Materials Literature
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Ab initio molecular dynamics simulations have been carried out to study low energy recoil events in SrTiO3. The threshold displacement energies are shown to be strongly dependent on both the orientation and the corresponding atomic arrangement. The minimum threshold displacement energies are 13 eV for an O recoil alon…
Co-doping of sol-gel processed SiO2 thin films with Er3+ ions and In2O3 nanocrystals produced a 100-fold enhancement of Er3+-related 1.54 μm emission compared to films doped only with Er3+. Quantitative studies of temperature-dependent photoluminescence spectra show that this dopant-concentration-dependent luminescenc…
We report chemical vapor-deposited (CVD) graphene field-effect transistors (GFETs) on conventional SiO2/Si substrate with high-performance comparable to GFETs on boron nitride under practical ambient conditions. The fabricated GFET statistics reveal maximum carrier mobility of ∼17 800 cm2/V-s. Intrinsic graphene featu…
Nanotwinned metals received significant interest lately as twin boundaries may enable simultaneous enhancement of strength, ductility, thermal stability, and radiation tolerance. However, nanotwins have been the privilege of metals with low-to-intermediate stacking fault energy (SFE). Recent scattered studies show tha…
On the basis of the concept that the design of a mixed valence system is a key route to create electronic conducting frameworks, we propose a unique idea to rationally produce mixed valency in an ionic donor/acceptor chain (i.e., D(+)A(-) chain). The doping of a redox-inert (insulator) dopant (P) into a D(+)A(-) chain…
Nanoparticles of multiferroic YCrO3 synthesized using the droplet confinement of miniemulsions show unusual features in the magnetic properties at low temperatures, which have not been reported before. Below 10 K, there is a sudden increase in the magnetization, and the nature of M–H hysteresis loops changes appreciab…
A unimolecular micelle-like nanocarrier (PPDP) based on poly(amidoamine) (PAMAM) dendrimers was synthesized to develop combined drug delivery systems for intensifying the therapeutic effect on tumors. The carrier was designed as a dual drug container with oligo-poly(ε-caprolactone) (PCL) and PEGylated amidoamine dendr…
In order to enhance the permittivity and tunability of the dielectric component, a thin film dielectric composite consisting of a radio frequency sputtered SrTiO3 (STO) buffer layer and metalorganic solution deposited Mg-doped BaxSr1−xTiO3 (Mg-BST) thin film overgrowth was developed using affordable industry standard…
We generalize to higher spatial dimensions the Stokes-Einstein relation (SER) as well as the leading correction to diffusivity in finite systems with periodic boundary conditions, and validate these results with numerical simulations. We then investigate the evolution of the high-density SER violation with dimension i…
Spider silks combine a significant number of desirable characteristics in one material, including large tensile strength and strain at breaking, biocompatibility, and the possibility of tailoring their properties. Major ampullate gland silk (MAS) is the most studied silk and their properties are explained by a double…
A differential geometric description of crystals with continuous distributions of lattice defects and undergoing potentially large deformations is presented. This description is specialized to describe discrete defects, i.e., singular defect distributions. Three isolated defects are considered in detail: the screw dis…
The properties of cellulose/polypropylene (PP) nanocomposites with n-octadecyl-modified bagasse nanofibers (MBNF) were compared to those with maleated polypropylene (MAPP) coupling agent. The nanocomposites were prepared by twin-screw extrusion with bagasse nanofiber (BNF) content varying from 2.5 to 10 wt%. The compr…
Ba0.9Ca0.1Ti1−xZrxO3 (x = 0.05, 0.07 and 0.10; BCTZ5, BCTZ7, BCTZ10) lead free ceramics were prepared by solid state reaction. The phase transitional behaviour, composition, and temperature dependent electrical properties and composition dependent ferroelectric properties were investigated. XRD analysis at room temper…
Monocarbaporphyrins, dicarbaporphyrins, tricarbaporphyrins, and quatyrins can all potentially exist in a number of tautomeric forms, but little is known about these species. In addition, no examples of tricarbaporphyrins or quatyrins are known at this time. In order to get information on the relative stabilities of ca…
Nature uses a variety of strategies to tune wetting behavior for biological applications. By artificially mimicking these strategies, a variety of different wetting conditions can be achieved. Numerous examples exist of designed surfaces that can mimic the wetting behavior of lotus leaves or rose petals, but few surfa…
We report low-temperature transport spectroscopy of a graphene quantum dot fabricated by atomic force microscope nanolithography. The excellent spatial resolution of the atomic force microscope allows us to reliably fabricate quantum dots with short constrictions of less than 15 nm in length. Transport measurements de…
Fe doped multi-walled carbon nanotubes (MWCNTs)/epoxy composites were fabricated for the investigation of electromagnetic interference (EMI) shielding. Compared with the pristine MWCNTs, a small amount of Fe doping into the MWCNTs can substantially improve the EMI shielding effectiveness (SE) of MWCNTs/epoxy composite…
Amorphous thermal stability of Al-doped Sb2Te3 films was investigated by high-temperature X-ray diffraction from room temperature to 350 °C, showing the structural evolution step by step from amorphous to crystalline phases. The films' crystallization temperatures were elevated from 124 °C to 244 °C with increasing Al…
Based on an orientation-dependent dislocation line energy, a solution to the acoustic nonlinearity parameter is obtained for pure and mixed dislocations in anisotropic crystals. The solution is validated by comparison with molecular dynamic simulations. Parametric studies using this new solution show that (i) elastic…
We propose a liquid crystal (LC) micro-lens array with the structure of two-divided and tetragonally hole-patterned electrodes. Each LC cell in the lens array behaves like cylindrical or spherical lens properties by electrically adjusting the applied voltages. The LC micro-lens array is useful for tuning optical prope…