Materials Literature
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We have employed atomistic simulation techniques to investigate the thermodynamics of mixing in the solid solutions of calcite (CaCO(3)) and rhodochrosite (MnCO(3)). Our calculations show that the fully disordered solid solution has positive enthalpies of mixing for the entire range of compositions, which confirm rece…
Sticky stuff: The novel composite nanofibrous scaffolds based on mussel adhesive proteins (MAPs) provide a mechanically durable structural backbone with the function of bioactive peptides. It can also be easily coated with a variety of biomolecules. This biofunctionalized nanofiber platform could be a promising tool f…
Transformation optics has led the way in the development of electromagnetic invisibility cloaks from science fiction to engineering practice. Invisibility cloaks have been demonstrated over a wide range of the electromagnetic spectrum, and with a variety of different fabrication techniques. However, all previous schem…
A comprehensive study is presented on the short-time dynamics in suspensions of charged colloidal spheres. The explored parameter space covers the major part of the fluid-state regime, with colloid concentrations extending up to the freezing transition. The particles are assumed to interact directly by a hard-core plu…
In this paper, we report an improved transfer of graphene by directly picking up the graphene with target substrates and the comparison of such transferred graphene samples with other graphene samples transferred by the commonly used "PMMA-based transfer" method. Raman spectroscopy studies show that this "direct trans…
In the bacterium Salmonella enterica, the CobB sirtuin protein deacetylase and the Gcn5-related N(ε)-acetyltransferase (GNAT) Pat control carbon utilization and metabolic flux via N(ε)-lysine acetylation/deacetylation of metabolic enzymes. To date, the S. enterica Pat (SePat) acetyltransferase has not been biochemical…
A sol–gel-assisted combustion method was used to prepare Fe-doped manganese oxide octahedral molecular sieve (Fe-KOMS-2) materials with the cryptomelane structure. Characterization of the nanopowder samples over a wide range of Fe-doping levels (0 ≤ Fe/Mn ≤ 1/2) was carried out using a variety of experimental techniqu…
The grain size dependence of creep is critical to understand the plastic deformation mechanism of nanoscale metals. Here we used molecular dynamics to study the stress-induced grain size exponent transition in creep of nanocrystalline copper. The grain size exponent was found to initially increase with increasing stre…
Nanoporous gold material exhibits a catalytic activity on the benzannulation reaction between ortho-alkynylbenzaldehydes and alkynes. The catalyst is easily recoverable and can be reused several times without leaching and loss of activity.
Phase-change memory elements with 25-nm Ge2Sb2Te5thickness and 25-nm heater diameter with ±2-nm protrusion/recess of the heater are studied using 2-D finite-element simulations with rotational symmetry. Temperature-dependent material parameters are used to solve current continuity and heat equations self-consistently.…
Titanium dioxide nanomaterials (nano-TiO(2) ) exhibit stronger photochemical oxidation/reduction capacity compared with their bulk counterparts, but the effectiveness of nano-TiO(2) interaction with ultraviolet (UV) light strongly depends on particle size. In this study, the dependence of nano-TiO(2) toxicity on parti…
Anodic aluminum oxide has unique and highly attractive properties, including self-ordering of porous structure during anodization. Although anodization regimes leading to formation of highly ordered porous structures had been found experimentally, many aspects of the self-organization mechanism remain unsolved. Here,…
Abstract Single‐molecule detection by surface‐enhanced resonance Raman scattering (SERRS) spectroscopy has been demonstrated for a variety of molecules. The detection of single molecules that do not have a resonance contribution, SERS, has been shown in the case of adenine. However, when colloidal particles isolated o…
A high quality single crystal of K3B6O10Cl with dimensions up to 25 × 11 × 7 mm3 was successfully grown by the top-seeded solution growth method for the first time. Morphological analysis reveals that the growth of the crystal is anisotropic. By the minimum deviation technique, the refractive indices of the crystal we…
This paper presents a compact physics-based model of the drain current, charge, and capacitance of graphene field-effect transistors, which is of relevance for the exploration of dc, ac, and transient behavior of graphene-based circuits. The physical framework is a field-effect model and drift-diffusion carrier transp…
The very high brightness and photostability of silica nanoparticles (NPs) encapsulating organic fluorophores have been demonstrated recently and have opened up new exciting opportunities for a number of biotechnological and information technological applications. However, a systematic theoretical study of fluorescent…
Synthesis of monodisperse metal nitride and oxynitride nanoparticles with a controllable chemical composition, size, and a well-defined morphology are useful for applications in fields of catalysis, optoelectronics, and electrochemistry. In this paper a novel method for the controllable synthesis of highly crystalline…
We have combined analytical theory with ab initio nonadiabatic molecular dynamics to study the phonon-induced relaxation of photoexcited charge carriers in PbSe and CdSe semiconductor quantum dots (QDs). Density functional theory calculations show dense distributions of electronic levels near the energy gap, attribute…
Abstract This article is concerned with understanding the behavior of polyethylene terephthalate (PET) in the injection stretch blow molding (ISBM) process where it is typically biaxially stretched to form bottles for the packaging industry. A comprehensive experimental study was undertaken, analyzing the behavior of…
Current treatment modalities for soft tissue augmentation which use autologous grafting and commercially available fillers present a number of challenges and limitations, such as donor site morbidity and volume loss over time. Adipose tissue engineering technology may provide an attractive alternative. This study inve…