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Effect of quench on crystallinity and alignment of boron nanowires
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
KTH, Superseded Departments, Materials Science and Engineering.
2004 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 84, no 15, 2892-2894 p.Article in journal (Refereed) Published
Abstract [en]

Fabrication of aligned single-crystalline boron nanowire (BNW) arrays has been a challenge so far. This motivated us to investigate the effect of quench on the crystallinity and alignment of BNW films made in a thermal vapor transfer process on Au-coated Si substrates. A remarkable improvement in both crystallinity and alignment has been observed in BNW films quenched from processing temperatures greater than or equal to1100 degreesC. Without quench, the BNWs formed in the temperature range of 900-1100 degreesC are heavily tangled with either an amorphous or polycrystalline structure. If higher-temperature (greater than or equal to1100 degreesC) processing is followed by a quench, predominantly single-crystalline BNWs of a rhombohedral structure (a=10.94 A and c=23.83 A) and (031) orientation aligned along the normal of the substrates can be obtained. We speculate that the strain induced along the BNW at large temperature gradient is responsible for the observed quench effect.

Place, publisher, year, edition, pages
2004. Vol. 84, no 15, 2892-2894 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-44991DOI: 10.1063/1.1705720ISI: 000220728100058Scopus ID: 2-s2.0-2342614831OAI: oai:DiVA.org:kth-44991DiVA: diva2:452862
Note
QC 10111031Available from: 2011-10-31 Created: 2011-10-26 Last updated: 2017-12-08Bibliographically approved

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