title: Visual and trap emission spectrometric detections of Ag (I) ion with mesoporous ZnO/CdS@SiO2 core/shell nanocomposites.
abstract: A new method for the preparation of mesoporous ZnO/CdS@SiO(2) core/shell nanostructure (CSN) has been developed. The mesoporous silica shells allow Ag(+) to enter into the interior of the nanostructures to contact with ZnO/CdS core, accordingly causes the quenching of its band edge emission (475 nm) along with a simultaneous enhancement of red emission at around 595 nm. So, a novel visual fluorescence detection strategy for Ag(+) ion is proposed based on a common core/shell Quantum dots nanostructure. Under optimal conditions, the enhanced fluorescence intensity at 595 nm increased linearly with the concentration of Ag(+) ion ranging from 0.03 μM to 0.24 μM with a detection limit (3σ) of 3.3 nM.
authors.affiliation: College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China.
authors.forename: Chuanxiao
authors.initials: C
authors.lastname: Yang
authors.forename: Xiangying
authors.initials: X
authors.lastname: Sun
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D007477:Ions / Q000032:analysis; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry*; D045663:Quantum Dots; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry; D012834:Silver / Q000032:analysis* / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013440:Sulfides / Q000737:chemistry; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D007477:Ions; D013440:Sulfides; C034939:cadmium sulfide; D012834:Silver; D012822:Silicon Dioxide; D015034:Zinc Oxide