Facile fabrication of porous silicon nanowires using water-based polyvinyl alcohol/silicon tetraacetate solution
- Authors
- Cho, Daehwan; Jeong, Youngjin
- Issue Date
- 1-Dec-2015
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Polyvinyl alcohol; Silicon tetraacetate; Magnesium; Porous silicon
- Citation
- MATERIALS LETTERS, v.160, pp.503 - 506
- Journal Title
- MATERIALS LETTERS
- Volume
- 160
- Start Page
- 503
- End Page
- 506
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/8541
- DOI
- 10.1016/j.matlet.2015.08.013
- ISSN
- 0167-577X
- Abstract
- The fabrication of porous silicon nanowires has been studied for various applications such as lighting-emitting diodes, photovoltaics, and energy storage devices. A water-based spinning dope containing polyvinyl alcohol (PVA) and silicon tetraacetate precursor was electrospun to form nanowires, in which the silicon precursors were supported by PVA back-boned chains. The fabricated nanowires were calcined in an air furnace in order to remove the PVA polymer from the as-spun nanowires and form a silicon oxide nanowire. To reduce the silicon oxide nanowires, they were exposed to a magnesium vapor in a high-level vacuum (10(-4) torr) at high temperatures of 650-1100 degrees C, followed by 0.5-3.0 M HCI treatment to remove the formed MgO crystals in the reduced nanowires. The fabricated nanowires exhibited porous/linear structures with diameters ranging from 100 nm to 300 nm. This facile technique is suitable to mass-produce porous silicon nanowires for use in the various applications. (C) 2015 Elsevier B.V. All rights reserved.
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