title: [Preparation, characterization and surface-enhanced Raman properties of agarose gel/gold nanoparticles hybrid].
abstract: Agarose gel/gold nanoparticles hybrid was prepared by adding gold nanoparticles to preformed agarose gel. Naniocomposite structures and properties were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and UV-Vis-NIR absorption spectroscopy. Experimental data indicated a uniform distribution of gold nanoparticles adsorbed on agarose gel network And the excellent optical absorption properties were shown. Based on the swelling-contraction characteristics of agarose gel and the adjustable localized surface plasmon resonance (LSPR) of the gold nanoparticles, the nano-composites were used as surface enhanced Raman scattering (SERS) substrate to detect the Raman signal molecules Nile blue A. Results revealed that the porous structure of the agarose gel provided a good carrier for the enrichment of the gold nanoparticles. The gold nanoparticles dynamic hot-spot effect arising from the agarose gel contraction loss of water in the air greatly enhanced the Raman signal.
authors.forename: Xiao-yuan
authors.initials: XY
authors.lastname: Ma
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.forename: Zhou-ping
authors.initials: ZP
authors.lastname: Wang
mesh_terms: D006046:Gold; D053768:Metal Nanoparticles; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D012685:Sepharose; D019265:Spectroscopy, Near-Infrared; D013059:Spectrum Analysis, Raman; D020349:Surface Plasmon Resonance; D013499:Surface Properties
chemical_list: D006046:Gold; D012685:Sepharose