Journal
ELECTROCHIMICA ACTA
Volume 173, Issue -, Pages 705-714Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.05.112
Keywords
molybdenum oxide; electrodeposition; cationic surfactant; X-ray diffraction; mechanical properties
Categories
Funding
- Generalitat de Catalunya [2014-SGR-1015]
- Spanish Ministerio de Economia y Competitividad (MINECO) [MAT2011-27380-C02-01, CTS-11/07]
- MINECO for the 'Ramon y Cajal' [RYC-2012-10839]
- Secretary for Universities and Research of the Government of Catalonia
- COFUND Programme of the Marie Curie Actions of the 7th R&D Framework Programme of the European Union for the 'Beatriu de Pinos' [2013 BP-B 00077]
- ICREA-Academia Award
- ICREA Funding Source: Custom
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1.5 mu m-thick molybdenum oxide films have been electrodeposited potentiostatically from 0.2 M Na2MoO4 electrolyte onto indium tin oxide (ITO)/glass substrates at pH = 1, 6 and 9. The influence of cetyltrimethylammonium bromide (CTAB) surfactant on films' adhesion, morphology, degree of porosity, molybdenum speciation, and crystallographic structure has been systematically investigated. The addition of CTAB (0.01 M) to the bath clearly improves film adherence to the substrate, reduces cracking, and increases crystallinity. This has an impact on the physical properties of the films. In particular, both hardness (H) and Young's modulus (E) increase, as determined from nanoindentation tests. The growth of ordered arrays of molybdenum oxide submicrometer structures, including pillars and stripes, by electrodeposition onto e-beam lithographed Au/Ti/Si substrates is also reported. (C)2015 Elsevier Ltd. All rights reserved.
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