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Title: A new approach of the synthesis of SiO 2 nanowires by using bulk copper foils as catalyst

In this paper, a novel procedure for the growth of SiO 2 nanowires (SiO 2NWs) directly from polycrystalline copper foils is reported. The single-step synthesis procedure consists of a thermal treatment at 900°C without the need for additional catalysts. As a result, nanowires with an average diameter of 100 nm are synthesized. A systematic study undertaken at different stages of the SiO 2NWs growth confirmed the generation of nucleation centers on the Cu surface, as well as revealed the existence of an intermediate gaseous SiO species at the synthesis temperature. Lastly, on the basis of these evidences, the vapor-liquid-solid (VLS) route has been proposed as the mechanism responsible for the growth.
Authors:
 [1] ;  [2] ;  [3]
  1. Universidad Autonoma de Madrid (Spain). Departamento de Fisica Aplicada and Instituto Nicolas Cabrera
  2. University of Turabo, Gurabo, PR (United States). Nanomaterials Research Group, School of Natural Sciences and Technology
  3. Universidad Autonoma de Madrid (Spain). Departamento de Fisica Aplicada and Instituto Nicolas Cabrera
Publication Date:
Grant/Contract Number:
NA0000672; ENE2014-57977-C2-1-R
Type:
Accepted Manuscript
Journal Name:
Applied Surface Science
Additional Journal Information:
Journal Volume: 387; Journal ID: ISSN 0169-4332
Publisher:
Elsevier
Research Org:
University of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Silica nanowires; Catalytic Cu centers; VLS process; CVD; Gaseous SiO species; Nanowires protective against Cu oxidation
OSTI Identifier:
1335965
Alternate Identifier(s):
OSTI ID: 1358803