Abstract

Surface-enhanced Raman scattering (SERS) of a single ZnO nanorod (NR) is demonstrated by coating with Ag nanoparticles (NPs). An enhancement factor of $1.2\times {10}^3$ and $4.4\times {10}^2$ has been obtained for $E_2$ (high) mode ($437{\mathrm{cm}}^{-1}$) and $A_1$ (TO) mode ($378{\mathrm{cm}}^{-1}$), respectively. Electron paramagnetic resonance measurements reveal an unintentional donor state in ZnO NRs. The enhancement of deep-level emission and micro-absorption mapping of a single ZnO NR further confirms the presence of the donor state. The SERS is believed to result from the charge transfer between ZnO NRs and Ag NPs, which can be enhanced by the empty donor state in ZnO. Finally, single ZnO NRs coated with Ag can be used as good SERS substrates for small molecule detection. This Letter highlights the interaction between point defects and the SERS effect down to a single semiconductor NR.

© 2018 Optical Society of America

Raman scattering enhancement of a single ZnO nanorod decorated with Ag nanoparticles: synergies of defects and plasmons: publisher’s note

Ruibin Lin, Liang Hu, Jinzhang Wang, Wenjing Zhang, Shuangchen Ruan, and Yu-Jia Zeng
Opt. Lett. 43(11) 2627-2627 (2018)

Si/ZnO nanocomb arrays decorated with Ag nanoparticles for highly efficient surface-enhanced Raman scattering

Hong Jun Yin, Yu Fei Chan, Zheng Long Wu, and Hai Jun Xu
Opt. Lett. 39(14) 4184-4187 (2014)

Self-assembled monolayers of bimetallic Au/Ag nanospheres with superior surface-enhanced Raman scattering activity for ultra-sensitive triphenylmethane dyes detection

Yue Tian, Hua Zhang, Linlin Xu, Ming Chen, and Feng Chen
Opt. Lett. 43(4) 635-638 (2018)

ZnO/graphene/Ag composite as recyclable surface-enhanced Raman scattering substrates

Jie Zhang, Xiaolei Zhang, Yimin Ding, and Yong Zhu
Appl. Opt. 55(32) 9105-9112 (2016)

Surface-enhanced Raman scattering of monolayer transition metal dichalcogenides on Ag nanorod arrays

Liqin Su, Layne Bradley, Yiling Yu, Yifei Yu, Linyou Cao, Yiping Zhao, and Yong Zhang
Opt. Lett. 44(22) 5493-5496 (2019)