Materials Literature
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Single-particle fluorescence spectroelectrochemistry was used to investigate the electrochemical oxidation of isolated, immobilized particles of the conjugated polymers BEH-PPV and MEH-PPV at an indium tin oxide (ITO) electrode immersed in an electrolyte solution. Two types of particles were investigated: (i) polymer…
Luminescent-kinetic studies for LiY(0.9)Ce(0.1)P(4)O(12), LiGd(0.9)Ce(0.1)P(4)O(12) and NaGd(0.9)Ce(0.1)P(4)O(12) phosphates which were prepared by the melt solution technique have been performed using synchrotron radiation excitation within 3-12.4 eV energy range and x-ray radiation at T = 10-300 K. The [Formula: see…
Abstract Carbon nanotubes (CNTs) offer interesting applications in nanotechnology, biochemistry, biomedicine, catalysis, electronics, optoelectronics, electrochemistry, and sensor technologies. They could also be used as a filler for metallic nanoparticle composites prepared at elevated temperatures by sintering. In t…
Biodegradable nanofibers are expected to be promising scaffold materials for biomedical engineering, however, biomedical applications require control of the degradation behavior and tissue response of nanofiber scaffolds in vivo. For this purpose, electrospun nanofibers of poly(hydroxyalkanoate)s (PHAs) and poly(lacti…
We perform analyses of cryogenic heat capacity data sets, that are available from thermo-physical literature for group-IV materials (diamond, Si, Ge, and 3C-SiC), a variety of III–V materials (BN, BP, BAs, GaN, GaP, GaAs, GaSb, InP, InAs, InSb), and several II–VI materials (ZnO, ZnS, ZnSe, CdS, and CdTe). A prominent…
The preparation, crystal structures and magnetic properties of the copper(II) complexes of formula [Cu(2)(tppz)(H(2)O)(2)(CF(3)SO(3))(4)] (1), [Cu(tppz)(CrO(4))](n) x 3nH(2)O (2) and [Cu(4)(tppz)(4)(H(2)O)(4)(MoO(4))(2)](CF(3)SO(3))(4) x 7 H(2)O (3) [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine] are reported. Complex 1…
Abstract We have investigated temperature σ ( T ) and magnetic field σ ( B ) dependences of the conductivity σ of multiwalled carbon nanotubes (MWNTs) with different average outer diameter $\overline d $ . From the experimental data we have separated the quantum corrections to σ ( T ) and σ ( B ). We have discovered t…
The synthesis, characterization, and catalytic behavior of several amine-functionalized ordered mesoporous silica (OMS) materials are reported. All samples show catalytic activity for the conversion of glyceryl tributyrate with methanol to methyl esters in high yield (>60%). The reactivity of the amines approximately…
Abstract We studied a possibility of reduction of the surface of graphite fluoride obtained by fluorination of highly oriented pyrolytic graphite (HOPG) by a gaseous mixture of BrF 3 and Br 2 . X‐ray diffraction (XRD) revealed a layered structure of the fluorinated product being a second‐stage intercalate due to a pre…
This paper reports a processing technology of natural nanorod materials. Palygorskite is a type of natural nanorod hydrous clay mineral, and its basic unit is about 20-40 nm in diameter and 1-5 ¿m in length. Low-cost single crystals of palygorskite can be produced in mass by simply adding freeze process into tradition…
We investigated, by experiment and theory, the lateral structure of a weak polyelectrolyte brush at various added salt concentrations and chain grafting densities. Model poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brushes with grafting density gradients were developed for this study by using a novel "Langmuir-…
In this paper, we report on a facile, environmentally friendly, and ultrasonically assisted route to synthesis of three-dimensional (3D) hierarchical silver microstructures. This is achieved without the use of any templates, surfactants, or polymers. By reducing [Ag(NH 3 ) 2 ] + with H 2 O 2 in an aqueous solution, 3D…
Silylated layered double hydroxides (LDHs) were synthesized through a surfactant-free method involving an in situ condensation of silane with the surface hydroxyl group of LDHs during its reconstruction in carbonate solution. X-ray diffraction (XRD) patterns showed the silylation reaction occurred on the external surf…
The isotropic-to-nematic transition in a two-dimensional fluid of hard needles is studied using grand canonical Monte Carlo simulations, multiple histogram reweighting, and finite size scaling. The transition is shown to be of the Kosterlitz-Thouless type, via a direct measurement of the critical exponents η and β, of…
We propose a new synthesis pathway without any sacrificial template to prepare original monodisperse thermoresponsive capsules made of a wax core surrounded by a silica shell. Under heating, the inner wax expands and the shell breaks, leading to the liquid oil release. Such capsules that allow triggered deliverance pr…
We report a novel approach for direct fabrication of graphene oxide nanoribbons (GONRs) on the 3-aminopropyltriethoxysilane (APTES)-modified SiOx surface with varied widths and lengths by plasma etching of graphene oxide (GO) wrinkles (GOWs), in which top layers of GOWs are used as sacrificial layers. AFM images show…
We present a novel open-framework oxide material constructed from Ge(10)(O,OH)(28) (Ge(10)) oxide clusters prepared via a nonsurfactant route. The material shows two distinct pore windows of 9.43 and 4.65 A and a low framework density structure of 12.7 Ge atoms per 1000 A(3). The topological study leads to the recogni…
The deposition in an ultrahigh vacuum of prototypical linear para-sexiphenyl (6P) molecules onto the anisotropic reconstructed surface of Cu(110)2 × 1-O presents an ideal system with reduced symmetry for investigation. A dynamic photoemission electron microscopy (PEEM) study of the nucleation and growth of 6P, combine…
A surfactant-free two-step shearing strategy was applied to disperse vertically aligned carbon nanotube (VACNT) arrays into individually dispersed CNTs. First, big blocks of VACNT arrays were sheared into fluffy CNTs. The fluffy CNTs were composed of CNT bundles with a diameter of 1-10 microm and a length of several m…
CdSe/CdS and CdSe/ZnS core/shell nanorods have been synthesized with various shell thicknesses and characterized by TEM. The CdSe cores have an aspect ratio of 5.0 ± 0.7. The TEM results show that there are different axial and radial shell growth rates. Shell deposition maintains the rod morphology, with a final aspec…