotoxic responses following in vitro exposure to differently shaped CuO nanoparticles (CuO NPs, mass concentrations from 0.1 to 100 μg/ml)…
Abstract Spatially and spectrally resolved cathodoluminescence (CL) is one of the most effective methods to explore the optical properties of a nanomaterials and reveals the spatial distribution as well as the correlation between the luminescence and the sample morphology and microstructure. Here, CL modulation of ZnS…
Spin caloritronics devices are very important for future development of low-power-consumption technology. We propose a new spin caloritronics device based on zigzag graphene nanoribbon (ZGNR), which is a heterojunction consisting of single-hydrogen-terminated ZGNR (ZGNR-H) and double-hydrogen-terminated ZGNR (ZGNR-H2)…
The structure and composition of core–shell CuCo nanoparticles were found to change as a result of cleaning pretreatments and when exposed to syngas (CO + H 2 ) at atmospheric pressure. In situ X-ray absorption and photoelectron spectroscopies revealed the oxidation state of the particles as well as the presence of ad…
This paper describes an effective approach to order gold nanorods (NRs) within cylindrically confined microdomains of block copolymer- (BCP-) based supramolecular assemblies. Individual BCP micelles encapsulated with well-ordered NRs can be obtained by disassembling the supramolecular structures. The mismatch of binar…
All materials undergo life-cycle processes and ultimately lose their structural integrity, thus releasing solids that were originally embedded within that material. Nanocomposite materials consist of nanofillers embedded in a matrix of varying chemical composition, including for example cements and plastic polymers or…
Bartsch et al. [Phys. Rev. Lett. 104, 195901 (2010)] reported measurements of the diffusivities of different components of the multi-component bulk metallic glass Pd43Cu27Ni10P20. The diffusion of the largest Pd and the smallest P was found to be drastically different. The Stokes-Einstein relation breaks down when con…
We study the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in the presence of spin polarized two-dimensional Dirac fermions. We show that an externally applied spin polarization along the $z$ axis mediates an anisotropic interaction which corresponds to an $XXZ$ model interaction between two magnetic moments. For u…