Authors: N. Sarlak, Z. Sameri, T.J. Meyer, K. Shaabani, R. Pourrahim
Affilation: University of North Carolina at Chapel Hill, United States
Pages: 194 - 197
Keywords: MWCNT-g-PCA/Au, optical sensor, triacetylcellulose, thiourea
The characterization of an optical absorption based one-shot sensor is described for the determination of thiourea based on the immobilization of new nanocomposite of MWCNT-graft-poly(citric acid)/Au on a triacetylcellulose membrane. So Multiwalled carbon nanotubes were functionalized and the encapsulation of the gold nanoparticles was also investigated. Fig.1 shows the TEM images of encapsulated gold nanoparticles in the PCA shell of the CNT-g-PCA. It is clear that nanoparticles are placed on the surface of CNTs which confirmed nanoparticles are fitted on the CNT wall by PCA shell. Then MWCNT-g-PCA/Au is covalently bonded to a transparent triacetylcellulose film. The surface topology of the modified membrane was characterized by SEM.