Abstract
By one-pot wet chemical method, Pt-based hollow nanostructures were synthesized at room temperature. Because of the highly damping optical response of the metal, these Pt-based hollow nanostructures exhibited weak thermal effects with a laser focal spot on 4-aminothiophenol (PATP) molecules limiting dimerisation. The isolated surface enhanced Raman scattering (SERS) spectra of PATP, in which the vibrational bands from 4,4′-dimercaptoazobenzene (DMAB) molecules are not observed, were able to be seen, and this was in good agreement with the Raman spectra of PATP powder. In addition, the concentration of PATP molecules was varied, and the illumination time was increased to 2000 s, respectively. It was found that spectra were stable with varied PATP concentrations, and the plasmon-driven chemical conversion of PATP to DMAB was still suppressed, even when the laser illumination time was increased to 2000 s.
Highlights
Nanomaterials can exhibit unique properties due to the size effects, when compared to their bulk conterparts [1,2,3,4,5]
Current accepted knowledge suggests that noble metals (Au, Ag, and Cu) are the best materials as surface enhanced Raman scattering (SERS) substrates, with high enhancement factors [19], and they have been widely applied in Raman detection since the discovery of SERS in
The morphology of the as-prepared products was investigated by Scanning electronmicroscope microscope (SEM) at different magnifications
Summary
Nanomaterials can exhibit unique properties due to the size effects, when compared to their bulk conterparts [1,2,3,4,5]. The hollow nanostructure has attracted significant attention owing to its high surface area [6], low density, and potential applications in a series of technologies, such as catalysis [7], optical detection [8,9,10,11], and photothermal therapy [12]. It is of interest to explore hollow-structured nanomaterials in the hope of disclosing their important physical properties. The SPR effect can be utilized in the analytical technique of surface enhanced Raman scattering (SERS) [15,16,17,18]. Current accepted knowledge suggests that noble metals (Au, Ag, and Cu) are the best materials as SERS substrates, with high enhancement factors [19], and they have been widely applied in Raman detection since the discovery of SERS in
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