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 mechanisms for the resistance to sulfur poisoning at the triple phase boundary (TPB) of the Ni/yttria-stabilized zirconia (YSZ) system treated with Sn vapor are studied using the first-principles method based on density functional theory. Models with Sn dopant or adsorbate are proposed. It is found that the TPB mo…
After ligand exchange with PEG, Au NPs with differently mixed surface functionalities co-exist in the as-synthesized sample. It is found that the poorly grafted nanoparticles can be simply removed using a chromatographic method, and the well grafted nanoparticles can be eluted as a function of the core size.
The aim of our study was to design and evaluate Amlodipine transdermal patches using polymers such as ethyl cellulose. Matrix type transdermal patches containing Amlodipine were prepared by solvent casting method by using polymers like ethylcellulose 1 %, 1.5 %, 2 % and 2.5 % and a total of eight formulations were pre…
Graphene-based device applications such as ultrafast transistors and photodetectors benefit from precise control over its carrier type and concentration as well as a combination of both high-quality p- and n-doped components with spatial control and seamless connection (p–n junctions/superlattices). However, this rema…
Coinage metal atom (Cu, Ag, Au) reactions with SO2 were investigated by matrix isolation infrared absorption spectroscopy and density functional theory electronic structure calculations. Both mononuclear complexes M(η(1)-SO2) (M = Ag, Au) and M(η(2)-O2S) (M = Ag, Cu) were observed during condensation in solid argon or…
Reverse-CD mimics with adaptable cavity sizes have been synthesized. The adaptability has been demonstrated through single crystal structure determination and guest binding studies.
A simple one-pot multi-component ROMP of hydrophilic, spiropyran (SP) and tert-butyloxycarbonyl-protected (Boc-protected) amino-functionalized norbornenes was developed, and a series of water-soluble copolymeric materials were provided. The photochromic SP moiety endows the copolymers the properties of switchable fluo…
C-5-bromo-2-hydroxyphenylcalix[4]-2-methylresorcinarene (I) was synthesized by cyclocondensation of 5-bromo-2-hydroxybenzaldehyde and 2-methylresorcinol in the presence of concentrated HCl. Compound I was characterized by infrared and nuclear magnetic resonance spectroscopic data. X-ray analysis showed that this compo…
Biofilms and filamentous communities provided favorable sites for silica precipitation on deeply weathered ignimbrites that make up the substrate at the hydrothermal field of El Tatio (Andean Cordillera, Chile). The amorphous silica encrustation enabled the preservation of a variety of biotic and abiotic features. An…
ABSTRACT A series of poly(3‐alkylthiophene)s (P3ATs) ( P1–P5 ) has been synthesized via a Ni(dppp)‐mediated polymerization, varying the bulkiness of the alkyl side chains in order to investigate the influence of the bulkiness of the alkyl substituent on the aggregation and magnetic properties of P3ATs. UV–Vis spectros…
Four cyano-bridged heterobimetallic trinuclear complexes, {[Ni(en)2][Fe(qcq)(CN)3]2}·2H2O (1) [en = 1,2-ethylenediamine; qcq− = 8-(2-quinoline-2-carboxamido)quinoline anion], {[Ni(teta)][Fe(qcq)(CN)3]2}·2DMF·2H2O (2) (teta = 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane, DMF = N,N-dimethylformamide), {[C…
We report measurements of the spatial dependence of the electron energy distribution in carbon nanotubes, from which electron interactions are determined. Using nonequilibrium tunneling spectroscopy with multiple superconducting probes, we characterize electron transport as ballistic or diffusive, and interactions as…
ABSTRACT A new monomer derivative of N ‐vinyl‐2‐caprolactam (VCL), namely 3‐( tert ‐butoxycarbonylmethyl)‐ N ‐vinyl‐2‐caprolactam (TBMVCL), was synthesized via nucleophilic substitution at the α‐carbon to the lactam carbonyl group. The monomer was copolymerized radically with VCL and the copolymer compositions were co…
ABSTRACT Soft composite materials combined with a holographic photopolymerization process are used for realizing an innovative switchable periodic structure made of slices of almost pure polymer alternated with films of well aligned nematic liquid crystals named POLICRYPS. It exhibits negligible scattering losses, whi…
We report a new photoinduced transition from a nonordered phase to a transient ordered phase with symmetry breaking in an organic charge-transfer compound, dimethyltetrathiafulvalene (DMTTF)-dibromodichloro-p-benzoquinone (2,6QBr(2)Cl(2)), which is a neutral compound located near the neutral-ionic phase boundary and s…
This paper presents a facile synthesis method for poly(methyl methacrylate-co-acetoacetoxyethyl methacrylate)–polystyrene popcorn-like particles by soap-free seeded emulsion polymerization. In this study, popcorn-like, raspberry-like and reverse core–shell structures of the P(MMA-co-AAEM)–PS particles could be obtaine…
Single crystalline Cu2O film has been successfully synthesized on MgO(100) surface through laser molecular beam epitaxy. In situ reflection high-energy electron diffraction was employed to study the epitaxial growth of Cu2O. The composition and structure of the Cu2O were studied in detail by in situ X-ray photoelectro…
Abstract The syntheses of gold nanoparticles (Au NPs) and gold quantum clusters (Au QCs) that employ cefadroxil (CFX; an antibiotic) as both reducing and capping agents are reported. The HAuCl 4 /CFX concentration, temperature, and pH are crucial factors in the modulation of the nucleation and growth kinetics of the r…
New insight into the defect chemistry of the tetragonal tungsten bronze (TTB) Ba(0.5-x)TaO(3-x) is established here, which is shown to adapt to a continuous and extensive range of both cationic and anionic defect stoichiometries. The highly nonstoichiometric TTB Ba(0.5-x)TaO(3-x) (x = 0.25-0.325) compositions are stab…
Recycled natural fi bers and biopolymers with sustainable, eco-friendly, and biodegradable properties are receiving increased attention. The moisture absorption and swelling of natural fi ber composites adversely infl uence their mechanical properties and applications. In this research, bio-based epoxy polymers that a…