title: Specific detection of cysteine and homocysteine: recognizing one-methylene difference using fluorosurfactant-capped gold nanoparticles.
abstract: Aggregation of fluorosurfactant-capped gold nanoparticles could be induced selectively by cysteine and homocysteine and, when solution ionic strength was low, the kinetics of homocysteine-induced aggregation of large size nanoparticles (approximately 40 nm) was much faster than that induced by cysteine, leading to specific detection of homocysteine in the presence of excess cysteine.
authors.affiliation: Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Lu
authors.forename: Yanbing
authors.initials: Y
authors.lastname: Zu
mesh_terms: D003545:Cysteine / Q000032:analysis / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D006710:Homocysteine / Q000032:analysis / Q000737:chemistry*; D006860:Hydrogen Bonding; D007700:Kinetics; D053758:Nanoparticles / Q000737:chemistry*; D009994:Osmolar Concentration; D012965:Sodium Chloride / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry*; D013997:Time Factors
chemical_list: D012996:Solutions; D013501:Surface-Active Agents; D006710:Homocysteine; D012965:Sodium Chloride; D006046:Gold; D003545:Cysteine