title: Luminescent CuS nanotubes as silver ion probes.
abstract: CuS nanotubes (NTs) made up of nanoparticles were successfully prepared in large quantities in an O/W microemulsion system under low temperature. Based on the characteristics of synchronous fluorescence spectroscopy (SFS), a new method with high sensitivity and selectivity was developed for rapid determination of silver ion with functional copper sulphide (CuS) nanotubes as a fluorescence probe. Under optimal conditions, functional copper sulphide displayed a calibration response for silver ion over a wide concentration range from 1.0x10(-10) to 1.0x10(-8)molL(-1). The limit of detection was 0.5x10(-10)molL(-1) and the relative standard deviation of eight replicate measurements for the highest concentration (1x10(-8)molL(-1)) was 3%. Compared with several fluorescence methods, the proposed method had a wider linear range and improved the sensitivity. Furthermore, the concentration dependence of the synchronous fluorescence intensity is effectively described by a Langmuir-type binding isotherm.
authors.affiliation: College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China. zhangxiaojun173@yahoo.com.cn
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Zhang
authors.forename: Guangfeng
authors.initials: G
authors.lastname: Wang
mesh_terms: D003300:Copper / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013438:Sulfhydryl Compounds / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D005456:Fluorescent Dyes; D013438:Sulfhydryl Compounds; D012834:Silver; D003300:Copper; C017846:cupric sulfide