Article Back

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:
639 views / 319 downloads
View Full-text Download PDF
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

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Scroll to Top