title: Development of a novel deltamethrin sensor based on molecularly imprinted silica nanospheres embedded CdTe quantum dots.
abstract: A novel procedure for the determination of deltmethrin (DM) is reported. The water-soluble CdTe quantum dots (QDs) and highly fluorescent silica molecularly imprinted nanospheres embedded CdTe QDs (CdTe-SiO2-MIPs) were prepared and characterized by fluorescence spectroscopy, UV-vis spectroscopy, TEM and IR. The fluorescence nanosensor based CdTe-SiO2-MIPs is developed. The possible quenching mechanism is discussed by DM. Under optimal conditions, the relative fluorescence intensity of CdTe-SiO2-MIPs decreased with increasing DM by a Stern-Volmer type equation in the concentration range of 0.5-35.0 μg mL(-1), the corresponding detection limit is 0.16 μg mL(-1). The developed sensor based on CdTe-SiO2-MIPs was applied to determine DM in fruit and vegetable samples.
authors.affiliation: Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, China.
authors.forename: Shenguang
authors.initials: S
authors.lastname: Ge
authors.forename: Juanjuan
authors.initials: J
authors.lastname: Lu
authors.forename: Lei
authors.initials: L
authors.lastname: Ge
authors.forename: Mei
authors.initials: M
authors.lastname: Yan
authors.forename: Jinghua
authors.initials: J
authors.lastname: Yu
mesh_terms: D015374:Biosensing Techniques; D019187:Cadmium Compounds / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry; D057230:Limit of Detection; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D054802:Molecular Imprinting; D054118:Nanospheres / Q000737:chemistry* / Q000648:ultrastructure; D009570:Nitriles / Q000032:analysis* / Q000737:chemistry*; D011722:Pyrethrins / Q000032:analysis* / Q000737:chemistry*; D045663:Quantum Dots; D012822:Silicon Dioxide / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013691:Tellurium / Q000737:chemistry*; D014675:Vegetables / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D009570:Nitriles; D011722:Pyrethrins; C017180:decamethrin; D012822:Silicon Dioxide; D013691:Tellurium; C028337:cadmium telluride