Electrospun Nanofibers Made of Silver Nanoparticles, Cellulose Nanocrystals, and Polyacrylonitrile as Substrates for Surface-Enhanced Raman Scattering

Materials

Franz Ehrenhauser¹  Suxia Ren²  Tingzhou Lei²  Lili Dong²  Xiuqiang Zhang²  Kunlin Song³  Xiuxuan Sun³  Meichun Li³  Qinglin Wu³ 

[1] Audubon Sugar Institute, Louisiana State University Ag Center, St. Gabriel, LA 70776, USA;Key Biomass Energy Laboratory of Henan Province, Zhengzhou 450008, Henan, China;School of Renewable Natural Resources, Louisiana State University Ag Center, Baton Rouge, LA 70803, USA;

关键词: surface-enhanced Raman scattering;    electrospinning;    cellulose nanocrystal;    polyacrylonitrile;    silver nanoparticles;   

DOI  :  10.3390/ma10010068

来源: DOAJ

【 摘 要 】

Nanofibers with excellent activities in surface-enhanced Raman scattering (SERS) were developed through electrospinning precursor suspensions consisting of polyacrylonitrile (PAN), silver nanoparticles (AgNPs), silicon nanoparticles (SiNPs), and cellulose nanocrystals (CNCs). Rheology of the precursor suspensions, and morphology, thermal properties, chemical structures, and SERS sensitivity of the nanofibers were investigated. The electrospun nanofibers showed uniform diameters with a smooth surface. Hydrofluoric (HF) acid treatment of the PAN/CNC/Ag composite nanofibers (defined as p-PAN/CNC/Ag) led to rougher fiber surfaces with certain pores and increased mean fiber diameters. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results confirmed the existence of AgNPs that were formed during heat and HF acid treatment processes. In addition, thermal stability of the electrospun nanofibers increased due to the incorporation of CNCs and AgNPs. The p-PAN/CNC/Ag nanofibers were used as a SERS substrate to detect p-aminothiophenol (p-ATP) probe molecule. The results show that this substrate exhibited high sensitivity for the p-ATP probe detection.

【 授权许可】

Unknown