Journal
APPLIED SURFACE SCIENCE
Volume 328, Issue -, Pages 170-176Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.12.035
Keywords
Microrods; Boron carbide; Pulsed laser deposition
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Funding
- MICINN, Spain [CTQ2010-15680, MAT2012-38045-004-01, CTQ 2013-43086]
- MINECO (CSIC) [FPI 2011, JAE-TEC 2010]
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Micrometric size rods have been fabricated via pulsed laser deposition in vacuum from boron carbide targets using nanosecond pulses of 1064 and 266 nm and room temperature Si (1 0 0) substrates. Morphological, structural and chemical characterization of the microrods was made by applying scanning electron microscopy, focussed ion beam microscopy coupled to secondary ion mass spectrometry, Xray diffraction, X-ray photoelectron spectroscopy and micro-Raman spectroscopy. Ablation at 1064 nm favours the formation of microrods with high aspect ratio, sharp edges and pyramidal tips, typically 10 mu m long with a cross section of around 2 mu m x 2 mu m. Differently, at 266 nm the microrods are of smaller size and present a more globular aspect. The analyses of the microrods provide information about their crystalline nature and composition, based on a mixture which includes boron, boron oxide and boron carbide, and allows discussion of the wavelength dependent growth mechanisms involved. (C) 2014 Elsevier B.V. All rights reserved.
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