Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Aluminum-substituted α-phase nickel hydroxide (Al−α-Ni(OH) 2 ) microspheres with high structural stability are synthesized, and their surface modification by CoOOH nanoparticles is made subsequently in order to improve their electrochemical performance. The morphology, microstructure, and chemical state of the Al−α-Ni…
Triphenylene derivatives possessing poly(ethylene oxide) (PEO) units exhibited discotic nematic (N D ) phases at room temperature. Unique phase transition from a N D phase to a hexagonal columnar (Col h ) phase was triggered by the addition of alkali metal salts. This phase transition was dependent on the type of the…
Two homochiral two-dimensional brick-wall complexes with only end-on azido bridges, [Cu3((R)-phea)2(N3)6]n (1) and [Cu3((S)-phea)2(N3)6]n (2) (phea=1-phenylethylamine), have been synthesized and structurally characterized. Magnetic studies show that both complexes are chiral ferromagnets with the magnetic transition t…
Single-crystalline CuS hexagonal nanoplates have been prepared through a facile chemical vapor reaction (CVR) process in which sulfur vapor reacted with copper films in a vacuum chamber at about 450 °C for about 7 h. The parent copper films were obtained on a silicon wafer or glass slide through vacuum evaporation of…
Using nonionic triblock copolymer F127 as a soft template and AAO membranes as hard templates, well-aligned free-standing mesoporous carbon nanofiber arrays have been fabricated on silicon wafer through a confined self-assembly process. Hexagonally arranged circular mesochannels locate at the edge of the carbon nanofi…
This paper reports a methodology for synthesizing and ordering gold nanorods into two-dimensional arrays at a water/hexane interface. This preparation method allows the systematic control of the nanoparticle film thickness. An investigation into the thickness-dependent surface-enhanced Raman scattering (SERS) of the a…
Vapor-phase polymerization is used for the first time to prepare ultrathin, polycrystalline conducting films of poly(3,4-ethylenedioxythiophene) (PEDOT). The polarized optical microscopy images (see figure) display the progress of crystalline growth at 30 °C: a) initial step of self-assembled PEDOT film formation (amo…
We report the development and characterization of pH-sensitive poly(2-tetrahydropyranyl methacrylate) [poly(THPMA)] nanospheres and demonstrate their feasibility as an effective drug delivery vehicle. Poly(THPMA) nanospheres were prepared using either the double emulsion or single emulsion method for the encapsulation…
PII signal transduction proteins are among the most widely distributed signaling proteins in nature, controlling nitrogen assimilation in organisms ranging from bacteria to higher plants. PII proteins integrate signals of cellular metabolic status and interact with and regulate receptors that are signal transduction e…
We have developed chitosan nonwoven micro/nanofiber mesh tubes and examined the effects of their mechanical strength and permeability on nerve regeneration. Chitosan nano/microfibrous tubes with a deacetylation rate (DAc) of 78% or 93% were prepared by electrospinning. A chitosan film tube with a DAc of 93% was also f…
We review the derivation of a phase field crystal (PFC) model from classical density functional theory (DFT). Through a gradient flow of the Helmholtz free energy functional and appropriate approximations of the correlation functions, higher order nonlinear equations are derived for the evolution of a time averaged de…
The lubrication properties of adsorbed poly(L-lysine)-graft-poly(ethylene glycol) in aqueous buffer solution were studied with the surface forces apparatus. In general, the polymer brushes revealed extremely low friction forces. Two distinct regimes could be identified. In response to lateral shear, the friction force…
Silk of Bombyx mori can be used as various biomaterials. Especially, it is useful as a protein for coating the surface of cell culture plates since the silk possesses a biocompatibility to the cultured cells. However, the cell-adhesive ability is weaker than collagen or fibronectin, which are used for coating the plat…
We calculate the photon emission rate from a general atomic system in the mass- proportional CSL model. For an isolated charged particle emitting kilovolt gamma rays, our results agree with those obtained by Fu. For a neutral atomic system, photon emission is strongly suppressed for photon wavelengths much larger than…
Biopolymers in the biosphere are well known to mediate the formation of a wide array of inorganic materials, such as bone, shells, lenses, and magnetic particles to name a few. Recently, in vitro experiments with biopolymers such as peptides, RNA, and DNA have shown that templating by these macromolecules can yield a…
Abstract The title of this note has a two-tiered interpretation. On the “use” level, it expresses my admiration for the ingenuity and elegance of Christopher Potts's paper, which is not diminished by the fact that I disagree with him practically across the board. On the “mention” level, my title denotes the key phrase…
We show that grains can be efficiently aligned by interacting with a subsonic gaseous flow. The alignment arises from grains having irregularities that scatter atoms with different efficiency in the right and left directions. The grains tend to align with long axes perpendicular to magnetic field, which corresponds to…
ZnO nanorod arrays on an ITO substrate and nanorod powder have been prepared via a chemical method in aqueous solution at low temperature. Two dimensions of composite nanorods in the arrays were obtained by controlling the reaction time. SEM, XRD, UV−vis transmission, and PL measurements have been utilized to characte…
We use scanning photocurrent microscopy (SPCM) to investigate the properties of internal p-n junctions in ambipolar carbon nanotube (CNT) transistors. Our SPCM images show strong signals near metal contacts whose polarity and positions change depending on the gate bias. SPCM images analyzed in conjunction with the ove…
Part I established, via extensive transmission electron microscopy investigations, that the type of dislocation structure formed in metals of medium-to-high stacking fault energy upon deformation in tension or rolling to moderate strain levels (≤0.8) depends strongly on crystallographic grain orientation. This paper a…