title: A highly selective and sensitive on-off sensor for silver ions and cysteine by light scattering technique of DNA-functionalized gold nanoparticles.
abstract: DNA-functionalized gold nanoparticles are shown to act as a light-scattering switch. Ag(+) ion turns on the switch through the DNA-Au NPs conjugates based on the formation of cytosine-Ag(+)-cytosine base pairs, whereas cysteine turns off the light-scattering signal because it competitively binds to Ag(+).
authors.affiliation: Department of Chemistry, College of Life Science and Technology, Jinan University, Guangzhou 510632, China.
authors.forename: Da-Qian
authors.initials: DQ
authors.lastname: Feng
authors.forename: Guoliang
authors.initials: G
authors.lastname: Liu
authors.forename: Wenjie
authors.initials: W
authors.lastname: Zheng
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.forename: Tianfeng
authors.initials: T
authors.lastname: Chen
authors.forename: Dan
authors.initials: D
authors.lastname: Li
mesh_terms: D003545:Cysteine / Q000032:analysis*; D004247:DNA / Q000737:chemistry*; D015342:DNA Probes / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry*; D012542:Scattering, Radiation; D012834:Silver / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*
chemical_list: D015342:DNA Probes; D007477:Ions; D012834:Silver; D006046:Gold; D004247:DNA; D003545:Cysteine