Using Good’s Buffers To Control the Anisotropic Structure and Optical Properties of Spiky Gold Nanoparticles for Refractive Index Sensing
Using Good’s Buffers To Control the Anisotropic Structure and Optical Properties of Spiky Gold Nanoparticles for Refractive Index Sensing
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DOI：
10.1021/acsanm.9b01117
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发表时间：
2019-07
影响因子：
5.9
通讯作者：
Roger M. Pallares;Terrence Stilson;Priscilla Choo;Jingtian Hu;Teri W. Odom
中科院分区：
文献类型：
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作者：
Roger M. Pallares;Terrence Stilson;Priscilla Choo;Jingtian Hu;Teri W. Odom
尖刺状金纳米粒子显示出结构可调的光学性质。然而，大多数合成过程不能独立地操纵整体颗粒形状、核尺寸和尖峰特征。此外，常规方案依赖于限制应用的细胞毒性和/或强结合的表面活性剂。本文报道了一组参数，通过使用不同的生物相容性良好的缓冲液，通过种子介导的合成生长的尖刺状的金纳米粒子的各向异性特征进行操纵。即使使用大种子（高达100 nm），也能保持尖峰尺寸。最后，我们通过调节尖峰的长度和宽度，获得了对周围环境折射率变化具有高灵敏度的粒子。
Spiky gold nanoparticles show structure-tunable optical properties. Most synthetic procedures, however, cannot independently manipulate the overall particle shape, core size, and spike features. Furthermore, conventional protocols rely on cytotoxic and/or strongly bound surfactants that limit applications. This paper reports a set of parameters to manipulate the anisotropic features of spiky gold nanoparticles grown by using different biocompatible Good’s buffers through a seed-mediated synthesis. Spike dimensions were preserved even when large seeds (up to 100 nm) were used. Finally, we obtained particles with high sensitivity to changes in the refractive index of the surroundings by tuning the spike length and width.