Photoinduced Shape Conversion and Reconstruction of Silver Nanoprisms
Photoinduced Shape Conversion and Reconstruction of Silver Nanoprisms
复制标题
银纳米棱柱的光致形状转换与重建
DOI：
10.1021/jp810711a
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发表时间：
2009-04-30
影响因子：
3.7
通讯作者：
Xu, Weiqing
中科院分区：
文献类型：
--
作者：
Tang, Bin;Xu, Shuping;Xu, Weiqing
在光诱导过程中，通过调节胶体中柠檬酸盐的浓度，得到了一系列形状各异的银纳米片。银纳米片的局部表面等离子体共振（LSPR）可以在740至440 nm范围内逐渐调谐。相反，LSPR带可以再次光介导到620-690 nm的长波长区域内，仅通过向胶体体系中添加更多的柠檬酸盐。初始的银纳米棱柱在光照作用下转变为盘状。在这种转换中，等离子体共振和光源的耦合效应加速了光热反应。随后，通过光转换，在更多柠檬酸盐的存在下，从纳米盘重建银纳米棱镜。
A series of shapes of silver nanoplates were achieved by adjusting the concentration of citrate in the colloid in the photoinduced process. The local surface plasmon resonance (LSPR) of the silver nanoplates could be tuned gradually in a range from 740 to 440 nm. In contrast, the LSPR band can be photomediated again to the long wavelength region within 620-690 nm only by adding more citrate to the colloidal system. The initial silver nanoprisms converted to the discal shape under the light effect. In this conversion, the coupling effect of the plasmon resonance and the light source speeds up the photothermal reaction. Subsequently, the reconstruction of silver nanoprisms from the nanodisks took place in the presence of more citrate through the photoconversion.