Improved SERS activity of non-stoichiometric copper sulfide nanostructures related to charge-transfer resonance

doi:10.1039/c9cp05930j

HFCAS OpenIR

	Improved SERS activity of non-stoichiometric copper sulfide nanostructures related to charge-transfer resonance
	Chen, Menglei 1,2; Li, Ke 3,4; Luo, Yuanyuan3,4 ; Shi, Jianping 1,5; Weng, Chaocang 1; Gao, Lei 3; Duan, Guotao 2
	2020-03-07
发表期刊	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN	1463-9076
通讯作者	Luo, Yuanyuan(yyluo@issp.ac.cn) ; Shi, Jianping(jps51062@ahnu.edu.cn) ; Duan, Guotao(duangt@hust.edu.cn)
摘要	The low enhancement factor of semiconductor SERS substrates is a major obstacle for their practical application. Therefore, there is a need to explore the facile synthesis of new SERS substrates and reveal the SERS enhancement mechanism. Here, we develop a simple, facile and low-cost two-step method to synthesize copper sulfide based nanostructures with different Cu7.2S4 contents. The as-synthesized sample is composed of nanosheets with the CuS phase structure. With the increase of the annealing temperature to 300 degrees C, the CuS content gradually decreases and disappears, and the content of Cu7.2S4 and CuSO4 appears and gradually increases. At the annealing temperature of 350 degrees C, only CuSO4 exists. Compared with pure CuS or pure CuSO4, the detection limit of R6G molecules is the lowest for the composite sample with a higher content of Cu7.2S4, indicating that the introduction of non-stoichiometric Cu7.2S4 can improve the SERS performance and the higher content of Cu7.2S4 leads to a higher SERS activity. Furthermore, to investigate the SERS mechanism, the energy band structures and energy-level diagrams of different probe molecules over CuS, Cu7.2S4 and CuxS are studied by DFT calculations. Theoretical calculations indicate that the excellent SERS behavior depends on charge transfer resonance. Our work provides a general approach for the construction of excellent metal compound semiconductor SERS active substrates.
DOI	10.1039/c9cp05930j
关键词[WOS]	ENHANCED RAMAN-SCATTERING ; IN-SITU SYNTHESIS ; CUS ; NANOPARTICLES ; PERFORMANCE ; ELECTRODES ; CONVERSION ; NETWORKS
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2016YFC0201103] ; National Natural Science Foundation of China[11674320] ; National Natural Science Foundation of China[61775002] ; Key Research Projects of the Frontier Science CAS[QYZDB-SSW-JSC017] ; Open Fund of State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Chinese Academy of Sciences[KFS-2018] ; Open Fund of State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Chinese Academy of Sciences[KFS-2017] ; Institute of Optics and Electronics, Chinese Academy of Sciences[KFS-2018] ; Institute of Optics and Electronics, Chinese Academy of Sciences[KFS-2017]
项目资助者	National Key R&D Program of China ; National Natural Science Foundation of China ; Key Research Projects of the Frontier Science CAS ; Open Fund of State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Chinese Academy of Sciences ; Institute of Optics and Electronics, Chinese Academy of Sciences
WOS研究方向	Chemistry ; Physics
WOS类目	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:000519248900028
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/103562
专题	中国科学院合肥物质科学研究院
通讯作者	Luo, Yuanyuan; Shi, Jianping; Duan, Guotao
作者单位	1.Anhui Normal Univ, Coll Phys & Elect Technol, Wuhu 241000, Anhui, Peoples R China 2.Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Anhui Key lab Nanomat & Nanotechnol, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China 4.Univ Sci & Technol China, Hefei 230026, Peoples R China 5.Anhui Prov Key Lab Photoelect Mat Sci & Technol, Wuhu 241000, Peoples R China
推荐引用方式 GB/T 7714	Chen, Menglei,Li, Ke,Luo, Yuanyuan,et al. Improved SERS activity of non-stoichiometric copper sulfide nanostructures related to charge-transfer resonance[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2020,22.
APA	Chen, Menglei.,Li, Ke.,Luo, Yuanyuan.,Shi, Jianping.,Weng, Chaocang.,...&Duan, Guotao.(2020).Improved SERS activity of non-stoichiometric copper sulfide nanostructures related to charge-transfer resonance.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,22.
MLA	Chen, Menglei,et al."Improved SERS activity of non-stoichiometric copper sulfide nanostructures related to charge-transfer resonance".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 22(2020).