Materials Literature
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We investigate the influence of temperature on the self-assembly of 2,6,11-tricarboxydecyloxy-3,7,10-triundecyloxy triphenylene (asym-TTT) adsorbed on HOPG using scanning tunneling microscopy (STM) at the liquid/solid interface. We show that the packing structures of 2D self-assembled asym-TTT can be precisely tuned b…
In this letter, we quantitatively investigated epitaxial GaAs nanowires catalyzed by thin Au films of different thicknesses on GaAs (111)B substrates in a metal-organic chemical vapor deposition reactor. Prior to nanowire growth, the de-wetting of Au thin films to form Au nanoparticles on GaAs (111)B in AsH3 ambient a…
Vacuum-assisted compression resin transfer molding, a flexible resin transfer molding process, has been developed to reduce a cycling period in the present study. The vacuum-assisted compression resin transfer molding utilizes an extra elastic film placed between the upper mold and the mold cavity compared with resin…
First-principles simulations for the C K-edge X-ray photoelectron (XPS) and near-edge X-ray fine-structure (NEXAFS) spectra of representative polymer solar cell acceptor (PSCA) molecules have been carried out with special focuses on the [6,6]-phenyl-C n +1 -butyric acid methyl ester (PC n BM, n = 60, 70, 84). In the X…
Pyruvate phosphate dikinase (PPDK) catalyzes the phosphorylation reaction of pyruvate that forms phosphoenolpyruvate (PEP) via two partial reactions: PPDK + ATP + P(i) → PPDK-P + AMP + PP(i) and PPDK-P + pyruvate → PEP + PPDK. Based on its role in the metabolism of microbial human pathogens, PPDK is a potential drug t…
The electrochemical sensing properties of graphene-based and carbon nanotube (CNT)-based electrodes towards ascorbic acid, dopamine, uric acid, and glucose are systematically compared. Nano-sized Pd catalyst particles are uniformly dispersed on both carbon supports using a supercritical fluid deposition technique to i…
Abstract ZnO, comprising nanosize particles (approximately 40 nm) has been prepared by heating (300°C) ZnCO3, which was obtained as precipitate by mixing ZnSO4and (NH4)2CO3solutions. The prepared ZnO was characterized by X-ray diffraction, scanning electron microscopy (SEM), laser-induced breakdown spectroscopy, and a…
A number of batch polymerizations were performed to study the effect of pristine nanoparticle loading on the kinetics of free radical and RAFT polymerizations and properties of polystyrene/silica nanocomposites. To study the kinetics of polymerization, Conversion, molecular weight and polydispersity index (PDI) were m…
Optoelectric control of metal–organic frameworks would open up a new area of applications for hybrid materials. This article reports the calculated thermodynamic and electronic properties of a family of M3(C6X6) metal–organic frameworks (M = Mg, Ca, Zn, Cd, Hg, Ge, Sn, Pb; X = O, S, Se, Te). Herein, we present a syste…
BACKGROUND: English ivy (Hedera helix) is well known for its adhesive properties and climbing ability. Essential to its ability to adhere to vertical surfaces is the secretion of a nanocomposite adhesive containing spherical nanoparticles, 60-85 nm in diameter, produced exclusively by root hairs present on adventitiou…
Hydrogen is a common impurity in oxides and is known to exhibit dual behavior: It can act either as a dopant or alternatively as a compensating impurity, depending on whether its transition (pinning) level, $E(+/\ensuremath{-})$, intersects the conduction band or lies deep in the energy gap. In the present work the in…
The optical properties of silicon surfaces are affected by their atomic structure and in particular by whether their lattice is crystalline or amorphous. Silver atoms adsorbed on the Si surface enhance the absorption of light and electronic charge transfer at the surface, and the size and shape of the adsorbed Ag clus…
Tree frogs use adhesive toe pads for climbing on a variety of surfaces. They rely on wet adhesion, which is aided by the secretion of mucus. In nature, the pads will undoubtedly get contaminated regularly through usage, but appear to maintain their stickiness over time. Here, we show in two experiments that the toe pa…
By filling a PDMS top layer with porous carbon–silica microspheres, a defect-free mixed matrix membrane was created with notable CO2 reverse selective separation properties. For the separation of CO2 over H2 at room temperature and 10 bar inlet pressure, these membranes demonstrate high CO2 gas fluxes up to 3 × 10−7 m…
A new strength test method for asphalt binders at low temperatures is investigated in this paper. A modified Bending Beam Rheometer (BBR), capable of applying loads at different rates, is used to obtain asphalt binder flexural strength. Strength values obtained from the BBR test are compared with strength values obtai…
Most proteins have not evolved for maximal thermal stability. Some are only marginally stable, as for example, the DNA-binding domains of p53 and its homologs, whose kinetic and thermodynamic stabilities are strongly correlated. Here, we applied high-throughput methods using a real-time PCR thermocycler to study the s…
A new Ti ‐20 Nb ‐10 Zr ‐5 Ta bioalloy with low Young's modulus (59 GPa) was coated with nanocrystalline hydroxyapatite ( HA ) ceramic layer by chemical method of soaking in a slightly supersaturated calcium and phosphate ions solution. The formation of HA was demonstrated using XRD , Raman microscopy and energy‐disper…
A N-donor containing carboxylic ligand, 5-(pyridin-4-yl)isophthalic acid (H2L), was applied to construct two new coordination polymers [Cd(L)(DMF)] n (1, DMF = N,N-dimethylformamide) and {[Co(L)(H2O)2] · 0.5CH3OH · 1.5H2O} n (2) under different conditions. The complexes were characterized by IR, elemental, and thermog…
We have demonstrated a binary chemoselective gas sensor using a combination of plasmonic nanohole arrays and a voltage-directed assembly of diazonium chemistry. The employment of a voltage-directed functionalization allows for the realization of a multiplexed sensor. The device was read optically and was fabricated us…
The aim of this study was to investigate the effect of relative humidity on the migration of benzophenone from paperboard into the food simulant Tenax®. Kinetic migration investigations were carried out with three relative humidities in the interval between 39% and >73%. All investigations were carried out at a consta…