Materials Literature
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Abstract Over the last decade, the simulation package Predici has evolved from a solver for population balances describing molecular weight distributions in polymer reaction kinetics to a comprehensive tool for nearly all kinds of polymer processes. The key to Predici's wide‐spread applicability might be its modular i…
A diboron compound with both 3-coordinate boron and 4-coordinate boron centers, (5-BMes2-2-ph-py)BMes2 (1) and its monoboron analogue, (2-ph-py)BMes2 (2) have been synthesized. Both compounds are luminescent but have a high sensitivity toward light. UV and ambient light cause both compounds to isomerize to 1a and 2a,…
The visualization at near atomic resolution of transient substrates in the active site of enzymes is fundamental to fully understanding their mechanism of action. Here we show the application of using CO(2)-pressurized, cryo-cooled crystals to capture the first step of CO(2) hydration catalyzed by the zinc-metalloenzy…
A series of novel electroactive and photoactive conjugated copolymers based on N-alkyl dithieno[3,2-b:2',3'-d]pyrroles (DTP) and thiophene (TH) units (DTP-co-THs) were synthesized using a Stille coupling reaction and exhibited molecular weights of 1.6 x 10(4) to 5.0 x 10(4) g/mol. The incorporation of soluble substitu…
We report here our systematic studies of excited-state dynamics of two common flavin molecules, FMN and FAD, in five redox states--oxidized form, neutral and anionic semiquinones, and neutral and anionic fully reduced hydroquinones--in solution and in inert protein environments with femtosecond resolution. Using prote…
The administration of therapeutic cell types, such as stem and progenitor cells, has gained much interest for the limitation or repair of tissue damage caused by a variety of insults. However, it is still uncertain whether the morphological and functional benefits are mediated predominantly via cell differentiation or…
Significant effort is currently focused on microbial fuel cells (MFCs) as a source of renewable energy. Most studies concentrate on operation at mesophilic temperatures. However, anaerobic digestion studies have reported on the superiority of thermophilic operation and demonstrated a net energy gain in terms of methan…
Copper nanoparticles are being given considerable attention as of late due to their interesting properties and potential applications in many areas of industry. One such exploitable use is as the major constituent of conductive inks and pastes used for printing various electronic components. In this study, copper nano…
Plasmonic photocatalyst [email protected], in which Ag nanoparticles are deposited on the surfaces of AgCl particles (SEM image depicted), was prepared by treating Ag2MoO4 with HCl to form AgCl powder and then reducing some Ag+ ions in the surface region of the AgCl particles to Ag0. This photocatalyst is highly effic…
An iodine-modified Au(111) surface, (I/Au(111)), was used as a substrate to prepare a C 60 adlayer by self-organization in a benzene solution. A highly ordered C 60 adlayer was successfully prepared due to the moderate C 60-I/Au(111) interaction. Two lattice structures, (2 square root 3 x 2 square root 3) R30 degrees…
Electrical transport and specific heat properties of Nd_{1-x}Pb_{x}MnO_{3} single crystals for 0.15 < x 0.5 have been studied in low temperature regime. The resistivity in the ferromagnetic insulating (FMI) phase for x < 0.3 has an activated character. The dependence of the activation gap Delta on doping x has been de…
We studied the effect of the substrate on the surface-enhanced Raman scattering (SERS) signals of metallic nanocrystal films by making a direct comparison between cases with metallic and semiconducting substrate surfaces. Ag nanoparticles smaller than 10 nm were synthesized and uniform arrays were formed on both ultra…
Abstract We studied a NanoBud structure in a local‐scale using high resolution transmission electron microscopy (HRTEM), scanning tunnelling microscopy (STM) and Raman spectroscopy. The HRTEM images show fullerenes on the outer surface of a single‐walled carbon nanotube (SWCNT) and the bonding between the fullerenes a…
Surface assisted self-assembly of detonation nanodiamond particles (with typical sizes in the range 4-10 nm) has been obtained using different fractions of colloidal aqueous dispersions as starting material. The relationship between dispersion properties and structure/geometry of the aggregates deposited on Si or glas…
We report the observation of a strong coupling between an artificial "atom" and localized interface mode in the microwave regime. Transmittance is experimentally measured for the effective near-zero-index paired structures containing epsilon -negative and mu -negative materials made of composite right- and left-handed…
Abstract Capillary reactions of single‐walled carbon nanotubes have been investigated both in ferrocene‐saturated acetone and in ferrocene vapor. The encapsulations of ferrocene are observed as subsequent growth of inner shell tubes. From Raman spectroscopy we show that the filling yield is about ten times higher with…
Monte Carlo (MC) simulation studies of isotopic mass effects have been conducted, for low-energy channeling of 12 C and 13 C ions in single-wall carbon nanotubes. It is found in MC simulations that (Ψ C for 12 C /Ψ C for 13 C ) = (13/12) 1/2, for the same incident energies. Here, Ψ C for 12 C is the critical angle for…
Lebende Schablone: Citratstabilisierte Gold-, Silber-, Platin- und Palladium-Nanopartikellösungen wurden synthetisiert und als Wachstumsmedien für Pilze verwendet. Die Nanokristalle lagern sich teilweise an das Mycel an, wodurch eine Hybridstruktur aus biologischem Templat und Nanoteilchenhülle entsteht. Die Partikel…
We report dynamic Monte Carlo simulations of polymer crystallization confined softly in cylindrical microdomains of diblock copolymers. We observed both the breakout that generally raises coalescence of microdomains and the breakdown that uniquely turns cylinders into strings of single crystallites. They can be monito…
X-ray diffraction measurements at high pressures and high temperatures revealed that Si clathrate Ba 8Si 46 is formed by a solid-phase reaction of an 8:30 molar mixture of SrSi 2-phase BaSi 2 and Si after BaSi 2 undergoes the BaSi 2-to-EuGe 2 and the EuGe 2-to-SrSi 2 transitions. The volume reduction during the format…