Materials Literature
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Several sequencing projects unexpectedly uncovered the presence of genes that encode ribulose 1,5-bisphosphate (RuBP) carboxylase/oxygenase (RubisCO) in anaerobic archaea. RubisCO is the key enzyme of the Calvin-Benson-Bassham (CBB) reductive pentose phosphate pathway, a scheme that does not appear to contribute great…
Dramatic enhancement of the $n$-type conductivity of nanocrystalline diamond films by introducing up to $0.2\phantom{\rule{0.3em}{0ex}}\mathrm{at.}\phantom{\rule{0.2em}{0ex}}%$ of nitrogen into the film has been reported. Previously, there were some theoretical predictions about the change of electronic structure of t…
NAD-independent lactate dehydrogenases are commonly thought to be responsible for lactate utilization during the stationary phase of aerobic growth in Lactobacillus plantarum. To substantiate this view, we constructed single and double knockout mutants for the corresponding genes, loxD and loxL. Lactate-to-acetate con…
Magnetocaloric effect (MCE) in low-cost iron-based binary alloys R 2 Fe 17 (R = Y, Pr) has been investigated by measuring their magnetic properties. The Curie temperature of these alloys is found to be close to room temperature. The specific heat measurement of these materials indicates a second order ferromagnetic/pa…
A new technique for direct measurement and visualization of ion transport in electrochromic materials that will be instrumental in formulating and validating physics-based models of electrochemical reactions is presented (see Figure). Initial experimental and modeling results have been obtained by applying the method…
Suspended single-walled carbon nanotube devices comprised of high-quality electrical contacts and two electrostatic gates per device have been prepared. Compared to nanotubes pinned on substrates, the suspended devices exhibit little hysteresis related to environmental factors and act as cleaner Fabry-Perot interferom…
Mesoporous silica platelets with perpendicular nanochannels (see Figure) have been conveniently prepared by using a ternary cetyltrimethylammonium bromide–sodium dodecylsulfate–Pluronic123 surfactant system as a template and sodium silicate as the silica source. The diameter of the fabricated nanochannels is about 7.0…
A nonaqueous synthetic route for the preparation of a regular crystalline yttria mesostructure is presented. The reaction between yttrium alkoxides and benzyl alcohol results in the formation of a highly ordered lamellar nanocomposite consisting of yttria layers with a confined thickness of about 0.6 nm, separated fro…
Small-angle neutron scattering (SANS) has been used to investigate the conformation of linear and cyclic poly(dimethylsiloxane)s (PDMS) in chemically identical, undiluted blends. SANS measurements have been carried out on (1) linear hydrogenous (H) mixed with linear deuterated (D) PDMS and (2) cyclic H mixed with cycl…
An oxamato-bridged CoIICuII chain compound has been obtained via the self-assembly of mononuclear bis-bidentate copper(II) anionic building blocks and cobalt(II) cations. It is the first example of a heterobimetallic ferrimagnetic chain that incorporates slow magnetic relaxation behavior (see Figure).
It is well known that surface plasmon absorption (color) of Au nanoparticles highly depends on its size, shape, and surrounding surface environment, providing a great opportunity for the development of Au nanoparticles as a probe for chemical and biochemical sensing and as a building block for nano-optical devices. Cu…
One monolayer of C60 on one monolayer of hexagonal boron nitride on nickel is investigated by photoemission. Between 150 and 250 K the work function decreases and the binding energy of the highest occupied molecular orbital (HOMO) increases by approx. 100 meV. In parallel, the occupancy of the, in the cold state almos…
Gift wrapped: Biomolecules can be enveloped within an ultrathin shell of an aminopropyl-functionalized magnesium (organo)phyllosilicate to produce aqueous dispersions of discrete protein–inorganic nanoparticles. Similar procedures but with organoclay oligomers that have pendent long-chain hydrophobic moieties result i…
This Minireview details the design, synthesis, and self-assembly of a new class of crowded aromatics that form columnar superstructures. The assembly of these subunits produces helical and polar stacks, whose assembly can be directed with electric fields. In concentrated solutions, these self-assembled helical rods ex…
We have used kinetic Monte Carlo simulations to study the kinetics of unfolding of cross-linked polymer chains under mechanical loading. As the ends of a chain are pulled apart, the force transmitted by each crosslink increases until it ruptures. The stochastic crosslink rupture process is assumed to be governed by fi…
We study how the Mott metal-insulator transition (MIT) is affected when we have to deal with electrons with different angular momentum quantum numbers. For that purpose we apply ab-initio quantum-chemical methods to lithium rings in order to investigate the analogue of a MIT. By changing the interatomic distance we an…
We study how the Mott metal-insulator transition (MIT) is influenced when we deal with electrons with different angular momenta. For lithium we found an essential effect when we include $p$-orbitals in the description of the Hilbert space. We apply quantum-chemical methods to sodium rings and chains in order to invest…
In a state-update protocol for a system of $L$ asynchronous parallel processes that communicate only with nearest neighbors, global desynchronization in operation times can be deduced from kinetic roughening of the corresponding virtual-time horizon (VTH). The utilization of the parallel processing environment can be…
Recently there has been an accumulation of experimental evidence in the high temperature superconductors suggesting the relevance of electron-phonon coupling in these materials. These findings challenge some well-held beliefs of what electron-phonon interactions can and cannot do. In this article we review evidence pr…
We have investigated two-photon-induced photoluminescence images and spectra of single gold nanorods by using an apertured scanning near-field optical microscope. The observed PL spectrum of single gold nanorod can be explained by the radiative recombination of the electron-hole pair near the X and L symmetry points.…