Surface-enhanced Raman spectroscopy of dye molecules on Ag-modified silicon nanowire substrates: influence of photoinduced probe degradation on enhancement factors

2017 ◽  
Vol 48 (9) ◽  
pp. 1171-1181 ◽  
Author(s):  
L. Mehrvar ◽  
M. Sadeghipari ◽  
S. H. Tavassoli ◽  
S. Mohajerzadeh
Keyword(s):  
Raman Spectroscopy ◽  
Silicon Nanowire ◽  
Surface Enhanced Raman Spectroscopy ◽  
Dye Molecules ◽  
Surface Enhanced ◽  
Enhancement Factors ◽  
Surface Enhanced Raman

scholarly journals Highly Sensitive Surface Enhanced Raman Spectroscopy from Ag Nanoparticles Decorated Graphene Sheet

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Hui Song ◽  
Xin Li ◽  
Sweejiang Yoo ◽  
Yuan Wu ◽  
Weihua Liu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Size Distribution ◽  
Ag Nanoparticles ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrate ◽  
Ag Nps ◽  
Sers Enhancement ◽  
Surface Enhanced ◽  
Enhancement Factors ◽  
Surface Enhanced Raman

Surface enhanced Raman spectroscopy (SERS) is a powerful analytical technique and has been most intensively studied. In this work, electroless deposition is proposed for Ag nanoparticles (NPs) decorated on chemical vapor deposition (CVD) growth graphene sheets (GS) to create hybrid SERS substrate. From three aspects of size distribution, morphology, and coverage, Ag NPs controllable decoration on GS and SERS enhancement factors of the hybrid SERS substrate is investigated. 200–300 times enhanced SERS intensities are detected from the Ag NPs on GS hybrid as compared to pure GS. Controllable decoration is crucial for improving SERS enhancement factorsβEF, becauseβEFfrom quasi cubic Ag NPs on GS is 6.53 times stronger than that from spheric one; 1.6 timesβEFis detected while the Ag NPs size distribution is reduced to half, and when the coverage is doubled,βEFis nearly doubled. This controllable Ag NPs/GS hybrid is capable of serving as a high performance SERS substrate for efficient chemical and biological sensing applications.

scholarly journals Active site-dominated electromagnetic enhancement of surface-enhanced Raman spectroscopy (SERS) on a Cu triangle plate

RSC Advances ◽  
2020 ◽  
Vol 10 (69) ◽  
pp. 42030-42037
Author(s):  
Chang Li ◽  
Mingqiang Chen
Keyword(s):  
Raman Spectroscopy ◽  
Rough Surface ◽  
Active Site ◽  
Chemical Etching ◽  
Surface Enhanced Raman Spectroscopy ◽  
Electromagnetic Enhancement ◽  
Surface Enhanced ◽  
Enhancement Factors ◽  
Surface Enhanced Raman

Chemical etching CTP to create a rough surface that has high enhancement factors of SERS.

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