Materials Literature
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Using surface-enhanced Raman spectroscopy we have obtained high-resolution spectra of individual molecular components containing 10 2 -10 3 carbon atoms at the surface of carbon nanoparticles. A number of well-defined spectral features occur in the 6.2, 7.6, 7.8, and 8.6 μm wavelength range that replicate those found…
A series of mesoporous silica films with different porosities and different pore sizes were prepared using different templates or different template concentrations in tetraethylorthosilicate colloid solutions. The amphiphilic templates such as cetyltrimethylammonium bromide ( ), Brij-56, Tween80, and Pluronic P123 wer…
We report on large magnetic moments of up to 18.9μB∕Co in Co-doped ZnO films grown by pulse-injection metal organic chemical vapor deposition. The magnetic moment saturates easily in perpendicular magnetic fields and is considerably reduced when the magnetic field is applied parallel to the film plane. The saturation…
The development of deterministic models for predicting the accumulation of corrosion damage to zirconium and Zircaloys in pressurized water reactor (PWR) coolant environments requires the acquisition of values for various model parameters. In the present work, the point defect model (PDM) was further developed to acco…
In this contribution, we compare the photoluminescence properties of ZnO nanorods and epilayers with those of bulk ZnO. Owing to the high aspect ratio (length of 4–14μm, diameter of 80–500nm), the characterized ZnO nanorods show very good optical properties. Due to the high surface-to-volume ratio in ZnO nanorods, sur…
epitaxial films were grown on (0001) sapphire substrates by radio-frequency plasma-assisted molecular beam epitaxy. metal-semiconductor-metal ultraviolet photodiodes with various finger widths and pitches ranging from 10 to were also fabricated. It was found that we achieved largest detector responsivity from the phot…
Abstract The effects of the polymer concentration and quenching temperature on the phase separation, the membrane morphology and polymer crystallization behavior in a poly(4‐methyl‐1‐pentene) (TPX)‐dioctylsebacate (DOS)‐dimethylphthalate (DMP) system via thermally induced phase separation were studied with a pseudobin…
white/red/green phosphors were prepared by the Pechini sol-gel process. X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), diffuse reflectance, photoluminescence, cathodoluminescence spectra, and lifetimes were utilized to characterize the samples. XRD reveal that the samples begin to cryst…
We study the heat conduction of two nonlinear lattices joined by a weak harmonic link. When the system reaches a steady state, the heat conduction of the system is decided by the tunneling heat flow through the weak link. We present an analytical analysis by the combination of the self-consistent phonon theory and the…
Large-scale, well-aligned and oriented wurtzite ZnS nanobelt arrays are fabricated by a simple solvothermal reaction and subsequent heat treatment. The nanobelts grow along the [0001] direction perpendicularly on a zinc substrate, which are about 30nm in thickness, several hundreds of nanometers in width, and up to 4μ…
The authors study deoxyribonucleic acid (DNA) sensing characteristics of carbon nanotube network field-effect transistors (CNNFETs) by monitoring their electrical responses upon immobilization with a DNA probe, hybridization with DNA analytes, and intercalation with a N,N′-bis(3-propylimidazole)-1,4,5,8-naphthalene di…
Transparent conductive fluorine-doped tin oxide (FTO, ) films were grown using a low-pressure metallorganic chemical vapor deposition (LP-MOCVD) with tetramethyltin (TMT), oxygen containing ozone , and hydrofluoric acid (HF) as a dopant. Using ozone contained oxygen instead of pure oxygen, the substrate temperature co…
The authors introduce an emergent method to fabricate a few-nanometer-size columnar superlattice with a checkerboard pattern in inorganic spinels by harnessing the Jahn-Teller structural distortion. Transmission electron microscope images reveal that the fundamental building blocks are two types of long nanorods with…
The development of deterministic models for predicting the accumulation of corrosion damage to zirconium and Zircaloys in boiling water reactor coolant environments requires the acquisition of values for various model parameters. In the present work, the point defect model (PDM) was further developed to account for th…
Amorphous manganese oxide/carbon composites were synthesized by directly reducing potassium permanganate with acetylene black (AB) as a cheap reducing agent. A reaction is postulated and confirmed by checking the evolved gas and other species such as and left in the mother liquor. All the composites were characterized…
Shape memory alloys With the shape memory effect, heating reverses prior plastic deformation. Alloys that exhibit this effect are ordered solid solutions that undergo a martensitic transformation on cooling. Shape memory effects were first observed in AuCd in 1932, but it was the discovery by Buehler et al. in of the…
Ru was evaluated as a new underlayer material for depositing ultrathin chemical vapor deposited (CVD) Cu seed layers, and the morphology and adhesion property of CVD Cu films on Ru were compared to that of Ta. CVD Cu films deposited on Ru showed higher nuclei density than Cu films deposited on Ta. Relatively low depos…
Bi 1 − x Sb x nanowires are predicted to show an increased thermoelectric efficiency compared to bulk materials. The authors have synthesized dense Bi0.3Sb0.7 nanowire arrays by electrodeposition into porous anodic alumina and fabricated Ni electrical contacts to the wires. The nanowire/alumina composite was assembled…
The structure and composition of the passive film formed on the super-austenitic AISI 254SMO stainless steel in borate solution were studied using photocurrent spectroscopy coupled with electrochemical measurements. Charge passed calculations suggested that the Cr ( VI ) phase formed in the transpassive region is inso…
The ac conductivities of and 1% Ca-doped have been characterized as a function of oxygen and water vapor partial pressures in the temperature range 300– . Partial conductivities have been determined from the open-circuit voltage of , , and concentration cells. The materials exhibit n- and p-type electronic conductivit…