Materials Literature
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We study metallic nano-particles for light trapping by investigating the optical absorption efficiency of the hydrogenated amorphous silicon thin film with and without metallic nano-particles on its top. The size and shape of these nano-particles are investigated as to their roles of light trapping: scattering light t…
Simple models of the quantum efficiency (QE) and emittance (εn,rms) of metals are based on the neglect of scattered electrons to the emission current. The leading order terms in the Fowler-Dubridge equation for QE and the Dowell-Schmerge equation for emittance entail QE∝εn4. Here, a method to account for next-order co…
Global warming is the urgent issue of our time, and the carbon dioxide is a greenhouse gas of the major concern. There are various research activities for carbon dioxide mitigation, such as CO2 recovery from the flue gas of industrial sites, underground and undersea CO2 storage, and also chemical/biological conversion…
A polyvinylpyrrolidone (PVP)-based fluorescent film with stable optical properties is successfully prepared in one pot without any additive. The reaction mechanism of ring-opening and self-crosslinking of linear PVP is proposed and demonstrated. The morphologies and the nanostructures of the fluorescent film as well a…
A series of four bisdithiazolyl radicals 1a-d (R(1) = Pr, Bu, Pn, Hx; R(2) = F) has been prepared and characterized by X-ray crystallography. The crystal structure of 1a (R(1) = Pr) belongs to the tetragonal space group P42(1)m and consists of slipped π-stack arrays of undimerized radicals packed about 4 centers runni…
In this report we present the initial results of the use of Ag nanoparticles (AgNPs)-coated silicon nanowire (SiNW) arrays for detection of organic molecules using the surface-enhanced Raman spectroscopy (SERS) effect. The SiNW arrays were prepared by metal-assisted chemical etching (MACE) and the AgNPs were deposited…
We demonstrate the formation of a ferromagnetic two-dimensional ${d}_{xy}$ electron sheet strictly confined to the TiO${}_{2}$ interface layer in LaAlO${}_{3}$/SrTiO${}_{3}$ heterostructures. Based on first-principles density functional calculations we show that the complex subband structure of the two-dimensional ele…
Abstract In this study, the deformation behavior of high density polyethylene (HDPE) and its nanocomposites under uniaxial static and dynamic compression loadings were experimentally investigated. The nanofillers used were carbon nanofibers (CNF) with surface treatments and pristine graphite nanoplatelets (GNP) respec…
Beta titanium alloys, Ti-15V-3Cr-3Al-3Sn, with minor additions of boron and carbon were prepared by consumable vacuum arc melting. Detailed microstructural characterizations were carried out using optical, scanning electron microscopes and transmission electron microscopes. Addition of boron resulted in refinement of…
Nanogels consist of three dimensionally cross-linked hydrophilic polymer chains and can thus be easily modified through functionalization of the polymeric building blocks, for example to yield stimuli-sensitive materials. For drug transport and intracellular release, redox-sensitive systems are especially of interest,…
Binary blends of poly(vinyl chloride) ( PVC ) with α‐methylstyrene‐acrylonitrile‐butadiene‐styrene copolymer ( AMS‐ABS ) were prepared via melt blending. A single glass transition temperature ( T g ) was observed by differential scanning calorimetry, thus indicating that PVC is miscible with the α‐methylstyrene‐acrylo…
The first example of donor-linked di(perylene bisimide)s is reported. UV-vis absorption spectra of these newly synthesized dyads showed intense absorption across the entire visible region, demonstrating their excellent light-harvesting activities. The severe fluorescence quenching event probed by steady-state fluoresc…
In this Article, we studied the surface immobilization of five organic-acid-modified atom-transfer radical polymerization (ATRP) initiators based on salicylic acid, catechol, phthalic acid, and m- and p-benzoic acid on alumina, and we also investigated the growth of hydrophilic poly(2-hydroxyethyl methacrylate) (PHEMA…
The inhibitive effect of Jeera (Cuminum cyminum) plant extracts on the corrosion of mild steel in an aqueous solution of seawater was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The stability of the inhibition efficiency of Jeera extracts was examined by…
This work advances bottom-up design of bioinspired materials built from peptide-amphiphiles, which are a class of bioconjugates in which a biofunctional peptide is covalently attached to a hydrophobic moiety that drives self-assembly in aqueous solution. Specifically, this work highlights the importance of peptide con…
Polymeric nanocomposites were reported to enhance the barrier properties and lifetime of organic solar cells. In this investigation, we are reporting the development of one such nanocomposites by dispersing the lithium zirconate (Li 2 ZrO 3 ) nanoparticles in polyvinyl alcohol (PVA) matrix. It was found that the incor…
The universal scaling between the average slow relaxation/transport and the average picosecond rattling motion inside the cage of the first neighbors has been evidenced in a variety of numerical simulations and experiments. Here, we first show that the scaling does not need information concerning the arbitrarily-defin…
In order to enhance the interfacial adhesion between wood fiber and an unsaturated polyester matrix ( UPE ), acrylic acid (acrylic acid)/poly(methyl methacrylate), and (acrylic acid)/silanization ( AAS ) were used to treat the wood fibers. The mechanical properties and the impact fracture surfaces of the prepared comp…
We studied the fluorescence spectra from single CdSe core-CdS/ZnS and CdS/CdZnS/ZnS shell colloidal quantum dots (QDs) (different shell thicknesses and different surface ligands) under different optical excitations. It was found that the single QD blinks (on and off) at low excitation and flickers (without distinguish…
This Letter reports elastic-driven internal yielding in strained ductile polymer glasses. After cold drawing of two different polymer glasses to neck at room temperature, we show that the samples display considerable retractive stress when warmed up above the storage temperature but still considerably below their glas…