Materials Literature
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Two new mesogenic homologous series containing 6-nitrobenzothiazole moiety at the terminus of the molecule, viz 2-(4′-n-alkoxyphenylazo)-6-nitrobenzothiazoles and 2-[4′-(4”-n alkoxybenzoyloxy) phenylazo]-6-nitrobenzothiazoles were synthesized. The molecular structures of these new compounds of both the series have bee…
Two new mesogenic homologous series of liquid crystalline compounds containing 1,2,4-triazole and 1,3,4-thiadiazole in the molecule viz. 1,4-bis{3-[2-(4-alkoxybenzelideneamino)-1,3,4-thiadiazole-5-ethylenethio]1,2,4-triazole-5-yl}phenyl and 5-(4-methoxyphenyl)-3-[2-(4-n-xybenzelidenamino)-1,3,4-thiadiazole-5-methylene…
The reaction of an acetylchlorin or diacetylbacteriochlorin with an aldehyde under microwave conditions readily affords the corresponding hydroporphyrin-chalcone. The aldehydes include aryl aldehydes, cinnamaldehyde, and all-trans-retinal. The chalcone causes a bathochromic shift of the long-wavelength absorption band…
Chlorinated phenols and chlorophenoxy radicals are known as predominant precursors for forming polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/PCDF), which are highly carcinogenic and persistent organic pollutants (POPs). Density functional theory (DFT) calculations have been carried out to explore the poten…
Photocurrent generation measured with an electrochemical cell on carbon nanotubes has been obtained mainly from single-walled nanostructures. In fact, multiwall carbon nanotubes (MWCNTs) were not expected to show analogous low-dimensional effects, due to their close similarity to metallic graphite. Recently we reporte…
Acrylic acid monomer in a viscous supporting nylon solution was polymerized and fabricated simultaneously via an electrospinning process. This novel polymerization method defines the fiber morphology as a network of interconnected mats. This network consists of smaller poly(acrylic acid) (PAA) fibers, approximately 19…
Phase diagram of benzoic acid (BA)–o-chloro benzoic acid (o-CBA) system has been studied by thaw melt method and the results show the formation of a simple eutectic mixture. Heats of fusion values of the components and eutectic mixture were determined with the help of differential scanning calorimeter. Excess Gibb's f…
ABSTRACT: The generalized equivalent circuit for Hebb-Wagner polarization in the frequency domain proposed by Jamnik and Maier (J Electrochem Soc 146:4183, 1999) includes the space-charge polarization that was previously neglected. In the present work, using a self-coded Fortran program, the completely generalized equ…
A high number-density of nanometer-sized stacking fault tetrahedra are commonly found during irradiation of low stacking fault energy metals. The stacking fault tetrahedra act as obstacles to dislocation motion leading to increased yield strength and decreased ductility. Thus, an improved understanding of the interact…
We consider a particular class of molecular electronic devices (MEDs) built around the photoactive dithienylethene switch. Light of an appropriate frequency can convert the switch from a high to a low conductance form. Various derivatives of the dithienylethene that have recently been investigated experimentally are m…
The evolution of thermal conductivity and heat capacity for the series of ${[{\text{PbMg}}_{1/3}{\text{Nb}}_{2/3}{\text{O}}_{3}]}_{1\ensuremath{-}x}{[{\text{PbTiO}}_{3}]}_{x}$ $(\text{PMN-}{\text{PT}}_{x})$ single crystals with $0\ensuremath{\le}x\ensuremath{\le}1$ are reported. PMN shows typical glasslike behavior in…
Pt ions-CeO(2) interaction in Ce(1-x)Pt(x)O(2-delta) (x=0.02) has been studied for the first time by electrochemical method combined with x-ray diffraction and x-ray photoelectron spectroscopy. Working electrodes made of CeO(2) and Ce(0.98)Pt(0.02)O(2-delta) mixed with 30% carbon are treated electrochemically between…
In this paper, we investigate the mechanics of a nanoscaled gigahertz oscillator comprising a carbon molecule oscillating within the centre of a uniform concentric ring or bundle of carbon nanotubes. Two kinds of oscillating molecules are considered, which are a carbon nanotube and a C(60) fullerene. Using the Lennard…
The gelation and aggregation properties of a newly synthesized structurally simplified tetrahexyl pyromellitamide 2 have been studied and compared to the previously reported tetra(ethylhexanoate) pyromellitide 1, indicating that the ester groups in the latter significantly impede its aggregation. Morphology studies (A…
Interfacial tension at the crystal/liquid interface is a crucial and important parameter in crystal growth kinetics. The objective of the present study is to develop a neural network that is simple to use for predicting this important parameter using only from the information of solubility, molecular weight, and densi…
This work investigates the movement of anions during potentiostatic controlled reduction of novel composite materials consisting of high surface area cellulose substrates, extracted from the Cladophora sp. algae, coated with thin ( approximately 50 nm) layers of the intrinsically conducting polymer (ICP) polypyrrole.…
We present the first experimental measurement of the geometric critical exponent beta associated with the percolation probability, the probability a metallic filler belongs to the conducting network, of an electrical composite. The technique employs conducting-tip atomic force microscopy to obtain a conducting areal d…
In this paper we report the design and implementation of a novel automated manufacturing system for carbon nanotube (CNT)-based nanodevices, which integrates a new dielectrophoretic (DEP) microchamber into a robotic-based deposition workstation. The microchamber has been fabricated to separate and select CNTs with the…
A rapid and sensitive method to detect single-walled carbon nanotubes (SWNTs) in biological samples is presented. The method uses polyacrylamide gel electrophoresis (PAGE) followed by quantification of SWNT bands. SWNTs dispersed in bovine serum albumin (BSA) were used to develop the method. When BSA-SWNT dispersions…
Nanopatterned surfaces with hydrophobic and hydrophilic domains were produced using the diblock copolymer polystyrene-block-poly(2-vinyl pyridine) (PS-b-P2VP) and polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA). The PS-b-P2VP diblock copolymer, mixed with the cross-linker benzophenone and spin-coated onto sili…