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。
With the surge in energy demand in developing Southeast Asia, the propensity of using nuclear energy as an option is growing. Singapore needs to adapt itself and explore the benefits of a 'nuclearised' region.
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2009.
Amorphous chalcogenide As2S3, As2Se3, GeS2, GeSe2, Ge20As25S55, Ge20As25Se55, Ge10As40S20Se30 films were studied by femtosecond OHD-OKE. Ict was indicated that the third-order nonlinear susceptibility χ(3) was as large as 10-12 esu, and they also exhibited a very fast response time shorter than 200 fs. Their nonlinear…
This paper studies the performance of unbuffered and buffered, packet-switching, multistage interconnection networks. We begin by reviewing the definition of banyan networks and introducing some generalizations of them. We then present an asymptotic analysis of the performance of unbuffered banyan networks, thereby so…
The hypothesis of this paper is that when metallic nanoparticles are grouped together by suitable field coupling\nthey can behave like larger objects which will resonate at microwave frequencies. This means that sheets of nanomaterials\ncan be designed that are largely transparent at these spectra except where an ante…
We have studied the spontaneous fluctuation noise spectrum of （Ga,Mn）As in frequency domian from 1 kHz to 250 kHz. We found that the electronic noise can be reduced by a magnetic field and its magnitude increases with increasing temperature of the （Ga,Mn）As sample. The electrical noise spectra at different frequencies…
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2009.
Diese Schrift beschreibt Untersuchungen zur Bildung und Manipulation von Carbon Nanotube (CNT) Netzwerken in Epoxidharzen. Der Fokus liegt dabei auf der Verbesserung der elektrischen Eigenschaften des CNT/Epoxy-Verbundwerkstoffe. Unterschiedliche Forschungsfelder (Elektronenmikroskopie, Raman Spektroskopie, Rheologie)…
This chapter contains sections titled: General Introduction Light Modulation Direct overwrite on Exchange-Coupled Multilayered MO Disk High-Density Recording on a LIM-DOW Disk References ]]>
A novel side-chain conjugated polythiophene derivative poly［3-（5′-octyl-thienylene-vinyl）-thiophene］ （POTVTh） was synthesized. The polymer films showed a broad absorption band and a narrow bandgap of about 1.82 eV. The third order nonlinear optical properties of the film were measured by Z-scan technique at 800 nm, wh…
This paper introduces a new mixture of peptide derivatives, bearing allyl groups, temporarily named allyl fibroin peptide (AFP), fabricated via reaction of low-molecular-weight fibroin peptides (FP) with allyl chloride in a water/ethanol solvent system. The optimal parameters of the preparation were determined through…
A series of high rate growth μc-Si:H thin films with different thicknesses were deposited by very high frequency plasma enhanced chemical vapor deposition （VHF-PECVD） process with high power and high pressure. The microstructure of the μc-Si:H thin films was studied by the Raman and XRD spectra. It was found that the…
Le diboride de magnésium a été découvert comme étant un simple supraconducteur intermétallique en 2001 avec la plus haute température de transition à date de 39 K. En raison de sa haute température de transition, de nombreuses recherches ont été faites sur la synthèse et la modification de ce composé binaire et pour m…
A hydrophilic polysaccharide derived from chitin, chitosan has gained increasing popularity in biomedical applications such as tissue engineering, wound dressing, and drug delivery because of its presumed biocompatibility. These applications were founded on chemical similarities between chitosan and cell surface carbo…
hole (or aperture) or through arrays of subwavelength holes in metal films have spurred on intense research activities into understanding and utilizing this phenomenon. The main findings of those recent works are that elliptical or rectangular holes can dramatically influence on the intensity of the transmission. Late…
Transport by pipelines is more used at the present time to transfer liquid or gas sources of energy from the location of extraction to the region of use. With the reduction of oil reserves, hydrogen became an interesting source of energy. To avoid any risk of explosion or escape during hydrogen transport and to reduce…
In this thesis thermal properties of low dimensional structures were experimentally studied at low temperatures with the help of tunnel junction thermometry and the Joule heating technique. The main objects of study were electron-phonon coupling in disordered thin metal films and phonon transport in suspended silicon…
Complexes of composition [NbCl 4 (OC 6 H 4 C(CH 3 ) 3 -2)] and [NbCl 3 (OC 6 H 4 C(CH 3 ) 3 -2) 2 ] have been synthesized from the reaction of niobium pentachloride with equimolar and bimolar amounts of 2-tert-butylphenol in carbon tetrachloride. The complexes have been characterized by physicochemical, IR, 1 H and 13…
A damage model based on Gologanu-Leblond-Devaux constitutive law, extended to account for strain hardening, is integrated with a homogenization scheme in order to investigate the ductile fracture of multiphase and composite metallic alloys. The homogenization scheme supplies the ductile fracture model with an accurate…
Magnesium and its alloys are characterised by a low density. The use of magnesium alloys as a lightweight construction material is growing rapidly. The processing is mostly done by high pressure die casting, since the processing by bulk and sheet forming processes is hindered by the specific physical properties of mag…