Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (3): 736.doi: 10.7503/cjcu20200453

• Analytical Chemistry • Previous Articles     Next Articles

Controllable Assembling of Silver Nanosheets on Non-woven Fabric Fibers and Its SERS Effect

LI Qi1, TIAN Du1, CHEN Shaoyun1, ZHONG Min1, HU Chenglong1(), CHEN Jian2   

  1. 1.Key Laboratory of Optoelectronic Chemical Materials and Devices,Ministry of Education,School of Chemical and Environmental Engineering,Jianghan University,Wuhan 430056,China
    2.Instrumental Analysis and Research Center,Sun Yat?sen University,Guangzhou 510275,China
  • Received:2020-07-14 Online:2021-03-10 Published:2020-09-05
  • Contact: HU Chenglong E-mail:ceshcl@jhun.edu.cn
  • Supported by:
    ? Supported by the Program of the Wuhan Municipal Science and Technology Bureau, China(2019010701011384);the National Natural Science Foundation of China(51973244)

Abstract:

A two-step chemical synthesis method was used to in situ construct Ag nanosheets(AgNS) with a nanogap of 20—110 nm on the non-woven fabrics fiber(NWF)(marked with AgNS@NWF). Scanning electron microscopy showed that the AgNS@NWF micro-nano structure had a hierarchical structure, and it was used for the study of surface-enhanced Raman scattering(SERS). The experimental results showed that the as- prepared AgNS@NWF micro-nano structure had a good SERS sensitivity and excellent signal reproducibility. Rhodamine 6G(R6G) was used as the probe molecule for SERS detection, and the logarithmic plot of SERS intensity versus loading concentration of R6G played a small slope of 0.32±0.03, indicating that the AgNS@NWF micro-nano structure offers sufficient binding sites for the efficient capture of the analyte from the loading solution, even at a low concentration of 1×10-10 mol/L, the Raman peaks of R6G at band of 610, 773, 1361 and 1648 cm-1 could still be clearly observed. The relative standard deviations of the Raman scattering intensities at band of 610 cm-1 were 3.57%, 3.67% and 8.46%, respectively, when the concentration of R6G was reduced by an order of magnitude in the range of 1×10?5―1×10?7 mol/L, which was better than or close to previous studies. The AgNS@NWF micro-nano structure was used to detect low-activity 3-mercaptopropionic acid and melamine molecules, and the minimum detection limits were 1×10?5 mol/L and 1×10-6 mol/L, respectively. This method offered an easy, rapid, and low-cost way to prepare highly sensitive and reproducible SERS substrates and made the SERS more practicable.

Key words: Surface-enhanced Raman scattering, Non-woven fabric, Silver nanosheets, Nanogap, Rhodamine 6G

CLC Number: 

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