Nonresonant Surface-Enhanced Raman Scattering of ZnO Quantum Dots with Au and Ag Nanoparticles

Anna Rumyantseva (1) , Serguei Kochtcheev (1) , Pierre-Michel Adam (1) , Sergey Gaponenko (2) , Svetlana Vaschenko (2) , Olga Kulakovich (2) , Andrey Ramanenka (3) , Dmitry Guzatov (4) , Dmytro Korbutyak (5) , Volodymyr Dzhagan (5) , Alexander Stroyuk (5) , Vitaliy Shvalagin (5)

1 LNIO - Laboratoire de Nanotechnologie et d'Instrumentation Optique
2 NASB - National Academy of Sciences of Belarus
3 Belarussian State University
4 Yanka Kupala State University of Grodno
5 NASU - National Academy of Sciences of Ukraine

Pronounced 104-fold enhancement of Raman scattering has been obtained for ZnO nanocrystals on substrates coated with 50 nm Ag nanoparticles under nonresonant excitation with a commercial red-emitting laser. This makes feasible beyond 10–18 mole detection of ZnO nanocrystals with a commercial setup using a 0.1 mW continuous wave laser and can be purposefully used in analytical applications where conjugated nanocrystals serve as Raman markers. For Au-coated surfaces the enhancement is much lower and the heating effects in the course of Raman experiments are pronounced.

Keywords: plasmonic enhancement; ZnO nanocrystals; SERS

Domains: Engineering Sciences [physics]; Optics / Photonic

Anna Rumyantseva, Serguei Kochtcheev, Pierre-Michel Adam, Sergey Gaponenko, Svetlana Vaschenko, et al.. Nonresonant Surface-Enhanced Raman Scattering of ZnO Quantum Dots with Au and Ag Nanoparticles. ACS Nano, 2013, 7 (4), pp.3420-3426. ⟨10.1021/nn400307a⟩. ⟨hal-02369626⟩