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。
The Comment of Wendt et al.[1] on our Letter [2] primarily claims that the electron beam method that we use in our experiment to vary the density of bridging oxygen vacancies (O b vac) on rutile TiO 2 ð110Þ also leads to damage of the near-surface region.Contrary to this assertion, in a two-photon photoemission spectr…
Abstract Complex amphiphilic polymers were synthesized via core‐first polymerization followed by alkylation‐based grafting of poly(ethylene oxide) (PEO). Inimer 1‐(4′‐(bromomethyl)benzyloxy)‐2,3,5,6‐tetrafluoro‐4‐vinylbenzene was synthesized and subjected to atom transfer radical self‐condensing vinyl polymerization t…
We report beam splitting in a metamaterial composed of a silver-alumina composite covered by a layer of chromium containing one slit. By simulating distributions of energy flow in the metamaterial for H-polarized waves, we find that the beam splitting occurs when the width of the slit is shorter than the wavelength, w…
Abstract Polyaniline/multiwalled carbon nanotube (PANI/MWNT) composites were prepared by in situ polymerization. Scanning electron microscope, X‐ray diffraction, Fourier transform infrared, Uv‐Visible spectroscopy, Fluorescence spectrophotometry were done to characterize the PANI/MWNT composites. Thermal stability was…
A Comment on the Letter by C. M. Yim, C. L. Pang, and G. Thornton, Phys. Rev. Lett. 104, 036806 (2010). The authors of the Letter offer a Reply.Received 5 March 2010DOI:https://doi.org/10.1103/PhysRevLett.104.259703©2010 American Physical Society
In this study, focused beam reflectance measurement (FBRM) is used to achieve batch-to-batch product quality consistency in terms of crystal size distribution (CSD) in unseeded antisolvent crystallization. The method comprises three regions. Initially, sufficient internal seed crystals are generated through primary nu…
Line up! Two optical axes in nematic phases make high demands on the mesogen design. V-shaped, shape-persistent fluorenone nematogens have been shown to assemble in low-temperature nematic liquid-crystal phases with biaxial order (see figure).
Abstract The process parameters for production of solid‐state microcellular polycarbonate using subcritical CO 2 were explored. Sufficiently long foaming times were used to produce foams, where cell growth had completed, resulting in steady‐state structures. A wide range of foaming temperatures and saturation pressure…
AIMS: To examine the potential use of hemicellulose hydrolysate (HH) for the production of chitosan by Rhizopus oryzae and investigate the influence of contents in HH on mycelia growth and chitosan synthesis. METHODS AND RESULTS: Compared to xylose medium, HH enhanced mycelia growth, chitosan content and production of…
Cancer of the colon and rectum is the third most commonly diagnosed cancer and accounts for approximately 10% of all cancer-related deaths. Although surgical resection or radiotherapy are potentially curative for localized disease, advanced colon cancer is currently associated with poor prognosis. Therefore, the devel…
First-principles calculations show that free-electron carriers are induced in a few-layer graphite by applying an external electric field normal to the graphene plane. The electric field substantially shifts the nearly free electron (NFE) states downward, and the states are not distributed at atomic sites but in spaci…
Abstract A new triphenylamine‐based diamine monomer, 4,4′‐diamino‐2″,4″‐dimethoxytriphenylamine ( 2 ), was synthesized from readily available reagents and was reacted with various aromatic dicarboxylic acids to produce a series of aromatic polyamides ( 4a–h ) containing the redox‐active 2,4‐dimethoxy‐substituted triph…
Abstract New water‐soluble hyperbranched polyfluorenes bearing carboxylate side chains have been synthesized by the simple “A2 + B2 + C3” protocol based on Suzuki coupling polymerization. The linear polyfluorene analogue LPFA was also synthesized for comparative investigation. The optical properties of the neutral pre…
Abstract Novel amphiphilic diblock copolymers from a combination of hydrophobic‐functional poly(lactides) (PLAs) with hydrophilic‐functional PLAs or poly(malic acid), respectively, toward fully biodegradable materials for medical applications, such as micellar drug delivery systems, are reported for the first time. Th…
We report a modified seed-mediated approach for the synthesis of uniform Au nanocages (AuNCs). HAuCl(4) was reduced in an aqueous mixture of hexamethylenetetramine (HMT), poly(N-vinyl-2-pyrrolidone) (PVP), and AgNO(3). The nanocages were (54.6+/-13.3) nm in outer-edge length and about 12 nm in wall thickness. The stru…
In the series of polymeric spin-crossover compounds Fe(X-py)(2)[Ag(CN)(2))](2) (py=pyridine, X=H, 3-Cl, 3-methyl, 4-methyl, 3,4-dimethyl), magnetic and calorimetric measurements have revealed that the conversion from the high-spin (HS) to the low-spin (LS) state occurs by two-step transitions for three out of five mem…
A novel bimodal fluorescence/MRI probe based on a cyclodextrin scaffold has been synthesized and characterized. The final agent employs the fluorescein (F) functionality as a fluorescence marker and the Gd(III) complex of a macrocyclic DOTA-based ligand (GdL) having one aminobenzyl-phosphinic acid pendant arm as an MR…
We have extensively explored the high-pressure structures of transition-metal diborides (TMB(2), TM = Sc, Ti, Y, and Zr) stabilized with the AlB(2)-type structure at ambient pressure by using first-principles structural prediction. We find two novel high-pressure structures: (i) a monoclinic structure (C2/m, Z = 4) fo…
This paper evaluates the 2-hydroxyazobenzene platform for tailoring proton concentration pulses and oscillations with monochromatic light. The easily prepared 2-hydroxyazobenzenes exhibit large absorptions in the near-UV range. Photoisomerization was investigated by UV/Vis absorption, (1)H NMR spectroscopy, and steady…
Abstract Cellulose‐based fibers were prepared by electrospinning from cellulose dissolved in NaOH/urea in the presence of a small amount of polyol binders. The as‐spun products were examined with SEM. Pure cellulose solution did not produce fibrous materials, because it often formed spherical nanoparticles with diamet…