Materials Literature
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We have studied the structural stability of NaBH(4) under pressures up to 17 GPa and temperatures up to 673 K in a diamond anvil cell and formed an extended high P-T phase diagram using combined synchrotron x-ray diffraction and Raman spectroscopy. Even though few reports on phase diagram of NaBH(4) are found in curre…
Here we present our work on development of new solution processable small molecules for efficient organic photovoltaic cells (OPVs). Boron subphthalocyanine derivatives possess unique structural and photophysical properties, i.e. excellent solubility, low tendency to aggregate, and high extinction coefficients, that e…
Abstract We investigated the performance of Schottky diodes fabricated on diamond surface oxidized by two different techniques. A detailed comparison shows vacuum ultraviolet (VUV) light technique has better performance than the standard wet chemical technique: ideality factor and Schottky barrier height are more repr…
Abstract A coupled model was used to simulate columnar grain growth in TIG (tungsten inert‐gas) molten pool of nickel base alloy. The cellular automaton algorithm for dendritic growth is incorporated with solute transport model to take fluid flow into consideration. The results indicate that shear flow changes the sol…
Rhodium (Rh) metal is used in a variety of organic reactions, especially in the hydrogenation of arenes which is an important chemical process in the synthesis of fine chemicals. Among diverse hydrogenations, the ring hydrogenation of phenol is considered as an important industrial reaction as its products, cyclohenxa…
A first generation dendrimer comprised of a 9,9,9',9'-tetra-n-hexyl substituted 2,2'-bifluorene core, biphenyl dendrons, and 2-ethylhexyloxy surface groups can rapidly detect high electron affinity, explosive-related analytes such as pnitrotoluene and 2,4-dinitrotoluene. Stern-Volmer analysis of the dendrimer in solut…
Abstract We investigate the influence of different roughnesses (20, 270, and 500 nm) of silicone substrates hermetically coated with the same nanocrystalline diamond (NCD) films on adhesion (1 h) and viability (48 h) of human mesenchymal stromal cells (MSC) and human osteoblasts (SAOS‐2). MSC adhere similarly on all N…
Abstract A nanosized island‐like diamond film containing silicon‐vacancy (SiV) centers was grown by microwave plasma CVD on Si substrate. The diamond film was characterized by scanning electron microscope, microRaman, and photoluminescence spectroscopies. Nonuniform spatial localization of the SiV photoluminescent cen…
Photothermal control of the enzymatic activity of horseradish peroxidase (HRP) bound to the surface of gold nanoparticles (AuNPs) is demonstrated. Laser light is absorbed by the AuNPs and transformed into heat, which dissipates into the environment of each nanoparticle. This heat influences the enzymatic conversion of…
Abstract The present work reports on application of gold, nickel, and diamond nano‐particles as a masking material for realization of diamond 3D nano‐structures after a low power (100 W) plasma etching process in a gas mixture of CF 4 /O 2 . Obtained 3D structures strongly depend on the masking material. Application o…
We have applied photoluminescence (PL) microscopy with scanning laser excitation wavelength for imaging and characterizing individual, millimeter-long, single-walled carbon nanotubes (SWNTs) grown by chemical-vapor deposition on structured $\text{Si}/{\text{SiO}}_{2}$ substrates. Trenches etched into the substrates al…
Die schichtweise Abscheidung von Poly(diallyldimethylammoniumchlorid) und Polyacrylsäure, bei der anorganische Schichten aus Natriummontmorillonit-Lehm eingebaut werden, liefert eine durchgängige Schichtstruktur im Filminnern aus mikrometerdicken Polymerkomplex- und dünnen Lehmschichten (siehe Bild; rechts: Querschnit…
An ensemble Monte Carlo method is used to compare the potentialities of SiC and ZnO materials for field effect transistors. First, bulk material electron transport properties are compared and then the operation of MESFETs made from them are investigated. The simulated device geometries and doping are matched to the no…
The growth mechanism of carbon nanotubes (CNTs) catalyzed by nickel catalyst with benzene precursor has been studied by using density functional theory calculations. The typical initial process of the graphene growth is considered as the formation of biphenyl on Ni(111) surface with two benzene molecules and the minim…
The NSLS-II[1] program has a requirement for an unprecedented level of x-ray nanofocusing and has selected the wedged multilayer Laue lens[2,3] (MLL) as the optic of choice to meet this goal. In order to fabricate the MLL a deposition system is required that is capable of depositing depth-graded and laterally-graded m…
Photoreactive 3,4-diacetoxycinnamic acid- (DACA-) terminally conjugated poly(L-lactide) (PLLA) (DACA-PLLA) nanoparticles with different diameters were prepared by mixing acetonitrile as a good solvent and water as a poor solvent. The average diameters and morphologies of the nanoparticles prepared under various condit…
Abstract A simple sonochemical route for the synthesis of Ag nanoparticles on ZnO nanorods is reported. Ultrasonic irradiation of a mixture of ZnO nanorods, Ag(NH 3 ) 2 + , and formaldehyde in an aqueous medium yields ZnO nanorod/Ag nanoparticle composites. The powder X‐ray diffraction of the ZnO/Ag composites shows a…
Abstract The low temperature electronic transport of highly boron‐doped nanocrystalline diamond films is studied down to 300 mK. The films show superconducting properties with critical temperatures T c up to 2.1 K. The metal–insulator and superconducting transitions are driven by the dopant concentration and greatly i…
The experimental extinction spectrum of 38 nm long silver nanorods grown in the 22 nm pores of an anodic aluminum oxide (AAO) template is theoretically analyzed, using the discrete dipole approximation (DDA) method. A single broadband at 485 nm in the spectrum turns out to be the overlap of the two peaks at 430 and 51…
A new cathode material based on Li<TEX>$Ni_{0.8}Co_{0.15}Al_{0.05}O_2$</TEX> (LNCA)/polyaniline (Pani) composite was prepared by in situ self-stabilized dispersion polymerization in the presence of LNCA. The materials were characterized by fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectrosco…