Effective Patterning of Metal Nanoparticles on Sapphire Surface for Aligned Growth of Single-Walled Carbon Nanotubes
- Details
- Category: Molybdenum & Sapphire Growth Furnace News
- Published on 06 January 2014
- Written by Cloudy
- Hits: 243
We studied patterning of metal nanoparticle catalyst on sapphire (α-Al2O3) substrates to grow horizontally-
aligned single-walled carbon nanotubes (SWNTs) from defined positions. Various modifications of sapphire surface were investigated for effective adsorption of iron oxide nanoparticles. We found that phosphoric acids bind to sapphire surface and enhance the adsorption of the nanoparticles. This surface modification enabled effective patterning of nanoparticle via electron beam lithography. The small nanoparticles with a mean diameter of 5 nm tended to diffuse at high temperature during the nanotube growth, while the large particles with 12 nm mean diameter mostly stayed at the same position giving aligned SWNTs grown from the catalyst pattern.
The present-day trend towards the development of nanostructures has resulted in several interesting material systems with unique and, in some cases, novel properties. Gallium nitride nanowires and nanodimensional structures have been realized using a simpler approach of vapour phase-assisted deposition.
More molybdenum product: http://www.molybdenum.com.cn
Tel: 0592-5129696 Fax：0592-5129797
E-mail:
This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Price: http://www.chinatungsten.com
sales@chinatungsten.com