Fractal theory and controllable preparation of centimeter level silver nanowire arrays and their application in melamine detection as SERS substrates

Xu, Dapeng; Kang, Weigang; Zhang, Song; Yang, Wei; Jiang, Hengze; Lei, Yaping; Chen, Jian

doi:10.1016/j.saa.2019.117184

Cited by 10 publications

(2 citation statements)

References 47 publications

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“… 18 In addition, owing to the high SERS performance of Ag nanostructures, many meaningful results have been reported in the field of SERS-based biosensors. 19 − 22 At present, many types of Ag nanostructures have also been synthesized, such as nanorods, 23 NPs, 24 , 25 nanonets, 26 nanowires, 27 , 28 nanosheets, 29 etc. Especially, a Ag nanosheet nanostructure has a large surface area for easily adsorbing some biomolecules, which is considered as an ideal material for the SERS detection.…”

Section: Introductionmentioning

confidence: 99%

“…The surfaces of gold (Au), silver (Ag), or copper (Cu) nanostructures can exhibit an effective SERS signal. − Usually, Ag nanostructures have an excellent physical and chemical property in comparison with other precious metals, which have been widely studied and applied in the fields of optical sensors, biological diagnosis, catalysis, microelectronics, and so on . In addition, owing to the high SERS performance of Ag nanostructures, many meaningful results have been reported in the field of SERS-based biosensors. − At present, many types of Ag nanostructures have also been synthesized, such as nanorods, NPs, , nanonets, nanowires, , nanosheets, etc. Especially, a Ag nanosheet nanostructure has a large surface area for easily adsorbing some biomolecules, which is considered as an ideal material for the SERS detection.…”

Section: Introductionmentioning

confidence: 99%

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A Multilayer Interlaced Ag Nanosheet Film Prepared by an Electrodeposition Method on a PPy@PEDOT:PSS Film: A Strategy to Prepare Sensitive Surface-Enhanced Raman Scattering Substrates

Wang

Bai

et al. 2022

ACS Omega

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A highly sensitive multilayer interlaced silver (Ag) nanosheet (MISN) film was prepared on a PPy@PEDOT:PSS film via an electrodeposition method for surface-enhanced Raman scattering (SERS) applications. After the PPy@PEDOT:PSS film was pretreated with ascorbic acid solution, many sparse Ag nanoparticles (NPs) could be directly reduced on the surface of the PPy@PEDOT:PSS film in AgNO 3 solution. Then, the MISN film was directionally grown along the surface of sparse Ag NPs by using an electrochemical galvanostatic method to form a Ag/PPy@PEDOT:PSS film for a SERS substrate. The results indicated that with the increase in electrodeposition time, the density of Ag nanosheets was also increased for boosting the SERS effect. Accordingly, owing to the directional growth of Ag NPs, the increase in the length–width ratio of single Ag nanosheets would further promote the SERS signal of the substrate. Moreover, the maximum enhancement factor of the SERS substrate could reach to 12,478, and the minimum limit of detection of melamine solution was down to 5.42 ng/mL. The SERS sensitivity of the Ag nanosheet film reached 100.65. This method of preparing the SERS substrate provides a novel and robust strategy for the low-cost and high-sensitivity detection in biomedicine, drugs, and food.

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