Materials Literature
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A highly porous electrospun poly(L-lactic acid) (PLLA) nanofibrous scaffold was used as a matrix for mineralization of hydroxyapatite. The mineralization process could be initiated by immersing the electrospun scaffold in the simulated body fluids (SBF) at 37 degrees C for varying periods of time. Scanning electron mi…
Isomerization of the ligand, followed by cooperative metal–ligand interactions leads to the ternary ensemble shown on the right, which has potential for the recognition and quantification of cysteine and homocysteine. The free ligand (left) is red-violet in solution, but when metal ions and cysteine or homocysteine ar…
In this work, the X-ray diffraction structure modeling was employed for analysis of hexagonally ordered large-pore silicas, SBA-15, to determine their pore width independently of adsorption measurements. Nitrogen adsorption isotherms were used to evaluate the relative pressure of capillary condensation in cylindrical…
Microelectronic circuits that retain their logic state when the power is off would permit entirely new kinds of computers. Ferromagnetic semiconductors might make this technology possible.
The microscopic polymer reference interaction site model theory of polymer nanocomposites composed of flexible chains and spherical nanoparticles has been employed to study second virial coefficients and spinodal demixing over a wide range of interfacial chemistry, chain length, and particle size conditions. For hard…
We have developed a new theoretical formalism for phonon transport in nanostructures using the nonequilibrium phonon Green's function technique and have applied it to thermal conduction in defective carbon nanotubes. The universal quantization of low-temperature thermal conductance in carbon nanotubes can be observed…
Recent experiments have proven that the quasiparticles in graphene obey a Dirac equation. Here we show that microwaves are an excellent probe of their unusual dynamics. When the chemical potential is small, the intraband response can exhibit a cusp around zero frequency Omega and this unusual line shape changes to Dru…
Electron transfer in biological molecules provides both insight and inspiration for developing chemical systems having similar functionality. Photosynthesis is an example of an integrated system in which light harvesting, photoinduced charge separation, and catalysis combine to carry out two thermodynamically demandin…
This paper reports a microfluidic method for fast continuous synthesis of Janus particles and three-phase particles with narrow size distribution. Synthesis of particles included emulsification of monomer liquids and in-situ photoinitiated polymerization of multiphase droplets. We show the strategy for precise control…
Silver nanostructures are containers for surface plasmons - the collective oscillation of conduction electrons in phase with incident light. By controlling the shape of the container, one can control the ways in which electrons oscillate, and in turn how the nanostructure scatters light, absorbs light, and enhances lo…
Although there are many methods of fabricating nanofibres, electrospinning is perhaps the most versatile process. Materials such as polymer, composites, ceramic and metal nanofibres have been fabricated using electrospinning directly or through post-spinning processes. However, what makes electrospinning different fro…
An isothermal titration calorimetric study of the binding of substrates and inhibitors to different complexes of tartrate dehydrogenase (TDH) from Pseudomonas putida was carried out. TDH catalyzes the nicotinamide adenine dinucleotide (NAD)-dependent oxidative decarboxylation of d-malate and has an absolute requiremen…
Neutron diffraction measurements on a powder sample of α-Tb 2 S 3 were performed. This material consists of a stacking of square lattice Tb1 and triangular lattice Tb2 planes and exhibits two magnetic phase transitions at ∼3.5 and ∼12 K. It was found that the Tb1 and Tb2 moments behave quite independently. The Tb1 mom…
Recent developments in fullerenes, nanotubes, nanodiamond, and carbon fibers are reviewed.Contributions by different authors are grouped into three sections on the synthesis, chemistry and physics, and device applications of these carbon nanomaterials.As well as covering the materials chemistry from the fundamental an…
A detailed understanding of the electronic structures of transition metal bis(dithiolene) centers is important in the context of their interesting redox, magnetic, and optical properties. The electronic structures of the series [M(mnt)2]n- (M = Fe - Zn; mnt = 1,2-S2C2(CN)2; n = 1, 2) were examined by a combination of…
Five Cu(I) complexes [Cu2(ttab)(CH3CN)2][BF4]2 (1), [Cu(2)(ttab)(PPh3)2][BF4]2 (2), [Cu2(ttab)I2] (3), [Cu2(ttab)(I3)2] (4), and [Cu2(ttab)(I)BF4]n (5) with 1,2,4,5-tetra(7-azaindolyl)benzene (ttab) have been synthesized and characterized. The structures of compound 1, 2, 4, and 5 have been determined by single-crysta…
We have studied by inelastic x-ray scattering, at wave vectors 1 nm < or =q< or =15 nm(-1), the high-frequency dynamics of epoxy-amine mixtures as the monomers irreversibly polymerize. We find that chemical bonding, while inducing molecular ordering on a mesoscopic length scale, also efficiently realizes the mechanism…
Time-resolved small-angle x-ray scattering measurements reveal that a long-lived intermediate bcc state forms when a poly(styrene-b-isoprene) diblock copolymer solution in an isoprene selective solvent is rapidly cooled from the disordered micellar fluid at high temperature to an equilibrium fcc state. The kinetics of…
Abstract Nanosized ZnS has been synthesized in the interlayer galleries of Mg–Al layered double hydroxides (LDHs) by a process involving ion exchange of a Mg 2 Al‐NO 3 LDH precursor with a zinc–citrate complex {Na 2 [Zn(C 6 H 4 O 7 )] · 3 H 2 O} followed by reaction between the intercalated [Zn(C 6 H 4 O 7 )] 2– anion…
Methanol is used in the industrial crystallization of l -serine to reduce solubility and thereby to enhance the recovery from aqueous solutions in which l -serine has been synthesized. Earlier research had shown that the crystal form obtained from such solutions can be either the anhydrous or the monohydrate form of l…