Materials Literature
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By performing Raman spectroscopic and electrochemical measurements along the nanotube length, we have demonstrated that there is a concentration gradient of structural defects along the tube length for super-long (ca . 5 mm) vertically aligned double-walled carbon nanotubes (SLVA-DWNTs) produced by water-assisted CVD…
The signal enhancement of an easy to fabricate, nanoporous alumina assisted surface plasmon resonance (SPR) sensor is investigated. It is theoretically shown that the presence of a thin (under 200nm) porous alumina layer on top of an aluminum film supporting the surface plasmons, may significantly increase (over one o…
A high refractive index of 2.231±0.001 at 1313 nm is achieved in a colorless, transparent spherical La4Ti9O24 glass that was prepared by using an aerodynamic levitation furnace. We also investigate the origin of the high refractive index based on the Lines theory. The physical parameters necessary for the theoretical…
A cold-shock technique was used to determine radula production rates for the chitons Acanthopleura hirtosa and Plaxiphora albida , and for the limpet Patelloida alticostata , which replaced their radular teeth at rates of 0.40, 0.36 and 0.51 rows d −1 , respectively. These rates are far slower than those determined pr…
Carbon nanotubes (CNTs) were produced from wood fiber using a low temperature process, which included continuous oxidization at 240 degrees C and cyclic oxidation at 400 degrees C. The inside diameter of the CNTs was approximately 4-5 nm and the outside diameter ranged from 10 nm to 20 nm. No CNTs were produced when p…
A polymer filled with high dielectric constant particles to achieve greater dielectric constant and energy density has obvious appeal. It also is fraught with problems. At low-volume fractions of high dielectric contrast filler, little electric field resides in the filler, and most of the increase in effective dielect…
Autofluorescent algal samples were spiked with europium beads for analysis on a novel all-solid-state, time-gated luminescence (TGL) microscope. Pulsed UV excitation (365 nm) was provided by a high-power UV-LED source fitted to an Olympus BX51 microscope. An "Impactron" electron multiplying charge-coupled-device (CCD)…
Abstract A series of modified montmorillonites including Zn 2+ loaded montmorillonite (Zn/MMT), Ce 3+ loaded montmorillonite (Ce/MMT) and Zn 2+ ‐Ce 3+ loaded montmorillonites (Zn‐Ce/MMT) were prepared by an ion‐exchange reaction, and characterized using X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD),…
The use of cardenolides like ouabain, digitoxin, or oleandrin has been reported previously many times as a means of potentially combating human refractory prostate cancer by inducing apoptosis through an increase in intracellular calcium concentrations. The aims of the current study were to investigate if part of the…
The imaging properties and observation of the sterically regulated translational motion of discrete tungsten polyoxometalate Linqvist ions (i.e., [W(6)O(19)](2-)) within carbon nanotubes of specific internal diameter are reported. The translational motion of the nonspheroidal anion within the nanotube capillary is fou…
The hydrolytic degradation process and degradation product patterns of biodegradable homo- and copolyesters of 1,5-dioxepan-2-one (DXO) and ε-caprolactone (CL) were monitored by electrospray ionization mass spectrometry (ESI-MS). The degradation product patterns were compared to mass loss, molecular weight changes, co…
Abstract There is a demand for more efficient and tissue‐specific MRI contrast agents and recent developments involve the design of substances useful as molecular markers and magnetic tracers. In this study, nanoparticles of gadolinium oxide (Gd 2 O 3 ) have been investigated for cell labeling and capacity to generate…
Three series of amorphous AB copolymer networks with shape-memory capabilities were obtained from poly[(L-lactide)-ran-glycolide]dimethacrylate (DM) as crosslinker and ethylacrylate-(AEt), butylacrylate-(ABu), or hexyl acrylate (AHe) as comonomers. The switching temperature Tsw of the shape-memory effect could be adju…
This review is dedicated to the problems of nanostructured ceramics consolidation.Laboratory practice in recent years has displayed several potentially important technologies for consolidation of ceramic nanopowders, such as spark plasma sintering, high pressure sintering and rate controlled sintering. The grain growt…
Transplantation of Bcl-2-transduced human umbilical vein endothelial cells (ECs) in protein gels into the gastrocnemius muscle improves local reperfusion in immunodeficient mouse hosts with induced hind limb ischemia. We tested the hypothesis that incorporation of local, sustained growth factor delivery could enhance…
EuS nanoparticles were synthesized by solution-phase thermolysis of the diethylammonium salt of the anionic europium dithiocarbamate complex, [Eu(S 2 CNEt 2 ) 4 ] − . Oleylamine and triphenylphosphine were used as surfactants to prevent nanoparticle agglomeration and stabilize particle growth. By varying the synthetic…
Lead-free piezoelectric ceramics KNN modified by Li-substitution and CuO addition have been synthesized, and the piezoelectric and dielectric properties were measured. A morphotropic phase boundary (MPB) between orthorhombic and tetragonal phases was formed with Li-substitution. The co doping of Li and Cu markedly enh…
The giant magnetically-induced deformation of ferromagnetic shape memory alloys results from the magnetic field-induced rearrangement of twinned martensite under the magnetic field. This deformation is conventionally referred to as the magnetic-field-induced-strain (MFIS). The MFIS is comparable in value with the spon…
X-ray powder diffraction and magnetization measurements were done on the magnetic shape memory alloys Ni2Mn1+xSn1-x. The alloys with 0≤x≾0.4 crystallize in the cubic L21 structure and exhibit the ferromagnetic behavior. X-ray diffraction patterns indicate that the excess Mn atoms occupy the Sn sites. Furthermore, magn…
We present an overview of the state of the art in long-wavelength boron-dipyrromethene (BODIPY) fluorophores, focusing on strategies to shift the absorption and emission bands into the red/near-infrared (NIR) range of the spectrum. This report also discusses chemical modifications of the chromophoric core to obtain an…