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Growth, Optical Characterization and Modelling of ZnO Nanorods on Si, SiC and Macroporous Si Structure
Instituto de Física, Universidade Federal da Bahia, Ondina, Salvador-Ba, Brazil .
CETEC-Universidade Federal do Recôncavo da Bahia, Cruz das Almas-Ba, Brazil and Instituto de Física, Universidade Federal da Bahia, Ondina, Salvador-Ba, Brazil.
Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden.
Racah Institute of Physics and the Center for Nanoscience and Nanotechnology, the Hebrew University of Jerusalem, Jerusalem, Israel.
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2009 (English)In: Nanotech 2009 Vol. 3Nanotechnology 2009: Biofuels, Renewable Energy, Coatings, Fluidics and Compact Modeling: Technical proceedings of the 2009 NSTI Nanotechnology Conference and Expo, May 3-7, 2009, George R. Brown Convention Center, Houston, Texas, U.S.A, Austin, TX, USA: Nano Science and Technology Institute , 2009, 206-209 p.Conference paper, Published paper (Other academic)
Abstract [en]

Zinc Oxide (ZnO) and 4H-SiC are prominent materials with large applicability such as optoelectronic nanodevices and for instance ultraviolet detectors. There is lack of more information about optical transitions beyond the indirect band gap energy (BGE) of 4H-SiC and even more for ZnO direct BGE grown on the former material. Using the vapor-liquid-solid and the aqueous chemical growth methods we have grown ZnO nanorods on different substrates, such as quartz, n- and p-type silicon porous silicon and n-type 4H-SiC. The Scanning electron microscopy (SEM) are shown and compared for all samples. We have calculated the absorption and energy gap by employing a first-principle and a full-potential linearized augmented plane-wave (FPLAPW) method within the local density approximation (LDA). The absorption of ZnO nanorods, on different substrates, is lower than that of quartz substrate when photon energy is low. It is shown the strong effect of 4H-SiC on ZnO nanorods. Experiment and theory show a good aggreement when the optical energy gap is considered for both materials.

Place, publisher, year, edition, pages
Austin, TX, USA: Nano Science and Technology Institute , 2009. 206-209 p.
Keyword [en]
nanorods, ZnO, SiC, macroporous
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-44671Local ID: 77264ISBN: 978-1-4398-1784-1 (print)OAI: oai:DiVA.org:liu-44671DiVA: diva2:265533
Conference
The 2009 NSTI Nanotechnology Conference and Expo, Houston, Texas, USA, May 3-7, 2009
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2014-04-16Bibliographically approved

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Willander, Magnus

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