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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.

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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) Preparation of sandwich structures using modified nanoparticles. (b) Preparation of sandwich structures using modified gold layer.
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Figure 2: (a) Preparation of sandwich structures using modified nanoparticles. (b) Preparation of sandwich structures using modified gold layer.

Mentions: The sandwich structures were prepared by two procedures. In the first one (Figure 2a), the gold foils were modified by silver or gold nanoparticles previously covered by biphenyl-4,4'-dithiol. 1 ml of nanoparticles was added drop-wise at intensive stirring to the 1 ml of biphenyl-4,4'-dithiol solution with concentration of 5 × 10-2 mol/l. The obtained mixture was purified by centrifugation. PTFE foil with gold layer was placed to the solution of nanoparticles for 12 h. After that the foil was removed from the solution, washed by pure methanol, and dried on the air.


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) Preparation of sandwich structures using modified nanoparticles. (b) Preparation of sandwich structures using modified gold layer.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 2: (a) Preparation of sandwich structures using modified nanoparticles. (b) Preparation of sandwich structures using modified gold layer.
Mentions: The sandwich structures were prepared by two procedures. In the first one (Figure 2a), the gold foils were modified by silver or gold nanoparticles previously covered by biphenyl-4,4'-dithiol. 1 ml of nanoparticles was added drop-wise at intensive stirring to the 1 ml of biphenyl-4,4'-dithiol solution with concentration of 5 × 10-2 mol/l. The obtained mixture was purified by centrifugation. PTFE foil with gold layer was placed to the solution of nanoparticles for 12 h. After that the foil was removed from the solution, washed by pure methanol, and dried on the air.

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