Materials Literature
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Several studies are currently ongoing to construct synthetic bone-like materials with composites of natural and polymeric materials with HA (hydroxyapatite). The present study aims to fabricate composite nanofibrous substrate of Chit/HA (chitosan/HA - 80:25) prepared by dissolving in TFA/DCM (trifluoroacetic acid/dich…
Recently we determined the iron-partial density of vibrational states (DOS) of nanocrystalline ${\text{Fe}}_{90}{\text{Zr}}_{7}{\text{B}}_{3}$ (Nanoperm), synthesized by crystallization of an amorphous precursor, for various stages of nanocrystallization separating the DOS of the nanograins from that of the interfaces…
Kinetic-theory-based models of rapid, polydisperse, solids flows are essential for the prediction of a wide range of practical flows found in both nature and industry. In this work, existing models for granular flows are critically compared by considering the techniques used for their derivation and the expected impli…
Rates of cycloreversion for squaraine rotaxane mono(endoperoxides) were enhanced by structural modifications that increased cross-component steric destabilization of the inward directed 9,10-anthracene endoperoxide group. The largest rate enhancements were obtained when the surrounding macrocycle contained two 2,6-pyr…
Highly splayed BaZrO 3 nanorods (BZO-NRs) were generated in YBa 2 Cu 3 O 7 − δ (YBCO) films doped with 2 vol% BZO on 5° vicinal SrTiO 3 (STO) substrates. It was observed that the splay angle of the BZO-NRs around the c -axis increases with film thickness from about 10° at 0.2 µm to 35°–40° at 1 µm. Although the same t…
A new family of polyanionic poly(alkyl aryl-ether) metallodendrimers decorated with four and eight cobaltabisdicarbollide units have been obtained in high yield by the ring-opening reaction of cyclic oxonium [3,3'-Co(8-(C(2)H(4)O)(2)-1,2-C(2)B(9)H(10))(1',2'-C(2)B(9)H(11))] with alkoxides formed by deprotonation of te…
We studied polymer-polymer interfacial slip in bilayer films of highly immiscible (interaction parameter, χ≅0.1) polyethylene and fluoropolymer from medium to higher shear stresses (10–200 kPa) using both visualization and stress reduction. We found good agreement between results from the two methods as well as with p…
Abstract Macromolecular design by interchange of xanthates/reversible addition fragmentation chain transfer polymerization (MADIX/RAFT) of diallyldimethylammonium chloride (DADMAC) using the hydrophobic O‐ethyl‐S‐(1‐methoxycarbonyl) ethyl dithiocarbonate MADIX/RAFT mediating agent, Rhodixan A1, was investigated. Attem…
In this work, removal of malachite green (MG) from aqueous solution using a low cost adsorbent, tamarind seed, was investigated. The adsorbent was characterized using SEM, BET surface area analyzer, and FT-IR. Decolorization of malachite green was studied as a function of different adsorption parameters such as temper…
The incorporation of tetrahydropyranyl (THP) groups into poly(3-alkylthiophene) offers an opportunity to prepare soluble π-conjugated polymers (πCPs) which, upon thermal annealing, may be rendered insoluble. Recent studies have shown that πCPs that may be rendered insoluble following thin film fabrication have potenti…
Abstract Miniemulsion polymerization reactions of methyl methacrylate (MMA) and vinyl acetate (VAc) for the synthesis of biocompatible polymeric nanoparticles were comparatively studied. 2,2'‐Azo‐bis(isobutyronitrile) was used as initiator, lecithin as surfactant, and Miglyol 812 or castor oil as costabilizers. Despit…
A series of solution processable small molecules (4TPM, 6TPM, and 8TPM) were synthesized with 2-pyran-4-ylidenemalononitrile (PM) as the electron-accepting unit and oligothiophene with different numbers as the electron-donating unit. Differential scanning calorimetry (DSC) measurement indicated that melting point and…
The effect of replacing the anchoring carboxylate groups in the Ru(H(2)dcbpy)(2)(NCS)(2) (H(2)dcbpy = 4,4'-dicarboxylic acid-2,2'- bipyridine) photoactive dye was studied by computational density functional theory (DFT) and time-dependent DFT (TD-DFT) methods. The main emphasis in the study was to compare a series of…
We experimentally demonstrate silver-nanowire-based plasmonic devices including the nanowaveguide, the nanocoupler, and the nanosplitter at optical communication wavelength of 1550 nm. The plasmon propagation loss in a 300-nm diameter silver nanowire is measured to be 0.3 dB/μm and the effective propagation length is…
Magnetoplasmonic nanostructures with enhanced magneto-optical (MO) activity hold great promise for the active manipulation of plasmon propagation. In this Rapid Communication, we demonstrate that the shape of elliptical nanocylinder plays an essential role on the large enhanced MO activity: (1) saturated MO activity c…
The interfacial electronic structure of C 60 / copper phthalocyanine (CuPc)/molybdenum trioxide (MoO 3 ) thin films grown in situ on indium tin oxide (ITO) substrates has been studied using synchrotron radiation-excited photoelectron spectroscopy in an attempt to understand the influence of oxide interlayers on the pe…
We have theoretically designed five different m-phenylene coupled high-spin bis-heteroverdazyl diradicals and their analogous p-phenylene coupled low-spin positional isomers. The geometry-based aromaticity index, harmonic oscillator model of aromaticity (HOMA) values for both the couplers (local HOMA), and the whole d…
Abstract We have synthesized and characterized two new carbazole‐based conjugated polymers, PCDCN and PCDTA, incorporating two strong light‐absorbing organic dyes. These polymers exhibit relatively low band gaps (∼1.5 eV) and broad absorption ranges (from 300 to 700 nm). We fabricated polymer solar cells incorporating…
Fluorinated, contorted hexabenzocoronenes (HBCs) have been synthesized in a facile manner via Suzuki-Miyaura coupling of fluorinated phenyl boronic acids followed by photocyclization and Scholl cyclization. In addition to the molecular conformation observed in previous HBC derivatives, close-contact fluorine-fluorine…
Abstract A series of low‐band‐gap (LBG) donor–accepor conjugated main‐chain copolymers (P1–P4) containing planar 2,7‐carbazole as electron donors and bithiazole units (4,4′‐dihexyl‐2,2′‐bithiazole and 4,4′‐dihexyl‐5,5′‐di(thiophen‐2‐yl)‐2,2′‐bithiazole) as electron acceptors were synthesized and studied for the applic…