Materials Literature
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We report on the synthesis and properties of a family of linear cyanide bridged mixed-valence heptanuclear complexes with the formula: trans-[L(4)Ru(II){(mu-NC)Fe(III)(NC)(4)(mu-CN)Ru(II)L'(4)(mu-NC)Fe(III)(CN)(5)}(2)](6-) (with L and L' a para substituted pyridine). We also report on the properties of a related penta…
Structure determination has been difficult for those proteins that are toxic to the cells and cannot be prepared in a large amount in vivo. These proteins, even when biologically very interesting, tend to be left uncharacterized in the structural genomics projects. Their cell-free synthesis can bypass the toxicity pro…
A model of covalent and ionic bond strength is proposed in terms of the tensile unbinding force by introducing the concept of the effectively bonded valence electron (EBVE) number of a chemical bond. Bond strength proves to be exclusively dependent on two microscopic parameters: bond length and EBVE number. This model…
Elastic wave characteristics of the heat conduction in low-temperature thin wires can be studied via a wave scattering formalism. A reaction matrix formulation of heat conductance modeled by elastic wave scattering is advocated. This formulation allows us to treat thin wires with arbitrary surface disorder. It is foun…
Abstract The dimeric CoW 5 Lindqvist‐type anion [{CoW 5 O 18 H} 2 ] 6– ( 1 ) has been obtained as a tetrabutylammonium (TBA) salt by addition of either [Co(MeCN) 4 (H 2 O) 2 ] 2+ or CoCl 2 to a “virtual” W 5 O 18 6– precursor generated by non‐aqueous hydrolysis of a mixture of (TBA) 2 WO 4 and WO(OMe) 4 . Analysis of…
We have developed an alternative self-assembly process to pattern different geometries with user-defined tunability across the micro and nanoscale. In this approach, field-induced assembly of colloidal magnetic nanoparticles within a microfluidic channel is used as a tunable mask for near-field lithography. We have fa…
The fibers for specific textile end-use applications will be selected basically through their mechanical properties. They are key elements in fiber selection for successful applications. The way a single fiber behaves when it breaks is a good indicator of the mechanical properties whereby the results can be correlated…
We investigated through noncommercial calorimetry and elastoacoustic Brillouin experiments the phase diagram of n-butanol and measured the specific heat and the thermal conductivity in a wide low-temperature range for its three different states, namely, glass, crystal, and the so-called "glacial" states. The main aim…
Abstract Block copolymers of polystyrene and poly( tert ‐butyl methyacrylate) were prepared by ATRP. Halogen atoms at the chain ends were transformed into azide groups to obtain N 3 terminated block copolymers, which were connected to the surface of multi‐walled carbon nanotubes (MWNTs) by reacting N 3 with MWNT's s…
Abstract Diblock copolymers, in which both blocks are composed of aliphatic polyesters, were synthesized from two different alkyne‐functionalized δ‐valerolactone monomers by ring opening polymerization and subsequent click cycloaddition. Trimethylsilyl protection of the alkyne functionality of one block was instrument…
Abstract Aromatic poly(amide‐imide)s (PAIs) are high‐performance materials with a good compromise between thermal stability and processability when compared with polyamides or polyimides of analogous structures. In addition, the incorporation of photosensitive functional groups and chiral segments into the polymer bac…
Abstract Edge‐plane pyrolytic graphite (EPG) electrodes coated with5,10,15,20‐tetrakis(4‐hydroxy‐3‐methoxyphenyl)porphyrin[H 2 T3M4HPP] and its Fe III , Co II , Ni II and Cu II analogs undergo an electrochemical/chemical/electrochemical (ECE) reaction when anodically scanned in 0.5 M H 2 SO 4 . The new redox couple fo…
Distinguishing between carbon nanotubes (CNTs) according to their individual electronic properties is of significant importance for developing CNT-based electronics and devices. In this study, selective removal of metallic CNTs from CNT mixtures on silicon substrates was investigated using controlled laser irradiation…
We have studied the influence of nitrogen on the chemical properties of the hydrogenated carbon nitride (a-CN(x):H) film deposited by CH(4)/N(2) dielectric barrier discharge (DBD) plasma. X-ray photoelectron spectroscopy (XPS) indicates that carbon and nitrogen form an unpolarized covalent bond in these C-N(x) materia…
Undoped, Tb(3+)- and Eu(3+)-doped ZnGa(2)O(4) colloidal nanocrystals were synthesized by a nonhydrolytic hot solution chemistry. Undoped nanocrystals exhibited an intrinsic blue emission peaking at 437 nm by self-activated transition. The emissions of Tb(3+)-and Eu(3+)-doped ZnGa(2)O(4) nanocrystals consisted of their…
The structure of aromatic residues in spider silk has remained relatively uncharacterized. This is primarily due to the relatively low abundance of aromatic residues in dragline spider silk. NMR characterization has been further hindered by the inability to (13)C-isotopically enrich these amino acids in the silk effec…
The dissociation paths and thermochemistry of nitric oxide (NO) on flat, close-packed Rh(111) and on stepped Rh(211) surfaces have been investigated. Self-consistent, periodic, density functional theory (DFT-GGA) calculations, using both PW91 and RPBE exchange-correlation functionals, have been employed to determine b…
The diffusion of water in a phase-separated biodegradable poly(ester urethane) shape-memory polymer with poly(epsilon-caprolactone) (PCL) as the soft segment was investigated using time-resolved FTIR-ATR. On the basis of the band fitting and water ordering in drawn films, the broad water band in the 3800-2800 cm(-1) r…
We calculate the parameters for Hubbard models of $\ensuremath{\kappa}\text{\ensuremath{-}}{(\text{BEDT-TTF})}_{2}X$ and $\ensuremath{\beta}\text{\ensuremath{-}}{(\text{BEDT-TTF})}_{2}X$. We use density-functional theory (DFT) to calculate the interactions between holes in dimers of the organic molecule bis(ethylenedi…
This work explores the synthesis of walnut-like CdS micro-particles (MPs)/single-walled carbon nanotube (SWCNT) hybrids via one-step hydrothermal methods and their optical and optoelectronic properties. The mechanism of stable attachment to obtain a CdS MPs composite material is revealed. To overcome the specific prob…