Design and characteristics of an optical nanosensor based on immobilization of MWCNTs-g-PCA-Au on a triacetylcellulose membrane for determination trace amounts of thiourea

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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.

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Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2013: Advanced Materials, CNTs, Particles, Films and Composites (Volume 1)
Published: May 12, 2013
Pages: 194 - 197
Industry sector: Advanced Materials & Manufacturing
Topic: Materials Characterization & Imaging
ISBN: 978-1-4822-0581-7