Materials Literature
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Ferroelectric photonic band-gap (PBG) structures are fabricated by the infiltration of sodium nitrite into the nanoporous silicon templates composed by the electrochemical etching of n-type silicon. Reversible spectral tuning of the PBG and of the microcavity mode up to 15nm is attained in the temperature interval fro…
Abstract This work demonstrates a method for non‐invasively monitoring the growth and Φ6 virus infection of Pseudomonas syringae bacteria using a 1‐D porous silicon photonic crystal and a white‐light source coupled to a CCD spectrometer. Bacteria growth on porous Si leads to increased scattering efficiency that can be…
Field Programmable Gate Arrays (FPGAs) are important hardware platforms in various applications due to increasing design complexity and mask costs. However, as CMOS process technology continues to scale, standard copper interconnect will become a major bottleneck for FPGA performance. In this paper, we propose utilizi…
Nanoimprint lithographically (NIL) prepared polymer film replicas of micrometer scale topographic master patterns are used as liquid crystal alignment surfaces. Depolarized transmission light microscopy study of nematic liquid crystal cells made using the replicas as one window shows that the NIL generated linear line…
Combining in situ studies of the catalyst activity during single-walled carbon nanotube (SWCNT) growth by mass spectrometry with differential scanning calorimetry and Raman spectroscopy results, the authors expose the favorable features of small catalyst for SWCNT growth and their relationship with synthesis parameter…
To produce surface plasmons, silver nanostructures were fabricated using a thermal evaporation method and the surface plasmon wavelength was tuned via an annealing. These nanostructures were located between the indium tin oxide (ITO) and poly(3,4-ethylenedioxy thiophene)/poly(styrenesulfonate) for the coupling of the…
<div class="htmlview paragraph">Irreversible plugging of diesel particulate filters caused by lubricant-derived metallic ash is the single most important factor responsible for long-term performance degradation and reduction in the service life of these filters. While a number of studies in the open literature h…
We use molecular-dynamics simulation to elucidate phonon scattering from the high-energy $\ensuremath{\Sigma}29$ twist grain boundary in silicon. In particular, we have computed the dependence of energy transmission through the grain boundary on the wavelength and angle of incidence. Transmission through the grain bou…
Abstract The present work investigates lithium insertion into highly ordered nanotubular layers of TiO 2 and its electrochromic effects. The nanotubes were formed by anodization of titanium in 1 M (H 3 PO 4 ) + 1 M (NaOH) + 0.5wt% HF electrolyte at 20 V. This leads to nanotubular layers with a thickness of 1 ± 0.1 µm,…
Single-phase samples of Bi(Fe1−xCrx)O3 with x=0, 0.1, and 0.2 were synthesized by a combustion method. X-ray diffraction reveals that the lattice parameters of Bi(Fe1−xCrx)O3 perovskites decrease linearly with the Cr content, indicating that Cr ions substitute for Fe ions to form a solid solution. X-ray photoelectron…
We report experimentally that room-temperature ferromagnetism of Co-doped ZnO is strongly correlated with structural defects, and that carriers involved in carrier-mediated exchange are by nature by-products of the creation of the defects. On the other hand, the carrier concentration has pronounced influences on the a…
The stricter emissions legislation in the US, require the implementation of Diesel Particulate Filters (DPF) for Heavy Duty Diesel engines to meet the 2007 PM emissions targets. Cordierite based wall-flow filters with high filtration efficiency, low Δp and good thermal durability are the product of choice for these ap…
We prepared novel cholesterol-appended squaraine dye 1 and model squaraine dye 2 and investigated their aggregation behavior in solution and thin films using photophysical, chiroptical, and microscopic techniques. Investigations on the dependence of aggregation on solvent composition (good/poor, CHCl3/CH3CN) demonstra…
BACKGROUND: Silicone implants are being used increasingly worldwide, especially in breast augmentation procedures. The most common morbidity observed is capsular contracture, which occurs in 15 percent of cases. To overcome this problem, the authors have developed a novel nanocomposite based on polyhedral oligomeric s…
<div class="htmlview paragraph">A numerical model describing the ammonia based SCR process of NO<sub>X</sub> on zeolite catalysts is presented. The model is able to simulate coated and extruded monoliths. The development of the reaction kinetics is based on a study which compares the activity of zeol…
Using inelastic neutron scattering and applied fields up to 11.4 T, we have studied the spin dynamics of the Cr7Ni antiferromagnetic ring in the energy window 0.05-1.6 meV. We demonstrate that the external magnetic field induces an avoided crossing (anticrossing) between energy levels with different total-spin quantum…
<div class="htmlview paragraph">Urea-based Selective Catalytic Reduction (SCR) has the potential to meet U.S. Diesel Tier 2 Bin 5 emission standards for NOx in 2010. The operating and driving conditions of light-duty and heavy-duty vehicles make it necessary to customize catalyst features to the application. Thi…
Abstract Magnesium borate activated by dysprosium (MgB 4 O 7 :Dy) is a low‐Z eff , tissue‐equivalent material that is commonly used for medical dosimetry of ionizing radiations such as gamma and X‐rays using the thermoluminescence (TL) technique. Nanocrystals of the same material are produced and their TL characterist…
This letter presents direct observation of growth hormone receptor in one single cancer cell using nanodiamond-growth hormone complex as a specific probe. The interaction of surface growth hormone receptor of A549 human lung epithelial cells with growth hormone was observed using nanodiamond’s unique spectroscopic sig…
High performance single-walled carbon nanotube field effect transistors (SWCNT-FETs) fabricated with thin atomic layer deposited (ALD) Al2O3 as gate dielectrics and passivation layer are demonstrated. A 1.5μm gate-length SWCNT-FETs with 15nm thick Al2O3 insulator shows a gate leakage current below 10−11A at −2.5V&…