Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 29, Pages 35038-35045Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c05804
Keywords
SERS; Ga-doped ZnO; SPR; semiconductor; electromagnetic
Funding
- National Natural Science Foundation of P. R. China [21773080, 21711540292]
- Development Program of the Science and Technology of Jilin Province [20190701003GH]
- Department of Science and Technology of Jilin Province [20190201215jc, 20200404193YY]
- Jilin Province Development and Reform Commission [2019c049-6]
Ask authors/readers for more resources
This study investigated the use of Ga-doped ZnO nanoparticles as novel SERS substrates based on the electromagnetic enhancement contribution of surface plasmon resonance (SPR). It was found that Ga-doped ZnO NPs with the highest free charge carrier density and a doping ratio of 5% exhibited the strongest SERS spectra. The study showed the feasibility of electromagnetic contributions to SERS using semiconductive substrates and could contribute to the development of the semiconductor-based EM mechanism.
In recent years, semiconductor-based surface-enhanced Raman scattering (SERS) substrates have received considerable attention and led to a forefront in the SERS field. However, the lack of electromagnetic (EM) enhancement contributions highly precludes the development of semiconductive-substrate-based SERS. In this study, Ga-doped ZnO nanoparticles (NPs) were fabricated and employed as novel SERS substrates based on the EM enhancement contribution of surface plasmon resonance (SPR). The obtained Ga-doped ZnO NPs exhibited obvious SPR absorptions in the visible and near- and mid-infrared regions. SPR absorption can be readily tuned by changing the doping ratios of Ga3+ ions. The SERS spectra of Ga-doped ZnO/4-mercaptopyridine (MPy) were investigated at different excitation wavelengths of 488, 532, 633, and 785 nm. The spectral enhancement of Ga-doped ZnO substrates depended on the doping ratios, excitation wavelengths, and nearby SPR absorption. Ga-doped ZnO NPs with the highest free charge carrier density and the doping ratio of 5% showed the strongest SERS spectra. For the fixed doping ratio of 5%, the better is the match between excitation wavelengths and SPR absorption, the higher is the SERS spectral enhancement. This study showed the feasibility of EM contributions to SERS by using semiconductive substrates and can contribute to the development of the semiconductor-based EM mechanism.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available