Citation: LU Wei, XUE Fei, HUANG Shu-Yue, MENG Zi-Hui*, XUE Min. Molecularly Imprinted Colloidal Array for Detection of Explosives[J]. Chinese Journal of Analytical Chemistry, ;2012, 40(10): 1561-1566. doi: 10.3724/SP.J.1096.2012.11297 shu

Molecularly Imprinted Colloidal Array for Detection of Explosives

1.
School of Chemical & Environmental Enviromental Engineering, Beijing Institute of Technology, Beijing 100081, China

Corresponding author: MENG Zi-Hui*,
Received Date: 16 November 2011
Available Online: 31 March 2012
Fund Project: 本文系国家自然科学基金(No.20775007) (No.20775007) 环境毒理国家重点实验室(No.KF0904)资助 (No.KF0904)

The molecularly imprinted colloidal microspheres with good monodispersity were prepared by using trinitrotoluene (TNT) as template, and acrylamide as monomer and polymerizing by emulsion polymerization. The colloidal microspheres were self-assembled into array by vertical deposition method on a quartz slide, and then molecularly-imprinted colloidal array (MICA) which had opal structure was peeled off and immobilized on glue tape. In this research, the influence of different detection environments on optical response of MICA was discussed, as well as the specific adsorption capacity in response of the optimum testing environment. The results showed that the response of TNT at the concentration of 20 mmol/L in methanol-aqueous (7∶3, V/V) solution reached a redshift of 24 nm, which was 1.4 times of non-molecularly-imprinted colloidal array and 23 times of its analogues. MICA simplified the preparation process of photonic crystals sensor, and represented a noval highly selective, real-time "naked-eye" detection method for explosive.
- Photonic crystal,
- Molecularly imprinted colloidal array,
- Molecular imprinting,
- Trinitrotoluene
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