Materials Literature
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Zinc oxide (ZnO) thin films were deposited by chemical spray pyrolysis (CSP) technique using zinc acetate dihydrate solutions on microscopic glass substrates by varying the precursor concentration. The prepared films were characterized structurally and optically, using the powder X-ray diffraction (XRD) and UV analysi…
The crystal structure of an isotropic, single phase, Ti-rich schorlomite garnet, ideally Ca 3 Ti 4+ 2 (Fe 3+ 2 Si)O 12 , from Magnet Cove, Arkansas was refined with the Rietveld method, space group $Ia\overline 3 d$ , and monochromatic synchrotron high-resolution powder X-ray diffraction data. Electron-microprobe anal…
Semicarbazides of p-substituted benzoic acids are a class of simple molecules endowed with H-bonding donor and acceptor groups capable of forming H-bonded rows along three linearly independent directions (orthogonal H-bonding synthons). When the acceptor group at the para position is strong (–NO2, –CN, –N) the same cr…
Manganites have been known to exhibit giant anisotropic magnetoresistance (GAMR) near metal-insulator transition temperatures. Interestingly, we observed a second GAMR peak at lower temperatures in manganite strips fabricated from epitaxial thin films. The second low-temperature GAMR peak is highly sensitive to magnet…
Anisotropy of piezoelectric and magnetostrictive materials is considered in order to determine the ideal directions and orientation relationships for which the maximum magnetoelectric response may be observed in a composite or heterostructure of these constituent materials. A formalism for the magnetoelectric effect i…
Color centers in diamond are becoming prime candidates for applications in photonics and sensing. In this work we study the time evolution of cathodoluminescence (CL) emissions from color centers in a polycrystalline diamond film under electron irradiation. We demonstrate room-temperature activation of several lumines…
The precursors of RNP29 and Ferredoxin (Fd2) were previously identified in the cytosol of ppi2 plant cells with their N-terminal amino acid acetylated. Here, we explore whether precursor accumulation in ppi2 is characteristic for Toc159 client proteins, by characterizing the import properties of the RNP29 precursor in…
ABSTRACT Salicin was modified to monoacetals and diacetals with bromoester groups (fBr = 4 and 6) initiating atom transfer radical polymerization (ATRP). These glucoinitiators were used to synthesize 4‐ and 6‐arm star copolymers of tert‐butyl methacrylate (tBMA) and methyl methacrylate (MMA) with different arm polymer…
ZrB2–WSi2 ceramics with platelet shaped ZrB2 grains were fabricated via reactive hot pressing by the reaction of Zr, B, W and Si. Hot forging was then used to form a textured microstructure in the ceramics. The ceramics obtained by reactive hot pressing demonstrated higher flexural strength than the corresponding ZrB2…
We have observed the enhancement in photoluminescence (PL) intensity of the antiferroelectric liquid crystals (AFLC) doped with Sodium titanate nanoparticles (NPs). The enhancement in PL intensity of AFLC strongly depends on the doping concentration of NPs. The Sodium titanate NPs were prepared such that the emission…
We report the bi-epitaxial growth of ZnO and resistance switching characteristics of Pt/ZnO/TiN-based heterojunction devices fabricated on Si(001) substrates by pulsed laser deposition. The structural properties of the heterostructures characterized by XRD (θ-2θ, φ scans) and TEM confirm that the ZnO films having hexa…
Photoelectrochemical (PEC) etching is a rapid and inexpensive means of etching GaN, InGaN, and related materials for micro-electro-mechanical systems (MEMS) applications. In this work, we show that bandgap engineering of GaN/InGaN heterostructures can be used to exert substantial control over PEC etching and achieve s…
In aero engines, the oil and air interaction within bearing chambers creates a complex two-phase flow. Since most aero engines use a close-loop oil system and releasing oil out is not acceptable, oil-air separation is essential. The oil originates from the engine transmission, the majority of which is scavenged out fr…
Currently, the most widely used photoresists in optical lithography are organic-based resists. The major limitations of such resists include the photon accumulation severely affects the quality of photolithography patterns and the size of the pattern is constrained by the diffraction limit. Phase-change lithography, w…
The stress state and crystal quality of a metal–organic chemical vapor deposition (MOCVD)-grown GaN film on a Si(111) substrate with different AlN buffer layer thicknesses were investigated. The properties of the AlN layers with varying thicknesses were studied. The three-dimensional growth mode with a rough surface o…
Control over the orientation of cylindrical block copolymer microdomains and the position of dislocations using tapered nanochannels is herein demonstrated. Dislocations are introduced periodically as the channels become progressively wider. Our high-temperature atomic force microscopy (AFM) enables us to probe real-t…
We report intrinsic carrier mobility calculations of a two-dimensional nanostructure that consists of porous single layer graphene covalently bonded with single-walled carbon nanotubes on both sides. We used first-principles calculation and found that the deformation potential of such system is about 25% of that of gr…
Metamaterial perfect absorber (MPA) promises many applications due to its capability of complete suppression of transmission or/and reflection. The complete dissipation of the incident electromagnetic energy by the absorptive meta-atoms makes it a unique candidate in many photonic and optoelectronic devices. An ultrat…
Abstract Benzothieno[3,2‐b]benzothiophene (BTBT) is an excellent organic transistor material, and its charge‐transfer salt (BTBT)2PF6 is an organic metal that exhibits conductivity as high as 1500 S cm–1 at room temperature. Here, we report a charge‐transfer salt of the selenium analogue, benzoseleno[3,2‐b]benzoseleno…
Reactions of Ph2SbCl3 with RSi(OH)3 [where R = tert-Bu, cyclo-C6H11] and Ph2Si(OH)2 in toluene in the presence of triethylamine as a base were performed. Single-crystal X-ray structural elucidation of the products revealed the formation of hexanuclear antimony(V) and mixed-valent antimony (III/V) oxo-hydroxo clusters…