title: Arsenic(II) sulfide quantum dots prepared by a wet process from its bulk.
abstract: Arsenic(II) sulfide nanocrystals were fabricated by a wet process from its bulk through cluster-mediate transformation. The bulk arsenic(II) sulfide can be easily dissolved in ethylenediamine to form a solution-like cluster (As4S4-NH2C2H4NH2)). The cluster can be transformed to nanocrystals assisted by consumption of ethylenediamine in protic polar solvents with mild thermal treatment. The nanocrystals show size-dependent fluorescence ranging from UV to the blue, two photon fluorescence as well as cytotoxic effects on cancer cells.
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543.
authors.forename: Junzhong
authors.initials: J
authors.lastname: Wang
authors.forename: Ming
authors.initials: M
authors.lastname: Lin
authors.forename: Tianyu
authors.initials: T
authors.lastname: Zhang
authors.forename: Yongli
authors.initials: Y
authors.lastname: Yan
authors.forename: Paul C
authors.initials: PC
authors.lastname: Ho
authors.forename: Qing-Hua
authors.initials: QH
authors.lastname: Xu
authors.forename: Kian Ping
authors.initials: KP
authors.lastname: Loh
mesh_terms: D001152:Arsenicals / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D005029:Ethylenediamines / Q000737:chemistry; D005260:Female; D005347:Fibroblasts / Q000187:drug effects; D006367:HeLa Cells; D006801:Humans; D053758:Nanoparticles / Q000737:chemistry*; D010051:Ovarian Neoplasms / Q000188:drug therapy; D045663:Quantum Dots; D012996:Solutions; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013440:Sulfides / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D001152:Arsenicals; D005029:Ethylenediamines; D012996:Solutions; D013440:Sulfides; C045816:arsenic trisulfide; C031234:ethylenediamine