Formation of silver nanoprisms with surface plasmons at communication wavelengths
Formation of silver nanoprisms with surface plasmons at communication wavelengths
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DOI：
10.1002/adfm.200500667
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发表时间：
2006-04-04
影响因子：
19
通讯作者：
Liz-Marz치n, LM
中科院分区：
文献类型：
--
作者：
Bastys, V;Pastoriza-Santos, I;Liz-Marz치n, LM
在不同的光照条件下，通过光诱导法的改进，制备了具有强近红外吸收的银纳米棱镜。采用低强度发光二极管和结合不同滤色片的白光作为光源。发现纳米棱镜的横向尺寸与发射波长和主平面内偶极等离子体带的位置呈拟线性相关。利用扫描电子显微镜对银纳米颗粒进行了结构表征。，透射电子显微镜（TEM），高分辨率TEM。电子衍射结果表明，颗粒呈平面状，具有单晶面心立方结构。时间分辨研究表明，在较短的诱导时间内，纳米棱镜是由原始银种子稳定消耗而形成的，长径比变化很小。
Silver nanoprisms with strong absorption in the near-IR have been synthesized using a modification of the photoinduced method by illuminating preformed silver seeds under different illumination conditions. Low-intensity light-emitting diodes and white light combined with different color filters are used as light sources. The lateral dimensions of the nanoprisms are found to be correlated in a quasilinear fashion with the emission wavelength and the position of the main in-plane dipole plasmon band. The structural characterization of the Ag nanoparticles, carried out using scanning electron microscopy., transmission electron microscopy (TEM), high-resolution TEM. and electron diffraction, reveal that the particles are flat and have a single-crystal face-centered-cubic structure. Time-resolved studies suggest that the nanoprisms are formed by steady consumption of the original Ag seeds with little variation of the aspect ratio after a short induction time.