Surface-Enhanced Raman Scattering Studies on Aggregated Silver Nanoplates in Aqueous Solution

2006 ◽  
Vol 110 (43) ◽  
pp. 21545-21550 ◽  
Author(s):  
Xiangqin Zou ◽  
Shaojun Dong
Keyword(s):  
Aqueous Solution ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Silver Nanoplates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

In situ seed-growth synthesis of silver nanoplates on glass for the detection of food contaminants by surface enhanced Raman scattering

Talanta ◽  
2020 ◽  
Vol 216 ◽  
pp. 120936 ◽  
Author(s):  
Agnese D'Agostino ◽  
Andrea Mario Giovannozzi ◽  
Luisa Mandrile ◽  
Alessio Sacco ◽  
Andrea Mario Rossi ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Food Contaminants ◽  
Silver Nanoplates ◽  
Surface Enhanced ◽  
Seed Growth ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

scholarly journals Improved Surface-Enhanced-Raman Scattering Sensitivity Using Si Nanowires/Silver Nanostructures by a Single Step Metal-Assisted Chemical Etching

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1760
Author(s):  
Ioannis Kochylas ◽  
Spiros Gardelis ◽  
Vlassis Likodimos ◽  
Konstantinos Giannakopoulos ◽  
Polycarpos Falaras ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Raman Scattering ◽  
Chemical Etching ◽  
Surface Enhanced Raman Scattering ◽  
Single Step ◽  
Silver Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Metal Assisted Chemical Etching

In this study, we developed highly sensitive substrates for Surface-Enhanced-Raman-Scattering (SERS) spectroscopy, consisting of silicon nanowires (SiNWs) decorated by silver nanostructures using single-step Metal Assisted Chemical Etching (MACE). One-step MACE was performed on p-type Si substrates by immersion in AgNO3/HF aqueous solutions resulting in the formation of SiNWs decorated by either silver aggregates or dendrites. Specifically, dendrites were formed during SiNWs’ growth in the etchant solution, whereas aggregates were grown after the removal of the dendrites from the SiNWs in HNO3 aqueous solution and subsequent re-immersion of the specimens in a AgNO3/HF aqueous solution by adjusting the growth time to achieve the desired density of silver nanostructures. The dendrites had much larger height than the aggregates. R6G was used as analyte to test the SERS activity of the substrates prepared by the two fabrication processes. The silver aggregates showed a considerably lower limit of detection (LOD) for SERS down to a R6G concentration of 10−13 M, and much better uniformity in terms of detection in comparison with the silver dendritic structures. Enhancement factors in the range 105–1010 were calculated, demonstrating very high SERS sensitivities for analytic applications.

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