Temperature dependence of the surface plasmon resonance of Au/SiO2 nanocomposite films

2000 ◽  
Vol 77 (26) ◽  
pp. 4283-4285 ◽  
Author(s):  
Dan Dalacu ◽  
Ludvik Martinu
Keyword(s):  
Surface Plasmon Resonance ◽  
Temperature Dependence ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Nanocomposite Films

Surface Plasmon Resonance of Ag Nanoparticles Embedded in Partially Oxidized Amorphous Si Matrix

2008 ◽  
Vol 8 (8) ◽  
pp. 4285-4289 ◽  
Author(s):  
S. Mohapatra ◽  
Y. K. Mishra ◽  
J. Ghatak ◽  
D. Kabiraj ◽  
D. K. Avasthi
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Ag Nanoparticles ◽  
Rutherford Backscattering Spectrometry ◽  
Resonant Absorption ◽  
Red Shift ◽  
Nanocomposite Films ◽  
Tem Analysis ◽  
Amorphous Si

Nanocomposite films containing Ag nanoparticles embedded in partially oxidized amorphous Si matrix were deposited on silica glass substrates by co-sputtering of Ag and Si with 1.5 keV neutral Ar atoms. The Ag content and thickness of the nanocomposite films was determined by Rutherford backscattering spectrometry. Optical absorption studies revealed the presence of surface plasmon resonance (SPR) indicating the formation of Ag nanoparticles in the as-deposited films. The position, width and strength of SPR have been found to be strongly dependent on the Ag content of the films. For annealing in oxidizing atmosphere, a significant red shift in the SPR along with a drastic reduction in the resonant absorption has been observed. The amount of red shift has been found to be dependent on the Ag content of the films. Transmission electron microscopy was used to study the size distribution, shape and crystal structure of Ag nanoparticles in the nanocomposite films. TEM analysis of annealed sample revealed the formation of silver oxide nanoshells surrounding Ag nanoparticles.

Thermal Stability of Surface Plasmon Resonance Absorption in а-С:Н〈Ag + TiО2〉 Nanocomposite Films

2018 ◽  
Vol 125 (6) ◽  
pp. 864-869
Author(s):  
O. Yu. Prikhod’ko ◽  
S. L. Mikhailova ◽  
E. S. Mukhametkarimov ◽  
K. Dautkhan ◽  
S. Ya. Maksimova ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Resonance Absorption ◽  
Nanocomposite Films ◽  
Surface Plasmon Resonance Absorption ◽  
Thermal Stability Of

scholarly journals Temperature dependence of the surface plasmon resonance in gold nanoparticles

2013 ◽  
Vol 608 ◽  
pp. 275-281 ◽  
Author(s):  
O.A. Yeshchenko ◽  
I.S. Bondarchuk ◽  
V.S. Gurin ◽  
I.M. Dmitruk ◽  
A.V. Kotko
Keyword(s):  
Gold Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Temperature Dependence ◽  
Surface Plasmon ◽  
Plasmon Resonance

Anomalous dispersion in nanocomposite films at the surface plasmon resonance

2001 ◽  
Vol 73 (4) ◽  
pp. 339-343 ◽  
Author(s):  
R. Serna ◽  
J. Gonzalo ◽  
C.N. Afonso ◽  
J.C.G. de Sande
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Anomalous Dispersion ◽  
Nanocomposite Films

scholarly journals Surface Plasmon Resonance Responses of Au-SnOxNanocomposite Films

2009 ◽  
Vol 1208 ◽  
Author(s):  
Dongfang Yang
Keyword(s):  
Thin Films ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Incident Angle ◽  
Attenuated Total Reflection ◽  
Nanocomposite Films ◽  
Diffraction Field ◽  
X Ray ◽  
Nanocomposite Thin Films

