[J.Nanosci. Nanotech.] Facile Synthesis of Uniform Raspberry-like Gold Nanoparticles for High-performance Surface-Enhanced Raman Scattering
作者：Yun Rong, Lei Zhang, Zhenzhong Liu, Liwei Dai, Youju Huang*, Tao Chen*
關(guān)鍵字：Gold NPs, SERS
論文來源：期刊
具體來源：J.Nanosci. Nanotech., 2016, 16, 5683-5688
發(fā)表時(shí)間：2016年
Hierarchical Au nanostructures have attracted considerable attention owing to their rich hot-spots in inherent structures that have found various applications in surface-enhanced Raman scattering (SERS) based sensing and imaging. Herein we facilely synthesized uniform hierarchical raspberrylike Au nanostructures with tunable size via a seed-mediated growth approach employing a binary mixture of quaternized chitosan (QCS) and 5-bromosalicylic acid (5-BrSA). 5-BrSA plays an important role in tuning shapes and improving uniformity of resultant gold nanoparticles (AuNPs). The
obtained raspberry-like Au nanostructures have a spherical profile and randomly arranged protrusions on the outsides, and their size can be finely tuned in a range from 50 to 120 nm. The rough surfaces of the special raspberry-like Au nanostructures endow them higher SERS performance than spherical Au spheres with smooth surfaces, which is promising for the application of SERS based sensors and optical imaging.