Nanoparticle metrology in sol-gels using multiphoton excited fluorescence

J. Karolin, C.D. Geddes, Klaas Wynne, D.J.S. Birch

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We have developed a method of measuring the growth of nanoparticles during sol-gel glass formation based on labelling the particle with a fluorescent dye and determining the multiphoton excited decay of fluorescence anisotropy due to Brownian rotation. Multiphoton excitation is shown to give a higher dynamic range of measurement than one-photon excitation. We illustrate the sub-nanometre resolution and stability of our approach by detecting a 0.8-1.1 nm silica particle hydrodynamic mean radius increase in a tetramethylorthosilicate sol at pH 2.3 labelled with rhodamine 6G and observed over ≈4 weeks and also with a stable silica colloid of radius 6 nm, pH 8.9, labelled with a 6-methoxyquinoline-type dye.
LanguageEnglish
Pages21-27
Number of pages6
JournalMeasurement Science and Technology
Volume13
Issue number1
DOIs
Publication statusPublished - 23 Nov 2001

Fingerprint

Sol-gel
Dyes
Metrology
Silica
Fluorescence
metrology
Particles (particulate matter)
Sol-gels
Nanoparticles
Excitation
dyes
Radius
gels
silicon dioxide
fluorescence
nanoparticles
High Dynamic Range
radii
Colloids
Sols

Keywords

  • particle metrology
  • fluorescence anisotropy decay
  • multiphoton excitation
  • sol-gel
  • TMOS
  • nanoscience

Cite this

Karolin, J. ; Geddes, C.D. ; Wynne, Klaas ; Birch, D.J.S. / Nanoparticle metrology in sol-gels using multiphoton excited fluorescence. In: Measurement Science and Technology. 2001 ; Vol. 13, No. 1. pp. 21-27.
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Nanoparticle metrology in sol-gels using multiphoton excited fluorescence. / Karolin, J.; Geddes, C.D.; Wynne, Klaas; Birch, D.J.S.

In: Measurement Science and Technology, Vol. 13, No. 1, 23.11.2001, p. 21-27.

Research output: Contribution to journalArticle

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T1 - Nanoparticle metrology in sol-gels using multiphoton excited fluorescence

AU - Karolin, J.

AU - Geddes, C.D.

AU - Wynne, Klaas

AU - Birch, D.J.S.

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AB - We have developed a method of measuring the growth of nanoparticles during sol-gel glass formation based on labelling the particle with a fluorescent dye and determining the multiphoton excited decay of fluorescence anisotropy due to Brownian rotation. Multiphoton excitation is shown to give a higher dynamic range of measurement than one-photon excitation. We illustrate the sub-nanometre resolution and stability of our approach by detecting a 0.8-1.1 nm silica particle hydrodynamic mean radius increase in a tetramethylorthosilicate sol at pH 2.3 labelled with rhodamine 6G and observed over ≈4 weeks and also with a stable silica colloid of radius 6 nm, pH 8.9, labelled with a 6-methoxyquinoline-type dye.

KW - particle metrology

KW - fluorescence anisotropy decay

KW - multiphoton excitation

KW - sol-gel

KW - TMOS

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