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The cost-effective assemble of Au nanodots on TiO2 substrate over a large domain for high-sensitivity and reproducible surface enhanced Raman spectroscopy (SERS) is demonstrated. Au nanoparticles of defined size are immobilized on TiO2 to form high-density Au nanodots with removal of surface ligand meanwhile. The Au nanodots exhibit pronounced surface Plasmon resonance (SPR) due to strong interparticle...
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