Materials Literature
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We report the results of our first-principles calculations of structural stability, mechanical, magnetic, and thermodynamic properties for γ-M(23)C(6) (M = Fe, Cr) compounds with each of the four metal Wyckoff sites being occupied in turn by Fe. The thermodynamic properties and the temperature dependence of the mechan…
Determining the major noise sources in nanoscale field-effect transistor (nanoFET) biosensors is critical for improving bioelectronic interfaces. We use the carbon nanotube (CNT) FET biosensor platform to examine the noise generated by substrate interactions and surface adsorbates, both of which are present in current…
In this article, luminescent properties of gold nanoclusters (AuNCs) were studied at the single nanoparticle level and also used as novel imaging agents in cell media. Two types of water-soluble AuNCs which were stabilized with a monolayer composed of either mercaptosuccinic acid (MSA) or tiopronin thiolate ligands we…
Hydrogen storage properties and mechanisms of the Ca(BH(4))(2)-doped Mg(NH(2))(2)-2LiH system are systematically investigated. It is found that a metathesis reaction between Ca(BH(4))(2) and LiH readily occurs to yield CaH(2) and LiBH(4) during ball milling. The Mg(NH(2))(2) -2LiH-0.1Ca(BH(4))(2) composite exhibits op…
The alignment of vacancy loops and voids along basal planes observed in irradiated Zr and Zr alloys requires anisotropic point-defect transport with a dominant contribution along the basal plane. For neutron irradiation, this can be explained by one-dimensional mobility of self-interstitial atom (SIA) clusters, but ex…
Fluorescent gold clusters (FGCs) with tunable emission from blue to red and quantum yields in the range of 6-17% have been synthesized by simple modification of the conditions used for the synthesis of gold nanoparticles, namely by replacing the stronger reducing agent with a controlled amount of thiol. Various functi…
In ( HfMg ) 0.5 Mo 3 O 12 , which can be considered as a 1:1 mole ratio solid solution of the low‐positive thermal expansion material HfMgMo 3 O 12 and the low‐negative thermal expansion (NTE) material In 2 Mo 3 O 12 was prepared. From DSC and XRPD results, we show that In ( HfMg ) 0.5 Mo 3 O 12 exists in a monoclinic…
The present work deals with the synthesis and photophysical, quantum mechanical, and lasing characterization of novel BODIPYs bearing amino and nitro groups at different positions in the core. The results emphasize the relevant role on the photophysical and lasing properties, not only of the attached functionality but…
The excited-state dynamics of two triads consisting of a naphthalenediimide (cNDI) substituted at the core by two zinc (ZnP) or free-base tetraphenylporphyrins (FbP) was investigated by ultrafast fluorescence and transient absorption spectroscopy. The electronic absorption spectra of the triads are almost the composit…
We show that hard spheres confined between two parallel hard plates pack denser with periodic adaptive prismatic structures which are composed of alternating prisms of spheres. The internal structure of the prisms adapts to the slit height which results in close packings for a range of plate separations, just above th…
In this paper, we are reporting a one step hydrothermal approach to the synthesis of graphene nanosheets via reduction of graphene oxide (GO). The obtained graphene nanosheets are characterized using X-ray diffraction (XRD), UV-vis spectroscopy, Transmission electron microscope (TEM), X-ray photoelectron (XPS) and Ram…
Protein-based hydrogels are promising materials for tissue engineering and drug delivery due to the unique properties of proteins such as perfect polydispersity, exact control over monomer sequence, ability to fine-tune molecular-level biochemical interactions, etc. This tutorial review summarizes recent progress on t…
We study the dielectric properties of graphene in the presence of Rashba and intrinsic spin-orbit interactions in their most general form, i.e., for arbitrary frequency, wave vector, doping, and spin-orbit coupling (SOC) parameters. The main result consists in the derivation of closed analytical expressions for the im…
Electron-phonon coupling plays a key role in a variety of elemental excitations and their interactions in semiconductor nanostructures. Here we demonstrate that the relaxation rate of free excitons in a single ZnTe nanobelt (NB) is considerably enhanced via a nonthermalized hot-exciton emission process as a result of…
A response surface methodology (RSM) involving a central composite design was applied to the modelling and optimization of a preparation of Mn/active carbon nanocatalysts in NH3-SCR of NO at 250 degrees C and the results were compared with the artificial neural network (ANN) predicted values. The catalyst preparation…
Cooperativity is the key for mild catalytic epoxidation: the immobilization of fluoroalcohols on dendritic polyglycerol (by "click chemistry") provides organocatalysts that can form multiple hydrogen bonds. The epoxidation of alkenes with aqueous hydrogen peroxide proceeds efficiently in the presence of dendritic fluo…
Alumina is a key material to activate catalyisis of carbon nanotube growth. Although alumina is known to prevent aggregation of metal nanoparticles and to promote vertically aligned carbon nanotube growth, details of the interaction of alumina with metal are still unclear. We investigated how alumina functions to acti…
Nanoparticles as antimicrobial agents are a novel field in nanomedicine and nanobiotechnology. Unlike many investigations about antimicrobial effects of silver nanoparticles, few experiments have been conducted about the impact of iron-oxide nanoparticles on microorganisms. In the current paper, we have synthesized an…
We report the use of organometallic precursors in microwave and microfluidic reactors to synthesize Ni nanoparticles of various shapes: spheres, cubes, trigonal pyramids and tetrapods. Each route has the ability to yield a preferential shape based on kinetic control of crystal growth. Tetrapods are obtained only in a…
Theoretical and experimental approaches were employed to study the effect of aggregation on the affinity between nanoparticles (NPs) and a flat surface that is quantified by the attachment efficiency. Computer simulations were used to generate virtual aggregates formed via either diffusion limited cluster aggregation…