Issue 19, 2013

A photoelectrochemical immunosensor for tris(2,3-dibromopropyl) isocyanurate detection with a multiple hybrid CdTe/Au–TiO2nanotube arrays

Abstract

In this paper, tris(2,3-dibromopropyl) isocyanurate (TBC) is for the first time as far as we know determined by ultrasensitive photoelectrochemical (PEC) immunoassay using an antibody-modified ternary hybrid CdTe/Au–TiO2 nanotube arrays (NTAs) photoelectrode, developed by the pulse electrodeposition technique. The as-prepared hybrid shows enhanced photon absorption and photocurrent response, which subsequently increased the photoelectrical conversion efficiency in the visible region. TBC-antibody (Ab) was developed in rabbits as a result of immunization with the BSA–TBC conjugate and covalently cross-linked onto the CdTe/Au–TiO2 NTAs. Since the photocurrent is highly dependent on the TiO2 surface properties, the specific interaction between TBC and the antibody results in a sensitive change in the photocurrent, which displayed a linear range of 5.0 × 10−11 to 5.0 × 10−5 M and a low detection limit of 5.0 × 10−11 M for TBC determination. This proposed strategy highlights the application of TiO2 nanotube in visible-light-activated photoelectrochemical biosensing, which could largely reduce the destructive effect of UV light on biomolecules.

Graphical abstract: A photoelectrochemical immunosensor for tris(2,3-dibromopropyl) isocyanurate detection with a multiple hybrid CdTe/Au–TiO2 nanotube arrays

Supplementary files

Article information

Article type
Paper
Submitted
13 May 2013
Accepted
02 Jul 2013
First published
02 Jul 2013

Analyst, 2013,138, 5726-5733

A photoelectrochemical immunosensor for tris(2,3-dibromopropyl) isocyanurate detection with a multiple hybrid CdTe/Au–TiO2 nanotube arrays

H. Feng, L. Zhou, J. Li, T. Tran.T, N. Wang, L. Yuan, Z. Yan and Q. Cai, Analyst, 2013, 138, 5726 DOI: 10.1039/C3AN00956D

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