MONOLAYERS OF PLATINUM NANOPARTICLES PREPARED BY DIP-COATING

1 ČERNOHORSKÝ Ondřej
Co-authors:
1 GRYM Jan 1 YATSKIV Roman 2 PHAM Viet Hung 3 HUDRY Damien 2,3 DICKERSON James H.
Institutions:
1 Institute of Photonics and Electronics of the CAS, Chaberská 57, Prague, 18251, Czech Republic
2 Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York, 11973, USA
3 Department of Physics, Brown University, Providence, Rhode Island, 02912, USA
Conference:
7th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 14th - 16th 2015
Proceedings:
Proceedings 7th International Conference on Nanomaterials - Research & Application
Pages:
73-78
ISBN:
978-80-87294-59-8
ISSN:
2694-930X
Published:
11th January 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
17 views / 10 downloads
Abstract

Platinum is a transition metal known for its catalytic properties, which are further enhanced when employed in a nanoparticle form. We have recently shown that a monolayer of Pt nanoparticles deposited on semiconductor substrates forms high quality Schottky diodes, which were used in sensitive hydrogen sensors with a detection limit of 1 ppm of H2 in N2. Preparation of ordered monolayers of Pt nanoparticles is essential for the understanding of the behaviour of such an interface. To obtain a hexagonal closed-packed nanoparticle array, we prepared Pt nanoparticles stabilized by oleylamine and oleic acid with a narrow size distribution and uniform shapes. A monolayer prepared by dip-coating of Si substrate in the suspension containing Pt nanoparticles showed hexagonal arrangement within separate domains with the surface coverage up to 90%. The increase of the surface coverage with increasing withdrawal speed of the dip-coating process was observed.

Keywords: Pt nanoparticles, oleylamine, dip coating, self-assembly
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