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Synthesis of self-assembled siloxane–polyindole–gold nanoparticle polymeric nanofluid for biomedical membranes

Published online by Cambridge University Press:  29 June 2020

Prem C. Pandey
Affiliation:
Department of Chemistry, Indian Institute of Technology (BHU), Varanasi221005, India
Naman Katyal
Affiliation:
Department of Chemistry, Indian Institute of Technology (BHU), Varanasi221005, India
Govind Pandey
Affiliation:
Department of Pediatrics, King George Medical University, Lucknow226003, India
Roger J. Narayan*
Affiliation:
Joint Department of Biomedical Engineering, University of North Carolina and North Carolina State University, Raleigh, NC27599-7115, USA
*
Address all correspondence to Roger J. Narayan at rjnaraya@ncsu.edu
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Abstract

In this paper, the Lewis base character of 3-aminopropyltrimethoxysilane (3-APTMS), an imine derivative of siloxane, and an indole monomer were shown to enable the reduction of gold cations in acetone. The Lewis acid–base adduct of indole monomers and gold formed a polyindole–gold nanoparticle sol. Similarly, the Lewis acid–base adduct of 3-APTMS and gold enabled the formation of gold nanoparticles in the presence of acetone. The polyindole–gold nanoparticle sol and siloxane–gold nanoparticles underwent self-assembly into a polymeric nanofluid that was suitable for casting membranes. The use of these membranes as a potentiometric ion sensor for both cations and anions was considered; a common nonspecific ion exchange molecule, sodium tetraphenylborate, and the polymeric nanofluid were used to prepare an anion sensor and a cation sensor.

Type
Research Letters
Copyright
Copyright © Materials Research Society, 2020

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