Issue 37, 2020, Issue in Progress
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RSC Advances

SERS-active substrate assembled by Ag NW-embedded porous polystyrene fibers†

Shulin Chen,‡ab   Chen Ding,‡b   Yong Lin,b   Xinzhou Wu,b   Wei Yuan, ORCID logo *b   Xiuqing Meng,*a   Wenming Su ORCID logo b  and  Ke-Qin Zhang ORCID logo *c  

* Corresponding authors

a Zhejiang Provincial Key Laboratory of Solid State Optoelectronic Devices, Zhejiang Normal University, Jinhua 321004, China
E-mail: xqmeng@zjnu.cn

b Printable Electronics Research Centre, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, China
E-mail: wyuan2014@sinano.ac.cn

c National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China
E-mail: kqzhang@suda.edu.cn

Abstract

Here we demonstrate a novel SERS-active substrate assembled by silver nanowire (Ag NW)-embedded porous polystyrene (PS) fibers. Ag NWs are synthesized through a glycerol-mediated solvothermal method firstly, then electrospun into PS porous fibers. The as-synthesized Ag NWs are embedded in PS fiber and aligned orderly along the axial direction. Porous structure appears in PS fiber due to the phase separation induced by rapid evaporation of solvents. Large amounts of holes not only greatly improve the sample collection efficiency of the SERS-active substrate, but also significantly facilitate the adsorption of target molecules on the surface of Ag NWs, thus increasing the probability of enhancement of target molecules. In addition, compared with polyvinyl alcohol (PVA) and polyvinyl pyrrolidone (PVP), PS has better solvent resistance. The detection limit of 4-aminothiophenol (4-ATP) on our fabricated electrospun fiber mats is 10−7 M, and the electrospun fiber mats showed good reproducibility of SERS signal detection. This study proposes a feasible strategy for the large-scale preparation of flexible SERS-active substrate assembled by Ag NW-embedded porous PS fibers. The produced flexible SERS substrates may have potential application in wearable sensors for the trace detection of chemical and biological molecules.

Graphical abstract: SERS-active substrate assembled by Ag NW-embedded porous polystyrene fibers

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Article information

DOI
https://doi.org/10.1039/D0RA01454K
Article type
Paper
Submitted
15 Feb 2020
Accepted
20 May 2020
First published
08 Jun 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 21845-21851

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SERS-active substrate assembled by Ag NW-embedded porous polystyrene fibers

S. Chen, C. Ding, Y. Lin, X. Wu, W. Yuan, X. Meng, W. Su and K. Zhang, RSC Adv., 2020, 10, 21845 DOI: 10.1039/D0RA01454K

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