Homogenous high enhancement surface-enhanced Raman scattering (SERS) substrates by simple hierarchical tuning of gold nanofoams.

Autor: Koster HJ; Biomedical Engineering, University of California, Davis, USA., O'Toole HJ; Biomedical Engineering, University of California, Davis, USA., Chiu KL; Biomedical Engineering, University of California, Davis, USA., Rojalin T; Biomedical Engineering, University of California, Davis, USA., Carney RP; Biomedical Engineering, University of California, Davis, USA.
Jazyk: angličtina
Zdroj: Colloid and interface science communications [Colloid Interface Sci Commun] 2022 Mar; Vol. 47. Date of Electronic Publication: 2022 Feb 17.
DOI: 10.1016/j.colcom.2022.100596
Abstrakt: Surface enhanced Raman scattering (SERS) is a powerful tool for vibrational spectroscopy, providing orders of magnitude increase in chemical sensitivity compared to spontaneous Raman scattering. Yet it remains a challenge to synthesize robust, uniform SERS substrates quickly and easily. Lithographic approaches to produce substrates can achieve high, uniform sensitivity but are expensive and complex, thus difficult to scale. Facile solution-phase chemical approaches often result in unreliable SERS substrates due to heterogeneous arrangement of "hot spots" throughout the material. Here we demonstrate the synthesis and characterization of a homogeneous gold nanofoam (AuNF) substrate produced by a rapid, one-pot, four-ingredient synthetic approach. AuNFs are rapidly nucleated with macroscale porosity and then chemically roughened to produce nanoscale features that confer homogeneous and high signal enhancement (~10 9 ) across large areas, a comparable performance to lithographically produced substrates.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Databáze: MEDLINE
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