Substrate engineering for Ni-assisted growth of carbon nano-tubes
2012 (English)In: Materials Science & Engineering: B. Solid-state Materials for Advanced Technology, ISSN 0921-5107, Vol. 177, no 17, 1542-1546 p.Article in journal (Refereed) Published
The growth of carbon multi-walled nano-tubes (MWCNTs) using metal catalyst (e.g. Ni, Co, and Fe) has been extensively investigated during the last decade. In general, the physical properties of CNTs depend on the type, quality and diameter of the tubes. One of the parameters which affects the diameter of a MWCNT is the size of the catalyst metal islands. Considering Ni as the metal catalyst, the formed silicide layer agglomerates (island formation) after a thermal treatment. One way to decrease the size of Ni islands is to apply SiGe as the base for the growth. In this study, different methods based on substrate engineering are proposed to change/control the MWCNT diameters. These include (i) well-controlled oxide openings containing Ni to miniaturize the metal island size, and (ii) growth on strained or partially relaxed SiGe layers for smaller Ni silicide islands.
Place, publisher, year, edition, pages
2012. Vol. 177, no 17, 1542-1546 p.
Carbon nano-tube, Hole colloidal lithography, Metal catalyst growth, PECVD, SiGe
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-103536DOI: 10.1016/j.mseb.2012.01.021ISI: 000309853000005ScopusID: 2-s2.0-84866344927OAI: oai:DiVA.org:kth-103536DiVA: diva2:560559
QC 201210152012-10-152012-10-152012-11-19Bibliographically approved