Study on the Photoelectric Properties of CdSe/MS Composite Film and its Potential Application in Biosensor Field

Abstract:

CdSe nanocrystals were prepared within a template of mesoporous silica (MS) spheres via chemical reaction. The photocurrent of CdSe/MS composite under UV illumination was distinctly higher than that in the dark. The horseradish peroxidase (HRP) was immobilized on the surface of the composite particles. The HRP/CdSe/MS composite film toward the reduction of hydrogen peroxide (H2O2) had stronger response signal under UV illumination than that in the dark. The electrons photo-generated from CdSe and the electrons provided by electrode can occur simultaneously to catalyze the reduction of H2O2. The holes photo-generated by CdSe are trapped at the interface between CdSe and pore walls of MS film. The results show that CdSe/MS composite film has good photoelectric properties and potential application on immobilization of horseradish peroxidase for hydrogen peroxide monitoring.

• Periodical: Advanced Materials Research (Volumes 560-561)
• Pages: 688-693
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.560-561.688
• Online since: August 2012
• Authors: Ping Wang, Li Hua Cheng, Ru Jin Zhou
• Keywords: Biosensor, CdSe/MS Thin Film, Horseradish Peroxidase (HRP), Photoelectric Properties, UV Illumination

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