Optical properties of thermally responsive amphiphilic gold nanoparticles protected with polymers

J. Shan, J. Chen, M. Nuopponen, T. Viitala, Hua Jiang, J. Peltonen, Esko I. Kauppinen, H. Tenhu (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

70 Citations (Scopus)

Abstract

Amphiphilic thermally responsive gold nanoparticles have been prepared by protecting the particles with both polystyrene, PS, and poly(N-isopropylacrylamide), PNIPAM, chains. Particles form a monolayer on a water surface in a Langmuir trough, and according to in situ spectroscopic measurements, the surface plasmon resonance, SPR, band undergoes a blue-shift during the monolayer compression. The compression-induced blue-shift is related to a change in the conformation of tethered PNIPAM chains; the phenomenon is discussed on the basis of Mie−Drude theory. In contrast, a red-shift in the SPR of the multilayers of the same nanoparticles transferred at different temperatures has been observed with increasing the deposition cycle, attributed to the presence of a weak interparticle coupling in the multilayer.
Original languageEnglish
Pages (from-to)794-801
Number of pages8
JournalLangmuir
Volume22
Issue number2
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

Fingerprint

blue shift
Gold
Monolayers
Polymers
Multilayers
Optical properties
gold
Nanoparticles
optical properties
nanoparticles
polymers
Surface plasmon resonance
surface water
troughs
surface plasmon resonance
red shift
Conformations
Polystyrenes
polystyrene
cycles

Keywords

  • nanoparticles
  • gold
  • gold nanoparticles
  • surface plasmon resonance
  • monolayers
  • Langmuir-Blodgett films
  • optical properties

Cite this

Shan, J., Chen, J., Nuopponen, M., Viitala, T., Jiang, H., Peltonen, J., ... Tenhu, H. (2006). Optical properties of thermally responsive amphiphilic gold nanoparticles protected with polymers. Langmuir, 22(2), 794-801. https://doi.org/10.1021/la052579q
Shan, J. ; Chen, J. ; Nuopponen, M. ; Viitala, T. ; Jiang, Hua ; Peltonen, J. ; Kauppinen, Esko I. ; Tenhu, H. / Optical properties of thermally responsive amphiphilic gold nanoparticles protected with polymers. In: Langmuir. 2006 ; Vol. 22, No. 2. pp. 794-801.
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Shan, J, Chen, J, Nuopponen, M, Viitala, T, Jiang, H, Peltonen, J, Kauppinen, EI & Tenhu, H 2006, 'Optical properties of thermally responsive amphiphilic gold nanoparticles protected with polymers', Langmuir, vol. 22, no. 2, pp. 794-801. https://doi.org/10.1021/la052579q

Optical properties of thermally responsive amphiphilic gold nanoparticles protected with polymers. / Shan, J.; Chen, J.; Nuopponen, M.; Viitala, T.; Jiang, Hua; Peltonen, J.; Kauppinen, Esko I.; Tenhu, H. (Corresponding Author).

In: Langmuir, Vol. 22, No. 2, 2006, p. 794-801.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Optical properties of thermally responsive amphiphilic gold nanoparticles protected with polymers

AU - Shan, J.

AU - Chen, J.

AU - Nuopponen, M.

AU - Viitala, T.

AU - Jiang, Hua

AU - Peltonen, J.

AU - Kauppinen, Esko I.

AU - Tenhu, H.

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AB - Amphiphilic thermally responsive gold nanoparticles have been prepared by protecting the particles with both polystyrene, PS, and poly(N-isopropylacrylamide), PNIPAM, chains. Particles form a monolayer on a water surface in a Langmuir trough, and according to in situ spectroscopic measurements, the surface plasmon resonance, SPR, band undergoes a blue-shift during the monolayer compression. The compression-induced blue-shift is related to a change in the conformation of tethered PNIPAM chains; the phenomenon is discussed on the basis of Mie−Drude theory. In contrast, a red-shift in the SPR of the multilayers of the same nanoparticles transferred at different temperatures has been observed with increasing the deposition cycle, attributed to the presence of a weak interparticle coupling in the multilayer.

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KW - gold nanoparticles

KW - surface plasmon resonance

KW - monolayers

KW - Langmuir-Blodgett films

KW - optical properties

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