Improvement in surface-enhanced Raman spectroscopy from cubic SiC semiconductor nanowhiskers by adjustment of energy levels. Issue 39 (26th September 2016)

• Record Type: Journal Article
• Authors: Liu, Wenna; Yang, Tao; Chen, Junhong; Chen, Yingzhi; Hou, Xinmei; Han, Xuemei; Chou, Kuo-Chih
• Is Part Of: Physical chemistry chemical physics. Volume 18:Issue 39(2016)
• Page Start: 27572
• Page End: 27576
• Publication Date: 2016-09-26
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c6cp05346g
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : A highly enhanced, reproducible Raman signal of the 4-MBA molecule was observed on the surface of SiCNWs. Improved SERS enhancement was also achieved in these nanowhiskers by adjusting the energy levels. Abstract : Enhanced reproducible Raman signals of the 4-MBA molecule were observed on the surface of semiconducting SiC nanowhiskers (SiCNWs) by surface-enhanced Raman spectroscopy (SERS). The SERS enhancement was further tuned and boosted by doping with B. Theoretical calculations were performed to unravel the mechanism of the SERS enhancement and it was found that the SERS effect was strongly associated with the energy level structure between the substrate and analyte. Appropriate energy level matching facilitated the charge transfer process during laser illumination, enhancing the SERS signal. This proposed mechanism was verified through multiple control experiments.