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Facile Shape-Controlled Fabrication of Copper Nanostructures on Borophosphate Glasses: Synthesis, Characterization, and Their Highly Sensitive Surface-Enhanced Raman Scattering (SERS) Properties

2016; American Chemical Society; Volume: 120; Issue: 22 Linguagem: Inglês

10.1021/acs.jpcc.6b02881

1932-7455

Anderson J. Pereira, Joaquim P. Gomes, Guilherme Felipe Lenz, Ricardo Schneider, Juliano A. Chaker, Paulo Eduardo Narcizo de Souza, Jorlandio F. Felix,

Nanocluster Synthesis and Applications

We demonstrate air-stable copper-doped nanostructured borophosphate samples, which were prepared by a facile, low cost, and green synthesis method. The thermal annealing, in a reducing hydrogen atmosphere, enables the formation of metallic copper nanostructures, which was confirmed by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and optical absorption. The optical spectra show a main intense surface plasmon resonance (SPR) band centered at 579 nm. The shapes of the nanostructures, morphology, and thickness of the copper nanostructures coating are chosen to be suitable for SERS applications. These samples exhibited very high SERS enhancement factors (EF), depending on thermal annealing time, with excellent reproducibility. The estimated EFs have been found in the range between 107 and 108.