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Unveiling mechanism of surface-guided platinum nanowire growth

Journal Article · · Journal of Materials Science
We report surface-guided growth of non-planar nanowires on functional substrates offers the new opportunity to precisely control their diameter, length, density and alignment, which will greatly benefit their direct integration into practical devices for large-scale applications. However, control of noble metal nanowires growth and arrangement remains a great challenge, and the mechanistic understanding is still limited. Herein, we choose Pt as a model material system to study the synthesis conditions required to control the in situ growth of aligned Pt nanowires on flat titanium substrate via a one-step and room-temperature green chemical synthesis process in aqueous solution. Most importantly, it is for the first time discovered that ordered nanoarrays and self-assembled nanoflowers can be directly grown on flat Ti substrate by merely adjusting the reaction times, without use of any soft/hard templates, surfactants and organic solvents. The proposed surface-guided growth mechanisms for nanoarray and nanoflower formation in this study may shed light on understanding of oriented arrangement/assembly of one-dimensional Pt nanowires into desirable morphologies for a variety of practical device applications.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Skyre, Inc., East Hartford, CT (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Fuel Cell Technologies Office; USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725; AC36-08GO28308; EE0008423; EE0008426; FE0011585
OSTI ID:
1883698
Alternate ID(s):
OSTI ID: 2335463
Journal Information:
Journal of Materials Science, Journal Name: Journal of Materials Science Journal Issue: 27 Vol. 57; ISSN 0022-2461
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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