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991.
C. Raghu Indranil Rudra Diptiman Sen S. Ramasesha 《Journal of Chemical Sciences》2001,113(5-6):459-486
One of the fascinating fields of study in magnetism in recent years has been the study of quantum phenomena in nanosystems.
While semiconductor structures have provided paradigms of nanosystems from the stand point of electronic phenomena, the synthesis
of high nuclearity transition metal complexes have provided examples of nano magnets. The range and diversity of the properties
exhibited by these systems rivals its electronic counterparts. Qualitative understanding of these phenomena requires only
a knowledge of basic physics, but quantitative study throws up many challenges that are similar to those encountered in the
study of correlated electronic systems. In this article, a brief overview of the current trends in this area are highlighted
and some of the efforts of our group in developing a quantitative understanding of this field are outlined. 相似文献
992.
A comparative analysis is made of the infinite-fiber and finite-fiber models in the three-dimensional theory of stability
of composites. The results analyzed have been obtained using the three-dimensional linearized theory of stability of deformable
bodies. A historical sketch is given of the theory of stability for and approaches used in the mechanics of laminated and
fibrous composite materials
Translated from Prikladnaya Mekhanika, Vol. 44, No. 8, pp. 3–31, August 2008. 相似文献
993.
994.
995.
996.
B. Ruzicka A. Brglez B. Malic L. Degiorgi D. Mihailovic 《The European Physical Journal B - Condensed Matter and Complex Systems》2000,13(2):205-208
We present the results of a dc transport and optical investigation of WO3 and NaxWO3 with x
=0.01. Upon Na-doping we find a (Drude) metallic component in the optical conductivity, while the transport data display a crossover
from an activated to a variable range hopping regime around 210 K. We suggest the possible formation of polarons (and bipolarons)
and speculate that superconductivity could be induced, provided the dc percolation threshold is achieved.
Received 28 March 2000 相似文献
997.
本文论述了用显微金刚石池研究高分子弹性材料,方法简便、快速和精确。 相似文献
998.
本文将报告对硅纳米线、多孔硅、Si C纳米棒和碳纳米管等一维纳米体系的本征拉曼光谱及其特征的研究结果 ,并讨论拉曼光谱在上述材料的几何和物理特性研究中的应用。 相似文献
999.
Lowe Terry C. Bishop Alan Burns Carol Hartford Allen Parkin Don Trewhella Jill 《Journal of nanoparticle research》2000,2(3):249-266
Research in the emerging field of nanoscale science and technology has grown steadily at Los Alamos National Laboratory since 1990. This article summarizes some of this work, examining research highlights within the seven key categories of nanoscience in which Los Alamos has ongoing projects, capabilities, and facilities: (1) Materials and chemistry, (2) Theory and modeling, (3) Bioscience, (4) Investigative tools and facilities, (5) Sensors and devices, (6) Synthesis and fabrication, and (7) Education and outreach. Future research horizons are indicated throughout while institutional strategies for advancing nanoscale science are summarized at the end. 相似文献
1000.
Stephen R. Elliott C. N. R. Rao John M. Thomas 《Angewandte Chemie (International ed. in English)》1986,25(1):31-46
This article sets out to describe and account for the chemical and physical consequences of the presence of gross disorder in solids. Knowledge of the structure of such disordered materials is an obvious prerequisite to a further understanding of other properties and behavior, and our current knowledge of the structure of various noncrystalline systems is discussed together with the experimental techniques which need to be employed in order to obtain such information. The so-called glass transition, which takes place as a liquid is supercooled below the crystallization temperature, is discussed in terms of the various models which have been proposed to account for this phenomenon. The effect of noncrystallinity on electronic properties is also discussed, and we highlight new developments in the understanding of electron localization and transport processes. Finally, two applications of amorphous solids are considered in some detail: optical fibers for use in communication networks and “superionic” glasses for possible use in solid-state batteries. 相似文献