title: Facile fabrication of a silver dendrite-integrated chip for surface-enhanced Raman scattering.
abstract: A facile approach to fabricating a surface-enhanced Raman scattering (SERS)-active chip by integrating silver dendrites with copper substrate through a one-step process was explored. The structures of dendrites were synthesized and controlled by an AgNO3/PVP aqueous system, and the fabrication parameters amount of AgNO3/PVP and reaction time were systematically investigated. The optimized silver dendrites, closely aggregated on the surface of the copper chip, exhibited high SERS activity for detecting rhodamine 6G at a concentration as low as 3.2 × 10(-11) M. Meanwhile, the prepared SERS-active chip displayed a high thermal stability and good reproducibility. Moreover, the potential application for analysis of polycyclic aromatic hydrocarbons was demonstrated by detection of fluoranthene at a low concentration of 4.5 × 10(-10) M. This SERS-active chip prepared by the convenient and high-yield method would be a promising means for rapid detection under field conditions.
authors.affiliation: Key Laboratory for Advanced Materials and Department of Chemistry, East China University of Science and Technology , Shanghai 200237, P. R. China.
authors.forename: Hai-Xin
authors.initials: HX
authors.lastname: Gu
authors.forename: Lin
authors.initials: L
authors.lastname: Xue
authors.forename: Yong-Feng
authors.initials: YF
authors.lastname: Zhang
authors.forename: Da-Wei
authors.initials: DW
authors.lastname: Li
authors.forename: Yi-Tao
authors.initials: YT
authors.lastname: Long
keywords: SERS; copper substrate; detection chip; silver dendrites