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Revealing the nanoparticles aspect ratio in the glass-metal nanocomposites irradiated with femtosecond laser.

Chervinskii S, Drevinskas R, Karpov DV, Beresna M, Lipovskii AA, Svirko YP, Kazansky PG - Sci Rep (2015)

Bottom Line: Comparing experimental absorption spectra with the modeling based on Maxwell Garnett approximation modified for spheroidal inclusions, we obtained the mean aspect ratio of the re-shaped silver nanoparticles as a function of the laser fluence.We demonstrated that under our experimental conditions the spherical shape of silver nanoparticles changed to a prolate spheroid with the aspect ratio as high as 3.5 at the laser fluence of 0.6 J/cm2.The developed approach can be employed to control the anisotropy of the glass-metal composites.

View Article: PubMed Central - PubMed

Affiliation: Institute of Photonics, University of Eastern Finland, P.O.Box 111 Joensuu, FI-80101 Finland.

ABSTRACT
We studied a femtosecond laser shaping of silver nanoparticles embedded in soda-lime glass. Comparing experimental absorption spectra with the modeling based on Maxwell Garnett approximation modified for spheroidal inclusions, we obtained the mean aspect ratio of the re-shaped silver nanoparticles as a function of the laser fluence. We demonstrated that under our experimental conditions the spherical shape of silver nanoparticles changed to a prolate spheroid with the aspect ratio as high as 3.5 at the laser fluence of 0.6 J/cm2. The developed approach can be employed to control the anisotropy of the glass-metal composites.

No MeSH data available.


Absorbance spectra of original GMN (dashed), and after laser irradiation with 0.5 J/cm2 fluence (solid) in s (red) in p (black) polarized light.Green line denotes the wavelength of the modifying laser.
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f2: Absorbance spectra of original GMN (dashed), and after laser irradiation with 0.5 J/cm2 fluence (solid) in s (red) in p (black) polarized light.Green line denotes the wavelength of the modifying laser.

Mentions: Optical characterization of the pristine and irradiated GMN regions was performed with UV-VIS-NIR microspectrometer system (Olympus BX51, CRAIC). The absorbance spectrum of the pristine GMN was measured using a non-polarized light (Fig. 2). The dichroism of the irradiated regions of the GMN was studied by measuring differential optical density , where and are the transmittances of light polarized along (s-polarization) and perpendicular (p-polarization) to the writing beam polarization, respectively (Fig. 2). We controlled the polarization of the probe light beam by inserting a linear polarizer before the sample.


Revealing the nanoparticles aspect ratio in the glass-metal nanocomposites irradiated with femtosecond laser.

Chervinskii S, Drevinskas R, Karpov DV, Beresna M, Lipovskii AA, Svirko YP, Kazansky PG - Sci Rep (2015)

Absorbance spectra of original GMN (dashed), and after laser irradiation with 0.5 J/cm2 fluence (solid) in s (red) in p (black) polarized light.Green line denotes the wavelength of the modifying laser.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4562248&req=5

f2: Absorbance spectra of original GMN (dashed), and after laser irradiation with 0.5 J/cm2 fluence (solid) in s (red) in p (black) polarized light.Green line denotes the wavelength of the modifying laser.
Mentions: Optical characterization of the pristine and irradiated GMN regions was performed with UV-VIS-NIR microspectrometer system (Olympus BX51, CRAIC). The absorbance spectrum of the pristine GMN was measured using a non-polarized light (Fig. 2). The dichroism of the irradiated regions of the GMN was studied by measuring differential optical density , where and are the transmittances of light polarized along (s-polarization) and perpendicular (p-polarization) to the writing beam polarization, respectively (Fig. 2). We controlled the polarization of the probe light beam by inserting a linear polarizer before the sample.

Bottom Line: Comparing experimental absorption spectra with the modeling based on Maxwell Garnett approximation modified for spheroidal inclusions, we obtained the mean aspect ratio of the re-shaped silver nanoparticles as a function of the laser fluence.We demonstrated that under our experimental conditions the spherical shape of silver nanoparticles changed to a prolate spheroid with the aspect ratio as high as 3.5 at the laser fluence of 0.6 J/cm2.The developed approach can be employed to control the anisotropy of the glass-metal composites.

View Article: PubMed Central - PubMed

Affiliation: Institute of Photonics, University of Eastern Finland, P.O.Box 111 Joensuu, FI-80101 Finland.

ABSTRACT
We studied a femtosecond laser shaping of silver nanoparticles embedded in soda-lime glass. Comparing experimental absorption spectra with the modeling based on Maxwell Garnett approximation modified for spheroidal inclusions, we obtained the mean aspect ratio of the re-shaped silver nanoparticles as a function of the laser fluence. We demonstrated that under our experimental conditions the spherical shape of silver nanoparticles changed to a prolate spheroid with the aspect ratio as high as 3.5 at the laser fluence of 0.6 J/cm2. The developed approach can be employed to control the anisotropy of the glass-metal composites.

No MeSH data available.