Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 21, Issue 5, Pages 2611-2618Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cp07305h
Keywords
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Funding
- National Key RAMP
- D Program of China [2017YFA0403600]
- National Natural Science Foundation of China [11874108]
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Transition metal oxide semiconductors have been explored in surface-enhanced Raman scattering (SERS) active substrates, yet their detection sensitivity and enhancement effects are inferior. What's more, the reported fabrication technique ignored the effects of the electromagnetic mechanisms and was far from satisfactory for practical applications. Herein, we report on a convenient nanotechnique to fabricate large-area hexagon plum-blossom-like WO3-x nanoarrays based on aluminum nanobowl array substrates. Localized surface plasmon resonance can be increased via adjusting the time of tungsten magnetron sputtering with H-2 annealing treatment. The introduction of a double-switch experiment demonstrates that localized surface plasmon-coupled photoinduced charge transfer can not only increase SERS enhancement comparable to similar silver nanostructures but also implement a low limit of detection below 10(-9) M. A triple-switch experiment offers specific rules in the molecular detection of WO3-x semiconductors and important guidance for the fabrication of SERS-active semiconducting platforms.
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