Self-organization of gold nanoparticles on silanated surfaces

Htet H Kyaw; Salim H Al-Harthi; Azzouz Sellai; Joydeep Dutta

doi:10.3762/bjnano.6.242

Self-organization of gold nanoparticles on silanated surfaces

Beilstein J Nanotechnol. 2015 Dec 10:6:2345-53. doi: 10.3762/bjnano.6.242. eCollection 2015.

Authors

Htet H Kyaw¹, Salim H Al-Harthi¹, Azzouz Sellai¹, Joydeep Dutta²

Affiliations

¹ Physics Department, College of Science, Sultan Qaboos University, P.O. Box 36, Al-Khoudh, Muscat 123, Sultanate of Oman.
² Chair in Nanotechnology, Water Research Center, Sultan Qaboos University, PO Box 17, Al-Khoudh, Muscat 123, Sultanate of Oman; Functional Materials Division, School of Information and Communication Technology, KTH Royal Institute of Technology, Isafjordsgatan 22, SE-164 40 Kista Stockholm, Sweden.

Abstract

The self-organization of monolayer gold nanoparticles (AuNPs) on 3-aminopropyltriethoxysilane (APTES)-functionalized glass substrate is reported. The orientation of APTES molecules on glass substrates plays an important role in the interaction between AuNPs and APTES molecules on the glass substrates. Different orientations of APTES affect the self-organization of AuNps on APTES-functionalized glass substrates. The as grown monolayers and films annealed in ultrahigh vacuum and air (600 °C) were studied by water contact angle measurements, atomic force microscopy, X-ray photoelectron spectroscopy, UV-visible spectroscopy and ultraviolet photoelectron spectroscopy. Results of this study are fundamentally important and also can be applied for designing and modelling of surface plasmon resonance based sensor applications.

Keywords: 3-aminopropyletriethoxysilane; electrostatic interaction; functionalization; gold nanoparticles; self-assembled monolayer; self-organization.