Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2011 Apr 28;6(1):366.
doi: 10.1186/1556-276X-6-366.

Polytetrafluorethylene-Au as a substrate for surface-enhanced Raman spectroscopy

Pavel Zvátora  1 , Pavel Rezanka, Vadym Prokopec, Jakub Siegel, Václav Svorčík, Vladimír Král
Affiliations

Polytetrafluorethylene-Au as a substrate for surface-enhanced Raman spectroscopy

Pavel Zvátora et al. Nanoscale Res Lett. .

Abstract

This study deals with preparation of substrates suitable for surface-enhanced Raman spectroscopy (SERS) applications by sputtering deposition of gold layer on the polytetrafluorethylene (PTFE) foil. Time of sputtering was investigated with respect to the surface properties. The ability of PTFE-Au substrates to enhance Raman signals was investigated by immobilization of biphenyl-4,4'-dithiol (BFD) from the solutions with various concentrations. BFD was also used for preparation of sandwich structures with Au or Ag nanoparticles by two different procedures. Results showed that PTFE can be used for fabrication of SERS active substrate with easy handle properties at low cost. This substrate was sufficient for the measurement of SERS spectrum of BFD even at 10-8 mol/l concentration.

PubMed Disclaimer

Figures

Figure 1
Figure 1
Dependence of the thickness of gold layer on time of sputtering (dash line) and resistance values of this gold layer (solid line).
Figure 2
Figure 2
(a) Preparation of sandwich structures using modified nanoparticles. (b) Preparation of sandwich structures using modified gold layer.
Figure 3
Figure 3
(a) UV-Vis absorption spectra of the AuNPs and TEM image (in excision); (b) UV-Vis absorption spectra of the AgNPs and TEM image (in excision).
Figure 4
Figure 4
(a) Raman spectrum of pure BFD; (b) SERS spectrum of immobilized BFD (c = 10-2 mol/l) on the PTFE-Au; (c) SERS spectrum of immobilized BFD (c = 10-8 mol/l) on the PTFE-Au with AgNP (prepared by Figure 2b); (d) SERS spectrum of immobilized BFD (c = 10-8 mol/l) on the PTFE-Au with AuNP (prepared by Figure 2b); (e) Raman spectrum of pure PTFE.
Figure 5
Figure 5
SERS spectra of BFD on PTFE-Au for (a) 30 s, (b) 20 s, (c) 50 s, (d) 80 s, (e) 150 s, (f) 10 s sputtering time. Spectra were shifted in y-axis.
See this image and copyright information in PMC

References

    1. Moskovits M. Surface-enhanced spectroscopy. Rev Mod Phys. 1985;57:783. doi: 10.1103/RevModPhys.57.783. - DOI
    1. Campion A, Kambhampati P. Surface-enhanced Raman scattering. Chem Soc Rev. 1998;27:241. doi: 10.1039/a827241z. - DOI
    1. Sant'Ana AC, Rocha TCR, Santos PS, Zanchet D, Temperini MLA. Size-dependent SERS enhancement of colloidal silver nanoplates: the case of 2-amino-5-nitropyridine. J Raman Spectrosc. 2009;40:183. doi: 10.1002/jrs.2103. - DOI
    1. Jeanmaire DL, Van Duyne RP. Surface Raman spectroelectrochemistry Part I. heterocyclic, aromatic, and aliphatic amines adsorbed on the anodized silver electrode. J Electroanal Chem. 1977;84:1. doi: 10.1016/S0022-0728(77)80224-6. - DOI
    1. Albrecht MG, Creighton JA. Anomalously intense Raman spectra of pyridine at a silver electrode. J Am Chem Soc. 1977;99:5215. doi: 10.1021/ja00457a071. - DOI

LinkOut - more resources