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Manipulating plasmonic hotspots via controlled dewetting of Au thin films as a scalable platform for robust biomolecular SERS Sensing
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DOI：10.1016/j.physb.2026.418789.png)
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Abstract
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• Demonstrated solid-state dewetting as a robust, single-step, and wafer-scalable method for direct Au nanostructure integration. • Identified initial film thickness as the primary governing factor for dewetting onset and morphology. • Thinner films (≤6 nm) produced high-density electromagnetic hotspots with intense near-field confinement. • Achieved successful SERS detection of BSA, overcoming typical fluorescence and vibrational overlap challenges. • Established a direct link between thickness-dependent morphology and resulting SERS sensing performance.
Keywords:
plasmonic hotspots
solid-state dewetting
Au thin films
SERS sensing
biomolecular detection
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