Materials Literature
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The results of previous studies indicated that D. radiodurans mounts a regulated protective response to heat shock, and that expression of more than 130 genes, including classical chaperones such as the groESL and dnaKJ operons and proteases such as clpB are induced in response to elevated temperature. In addition, pr…
Experiments verified that a thermoelectric heat pump system is more efficient than an electrical heating device, for its heating coefficient reached more than 1.6 with suitable operating conditions. On the base of experimental data, a novel instantaneous water heater was developed by means of integrating thermoelectri…
Some nuclear power plants have degradation problems of their steam generators, associated with caustic SCC or lead-induced SCC in a caustic environment. The electrochemical corrosion potential is measured for a mill-annealed Alloy 600 specimen in a caustic solution with Cu oxide if it is present in the sludge. The eff…
A hydrothermal reaction of a mixture containing iron(II) oxalate dihydrate, phosphorus acid, piperazine, and water at 150 °C for 72 h gave light-yellow cubes of a new hybrid iron oxalate−phosphite, [C 4 N 2 H 12 ][Fe II 4 (HPO 3 ) 2 (C 2 O 4 ) 3 ], I . The structure, formed by FeO 6, HPO 3, and oxalate building units,…
Photodynamic therapy (PDT) has become an increasingly important method for the chemotherapeutic treatment of some cancers. It involves the systemic, topical, or intraperitoneal administration of a nontoxic drug called a photosensitizer, which, to some extent, preferentially localizes in the tumor [1,2]. When the tumor…
In this article, we report a systematic investigation on the morphologies of SBA-15 type large-pore periodic mesoporous organosilicas templated by the block copolymer P123. By tuning synthetic parameters such as stirring, acidity, reaction ratio, reaction duration, and autoclaving, a wide spectrum of unique primary pa…
Use of biological machines and environments in novel bioinorganic nanostructures is critical for development of new types of biosensors, bio-NEMS devices, and functional materials. Lipid bilayers that mimic a cell membrane have already played an important role in such applications. We present supported lipid bilayers…
A possible way to speed up the operation of liquid crystal structures based on nematic mixtures with a charge transfer complex between a fullerene and an organic molecule donor fragment is studied using pyridine and polyaniline monomers and polymers as systems with the donor?acceptor interaction. Self-organization is…
This paper describes the effects of oxidative electronic charging of the Au cores of the monolayer-protected clusters (MPCs), Au140(S(CH2)5CH3)53 and Au38(SCH2CH2Ph)24, on nuclear magnetic resonance (NMR) spectra of their monolayer ligand shells. Previously unresolved fine structure in the 13C NMR hexanethiolate methy…
Multiwalled carbon nanotubes (MWCNTs) were grown by chemical vapor deposition by applying C(2)H(2) fluxed over Fe(1)(-x)Co(x) catalyst supported by alkaline earth carbonate. Detailed investigations of the chemical process occurring prior and during the growth allowed us a significant improvement of the nanotube produc…
A theoretical study has been presented to show that it is possible to align three different diamagnetic susceptibility axes (chi(3) < chi(2) < chi(1) < 0) of a crystallite with respect to the laboratory coordinate system (x, y, z). The time-dependent magnetic field that periodically changes in direction and intensity…
We present a study of the aqueous solvation within self-assembled structures formed from peptide amphiphiles. We have placed tryptophan and pyrene chromophores onto the peptide backbone to enable spectroscopic examinations of the interior of the resulting supramolecular objects. Self-assembly constrains the chromophor…
The swelling behavior of poly(methacrylic acid) (PMAA) brushes covalently attached to solid planar surfaces in aqueous solutions containing different monovalent salts was investigated with multiangle null ellipsometry. The polymer chains were grown in situ from the surface by surface-initiated polymerization using a s…
XAFS spectra of palladium(II) in concentrated HNO3/HClO4 acid mixtures have been recorded and analyzed. Structural parameters of the Pd(H2O)4(2+) complex and the mixed nitric Pd(NO3)2(H2O)2 complex, for the first time, were determined by the XAFS method. For pure 5 M HClO4 and for mixtures (0-0.3 M HNO3), the XAFS spe…
We demonstrate a facile solution-phase method for the synthesis of single-crystal, high aspect ratio, and ultrathin nanowires of hexagonal-phase Cu2S by thermal decomposition of CuS2CNEt2 in a mixed surfactant solvent of dodecanethiol and oleic acid at 160 degrees C. Cu2S nanowires can be controllably synthesized with…
The heteroepitaxial growth of crystalline core-shell nanostructures of a variety of materials has become possible in recent years, allowing the realization of various novel nanoscale electronic and optoelectronic devices. The increased surface or interface area will decrease the thermal conductivity of such nanostruct…
UHV dynamic force and energy dissipation spectroscopy in non-contact atomic force microscopy were used to probe specific interactions with composite systems formed by encapsulating inorganic compounds inside single-walled carbon nanotubes. It is found that forces due to nano-scale van der Waals interaction can be made…
We report a successful synthesis of monodisperse L10-FePt nanocrystals which are not only superior in magnetism but also easy to handle through being dispersible in solvents. Thanks to a thick SiO2-coating, the thermal treatment needed to form the L10 structure can be done even at 900 oC without inducing coalescence a…
Delicate hollow ZnO urchins have been fabricated by thermal evaporation of metallic zinc powders in a tube furnace without the use of additive, high temperature, or low pressure. The phase transformation, morphologies, and photoluminescence evolution of the ZnO products were carefully studied and investigated with X-r…
Covalently functionalized Laponite clay was synthesized through a condensation reaction of the clay's silanol groups with mono- and trifunctional alkoxy silanes. Most of the work focuses on primary-amine-containing modifications because that group offers a wide range of derivitization options. Various 3-aminopropyltri…