ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

3-Aminopropyltriethoxysilane (APTES) and heat treatment: a novel and simple route for gold nanoparticles anchored on silica substrate

Carla Requena Klimpovuz and Marcela Mohallem Oliveira

Department of Chemistry and Biology, Federal Technological University of Paraná (UTFPR), Curitiba, Brazil

E-mail: carlaklimpovuz@yahoo.com.br

Received: 30 July 2020  Accepted: 28 December 2020

Abstract:

Gold nanoparticles (AuNPs) synthesis in dispersion, passivated by different molecules, has been widely studied for many years. Moreover, incorporation or synthesis of these AuNPs on substrates also target different applications. However, there is little research on AuNPs synthesized directly anchored on the substrate, using an amino-functionalized molecule as a reducing agent. In this contribution, we report the synthesis of AuNPs anchored on silica substrate in which 3-aminopropyltriethoxisilane (APTES) acted both as functionalizing agent—anchoring metal ion on substrate—as well as a non-conventional reducing agent by heat treatment, resulting in a facile synthesis route. Results show that APTES use in reduction stage led to smaller AuNPs with very similar sizes—5 nm average diameter, resulting in AuNPs films anchored on silica substrate more homogeneous and reproducible than using the conventional reducing agent (sodium borohydride).

Keywords: Gold nanoparticles; Plasmon resonance; 3-Aminopropyltriethoxysilane; Heat treatment; Silica substrate

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-020-01499-2

Chemical Papers 75 (6) 2639–2646 (2021)