Linear dichroism and optical anisotropy of silver nanoprisms in polymer films

S. Requena, H. Doan, Sangram Limbaji Raut, A. D'Achille, Zygmunt Gryczynski, Ignacy Gryczynski, Y. M. Strzhemechny

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Abstract

We present optical studies of two different size distributions of silver triangular nanoprisms, one with a dipole resonance at 520 nm and the other with a dipole resonance at 650 nm, placed in different media. Significant wavelength-dependent depolarization of scattered light from the silver nanoprisms suspended in water indicates strong interference of multiple surface plasmon resonant modes in the same particle. We use this depolarization as a probe of light scattering by the nanoprisms in a lipid solution due to the rejection of a polarized background scattering. Also, the silver nanoprisms were embedded in a polyvinyl alcohol polymer matrix and oriented by stretching the polymer/nanoprism nanocomposite films. We observe significantly increased linear dichroism in the region associated with the plasmonic in-plane dipole mode upon stretching. Additionally, there is a weaker linear dichroism in the region associated with out-of-plane modes, which vanish in the extinction spectrum of the stretched nanocomposite film.

Original languageEnglish
Article number325704
JournalNanotechnology
Volume27
Issue number32
DOIs
StatePublished - 27 Jun 2016

Fingerprint

Optical anisotropy
Dichroism
Silver
Polymer films
Nanocomposite films
Depolarization
Stretching
Polyvinyl Alcohol
Polyvinyl alcohols
Polymer matrix
Light scattering
Lipids
Scattering
Wavelength
Water

Keywords

  • PVA
  • anisotropy
  • nanocomposites
  • optical properties
  • plasmonics
  • silver nanoprisms

Cite this

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title = "Linear dichroism and optical anisotropy of silver nanoprisms in polymer films",
abstract = "We present optical studies of two different size distributions of silver triangular nanoprisms, one with a dipole resonance at 520 nm and the other with a dipole resonance at 650 nm, placed in different media. Significant wavelength-dependent depolarization of scattered light from the silver nanoprisms suspended in water indicates strong interference of multiple surface plasmon resonant modes in the same particle. We use this depolarization as a probe of light scattering by the nanoprisms in a lipid solution due to the rejection of a polarized background scattering. Also, the silver nanoprisms were embedded in a polyvinyl alcohol polymer matrix and oriented by stretching the polymer/nanoprism nanocomposite films. We observe significantly increased linear dichroism in the region associated with the plasmonic in-plane dipole mode upon stretching. Additionally, there is a weaker linear dichroism in the region associated with out-of-plane modes, which vanish in the extinction spectrum of the stretched nanocomposite film.",
keywords = "PVA, anisotropy, nanocomposites, optical properties, plasmonics, silver nanoprisms",
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Linear dichroism and optical anisotropy of silver nanoprisms in polymer films. / Requena, S.; Doan, H.; Raut, Sangram Limbaji; D'Achille, A.; Gryczynski, Zygmunt; Gryczynski, Ignacy; Strzhemechny, Y. M.

In: Nanotechnology, Vol. 27, No. 32, 325704, 27.06.2016.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Linear dichroism and optical anisotropy of silver nanoprisms in polymer films

AU - Requena, S.

AU - Doan, H.

AU - Raut, Sangram Limbaji

AU - D'Achille, A.

AU - Gryczynski, Zygmunt

AU - Gryczynski, Ignacy

AU - Strzhemechny, Y. M.

PY - 2016/6/27

Y1 - 2016/6/27

N2 - We present optical studies of two different size distributions of silver triangular nanoprisms, one with a dipole resonance at 520 nm and the other with a dipole resonance at 650 nm, placed in different media. Significant wavelength-dependent depolarization of scattered light from the silver nanoprisms suspended in water indicates strong interference of multiple surface plasmon resonant modes in the same particle. We use this depolarization as a probe of light scattering by the nanoprisms in a lipid solution due to the rejection of a polarized background scattering. Also, the silver nanoprisms were embedded in a polyvinyl alcohol polymer matrix and oriented by stretching the polymer/nanoprism nanocomposite films. We observe significantly increased linear dichroism in the region associated with the plasmonic in-plane dipole mode upon stretching. Additionally, there is a weaker linear dichroism in the region associated with out-of-plane modes, which vanish in the extinction spectrum of the stretched nanocomposite film.

AB - We present optical studies of two different size distributions of silver triangular nanoprisms, one with a dipole resonance at 520 nm and the other with a dipole resonance at 650 nm, placed in different media. Significant wavelength-dependent depolarization of scattered light from the silver nanoprisms suspended in water indicates strong interference of multiple surface plasmon resonant modes in the same particle. We use this depolarization as a probe of light scattering by the nanoprisms in a lipid solution due to the rejection of a polarized background scattering. Also, the silver nanoprisms were embedded in a polyvinyl alcohol polymer matrix and oriented by stretching the polymer/nanoprism nanocomposite films. We observe significantly increased linear dichroism in the region associated with the plasmonic in-plane dipole mode upon stretching. Additionally, there is a weaker linear dichroism in the region associated with out-of-plane modes, which vanish in the extinction spectrum of the stretched nanocomposite film.

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