Related Experiment Video
Updated: Mar 23, 2026
07:03
Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
11.2K
Lanthanide-based laser-induced phosphorescence for spray diagnostics
D D van der Voort1, N C J Maes2, T Lamberts3
1Applied Physics Department, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands.
The Review of Scientific Instruments
|April 3, 2016
Summary
Laser-induced phosphorescence (LIP) using europium complexes visualizes liquid-phase spray dynamics. This technique effectively studies spray breakup and evaporation, even with diesel surrogates.
Area of Science:
- Fluid Dynamics
- Spectroscopy
- Materials Science
Background:
- Laser-induced phosphorescence (LIP) is an emerging technique for flow dynamics.
- Lanthanide complexes offer long phosphorescence lifetimes and visible light emission.
Purpose of the Study:
- Investigate lanthanide-based molecular complexes for LIP in high-speed sprays.
- Evaluate europium-thenoyltrifluoracetone-trioctylphosphineoxide (Eu-TTA-TOPO) for spray diagnostics.
Main Methods:
- Utilized fluorescence/phosphorescence spectrometry to analyze europium and terbium complexes.
- Employed a frequency-tripled Nd:YAG laser for excitation of Eu-TTA-TOPO.
- Measured spectral emission, temperature dependence, and phosphorescence decay constants.
Main Results:
- Eu-TTA-TOPO efficiently excited, emitting at 614 nm with minimal temperature variation (293-383 K).
- Phosphorescence decay constant decreased with temperature (12 μs/K, 323-373 K) and varied with solvent.
- Luminescence observed only in the liquid phase, enabling visualization of evaporating sprays.
Conclusions:
- LIP with Eu-TTA-TOPO is suitable for studying liquid-phase spray dynamics, including breakup and evaporation.
- The technique is versatile, applicable with various solvents like diesel surrogates.
- Eu-TTA-TOPO is easily handled and effective for spray diagnostics.
More Related Videos
08:48Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
Published on: November 9, 2015
8.7K
10:17Laser-induced Breakdown Spectroscopy: A New Approach for Nanoparticle's Mapping and Quantification in Organ Tissue
Published on: June 18, 2014
14.3K
Related Concept Videos
01:14Photoluminescence: Applications
1.2K
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...
1.2K
01:25Fluorescence and Phosphorescence: Instrumentation
1.8K
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
1.8K
01:29Atomic Emission Spectroscopy: Lab
779
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
779
01:19Gas Chromatography: Types of Detectors-II
1.4K
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
1.4K
01:23Photoluminescence: Fluorescence and Phosphorescence
4.5K
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...
A pair of electrons in a...
4.5K
01:02Flame Photometry: Overview
1.8K
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
1.8K