Photoinduced shape evolution: From triangular to hexagonal silver nanoplates
Photoinduced shape evolution: From triangular to hexagonal silver nanoplates
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光诱导形状演化：从三角形到六边形银纳米板
DOI：
10.1021/jp0745081
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发表时间：
2007-12-13
影响因子：
3.7
通讯作者：
Lombardi, John R.
中科院分区：
文献类型：
--
作者：
An, Jing;Tang, Bin;Lombardi, John R.
成功地使用溶液相，我们已经制备了，在大量的，均匀的六边形银纳米片开发的银三角形纳米边缘，通过采用光诱导技术。利用紫外-可见光谱、透射电子显微镜和高分辨透射电子显微镜对生长过程进行了表征。紫外-可见光谱表明，六方银纳米片的三个谱带出现在341（弱），368（中），和498（强）nm。TEM图像显示六方银纳米片具有25.9 nm的平均边缘尺寸和15.7 +/-1.0 nm的厚度。还研究了从三角形纳米片到六边形纳米片的转换机制。三角形银纳米片首先通过柠檬酸三钠存在下的银颗粒的种子介导生长来制备。随后，三角形纳米片的截断导致六边形纳米片的形成。
Successfully using the solution phase, we have prepared, in large quantities, uniform hexagonal silver nanoplates developed from silver triangular nanoprims by employing a photoinduced technique. The growth process was characterized by ultraviolet-visible (UV-vis) spectroscopy, transmission electron microscope (TEM), and high-resolution transmission electron microscope (HRTEM). The UV-vis spectra showed that three bands of hexagonal silver nanoplates appear at 341 (weak), 368 (medium), and 498 (strong) nm. TEM images showed that hexagonal silver nanoplates had an average edge size of 25.9 nm and thickness of 15.7 +/- 1.0 nm. The mechanism of the conversion from triangular to hexagonal nanoplates has also been studied. Triangular silver nanoplates were at first fabricated through seed-mediated growth of silver particles in the presence of trisodium citrate. Subsequently, the truncation of triangular nanoplates led to the formation of hexagonal nanoplates.