Materials Literature
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In-situ synchrotron-based photoemission spectroscopy, low-temperature scanning tunneling microscopy and Raman spectroscopy are used to investigate the interface properties of graphene on both the (0001) and (0001) 6H-SiC (Si- and C-terminated surfaces). We clearly observe the upward band-bending upon the formation of…
BACKGROUND: Lesion-to-brain contrast after gadolinium administration is significantly higher at 3.0 Tesla (T) compared to 1.5 T. The high in vivo relaxivity of gadobenate dimeglumine (Gd-BOPTA) may permit the use of lower-dose contrast agents. PURPOSE: To investigate whether low-dose contrast-enhanced MRI at 3.0 T usi…
Abstract A modified cellulose material was prepared by grafting glycidyl methacrylate to cellulose (Cell‐ g ‐GMA) with subsequent functionalization with imidazole (Cell‐ g ‐GMA‐imidazole). This latter compound was used in the adsorption of copper from aqueous solution. The mechanism of Cu(II) binding onto the cell‐ g…
Frank–Read sources are among the most important mechanisms of dislocation multiplication, and their operation signals the onset of yield in crystals. We show that the critical stress required to initiate dislocation production falls dramatically at high-elastic anisotropy, irrespective of the mean shear modulus. We he…
Biodegradable polymers are of interest for developing controlled protein drug delivery platforms. In this study, two poly (alpha-hydroxy) esters were formulated with Aerosol-OT, a surfactant stabilizer, to encapsulate the protein keratinocyte growth factor (KGF) for controlled release KGF is involved in a number of cr…
Abstract A novel cationic dyeable copolyester (MCDP) containing purified terephthalate acid (PTA), ethylene glycol (EG), 2‐methyl‐1,3‐propanediol (MPD), and sodium‐5‐sulfo‐isophthalate (SIP) was synthesized via direct esterification method. The chemical structure of modified cationic dyeable polyester (MCPD) was confi…
Understanding gas adsorption confined in nanoscale pores is a fundamental issue with broad applications in catalysis and gas storage. Recently, hysteretic H(2) adsorption was observed in several nanoporous metal-organic frameworks (MOFs). Here, using first-principles calculations and simulated adsorption/desorption is…
Reactions of laser-ablated iron atoms with dinitrogen in excess neon produce the iron dinitrogen complexes Fe(N(2)), Fe(NN)(x) (x = 1-5), and Fe(NN)(3)(-) through capture of the ablated electron. The reaction products are characterized on the basis of isotopic shifts, mixed isotopic splitting patterns, stepwise anneal…
A variety of two-dimensional (2D) superhydrophobic surfaces have been fabricated for biological and industrial applications. Here, we report a simple and inexpensive non-planar (i.e. three-dimensional, 3D) superhydrophobic structure with nanofiber entanglements. The 3D structure with the contact angle of about 170° is…
In this paper, we investigate the performance potentials of silicon nanowire (SNW) and semiconducting graphene nanoribbon (GNR) MOSFETs by using first-principles bandstructures and ballistic current estimation based on the ¿top-of-the-barrier¿ model. As a result, we found that SNW-MOSFETs display a strong orientation…
This paper reports experimental study on the hardness and wear behavior of NiTi Thin Film Shape Memory Alloy (SMA) at micrometer scales. A triboindenter (Hysitron Inc., Minneapolis, USA) was used to conduct a series of indentations under various loads (the corresponding maximum indentation depth from 18.52nm to 333.53…
Modified indium tin oxide (ITO) electrodes are prepared by depositing monolayers containing porphyrin–viologen linked compounds with various length spacer chains [ZnP( n )V ( n = 4,6,8)] and arachidic acid (1:10) using the Langmuir–Blodgett method. The electrochemical properties of the ZnP( n )V ( n = 4,6,8)-modified…
A super-resolution imaging method for the deep sub-wavelength structure has been proposed, which is achieved by controlling the propagating direction of the evanescent components of the incident field through a one-dimensional metamaterial structure (ODMS) with an anisotropic dielectric permittivity. We provide the me…
We investigated the effects of poly(lactic-co-glycolic acid) (PLGA) degradability on the apatite-forming ability of electrospun PLGA/SiO(2)-CaO gel composite fabric. Two PLGA copolymer compositions with low and high degradability were used in experiments. A nonwoven polymer/ceramic composite fabric composed of randoml…
The interplay between physical gelation and equilibrium phase transitions in asymmetric binary mixtures is analyzed from the effective fluid approach, in which the big particles interact via a short-range effective attraction beyond the core due to the depletion mechanism. The question of the universality of the scena…
The diffusion behavior of the conjugated polyelectrolyte poly{[9,9-bis(6′- N, N, N -trimethylammonium)hexyl]fluorene-phenylene} bromide (HTMA-PFP) with different molecular weights has been studied in dimethyl sulfoxide (DMSO) + water solutions. Samples of HTMA-PFP with various molecular weights were obtained by synthe…
Abstract Cold oxygen plasma was employed to give hydrophilicity modification to polypropylene (PP) nonwoven fabric (NWF). It was found that, after plasma treatment, PP NWF made from fibers with smooth surfaces can only keep its hydrophilicity for a short time and then shows a quick hydrophobic recovery at room tempera…
Monometallic, bimetallic and trimetallic particles consisting of different weight compositions of Pt-Pd-Rh over pure alumina wash coats have been synthesized and their catalytic performance on methane conversion was studied from 150 to <TEX>$600^{\circ}C$</TEX>. Different catalyst formulations with variable Pt, Pd and…
Fabrication of Self-Ordered Nanoporous Alumina with 69–115 nm Interpore Distances in Sulfuric/Oxalic Acid Mixtures by Hard Anodization, Kashi, Mohammad Almasi, Ramazani, Abdolali, Mayamai, Yashar, Noormohammadi, Mohammad
Abstract Shear properties of epoxy LY 556 under high strain rate loading are presented. Torsional Split Hopkinson Bar apparatus was used for the studies in the shear strain rate range of 385–880 per sec. Experimental details, specimen configuration and development, data acquisition, and processing are presented. Shear…