Materials Literature
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Within the tight-binding approximation, we study the dependence of the electronic band structure and of the optical conductivity of a graphene single layer on the modulus and direction of applied uniaxial strain. While the Dirac-cone approximation, albeit with a deformed cone, is robust for sufficiently small strain,…
MnO(2) as one of the most promising candidates for electrochemical supercapacitors has attracted much attention because of its superior electrochemical performance, low cost, and environmentally benign nature. In this Letter, we explored a novel route to prepare mesoporous MnO(2)/carbon aerogel composites by electroch…
In a search for environmentally sensitive (solvatochromic) dyes with superior properties, we extended the electronic conjugation of one of the best solvatochromic dyes, Prodan, by substituting its naphthalene core with fluorene. The newly synthesized fluorene derivatives bearing strong electron-donor (dialkylamino) an…
Abstract Hydrogen is important as a new source of energy for automotive applications. It is clear that the key challenge in developing this technology is hydrogen storage. Current methods for hydrogen storage have yet to meet all the demands for on‐board applications. High‐pressure gas storage or liquefaction cannot f…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTMacromolecules, Dendrimers, and Nanomaterials in Magnetic Resonance Imaging: The Interplay between Size, Function, and PharmacokineticsAaron Joseph L. VillarazaAaron Joseph L. VillarazaRadiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethes…
Abstract Halloysite nanotubes (HNTs) are types of naturally occurring 1:1 clays with nanotubular structures and similar chemical composition to kaolin. Due to various characteristics such as nanoscale lumens, high length‐to‐diameter ratio, relatively low hydroxyl group density on the surface, etc., numerous exciting a…
New Schiff bases containing a hydroxynaphthyl ring and substituted benzothiazolyl groups have been synthesized. High-resolution NMR spectra confirmed that these anils exist as enol-keto tautomers in solution. The results from NMR data demonstrated that the proportion of enol tautomer exceeded 90% in these substituted…
Dielectric relaxation study of formamide (FMD) has been carried out with butylene glycol (BLG) at different temperatures. Time domain reflectometry in reflection mode has been used to measure the reflection coefficient in the frequency range of 10 MHz–20 GHz. The dielectric parameters, that is, static dielectric permi…
The cover picture shows the activity volcano plot for the heterogeneous catalytic oxidation of HCl (the Deacon Process), where the turnover frequency is plotted against the reaction temperature and the dissociative oxygen binding energy. In their paper on page 98 ff., Bligaard et al. establish an activity relationship…
It was found that hydrocarbon nanotubes (HCNTs) and nano-onions (HCNOs) (hereafter collectively referred to as HCNT(O)s) can be converted to carbon nanotubes (CNTs) and nano-onions (CNOs) (hereafter collectively referred to as CNT(O)s) upon prolonged sonication via hybrid CNT⊂HCNT and CNO⊂HCNO nanostructures as interm…
The anode-supported planar solid oxide fuel cell (SOFC) was fabricated by a cost-effective single step cofiring process using high shear compaction (HSC)™ anode substrate. The HSC™ process is a novel ceramic tape fabrication technique, which offers advantages in low-cost and high-volume production of the anode substra…
We show that for graphene with any finite asymmetry in the on-site energy between the two sublattices (Δ), the optical absorption edge is determined by the Δ. The universal conductance will be broken and the conductance near the band edge varies with frequency as 1/ω2. The onset conductance is σc=2σ0=πe2/2h, independe…
We have investigated the Si and O self-diffusion in stoichiometric and substoichiometric amorphous ${\text{SiO}}_{2}$ by means of molecular-dynamics simulations. The diffusivity and the migration energies at different Si concentrations are reported and the results in qualitative agreement with previous experimental an…
Abstract Oxygen‐related surface functional groups on diamond‐like carbon (DLC) films were derivatized with fluorine‐ and nitrogen‐related groups by the gas‐phase chemical derivatization (GCD) method, and the groups were analyzed quantitatively by X‐ray photoelectron spectroscopy (XPS). It is desirable that a derivatiz…
Achieving stable single-digit nanometer inverted domains in ferroelectric thin films is a fundamental issue that has remained a bottleneck for the development of ultrahigh density (>1 Tbit/in.2) probe-based memory devices using ferroelectric media. Here, we demonstrate that such domains remain stable only if th…
Carbon nanotubes in printed field emission arrays are known to be often damaged during field emission. A high-resolution transmission electron microscopy and Raman scattering spectra suggest that the degraded structure is mainly determined by electrical treatment conditions. A nonstationary alternating-current treatme…
The influence of water vapor in air on power generation characteristic of solid oxide fuel cells was analyzed by measuring cell voltage at a constant current density, as a function of water vapor concentration at 800°C and 1000°C. Cell voltage change was negligible at 1000°C, while considerable voltage drop was observ…
The blends of butadiene rubber (BR), urethane rubber (EU) and natural rubber (NR) was prepared using a blending technique in presence of different types of carbon black. The effect of filler on morphological and wear characteristics was studied. ISAF type of carbon black showed a significant effect on optimum cure tim…
The chiral tris-monodentate imidazolinyl ligands 1 a-c exhibit a strong tendency to form the discrete, helical [2+3] nanocages 3 ([1(2).2(3)]) with tartaric acids 2. Circular dichroism (CD) spectra and theoretical calculations reveal that supramolecular handedness of capsulelike architectures is determined only by the…
Highly oriented Zn(NO 3 ) 2 ·6H 2 O nanotubes were grown on mica substrates based on an epitaxy mechanism. The Zn(NO 3 ) 2 ·6H 2 O nanotubes with rectangular cross-section were self-assembled on mica surfaces into large-area, interconnected hexagonal networks. Fast evaporation of the solvent was found to be crucial fo…