Materials Literature
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Abstract Serine proteases, ubiquitous enzymes known to function in digestion and immune protection in both vertebrates and invertebrates and implicated in regeneration in some species, were investigated in the California blackworm, Lumbriculus variegatus. Several serine proteases, rather than a single enzyme with broa…
The increasing demand for sustainable and green energy supply spurred the surging research on high-efficiency, low-cost photovoltaics. Colloidal quantum dot solar cell (CQDSC) is a new type of photovoltaic device using lead chalcogenide quantum dot film as absorber materials. It not only has a potential to break the 3…
Abstract Carbon nanowalls (CNWs) were grown by atmospheric dc plasma enhanced chemical vapour deposition method. Maintaining plasma at atmospheric pressure give us possibility to synthetize CNWs at high rate. By using two different liquid carbon sources we can control CNWs density. Growth of sparsely distributed CNWs…
L-Proline supported on nano gold surface in PEG-400 catalyst system has been developed for use in the direct aldol condensation of acetone with aldehydes. Successful immobilization on surface of gold nanoparticles was confirmed using multiple analytical techniques. The supported catalyst could be separated from the re…
Spongy graphene (SG), a nanoporous material with a high surface area, is used as a versatile and recyclable sorber. On page 4421, Litao Sun, Rodney S. Ruoff, and co-workers report that SG shows highly efficient absorption of petroleum products, fats, and toxic solvents and can be regenerated by heat treatment, yieldin…
Video camera analysis was used to measure the number of bounces of water droplets and modified water droplets on a range of superhydrophobic surfaces with different surface microstructures from rounded to ridge-like to needle-like. It was found that the number of bounces could be related to the static water contact an…
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
A core/sheath nanofiber membrane with poly[bis(p-methylphenoxy)]phospha-zene (PMPPh) as the sheath and easily spinnable polyacrylonitrile (PAN) as the core was prepared via a coaxial electrospinning process. Field-emission scanning electron microscopy and transmission electron microscopy were used to characterize the…
On the basis of the energetics and magnetic exchange interactions obtained from large-scale first-principles electronic structure calculations, a gallium-vacancy clustering model is proposed for the origin of colossal magnetic moments and high-temperature magnetism in gadolinium-doped gallium nitride. Monte Carlo simu…
Abstract The nucleating ability of p ‐cyclohexylamide carboxybenzene (β‐ NA ) towards isotactic polypropylene ( iPP ) was investigated by differential scanning calorimetry, X‐ray diffraction, polarized optical microscopy and scanning electron microscopy. β‐ NA is identified to have dual nucleating ability for α‐ iPP a…
High-pressure steam treatment (HPST) is a potential alternative method for the modification of lignocellulosic materials. The effect of HPST on oil palm mesocarp fibers (OPMF) was successfully investigated with treatment conditions of 170 ºC/ 0.82 MPa, 190 ºC/ 1.32 MPa, 210 ºC/ 2.03 MPa, and 230 ºC/ 3.00 MPa for 2 min…
This work establishes a modified atomic layer deposition (ALD) method, adding a rapid high temperature annealing step during every cycle of deposition without adding significant time to the overall reaction. To achieve the ultrafast heating requirement, an in situ flash lamp annealing (FLA) apparatus was designed and…
Crystallization and oriented attachment of monohydrocalcite (MHC) for the self-organization of dumbbell-like superstructures in the absence of any additives, as well as the crystalline phase transformation of MHC to anhydrous calcium carbonate (CaCO3), have been systematically described in this paper. In Mg2+-containi…
A detailed structural analysis of the antiferromagnetic (G z -type) lanthanum doped bismuth ferrite - Bi 0.5 La 0.5 FeO 3 ( Pn′ma′ ) – using variable-temperature powder neutron diffraction is reported. The analysis highlights a structural link between changes in the relative dielectric permittivity and changes in the…
Six-coordinate distorted octahedral tetracyanidonitridorhenium(V) and -technetium(V) complexes with a volatile organic compound (VOC) coordinating at the trans position of a nitrido ligand, (PPh4)2[MN(CN)4L] (M = Re, L = MeOH, EtOH, acetone, or MeCN; M = Tc, L = MeOH), and five-coordinate square-pyramidal tetracyanido…
Protein-protein interactions play a pivotal role in a large number of biological processes exemplified by the assembly of the cellulosome. Integration of cellulosomal components occurs through the binding of type I cohesin modules located in a non-catalytic molecular scaffold to type I dockerin modules located at the…
Self-assembled strongly coupled plasmonic aggregates exhibit optical spectra which show complex plasmonic resonances. To understand the optics of such systems, we introduce an effective composite dipole model extending previous effective models of aggregates into the plasmonic domain. The ingredients in this model are…
In this work, we present a comprehensive combined modelling approach to study the annealing of lattice defects in dilute and concentrated metallic alloys. The developed approach consists in the combination of molecular dynamics, atomistic kinetic Monte Carlo (AKMC) and mean field rate theory methods, linked at appropr…
A spherical polycationic brush (SPB) is made by graft-polymerizing a cationic monomer onto the surface of a 100 nm polystyrene bead. It is possible to adsorb anionic liposomes (40-60 nm diameter) onto the SPBs while maintaining the liposome integrity. The liposomes were constructed with phosphatidyl choline (PC) admix…
The design and fabrication of graphene-based micro-supercapacitors are reported on page 4501 by Majid Beidaghi and Chunlei Wang. Addition of carbon nanotubes (CNTs) between the graphene sheets and the arrangement of electrodes in a side-by-side structure increases the accessibility of electrode materials. A two-step f…