Materials Literature
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The nanodynamics of ferroelectric ultrathin films made of PbTi(0.6)Zr(0.4)TiO(3) alloy is explored via the use of a first-principles-based technique. Our atomistic simulations predict that the nanostripe domains which constitute the ground state of ferroelectric ultrathin films under most electric boundary conditions…
Utilizing a hexadentate ligand platform, a series of trinuclear iron clusters (PhL)Fe3L*3 (PhLH6 = MeC(CH2NPh-o-NPh)3; L* = tetrahydrofuran (1), pyridine (2), PMePh2 (3)) has been prepared. The phenyl substituents on the ligand sterically prohibit strong iron–iron bonding from occurring but maintain a sufficiently clo…
TiO2 has been widely used to promote organic compounds degradation on waste aqueous solution, however, data on TiO2 nanotoxicity to aquatic life are still limited. In this in vitro study, we compare the toxicity of two different families of TiO2 nanoparticles on erythrocytes from Oncorhynchus mykiss trout. The crystal…
Gold(I)– and silver(I)–thiolate oligomers generated under nanoparticle growth conditions have been suggested to play an important role in the growth mechanism of thiolate-protected noble metal clusters. In this work, we explore the formation of isolated noble metal–glutathione complexes by complementing electrospray m…
In 0 nanoparticles with tunable size are obtained via NaBH 4 -induced reduction of InCl 3 ·4H 2 O in diethylene glycol. Citrate-capping allows nucleating almost monodisperse and non-agglomerated In 0 nanoparticles. Effective size tuning is possible in a wide range (10–100 nm) just by varying the concentration of NaBH…
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…