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 nose cap demonstrator named Nose_2 has been tested for the second time in the plasma wind tunnel (PWT) facility which is part of the sharp hot structure (SHS) technology project, focused on the assessment of the applicability of ultrahigh temperature ceramics (UHTC) to the fabrication of high performance vehicles…
Abstract Four thiocyanato complexes with Co II and Ni II , [Co(NCS) 2 (htm) 2 (H 2 O) 2 ][Co(NCS) 2 (H 2 O) 4 ] · H 2 O ( 1 ), [Ni(NCS) 2 (htm)(CH 3 OH) 2 (H 2 O)] ( 2 ), [Ni(NCS) 4 (Hhtm) 2 ] ( 3 ), and [Co(NCS) 2 (apm) 2 (H 2 O) 2 ] · 2H 2 O ( 4 ) (htm = hexamethylenetetramine, apm = 2‐aminopyrimidine), were synthes…
The range of activation barrier heights for the Johari-Goldstein (JG) relaxation in glasses is shown to overlap the range for the main (alpha) relaxation, but to be on the average somewhat lower. This suggests the JG relaxation, like the alpha, involve transitions between megabasins in the energy landscape, and that t…
Abstract A sonochemical technique is used for in situ coating of iron oxide (Fe 3 O 4 ) nanoparticles on outer surface of MWCNTs. These Fe 3 O 4 /MWCNTs were characterized using a high‐resolution transmission electron microscope (HRTEM), X‐ray diffraction, and thermogravimetric analysis. The as‐prepared Fe 3 O 4 /MWCN…
Abstract We investigate the effect of less 3d electrons on the electronic and magnetic properties of half‐Heusler alloys CoMn 1− x Nb x Sb in a wide concentration range using first‐principles density‐functional calculations within the generalized gradient approximation. Our calculations indicate that for x < 0.5 th…
Lecithin/dodecylamine/lactose mixtures in ethanol/aqueous media led to the formation of sponge mesoporous silica (SMS) materials by means of tetraethoxysilane (TEOS) as silica source. SMS materials show a "sponge-mesoporous" porosity with a pore diameter of about 5-6 nm, in accordance to the length of a lecithin bilay…
A practical method to fabricate SWNT-conducting polymer nano-composites through poly(ionic liquid)-mediated process is developed. It is demonstrated that the poly(ionic liquid) layer along and around SWNT not only gives the facility for good dispersion of SWNT, but also provides a functionality to interlink SWNT with…
The spinning process is an important process in the Textile Industry. The yarn (output) coming out of the spinning process has a unique relationship with the input fibers. The input and output properties show a non-linear relationship between them. Many techniques, such as multiple regression, Artificial Neural Networ…
A tremendous growth in the field of carbon nanomaterials has led to the emergence of carbon nanotubes, fullerenes, mesoporous carbon and more recently graphene. Some of these materials have found applications in electronics, sensors, catalysis, drug delivery, composites, and so forth. The high temperatures and hydroca…
The A-site-ordered perovskite YMn(3)Al(4)O(12) was prepared by high-pressure synthesis. Structural analysis with synchrotron powder X-ray diffraction data and the Mn L-edges X-ray absorption spectrum revealed that the compound has a chemical composition Y(3+)Mn(3+)(3)Al(3+)(4)O(2-)(12) with magnetic Mn(3+) at the A' s…
Abstract CO disproportionation produces carbon deposits that cover active sites and induce catalyst deactivation. However, understanding of this detrimental reaction on reduced ceria is deficient. Herein, the reversibility and reaction mechanism of CO disproportionation on reduced ceria are investigated. The reversibi…
A neutral polyfluorene derivative that contains 20 mol% 2,1,3-benzothiadiazole (BT) is synthesized by Suzuki cross-coupling polymerization. A cationic conjugated polymer A and an alpha-mannose-bearing polymer B are subsequently obtained through different post-polymerization methods. As a result of the charged pendant…
Alloyed Zn x Ti y O z nanostructures were prepared by a thermal condensation process employing ethanolic mixtures of zinc acetate dihydrate and titanium alkoxide, without additional use of additives. It has been found that the nanocrystal growth takes place at temperatures above 350 °C yielding cubic spinel Zn 2 TiO 4…
Abstract We report a metal‐free bpy‐bridged silsesquioxane displaying an efficient and tuneable blue‐to‐green emission (maximum quantum yield and luminance values of 0.22 ± 0.02 cd m –2 and 63 ± 3 cd m –2 , respectively) when excited by commercial InGaN light emitting diodes (LEDs) (385–405 nm). This is the highest qu…
Abstract The power factors of bismuth telluride nanowires were determined. Large‐scale thermopower measurements of the nanowire arrays were performed under a constant thermal gradient. The local electrical resistance of individual nanowires inside alumina matrix was investigated at ambient conditions by a conductive t…
This work presents some results on the non-isothermal crystallization kinetics of a recycled polypropylene (RPP) and recycled polypropylene/short bamboo fiber (RPPSBF) composites by using the differential scanning calorimetry at four different cooling rates (5, 10, 20, 40°C/min). Ozawa, Avrami, Jeziorny, Kissinger mod…
The anomalous Hall effect of wires patterned from (Co{90}Fe{10}/Pt){n} multilayers, with 10<or=n<or=50, is used to determine the magnetization process in a small volume of maze domains. Time-independent 1/f noise appears in samples with a quality factor Q<1 at points on the hysteresis loop where the magnetization reve…
Abstract We separate 15 μm to 32 μm thick macroporous Si films from n‐type crystalline Si wafers by electrochemical etching under back‐side illumination. These layers are surface passivated and have openings in the oxide, for local doping and contacting, over 1% of the cell area. We measure effective lifetimes within…
Hydrogen chemisorption and diffusion on Pt and Pd decorated MoO 3 (010) surfaces were examined using periodic density functional methods. The deposition of Pt and Pd on MoO 3 was first carefully investigated. The strong metal−support interactions were found to greatly reduce the catalytic activity of Pt and Pd atoms a…
A fluorescent material with methylene viologen units bonded into the pore walls of the mesoporous MCM-48 silica is synthesized using the method of periodic mesoporous organosilicas with bridging groups (PMOs), in which the methylene viologen units are located within the channel walls through the cohydrolysis and cocon…