[Preparation and characterization of morin-modified self-assembled multilayer films of gold nanoparticles].
Quartz substrate was modified with self-assembled monolayer of gamma-aminopropyl-triethylsilane by aqueous phase silanization, giving an homogenous surface terminated with amino groups. Colloidal gold nanoparticles were further assembled on this functionalized monolayer substrate, forming a gold nanoparticles/APES/quartz nanocomposite structure. Flourescent reagent morin was assembled onto the self-assembled multilayer films of gold nanoparticles via DL-cystenine (Cys) intermediate. The morin-modified self-assembled multilayer films of gold nanoparticles could detect triphenyltin fluorimetrically with high sensitivity, and the detection limit was as low as 1.297 x 10(-8) mol x L(-1). The effects of various factors such as concentration of solution, pH, and assembling time were investigated. The response mechanism behind caused the enhancement of relative fluorescence intensity was also discussed.
He
Fei
F
College of Materials Science and Engineering, Huaqiao University, Quanzhou 362021, China.
Sun
Xiang-ying
XY
Liu
Bin
B