Materials Literature
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We observe optical third-harmonic generation in atomically thin films of MoS2 and deduce effective third-order nonlinear susceptibilities on the order of 10(-19) m(2)/V(2), which is comparable to that of commonly used semiconductors under resonant conditions. By measuring the susceptibility as a function of light wave…
Superhydrophobic and superoleophilic graphene/polyvinylidene fluoride (G/PVDF) aerogels were prepared by solvothermal reduction of the graphene oxide and PVDF mixed dispersions. The chemical reduction of the graphene oxide component was verified by FT-IR, XRD, XPS, Raman spectroscopy and TGA. The as-prepared aerogel s…
Na${}_{0.5}$Bi${}_{0.5}$TiO${}_{3}$ (NBT) and its derivatives have prompted a great surge in interest owing to their potential as lead-free piezoelectrics. In spite of five decades since its discovery, there is still a lack of clarity on crucial issues such as the origin of significant dielectric relaxation at room te…
The discovery of the organic metal TTF–TCNQ in 1973 led to an explosion of research conducted on organic charge-transfer complexes. While these materials have been studied intensely for several decades, the research was mostly aimed at the discovery of materials with high room-temperature conductivity or high-temperat…
Single layer MoS2 is an ideal material for the emerging field of "valleytronics" in which charge carrier momentum can be finely controlled by optical excitation. This system is also known to exhibit strong many-body interactions as observed by tightly bound excitons and trions. Here we report direct measurements of va…
A thin film of boron nitride (BN) is synthesized on an Si substrate using BCl3 and NH3 as source gases via thermal chemical vapor deposition. Cubic BN (c-BN) is preferentially synthesized when an Fe thin film is used as a catalyst. The dependences of the structural properties of the synthesized thin BN films upon the…
We studied the spiral spin state of LiCu2O2. Our calculation is based on the physical picture of classical spiral spins and their quantum fluctuation. Comparison with the spectra of the electron spin resonance (ESR) shows that the excitations come from the spin waves. If the magnetic field is applied along the b-axis…
This paper presents a novel technique for the simulation of a nano/micro-material system known as stiffness-based coarse-grained molecular dynamics (SB-CG-MD), which aims to extend the arena of conventional all-atom molecular dynamics (AA-MD) to a greater length and time scale while still capturing atomistic effects.…
In this article, a mathematical model that accounts for the kinetics of flocculation and coalescence of emulsion drops was developed to quantify the kinetics of emulsion stability. The model is similar to that developed by Borwankar et al. in 1992 with corrections in coalescence rate constant and collision efficiency…
Mesoporous silica nanospheres can be prepared by a facile route using a new class of eco-friendly template: trisiloxane-tailed ionic liquids. The organosilicone component of the ionic liquids template contributes to the reaction during the formation of mesoporous material, which leads to a firm skeleton of pores resul…
Zinc oxide (ZnO) nanostructures (rods, ellipsoids and flowers) were synthesized using a zinc precursor and L-lysine in aqueous medium at room temperature and/or at elevated temperature. The average thicknesses of different zinc oxide nanorods samples synthesized by this eco-friendly route are in the range of 109 to 29…
This paper observes an abnormal phenomenon in the frequency variation of wrinkled graphene. Compared with the pristine case, a slight wrinkle decreases the resonant frequency, while a heavy wrinkle increases the resonant frequency. This observation gave us the idea to tune the wrinkle and work out the frequency variat…
We have performed X-ray magnetic circular dichroism (XMCD) and X-ray absorption spectroscopy (XAS) measurements at pressures up to 17 GPa for the clathrate Eu8Ga16Ge30 (Curie temperature TC = 36 K). The temperature dependence of the XMCD spectra agrees well with that of the DC magnetization at ambient pressure. The TC…
Virtual front tracking cellular automaton modeling of isothermal β to α phase transformation with crystallography preferred orientation of TA15 alloy, Song, K J, Wei, Y H, Dong, Z B, Ma, R, Zhan, X H, Zheng, W J, Fang, K
Investigations into the formation of nanosized structures, particularly nanotubes, by a diamide ester compound are reported. Two aspects are concurrently examined: the role of the solvent and the role of the alkyl chain. The former is addressed by using a benzene derivative (o-xylene) and a totally saturated double ri…
Planar-coil supramolecular block copolymers fabricated from a cationic platinum(II) complex with sulfonate terminated polystyrenes can self-assemble into vesicles, which show further spontaneous fusion, with an hour-scale fusion time, in chloroform–methanol (v/v = 1) mixed solvents. The vesicle fusion intermediates, i…
Defibration conditions influence wood fiber characteristics and thereby properties of fiber-based materials. In this study, the effects of several defibration conditions on mechanical and physical properties of fiber-based wood-plastic composites (WPCs) are illustrated. Various WPCs were tested containing different th…
Composites were produced with functionalized carbon nanofibers (CNF) and polyimide (PI) matrix using either in situ polymerization or blending processes. The impact of the composite processing method, CNF surface chemistry, and fiber loadings on the dispersion of fibers and mechanical properties of composites were inv…
Peptide sequences, which exhibit a reversible pH-responsive coil to α-helix secondary structure transition, are conjugated to polymer precursors to yield linear AB and graft ABA peptide-poly(ethylene oxide) conjugates. While the PEO B-block is comparable, the conjugates differ in topologies of the peptide bearing A-bl…
Half-metallic ferromagnetic ordering in semiconductors, essential in the emerging field of spintronics for injection and transport of highly spin polarised currents, has up to now been considered mainly in III–V and II–VI materials. However, low Curie temperatures have limited implementation in room temperature device…