Voltammetry and electrochemical impedance spectroscopy of gold electrodes modified with CdTe quantum dots and their conjugates with nickel tetraamino phthalocyanine |
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| Authors: | Samson KheneSharon Moeno Tebello Nyokong |
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| Institution: | Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa |
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| Abstract: | This work reports on the synthesis of conjugates of cadmium telluride quantum dots (CdTe-QDs) caped with thioglycolic acid and peripherally substituted nickel tetraamino phthalocyanine (NiTAPc) complex. The conjugates are characterized using cyclic (CV) and differential pulse (DPV) voltammetries, electrochemical impedance spectroscopy, X-ray powder diffraction, infrared spectroscopy, Raman spectroscopy, atomic force microscopy and time correlated single photon counting. CV and DPV show that NiTAPc stabilizes the CdTe QDs against oxidation to metallic products. |
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| Keywords: | Nickel tetraamino phthalocyanine CdTe quantum dots Cyclic voltammetry Electrochemical impedance spectroscopy Atomic force microscopy |
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