AbstractAu-SnOxnanocomposite thin films composed of gold nanoparticles embedded in SnOxmatrix were prepared by pulsed laser deposition technique and their crystal structure, morphology and chemical composition were evaluated by low angle X-ray diffraction, field-emission scanning electron microscopy and x-ray photoelectron spectroscopy, respectively. For the nanocomposite films with high Au percentage, the surfaces of nanocomposite films are very smooth, while for the films with low Au percentage, the films consist of many embedded Au nanoparticles with particle size of 5-20 nm. The XRD results revealed that in the nanocomposite films Au existed in a polycrystalline phase while SnOxin an amorphous phase. Surface plasmon resonance (SPR) responses of the Au-SnOxnanocomposite thin films were investigated as functions of Au percentage and film thickness in the Kretschmann geometry of attenuated total reflection using a polarized light beam at the wavelength of 640 nm. The reflectance minima (SPR dip) of SPR responses of the Au-SnOxnanocomposite films appeared at higher values of incident angle than that of a pure Au film and as the Au percentage decreases the SPR angles shift to higher values and the widths also become broader. The potential use of Au-SnOxnanocomposite films for SPR gas sensing was discussed.

scholarly journals Au plasmonic effect on the Voc, Jsc and efficiency of the Au-embedded TiO2-based DSSC solar cell

2017 ◽  
Vol 27 (1) ◽  
Author(s):  
Pham Duy Long
Keyword(s):  
Gold Nanoparticles ◽  
Solar Cells ◽  
Surface Plasmon Resonance ◽  
Solar Cell ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Short Circuit ◽  
Nanocomposite Films ◽  
Tio2 Films ◽  
Plasmonic Effect

In this study the influence of the plasmonic effect of gold nanoparticles on the parameters (Voc, Jsc and efficiency) of Au-embedded TiO2-based DSSC solar cells was investigated. The gold nanoparticles were successfully embedded into the TiO2 films by means of vacuum evaporation combined with thermal annealing. A thin Au layer was deposited first on TiO2 film by the thermal evaporation then annealed at a temperature of 400 oC to get nanocomposite films. It was found that the Au nanoparticles were well dispersed on the TiO2 films and their average size changed from 14 nm to 35 nm when the deposited gold layer changed from 3 nm to 8 nm. The surface plasmon resonance (SPR) absorption spectrum of Au@TiO2 films was observed in the wavelength range from 534 nm to 614 nm, depending on the gold nanoparticles size. The Au@TiO2 thin films were used as photo-anode for manufacturing the DSSC solar cells in configuration of FTO/Au@TiO2/(I-/I2-) electrolyte/Pt. The I-V characteristics of the cells were measured under irradiation of the visible light. The results indicate that, the short-circuit current (Jsc) and open-circuit voltage (Voc) of the Au@TiO2 films based solar cell and its efficiency were much improved, due to a contribution of the surface plasmon resonance (SPR) effect

scholarly journals Thermo-Optical Effects in Plasmonic Metal Nanostructures

2021 ◽  
Vol 66 (2) ◽  
pp. 112
Author(s):  
O.A. Yeshchenko ◽  
A.O. Pinchuk
Keyword(s):  
Surface Plasmon Resonance ◽  
Temperature Dependence ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Laser Heating ◽  
Phonon Scattering ◽  
Red Shift ◽  
Au Nps ◽  
Scattering Rate ◽  
Electron Phonon Scattering

The effects of the temperature on the surface plasmon resonance (SPR) in noble metal nanoparticles at various temperatures ranging from 77 to 1190 K are reviewed. A temperature increase results in an appreciable red shift and leads to a broadening of the SPR in the nanoparticles (NPs). This observed thermal expansion along with an increase in the electron-phonon scattering rate with rising temperature emerge as the dominant physical mechanisms producing the red shift and broadening of the SPR. Strong temperature dependence of surface plasmon enhanced photoluminescence from silver (Ag) and copper (Cu) NPs is observed. The quantum photoluminescence yield of Ag nanoparticles decreases as the temperature increases, due to a decrease in the plasmon enhancement resulting from an increase in the electron-phonon scattering rate. An anomalous temperature dependence of the photoluminescence from Cu nanoparticles was also observed; the quantum yield of photoluminescence increases with the temperature. The interplay between the SPR and the interband transitions plays a critical role in this effect. The surface-plasmon involved laser heating of a dense 2D layer of gold (Au) NPs and of Au NPs in water colloids is also examined. A strong increase in the Au NP temperature occurs, when the laser frequency approaches the SPR. This finding supports the resonant plasmonic character of the laser heating of metal NPs. The sharp blue shift of the surface plasmon resonance in colloidal Au NPs at temperatures exceeding the water boiling point indicates the vapor-bubble formation near the surface of the NPs.

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