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Random nanostructured metallic films for environmental monitoring and optical sensing: experimental and computational studies.

Karbovnyk I, Collins J, Bolesta I, Stelmashchuk A, Kolkevych A, Velupillai S, Klym H, Fedyshyn O, Tymoshuk S, Kolych I - Nanoscale Res Lett (2015)

Bottom Line: Surface plasmon resonance-related phenomena are emphasized.Resonant optical absorption band changes due to the influence of noxious gases are investigated.Amplification of light at the film surface due to local electromagnetic field enhancement at the nanoscale is discussed based on finite difference time domain calculations.

View Article: PubMed Central - PubMed

Affiliation: Ivan Franko National University of Lviv, 1 Universytetska str, Lviv, 79000 Ukraine.

ABSTRACT
Nanostructured silver films are studied using computational and experimental methods. Surface plasmon resonance-related phenomena are emphasized. Resonant optical absorption band changes due to the influence of noxious gases are investigated. Amplification of light at the film surface due to local electromagnetic field enhancement at the nanoscale is discussed based on finite difference time domain calculations.

No MeSH data available.


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Influence of nitrogen dioxide (bottom graph) and carbon dioxide environment on the optical absorption of silver films.
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Fig5: Influence of nitrogen dioxide (bottom graph) and carbon dioxide environment on the optical absorption of silver films.

Mentions: Measurements of the optical absorption of films in different environments confirmed that the presence of gas molecules affects the absorption spectra. The results are presented in FigureĀ 5. It was established that exposing the sample to CO2 leads to a slight blue shift of the absorption peak, band broadening, and a decrease in the maximum absorption level. The longer is the exposure time, the lower is the absorption at the peak position. The shift depends on the morphology on the film and is larger for the thicker films (or films with larger silver clusters). The effect of NO2 is considerably stronger in the sense that resonant absorption completely disappears.Figure 5


Random nanostructured metallic films for environmental monitoring and optical sensing: experimental and computational studies.

Karbovnyk I, Collins J, Bolesta I, Stelmashchuk A, Kolkevych A, Velupillai S, Klym H, Fedyshyn O, Tymoshuk S, Kolych I - Nanoscale Res Lett (2015)

Influence of nitrogen dioxide (bottom graph) and carbon dioxide environment on the optical absorption of silver films.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385309&req=5

Fig5: Influence of nitrogen dioxide (bottom graph) and carbon dioxide environment on the optical absorption of silver films.
Mentions: Measurements of the optical absorption of films in different environments confirmed that the presence of gas molecules affects the absorption spectra. The results are presented in FigureĀ 5. It was established that exposing the sample to CO2 leads to a slight blue shift of the absorption peak, band broadening, and a decrease in the maximum absorption level. The longer is the exposure time, the lower is the absorption at the peak position. The shift depends on the morphology on the film and is larger for the thicker films (or films with larger silver clusters). The effect of NO2 is considerably stronger in the sense that resonant absorption completely disappears.Figure 5

Bottom Line: Surface plasmon resonance-related phenomena are emphasized.Resonant optical absorption band changes due to the influence of noxious gases are investigated.Amplification of light at the film surface due to local electromagnetic field enhancement at the nanoscale is discussed based on finite difference time domain calculations.

View Article: PubMed Central - PubMed

Affiliation: Ivan Franko National University of Lviv, 1 Universytetska str, Lviv, 79000 Ukraine.

ABSTRACT
Nanostructured silver films are studied using computational and experimental methods. Surface plasmon resonance-related phenomena are emphasized. Resonant optical absorption band changes due to the influence of noxious gases are investigated. Amplification of light at the film surface due to local electromagnetic field enhancement at the nanoscale is discussed based on finite difference time domain calculations.

No MeSH data available.


Related in: MedlinePlus