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Surface-plasmon resonance sensing of alcohol with electrodeposited polythiophene and gold nanoparticle-oligothiophene films
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10.1063/1.2138373
/content/aip/journal/jap/98/11/10.1063/1.2138373
http://aip.metastore.ingenta.com/content/aip/journal/jap/98/11/10.1063/1.2138373

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic diagram of the electrodeposited Au NP network. (b) Kretschmann-type configuration to measure SPR.

Image of FIG. 2.
FIG. 2.

SPR plots of reflected intensity as a function of the angle of incidence for (a) a 50-nm-thick gold film and a 7-nm-thick PT film on a gold film in air . PT on a gold film before and after exposure to (b) methanol, (c) ethanol, and (d) toluene. Solid line is the theoretical fit obtained from Fresnel’s equations with variable film thickness and dielectric constant, using a least-squares algorithm.

Image of FIG. 3.
FIG. 3.

SPR plots of reflected intensity as a function of the angle of incidence for a 50-nm-thick gold film , a NPOT film on a gold film in air , and NPOT film on a gold film after exposure to selected vapors , (a) methanol and (b) ethanol. Solid line is the theoretical fit obtained from Fresnel’s equations with variable film thickness and dielectric constant, using a least-squares algorithm.

Tables

Generic image for table
Table I.

SPR minimum , thickness , differential reflectivity , and real and imaginary (img) parts of the dielectric constant for the fourth layer from fitting using Fresnel’s equations before and after exposure to organic vapors.

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/content/aip/journal/jap/98/11/10.1063/1.2138373
2005-12-13
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Surface-plasmon resonance sensing of alcohol with electrodeposited polythiophene and gold nanoparticle-oligothiophene films
http://aip.metastore.ingenta.com/content/aip/journal/jap/98/11/10.1063/1.2138373
10.1063/1.2138373
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