Selective excitation of tryptophan fluorescence decay in proteins using a sub-nanosecond 295 nm light-emitting diode and time-correlated single-photon counting

C.D. McGuiness, K. Sagoo, D. McLoskey, D.J.S. Birch

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

We demonstrate an AlGaN light-emitting diode (LED) giving pulses of ~600 ps full width half maximum, 0.35 W average power, 0.6 mW peak power, and ~12 nm bandwidth at 295 nm. This source is ideal for protein intrinsic tryptophan fluorescence decay research without the unwanted excitation of tyrosine and paves the way to lab-on-a-chip protein assays using fluorescence decay times. Fluorescence decay and anisotropy decay measurements of human serum albumin are reported and the usefulness of the 295 nm LED demonstrated in comparisons with a nanosecond flashlamp and LEDs with nominal wavelength emission of 280 nm.
Original languageEnglish
Pages (from-to)261911-261911
Number of pages0
JournalApplied Physics Letters
Volume86
DOIs
Publication statusPublished - 24 Jun 2005

Fingerprint

tryptophan
counting
light emitting diodes
proteins
fluorescence
photons
decay
excitation
tyrosine
albumins
serums
chips
bandwidth
anisotropy
pulses
wavelengths

Keywords

  • selective excitation
  • tryptophan fluorescence decay
  • proteins
  • light-emitting diode
  • time-correlated single-photon counting
  • nanoscience

Cite this

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abstract = "We demonstrate an AlGaN light-emitting diode (LED) giving pulses of ~600 ps full width half maximum, 0.35 W average power, 0.6 mW peak power, and ~12 nm bandwidth at 295 nm. This source is ideal for protein intrinsic tryptophan fluorescence decay research without the unwanted excitation of tyrosine and paves the way to lab-on-a-chip protein assays using fluorescence decay times. Fluorescence decay and anisotropy decay measurements of human serum albumin are reported and the usefulness of the 295 nm LED demonstrated in comparisons with a nanosecond flashlamp and LEDs with nominal wavelength emission of 280 nm.",
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Selective excitation of tryptophan fluorescence decay in proteins using a sub-nanosecond 295 nm light-emitting diode and time-correlated single-photon counting. / McGuiness, C.D.; Sagoo, K.; McLoskey, D.; Birch, D.J.S.

In: Applied Physics Letters, Vol. 86, 24.06.2005, p. 261911-261911.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Selective excitation of tryptophan fluorescence decay in proteins using a sub-nanosecond 295 nm light-emitting diode and time-correlated single-photon counting

AU - McGuiness, C.D.

AU - Sagoo, K.

AU - McLoskey, D.

AU - Birch, D.J.S.

PY - 2005/6/24

Y1 - 2005/6/24

N2 - We demonstrate an AlGaN light-emitting diode (LED) giving pulses of ~600 ps full width half maximum, 0.35 W average power, 0.6 mW peak power, and ~12 nm bandwidth at 295 nm. This source is ideal for protein intrinsic tryptophan fluorescence decay research without the unwanted excitation of tyrosine and paves the way to lab-on-a-chip protein assays using fluorescence decay times. Fluorescence decay and anisotropy decay measurements of human serum albumin are reported and the usefulness of the 295 nm LED demonstrated in comparisons with a nanosecond flashlamp and LEDs with nominal wavelength emission of 280 nm.

AB - We demonstrate an AlGaN light-emitting diode (LED) giving pulses of ~600 ps full width half maximum, 0.35 W average power, 0.6 mW peak power, and ~12 nm bandwidth at 295 nm. This source is ideal for protein intrinsic tryptophan fluorescence decay research without the unwanted excitation of tyrosine and paves the way to lab-on-a-chip protein assays using fluorescence decay times. Fluorescence decay and anisotropy decay measurements of human serum albumin are reported and the usefulness of the 295 nm LED demonstrated in comparisons with a nanosecond flashlamp and LEDs with nominal wavelength emission of 280 nm.

KW - selective excitation

KW - tryptophan fluorescence decay

KW - proteins

KW - light-emitting diode

KW - time-correlated single-photon counting

KW - nanoscience

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VL - 86

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EP - 261911

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SN - 0003-6951

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