Materials Literature
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Thin-film based novel magnetic and electronic devices have entered a new era in which the film crystallography, structural coherence, and epitaxy play important roles in determining their functional properties. The capabilities of controlling such structural and functional properties are being continuously developed b…
We developed a novel double dopant bismuth oxide system with Tb and W. When Tb was doped as a single dopant, a Tb dopant concentration more than 20 mol% was required to stabilize bismuth oxides with a high conductivity cubic structure. High temperature XRD analysis of 25 mol% Tb-doped bismuth oxide (25TSB) confirmed t…
In this study, the adsorption morphologies as well as stability and transitions of a commercial dispersant copolymer (BYK 9076) on the surface of multiwalled carbon nanotubes (MWCNTs) were studied using Fourier transform infrared and UV-vis spectroscopy, dynamic light scattering, and electron microscopy techniques. Th…
An attempt was made to investigate the effect of the preparation temperature on the electrocapacitive performance of polypyrrole (PPY)/graphene oxide (GO) nanocomposites (PNCs). For this purpose, a series of PNCs were prepared at various temperatures by the cetyltrimethylammonium bromide-assisted dilute-solution polym…
Depth-sensitive magnetic, structural, and chemical characterization is important in the understanding and optimization of physical phenomena emerging at the interfaces of transition metal oxide heterostructures. In a simultaneous approach we have used polarized neutron and resonant x-ray reflectometry to determine the…
Sacrificial colloidal crystal templating of porous carbon films of tunable thickness is demonstrated using a facile thin-film assembly and hard-template-based nanoreplication process. Convectively assembled, colloidal crystal films composed of size-tunable silica nanoparticles (ca. 10-50 nm) serve as scalable sacrific…
Abstract Triphenylamine‐naphthobisthiadiazole‐based donor‐acceptor‐donor dyes were prepared and their aggregation and light‐emitting behaviors were investigated. Deep‐red light was emitted between 650–680 nm in a solution of tetrahydrofuran and dichloromethane with moderate fluorescent quantum yield of 0.36–0.48. Howe…
The functionalization of colloidal nanoparticles with short peptides often fails in achieving satisfactory targeting efficiency and selectivity toward receptor-specific human cells. Here, we show that an optimized passivation of gold nanoparticle surface with a mixed self-assembled monolayer, including a targeting lig…
The structural behavior of BiMnO3 under pressure was studied in a quantitative way by single-crystal synchrotron X-ray diffraction up to 36 GPa. Two phase transitions were observed at moderate pressures (1 and 6 GPa, respectively), leading the system at first to the P21/c and then to the Pnma symmetry. The breaking of…
2,7-TMPNO (4,5,9,10-tetramethoxypyrene-2,7-bis(tert-butylnitroxide)) was found to exist in semi-quinoid form with unprecedented strong intramolecular magnetic exchange interaction of 2 J/kB = 1185 K operating over a distance of 10 Å. Structural transformations with the activation energy of ΔEeq = 949 K were observed b…
The research presented in the paper is based on the idea of optimizing the processing and use of cosmetotextiles. The production of these materials involved:Use of a textile knitted support with 3D surface geometry (in order to create a massaging effect) made of bamboo yarns (for improved comfort characteristics).Func…
In recent years, spontaneous emission modulation of emitters in photonic crystals (PCs) has been widely reported. However, the modulation of PCs on upconversion (UC) white light emission has been rarely studied. In this Letter, triply doped PMMA/NaYF(4):Yb(3+), Er(3+), Tm(3+) composite photonic crystals were successfu…
We doped graphene in situ during synthesis from methane and ammonia on copper in a low-pressure chemical vapour deposition system, and investigated the effect of the synthesis temperature and ammonia concentration on the growth. Raman and X-ray photoelectron spectroscopy was used to investigate the quality and nitroge…
We study the electronic state of the organic conductor α-(BEDT-TSeF)2I3 (BETS) in which a zero-gap state (ZGS) of massless Dirac fermions is expected under pressure. A transition from an insulating state to a ZGS is investigated using an extended Hubbard model with seven kinds of transfer energy between the four molec…
CuGaSe2 is an important non-layered I-III-VI2 compound with superior optical properties. In this work, monocrystal two-dimensional (2D) CuGaSe2 nanosheets were successfully synthesized via a simple solid-state reaction. The electronic and optoelectronic properties of photodetectors based on 2D CuGaSe2 nanosheets were…
We demonstrate that argon ion bombardment of single crystal sapphire leads to the creation of substrates that support the growth of vertically aligned carbon nanotubes from iron catalysts with a density, height, and quality equivalent to those grown on conventional, disordered alumina supports. We quantify the evoluti…
Mesoporous silica nanoparticles (MSNs) are promising for drug delivery and other biomedical applications owing to their excellent chemical stability and biocompatibility. For these applications, a hollow morphology with thin shell and open mesopores is preferred for MSNs in order to maximize the loading capacity of dr…
The spray-pyrolysis of borazine at 1400 °C under nitrogen generates boron nitride (BN) nanoparticles (NPs). The as-prepared samples form elementary blocks containing slightly agglomerated NPs with sizes ranging from 55 to 120 nm, a Brunauer-Emmett-Teller (BET)-specific surface area of 34.6 m2 g−1 and a helium density…
Thermal rectification occurs when heat current through a material is favored in one direction but not in the opposite direction. These materials, often called thermal diodes, have the potential to perform logic calculations with phonons. Rectification obtained with existing material systems is either too minor or too…
The study of the transport and noise properties of graphene‐based devices requires the computation of the potential profile as a function of the applied bias voltages. However, an exact solution for the potential profile involves a complete self‐consistent treatment of the electrostatic and transport equations, which…