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

Zvátora P, Rezanka P, Prokopec V, Siegel J, Svorčík V, Král V - Nanoscale Res Lett (2011)

Bottom Line: 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.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Analytical Chemistry, Institute of Chemical Technology Prague, Technická 5, 16628, Prague 6, Czech Republic. vladimir.kral@vscht.cz.

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.

No MeSH data available.


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(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).
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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).

Mentions: The average diameter of the prepared spherically shaped AuNPs electrostatically stabilized with citrate was about 15 nm and for AgNPs was about 45 nm. The wavelengths of their surface plasmon absorbance maximums (AuNPs at 520 nm and AgNPs at 430 nm) correspond well with the averages diameters estimated by TEM [21,23] (Figure 3).


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

Zvátora P, Rezanka P, Prokopec V, Siegel J, Svorčík V, Král V - Nanoscale Res Lett (2011)

(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).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211456&req=5

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).
Mentions: The average diameter of the prepared spherically shaped AuNPs electrostatically stabilized with citrate was about 15 nm and for AgNPs was about 45 nm. The wavelengths of their surface plasmon absorbance maximums (AuNPs at 520 nm and AgNPs at 430 nm) correspond well with the averages diameters estimated by TEM [21,23] (Figure 3).

Bottom Line: 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.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Analytical Chemistry, Institute of Chemical Technology Prague, Technická 5, 16628, Prague 6, Czech Republic. vladimir.kral@vscht.cz.

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.

No MeSH data available.


Related in: MedlinePlus