Metallic nanoparticles bridge the length scale between atoms and crystals,exhibiting mesoscopic properties unique to their size.Thus,they have generated much interest for their potential applications as chemical or biological sensors and particularly as waveguides for light in nanoscale structures.[Y.W.C.Cao,R.C.Jin,and C.A.Mirkin,Science 297,1536 (2002);H.J.Lezec et ai,Science 297,820 (2002);S.A.Maier,P.G.Kik,and H.A.Atwater,Appl.Phys.Lett.81,1714 (2002);J.M.Oliva and S.K.Gray,Chem.Phys.Lett.379,325 (2003)].One important direction of research into the properties of individual metal nanoparticles involves the controlled variation of their geometry,which can yield new and tunable optical properties that simple spherical configurations do not possess.[T.S.Ahmadi,Z.L.Wang,T.C.Green,A.Henglein,and M.A.Ei-Sayed,Science 272,1924 (1996)].A prime example of this is the core-shell nanostructure that has a central material surrounded by differing cladding layer.
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机译:金属纳米颗粒弥合了原子和晶体之间的长度尺度,展现了其尺寸所特有的介观特性。因此,它们作为化学或生物传感器,尤其是作为纳米结构中的光的波导的潜在应用,引起了人们的极大兴趣。 Jin and CAMirkin,Science 297,1536(2002); HJLezec et ai,Science 297,820(2002); SAMaier,PGKik,and HAAtwater,Appl.Phys.Lett.81,1714(2002); JMOliva和SKGray,Chem.Phys.Lett.379,325(2003)]。研究单个金属纳米粒子的特性的一个重要方向涉及其几何形状的受控变化,这可以产生新的和可调谐的光学特性,而简单的球形配置则不会[TSAhmadi,ZLWang,TCGreen,A.Henglein,and MAEi-Sayed,Science 272,1924(1996)]。这的主要例子是核-壳纳米结构,其中心材料被不同的分子包围。覆层。
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