Italian institute of Technology, Center for Biomolecular Nanotechnology (CBN), Via Barsanti 1, 73010 Arnesano, LE, Italy.
Nanoscale. 2011 May;3(5):2227-32. doi: 10.1039/c1nr10107b. Epub 2011 Apr 4.
A novel seed-mediated synthetic route to produce multibranched gold nanoparticles is reported, in which it is possible to precisely tune both their size and nanostructuration, while maintaining an accurate level of monodispersion. The nanoscale control of surface nanoroughness/branching, ranging from small bud-like features to elongated spikes, allows to obtain fine tuning of the nanoparticle optical properties, up to the red and near-IR region of the spectrum. Such anisotropic nanostructures were demonstrated to be excellent candidates for SERS applications, showing significantly higher signals with respect to the standard spherical nanoparticles.
本文报道了一种新颖的基于种子的合成方法，用于制备多分支金纳米粒子，通过该方法可以精确调控金纳米粒子的尺寸和纳米结构，同时保持良好的单分散性。通过控制纳米尺度的表面纳米粗糙/分支程度（从小的芽状特征到长的刺状结构），可以实现对纳米粒子光学性质的精细调控，甚至延伸到光谱的红色和近红外区域。这种各向异性的纳米结构被证明是 SERS 应用的优秀候选材料，与标准的球形纳米粒子相比，其信号显著增强。
