Seed-mediated synthesis of Ag nanocubes with controllable edge lengths in the range of 30-200 nm and comparison of their optical properties.
Seed-mediated synthesis of Ag nanocubes with controllable edge lengths in the range of 30-200 nm and comparison of their optical properties.
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DOI：
10.1021/ja104931h
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发表时间：
2010-08-18
影响因子：
15
通讯作者：
Xia, Younan
中科院分区：
文献类型：
--
作者：
Zhang, Qiang;Li, Weiyang;Moran, Christine;Zeng, Jie;Chen, Jingyi;Wen, Long-Ping;Xia, Younan
采用晶种生长法合成了边长在30-200 nm范围内可控的银纳米立方体。这种合成成功的关键是使用单晶Ag种子来指导生长，并使用AgNO 3作为元素Ag的前体，其中副产物HNO 3可以阻止单晶种子均匀成核和演变成孪晶纳米颗粒。球形（立方八面体形状）或立方晶种可用于该生长过程。所得Ag纳米立方体的边长可以通过改变所使用的Ag晶种的量、添加的AgNO 3的量或两者来容易地控制。首次获得了边长在30-200 nm范围内可控的均匀银纳米立方体，并比较了它们的局域表面等离子体共振和表面增强拉曼散射特性。
Silver nanocubes with edge lengths controllable in the range of 30–200 nm were synthesized using an approach based on seeded growth. The key to the success of this synthesis is the use of single-crystal Ag seeds to direct the growth and the use of AgNO3 as a precursor to elemental Ag where the by-product HNO3 can block both the homogeneous nucleation and evolution of single-crystal seeds into twinned nanoparticles. Either spherical (in the shape of cubooctahedron) or cubic seeds could be employed for this growth process. The edge length of resultant Ag nanocubes can be readily controlled by varying the amount of Ag seeds used, the amount of AgNO3 added, or both. For the first time, we could obtain Ag nanocubes with uniform edge lengths controllable in the range of 30–200 nm and then compare their localized surface plasmon resonance and surface-enhanced Raman scattering properties.
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