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Photoluminescence: Applications

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...

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Related Experiment Video

Updated: Jun 10, 2026

Observation and Analysis of Blinking Surface-enhanced Raman Scattering

Observation and Analysis of Blinking Surface-enhanced Raman Scattering

Published on: January 11, 2018

Luminescent Blinking from Silver Nanostructures.

Chris D Geddes¹, Alex Parfenov, Ignacy Gryczynski

¹Institute of Fluorescence and the Center for Fluorescence Spectroscopy, Medical Biotechnology Center, University of Maryland Biotechnology Institute, 725 West Lombard Street, Baltimore, Maryland 21201, and Center for Fluorescence Spectroscopy, Department of Biochemistry and Molecular Biology, University of Maryland at Baltimore, 725 West Lombard Street, Baltimore, Maryland 21201.

The Journal of Physical Chemistry. B

|August 21, 2010

Summary

This summary is machine-generated.

Silver nanostructures exhibit luminescent blinking, with fractal-like silver structures being highly emissive. These properties suggest new applications for silver in luminescence probes and labels.

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Last Updated: Jun 10, 2026

Observation and Analysis of Blinking Surface-enhanced Raman Scattering

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Published on: January 11, 2018

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A Method to Fabricate Disconnected Silver Nanostructures in 3D

A Method to Fabricate Disconnected Silver Nanostructures in 3D

Published on: November 27, 2012

Area of Science:

Nanotechnology
Materials Science
Optics

Background:

Silver nanostructures on glass display luminescent blinking under specific excitation conditions.
The photoactivation irradiance for silver nanostructures varies based on their morphology.

Purpose of the Study:

To investigate the luminescent blinking properties of different silver nanostructures.
To understand the role of silver nanostructures in metal-enhanced fluorescence.
To explore potential applications of silver's intrinsic luminescence.

Main Methods:

Excitation of silver nanostructures on glass using 442 nm irradiance.
Characterization of luminescent emission and photoactivation thresholds.
Comparison of silver nanostructures with gold colloids and their effect on fluorescence.

Main Results:

Fractal-like silver structures are highly emissive, requiring lower irradiance (≈30 W/cm²) for photoactivation compared to island films and colloids (>100 W/cm²).
Observed foci with different color blinking and increasing luminescence intensity over time.
Metal-enhanced fluorescence effects occur at lower illumination intensities than silver photoactivation.

Conclusions:

Enhanced fluorescence near silver nanostructures is not due to silver blinking or luminescence pumping.
Intrinsic luminescence of silver suggests potential as novel luminescence probes and labels.
Silver nanostructures offer unique optical properties for advanced applications.