title: A sensitive and label-free photoelectrochemical aptasensor using Co-doped ZnO diluted magnetic semiconductor nanoparticles.
abstract: Co-doped ZnO diluted magnetic semiconductor as a novel photoelectric beacon was first constructed for photoelectrochemical (PEC) aptasensor of acetamiprid. The fabricated PEC sensing is based on the specific binding of acetamiprid and its aptamer, which induces the decreasement of enhanced photocurrent produced by the electron donor of quercetin. Co(2+) doping has a beneficial effect in extending the band width of light absorption of ZnO into the visible region and to promote the separation of the photoinduced carriers due to the sp-d exchange interactions existing between the band electrons and the localized d electrons of Co(2+). The fabricated aptasensor was linear with the concentration of acetamiprid in the range of 0.5-800 nmolL(-1) with the detection limit of 0.18 nmolL(-1). The presence of same concentration of other conventional pesticides did not interfere in the detection of acetamiprid and the recovery is between 96.2% and 103.7%. This novel PEC aptasensor has good performances with high sensitivity, good selectivity, low cost and portable features. The strategy of Co-doped ZnO diluted magnetic semiconductor paves a new way to improve the performances of PEC aptasensor.
authors.affiliation: School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, 211 East Jianjun Road, Yancheng 224051, PR China. Electronic address: hbli@ycit.edu.cn.
authors.forename: Hongbo
authors.initials: H
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, 211 East Jianjun Road, Yancheng 224051, PR China; School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Yunfei
authors.initials: Y
authors.lastname: Qiao
authors.affiliation: School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, 211 East Jianjun Road, Yancheng 224051, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, 211 East Jianjun Road, Yancheng 224051, PR China.
authors.forename: Hailin
authors.initials: H
authors.lastname: Fang
authors.affiliation: School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, 211 East Jianjun Road, Yancheng 224051, PR China.
authors.forename: Dahe
authors.initials: D
authors.lastname: Fan
authors.affiliation: School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, 211 East Jianjun Road, Yancheng 224051, PR China. Electronic address: wangw@ycit.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
mesh_terms: D052157:Aptamers, Nucleotide / Q000737:chemistry*; D015374:Biosensing Techniques / Q000295:instrumentation*; D003035:Cobalt / Q000737:chemistry*; D003217:Conductometry / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D000073943:Neonicotinoids; D010575:Pesticides / Q000032:analysis; D010777:Photochemistry / Q000295:instrumentation; D011725:Pyridines / Q000032:analysis*; D012666:Semiconductors; D013194:Staining and Labeling; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: D052157:Aptamers, Nucleotide; D058185:Magnetite Nanoparticles; D000073943:Neonicotinoids; D010575:Pesticides; D011725:Pyridines; D003035:Cobalt; C464485:acetamiprid; D015034:Zinc Oxide
keywords: Acetamiprid; Aptasensor; Diluted magnetic semiconductor; Photoelectrochemical