Materials Literature
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We investigate the ultrafast dynamics of the photoinduced electron transfer between surface-adsorbed indoline D149 dye and porous ZnO as used in the working electrodes of dye-sensitized solar cells. Transient absorption spectroscopy was conducted on the dye in solution, on solid state samples and for the latter in con…
Poly(3-hexylthiophene) (P3HT) nanofibers (NF) displaying J-aggregate exciton coupling behavior are encapsulated with the amphiphilic block copolymer (BCP), poly(3-hexyl-thiophene)-block-poly(ethylene-glycol), (PHT(20)-b-PEG(108)). Encapsulation results in the formation of hierarchical superstructures, and the BCP coat…
Abstract Monte Carlo simulation is used to study the magnetic properties and critical behaviour of a molecular-based magnetic film AFeIIFeIII(C2O4)3(A = N(n − C n H2n+1)4, n = 3–5). The effects of surface exchange coupling, surface single-ion anisotropy and layer thickness on the compensation temperature and critical…
The purpose of this article is to synthesize poly(hydroxyethyl methacrylate-N-methacryloyl-(L)-tryptophan) [mPHEMATrp] magnetic nanoparticles for lysozyme purification from chicken egg white. mPHEMATrp nanoparticles (38 nm in diameter) were synthesized by surfactant-free emulsion polymerization. Specific surface area…
Abstract Deposition techniques that can uniformly and conformally coat deep trenches and very high aspect ratio pores with uniform thickness films are valuable in the synthesis of complex three‐dimensionally structured materials. Here it is shown that high pressure chemical vapor deposition can be used to deposit conf…
We have developed a label-free, simple and highly sensitive hairpin fluorescent biosensor for the assay of DNA 3′-phosphatases and their inhibitors utilizing a graphene oxide (GO) platform. In this assay, we designed a hairpin primer (HP) with a 3′-phosphoryl end that served as the substrate for DNA 3′-phosphatases. O…
The low-temperature specific heat, magnetic susceptibility, and thermal expansion are studied experimentally in the fcc boride HoB66 and compared to similar quantities in non-magnetic LuB66. The anomalous behaviour observed in HoB66 is explained within a glass-like picture together with magnetic subsystem ordering pro…
Abstract In this work, we review current trends in China to investigate beam plasma interaction phenomena. Recent progresses in China on low energy heavy ions and plasma interaction, ion beam-plasma interactions under the influences of magnetic fields, high energy heavy ion radiography through marginal range method, e…
Adipose-derived stem cells (ASCs) have the ability to release multiple growth factors in response to hypoxia. In this study, we investigated the potential of ASCs to prevent tissue ischemia. We found conditioned media from hypoxic ASCs had increased levels of vascular endothelial growth factor (VEGF) and enhanced endo…
Stable multilayer films with cucurbit[8]uril have been fabricated on the basis of the alternating layer-by-layer assembly of a novel side-chain pseudopolyrotaxane and a photoreactive polyanion. The as-prepared multilayer films exhibit good properties as surface-imprinted multilayers, because cucurbit[8]uril molecules…
We report the synthesis, structure, and electrophosphorescence properties of a series of heteroleptic iridium(III) complexes with various cyclometalated (C⁁N) ligands based on the sterically demanding guanidinate ancillary ligand. The iridium(III) complexes contain two cyclometalated (C⁁N) ligands and one monoanionic…
Applications of one-dimensional (1D) semiconductor nanostructures in nanoelectronics and nano-optoelectronics rely on the ability to rationally tune their electrical transport properties. Here we report the synthesis of single-crystalline Ag-doped ZnSe nanowires (NWs) by using silver sulfide (Ag2S) as the p-type dopan…
For InAs/GaAs(001) quantum dot (QD) system, the wetting layer (WL) evolution and its temperature dependence were studied using reflectance difference spectroscopy and were analyzed with a rate equation model. WL thicknesses showed a monotonic increase at relatively low growth temperatures but showed an initial increas…
Eosin Y (EY) is a fluorescein derivative dye that can be reduced by accepting either one or two electrons. The one- or two-electron reduction potentials have comparable values. The two-electron reduction pathway dominates when sodium borohydride is used, whereas the reduction pathway changes to a one-electron reductio…
Cell adhesion, morphology and growth are influenced by surface topography at nano and micrometer scales. Nano-textured surfaces are prepared using photolithography, plasma etching and long polymer chemical etching which are cost prohibitive and require specialized equipment. This article demonstrates a simple approach…
Here, we report the formation of high density arrays of Cu 15 Si 4 nanowires using a high boiling point organic solvent based method. The reactions were carried out using Cu foil substrates as the Cu source with nanowire growth dependent upon the prior formation of Cu 15 Si 4 crystallites on the surface. The method sh…
Executive Director, Radiation Safety Chief Radiation Safety Officer, Columbia University 722 W. 168th St, 4th Floor, MC 70 New York, NY, 10032 [email protected] The author declares no conflict of interest.
Visible light-active, nano-grained CeO2 sheets are successfully synthesized using polydopamine-induced CaCO3 vaterite microspheres. The nano-grained CeO2 sheets exhibited a distinct polycrystalline sheet-like structure with grains, with a red-shift in the UV-visible absorption spectrum and a much narrower bandgap (2.7…
A simple and rapid room-temperature aerosol deposition method was used to fabricate TiO(2) films for photokilling/photdegradation applications. TiO(2) particles were accelerated to supersonic speeds and fractured upon impacting a glass substrate to form a functional thin film, a process known as aerosol deposition. Af…
Abstract During the continuous casting of low‐carbon Nb–Ti microalloyed steel, control of the slab surface microstructure and the behavior of the second‐phase precipitation are significantly influenced by the cooling rate. Through confocal laser scanning microscopy, the effect of the cooling rate on the behavior of fe…