Journal
BIOSENSORS & BIOELECTRONICS
Volume 61, Issue -, Pages 209-214Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2014.04.058
Keywords
Polybrominated diphenyl ether; Photoelectrochemical; Quantum dots; Immunosensor; Macroporous ZnO nanosheet
Categories
Funding
- National Basic Research Program of China [2009CB421601]
- National Natural Science Foundation of China [21175038, 21235002]
Ask authors/readers for more resources
A novel photoelectrochemical (PEC) immunosensor for the rapid detection of 2,3 ',4,5 ',6-pentabromodiphenylether (BDE-121) was developed by coating a core-shell ZnS/CdTe/Mn-CdS/ZnS sensitized macroporous ZnO nanosheet (NS) photoelectrode with anti-BDE-121 polyclonal antibody. Here, coreshell CdTe/Mn-CdS quantum dots (QDs) benefit the signal amplification and photostability of the co-sensitized ZnO NS photoelectrode. After introducing the ZnS buffer layers between different interfaces (the ZnO NS and sensitizers; sensitizers and the electrolyte), the photoresponse was further enhanced. Under standard simulated illumination, the saturation photocurrent density of the co-sensitized photoelectrode is 6.23 mA cm(-2), the highest value reported to date for ZnO NS based photoelectrode. The BDE-121 was detected by monitoring the changes of the photocurrent signals of the immunosensor resulting from the immunoreaction. The immunosensor is sensitive, stable and highly specific toward BDE-121, displaying a linear range of 5 pM to 100 nM with a limit of detection of 3.98 pM. BDE-121 in paint samples was analyzed with the proposed sensor and gas chromatography-mass spectrometry (GC/MS), giving contents of 1.32 +/- 0.02 ng mL(-1) and 1.16 ng mL(-1), respectively. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available