Tailoring the sp2/sp3 carbon composition for surface enhancement in Raman scattering
Li, Haining1,2; Yang, Bing1; Lu, Jiaqi1,2; Guo, Xiaokun1,2; Yu, Biao1,2; Xiong, Ying3; Huang, Nan1; Liu, Lusheng1; Xu, Ge4; Jiang, Xin1
Corresponding AuthorYang, Bing( ; Xu, Ge( ; Jiang, Xin(
AbstractCarbon materials exhibit great potential in the application of surface-enhanced Raman scattering (SERS). In this work, the approaches of tailoring the sp2/sp3 carbon using chemical vapor deposition (CVD) and chemical terminations using surface modification were carried out in order to improve the SERS properties of carbon materials. With increasing the methane gas flow in CVD process, amorphous sp2 carbon was added into nanocrystalline diamond films. At high methane concentration, diamond/graphite (D/G) nanosheet films with a porous structure were formed with diamond nanosheet as a core and multilayer graphite as a shell. The adsorbed R6G molecules exhibit an increase in Raman signals with increasing the methane concentration. With oxidizing the D/G samples by modified Hummers method, the Raman signals are further increased with a detection limit of 10-8 mol/L and an enhancement factor of about 7 x 106. The Raman and XPS results indicate that such Raman enhancement is attributed to the C--O groups formed on the conductive graphite, the 7C-7C stacking interaction between the probe molecule and the graphite and the presence of the porous structure. The oxidized D/G films exhibit high mechanical strength and recyclability after repeated detection-cleaning process, which are urgently needed for practical SERS application.
Keywordsurface-enhanced Raman scattering Nanocrystalline diamond film Chemical vapor deposition Surface modifications
Funding OrganizationNational Natural Science Foundation of China
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[52172056] ; National Natural Science Foundation of China[51872294]
WOS Research AreaChemistry ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000817796000004
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Document Type期刊论文
Corresponding AuthorYang, Bing; Xu, Ge; Jiang, Xin
Affiliation1.Chinese Acad Sci, Inst Met Res IMR, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Dept Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
3.Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Peoples R China
4.Shenyang Univ Technol, Sch Environm & Chem Engn, 111 Shenliao West Rd, Shenyang 110870, Peoples R China
Recommended Citation
GB/T 7714
Li, Haining,Yang, Bing,Lu, Jiaqi,et al. Tailoring the sp2/sp3 carbon composition for surface enhancement in Raman scattering[J]. APPLIED SURFACE SCIENCE,2022,599:9.
APA Li, Haining.,Yang, Bing.,Lu, Jiaqi.,Guo, Xiaokun.,Yu, Biao.,...&Jiang, Xin.(2022).Tailoring the sp2/sp3 carbon composition for surface enhancement in Raman scattering.APPLIED SURFACE SCIENCE,599,9.
MLA Li, Haining,et al."Tailoring the sp2/sp3 carbon composition for surface enhancement in Raman scattering".APPLIED SURFACE SCIENCE 599(2022):9.
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