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Related Concept Videos

Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Emission Spectra02:39

Emission Spectra

When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
Carrier Generation and Recombination01:22

Carrier Generation and Recombination

Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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...

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Updated: May 30, 2026

Automating Aggregate Quantification in Caenorhabditis elegans
07:50

Automating Aggregate Quantification in Caenorhabditis elegans

Published on: October 14, 2021

Aggregation-induced emission.

Yuning Hong1, Jacky W Y Lam, Ben Zhong Tang

  • 1Department of Chemistry, Nano Science and Technology Program, Bioengineering Graduate Program, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China.

Chemical Society Reviews
|July 30, 2011
PubMed
Summary
This summary is machine-generated.

Aggregation-induced emission (AIE) materials show unique light emission when aggregated. This review summarizes recent AIE research, exploring structure-property links and applications in optoelectronics and biology.

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Area of Science:

  • Materials Science
  • Photochemistry
  • Organic Chemistry

Background:

  • Aggregation-induced emission (AIE) materials have garnered significant attention since 2001.
  • AIE materials exhibit enhanced luminescence upon aggregation, a unique phenomenon in photophysics.

Purpose of the Study:

  • To critically review recent advancements in AIE research.
  • To elucidate structure-property relationships and design strategies for novel AIE luminogens.
  • To highlight technological applications of AIE systems.

Main Methods:

  • Literature review of recent AIE research.
  • Analysis of typical AIE systems and their photophysical properties.
  • Mechanistic investigation of AIE phenomena.

Main Results:

  • Summarized recent progress in AIE materials development.
  • Established structure-property correlations for AIE luminogens.
  • Identified design strategies for new AIE materials.

Conclusions:

  • AIE materials offer significant potential for high-tech innovations.
  • Understanding photophysical mechanisms is key to designing advanced AIE luminogens.
  • Optoelectronic and biological applications demonstrate the utility of the AIE effect.