Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 32, Pages 17582-17586Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b05161
Keywords
hierarchical nanostructures; gold nanowires; silicon nanowire arrays; SERS substrates; ultrasensitive detection
Funding
- Ministry of Science, ICT & Future Planning of Korea [NRF-2013M3C8A3078512]
- Natural Science Foundation of China [21404110, 51473179]
- Defense Acquisition Program Administration and Agency for Defense Development [UD140080GD]
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One-dimensional (1D) micro- and nanostructures have become increasingly popular because of their tremendous prospect in various applications. While the design and fabrication of these structures from a single component in two-dimensional (2D) arrays is common, the attainment of hierarchical three-dimensional (3D) architectures made up of multicomponent one-dimensional structures is rare. Herein we report, for the first time, the lateral growth of gold nanowires from the sidewalls of substrate grown silicon micropillars to form a unique wire-on-pillar architecture. Unlike zero-dimensional (OD) point-like, 1D linear, and 2D planar Au structures, the obtained 3D wire-on-pillar Au architecture provides abundant hotspots between adjacent Au wires, which led to remarkably high surface-enhanced Raman scattering (SERS) signals.
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