Optical absorption of composite systems with silver nanoparticles dispersed in arabinogalactan and arabinogalactan-g-polypyrrole block copolymer matrices

In this research we study optical absorption and morphology of silver films prepared with a sputtering method. Silver granular films are obtained on a glass substrate for films with thickness smaller than about 60 Å. Superficial silver clusters of around 100 nm in diameter are clearly seen in the atomic force micrographs. The absorption of these samples are characterized by plasmon excitation in the 450-650 nm spectral range, which differs from the known excitation of silver nanoparticles fabricated by different techniques. The optical absorption of silver granular films depend on sputtering conditions like substrate temperature or deposition rate and correlates with the surface morphology.

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Sedimentation field flow fractionation and optical absorption spectroscopy for a quantitative size characterization of silver nanoparticles

Journal of Chromatography A ◽

10.1016/j.chroma.2016.10.026 ◽

2016 ◽

Vol 1471 ◽

pp. 178-185 ◽

Cited By ~ 6

Author(s):

Catia Contado ◽

Roberto Argazzi ◽

Vincenzo Amendola

Keyword(s):

Silver Nanoparticles ◽

Optical Absorption ◽

Absorption Spectroscopy ◽

Optical Absorption Spectroscopy ◽

Field Flow Fractionation ◽

Size Characterization ◽

Flow Fractionation ◽

Sedimentation Field Flow Fractionation

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Dye-Sensitized Solar Cells Using Localized Surface Plasmon of Gold and Silver Nanoparticles with Comb-shaped Block Copolymer

ECS Transactions ◽

10.1149/1.3416200 ◽

2019 ◽

Vol 25 (42) ◽

pp. 37-48 ◽

Cited By ~ 4

Author(s):

Mikio Enomoto ◽

Katsuhiko Taniguchi ◽

Manabu Ihara

Keyword(s):

Silver Nanoparticles ◽

Solar Cells ◽

Block Copolymer ◽

Surface Plasmon ◽

Dye Sensitized Solar Cells ◽

Localized Surface Plasmon ◽

Gold And Silver Nanoparticles ◽

Dye Sensitized ◽

Sensitized Solar Cells

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Antibacterial property of silver nanoparticles with block copolymer shells

Medicine Sciences and Bioengineering ◽

10.1201/b18418-98 ◽

2015 ◽

pp. 543-546

Keyword(s):

Silver Nanoparticles ◽

Block Copolymer ◽

Antibacterial Property

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Nonlinear optical absorption of non-spherical silver nanoparticles and organic dyes mixtures

EPJ Web of Conferences ◽

10.1051/epjconf/201819004016 ◽

2018 ◽

Vol 190 ◽

pp. 04016

Author(s):

Andrey I. Zvyagin ◽

Aleksey S. Perepelitsa ◽

Mariya S. Lavlinskaya ◽

Oleg V. Ovchinnikov ◽

Mikhail S. Smirnov ◽

...

Keyword(s):

Silver Nanoparticles ◽

Optical Absorption ◽

Nonlinear Optical ◽

Optical Response ◽

Nonlinear Optical Response ◽

Saturable Absorption ◽

Reverse Saturable Absorption ◽

Photochemical Degradation ◽

Ag Nps ◽

Nonlinear Optical Absorption

We study the features of the nonlinear optical response of silver nanoparticles (Ag NPs) of spherical and triangular shapes synthesized using a citrate-borohydride approach and their mixtures with methylene blue (MB+). The Z-scans at the wavelengths of 532 nm using 10 ns pulses were used to analyze the nonlinear optical absorption of MB+ solutions, Ag NPs of different morphology, particularly, the concurrence of saturable and reverse saturable absorption in the solution of triangular Ag NP and MB+. We show the significant contribution to the increasing in the normalized transmittance accomplished by photochemical degradation of the non-spherical Ag NPs (extinction maximum of 600 nm) and transformation into the spherical ones (extinction maximum of 400 nm). The nonlinear light scattering is also analyzed, which showed the contribution to the variation of the sample transmission when it approaches the focal plane. It is shown that the nonlinear optical response is not additive in the mixture of Ag NPs and MB+. The increasing of the nonlinear absorption is probably due to both a change in the population of the triplet states of the dye and the efficiency of photochemical degradation of NPs in the presence of MB+.

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