title: Type I collagen-templated assembly of silver nanoparticles and their application in surface-enhanced Raman scattering.
abstract: Silver nanoparticles (Ag NPs) are one of the active substrates that are employed extensively in surface-enhanced Raman scattering (SERS), and aggregations of Ag NPs play an important role in enhancing the Raman signals. In this paper, we fabricated two kinds of SERS-active substrates utilizing the electrostatic adsorption and superior assembly properties of type I collagen. These were collagen-Ag NP aggregation films and nanoporous Ag films. Two probe molecules, 4-aminothiophenol (4-ATP) and methylene blue (MB), were studied on these substrates. These substrates showed reproducible SERS intensities with relative standard deviations (RSDs) of 8-10% and 11-14%, respectively, while the RSDs of the traditional thick Ag films were 12-28%. Also, the intensities for the 4-ATP spectrum on the collagen-templated nanoporous Ag film were approximately one order higher than those on the DNA-templated Ag film.
authors: State Key Lab of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, People's Republic of China.
authors: Yujing
authors: Y
authors: Sun
authors: Gang
authors: G
authors: Wei
authors: Yonghai
authors: Y
authors: Song
authors: Li
authors: L
authors: Wang
authors: Lanlan
authors: L
authors: Sun
authors: Cunlan
authors: C
authors: Guo
authors: Tao
authors: T
authors: Yang
authors: Zhuang
authors: Z
authors: Li