Journal
NANOSCALE RESEARCH LETTERS
Volume 11, Issue -, Pages -Publisher
SPRINGER
DOI: 10.1186/s11671-016-1442-5
Keywords
Non-aqueous silver sols; N,N-Dimethylformamide; Surface-enhanced Raman spectroscopy; Thin-layer chromatography
Funding
- School of Medicine, Shanghai Jiao Tong University [14XJ10067]
- foundation of Shanghai Third People's Hospital, School of Medicine, Shanghai Jiao Tong University [syz2013-002]
- Ministry of Science and Technology of the People's Republic of China [2012YQ180132]
- Science & Technology Commission of Shanghai Municipality [15142201300]
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Thin-layer chromatography (TLC) coupled with surface-enhanced Raman spectroscopy (SERS) has gained tremendous popularity in the study of various complex systems. However, the detection of hydrophobic analytes is difficult, and the specificity still needs to be improved. In this study, a SERS-active non-aqueous silver sol which could activate the analytes to produce rich and stable spectral features was rapidly synthesized. Then, the optimized silver nanoparticles (AgNPs)-DMF sol was employed for TLC-SERS detection of hydrophobic (and also hydrophilic) analytes. SERS performance of this sol was superior to that of traditional Lee-Meisel AgNPs due to its high specificity, acceptable stability, and wide applicability. The non-aqueous AgNPs would be suitable for the TLC-SERS method, which shows great promise for applications in food safety assurance, environmental monitoring, medical diagnoses, and many other fields.
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