title: Carbon nanotube/gold nanoparticle composite-coated membrane as a facile plasmon-enhanced interface for sensitive SERS sensing.
abstract: The facile assembly of three-dimensional (3D) plasmonic substrates has been demonstrated. The assembly is based on the homogeneous decoration of multi-walled carbon nanotube/gold nanoparticle (CNT/AuNP) hybrid nanocomposites on a commercial polyvinylidene difluoride (PVDF) membrane, which is achieved via simple filtration. The CNT/AuNP hybrids with a unique 1D/0D structure remarkably improve the coverage and uniformity of plasmonic nanostructures on the membrane. The effective inter-particle and inter-tube coupling creates a multitude of hot spots within the probe area, and can produce a strong SERS effect. Moreover, the flexible membrane-based scaffold can efficiently collect and concentrate trace targets from large-volume sample solutions at milliliter-scale. The membrane-based SERS sensor shows high sensitivity and good reproducibility. The SERS sensor is employed to detect various molecular contaminants in aqueous samples, demonstrating its excellent field-testing capabilities for applications ranging from food safety to environmental monitoring.
authors.affiliation: Department of Chemistry, State Key Lab of Molecular Engineering of Polymers and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, China. bhliu@fudan.edu.cn.
authors.forename: Kun
authors.initials: K
authors.lastname: Zhang
authors.forename: Ji
authors.initials: J
authors.lastname: Ji
authors.forename: Xiaoni
authors.initials: X
authors.lastname: Fang
authors.forename: Ling
authors.initials: L
authors.lastname: Yan
authors.forename: Baohong
authors.initials: B
authors.lastname: Liu
mesh_terms: D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry; D013059:Spectrum Analysis, Raman; D013499:Surface Properties; D005465:Fluorocarbon Polymers
chemical_list: D020099:Coated Materials, Biocompatible; D006046:Gold; D037742:Nanotubes, Carbon; D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers