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Cold controlled chemistry.

R V Krems1

  • 1Department of Chemistry, University of British Columbia, Vancouver, B.C., CanadaV6T 1Z1. rkrems@chem.ubc.ca

Physical Chemistry Chemical Physics : PCCP
|July 10, 2008
PubMed
Summary
This summary is machine-generated.

Controlling molecular collisions at low temperatures (below 1 K) is possible using external electromagnetic fields. This opens new avenues for cold controlled chemistry and its applications.

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Area of Science:

  • Chemical Physics
  • Molecular Dynamics
  • Quantum Chemistry

Background:

  • Thermal motion in gases hinders control over molecular collisions.
  • External fields have limited influence on high-energy thermal molecular encounters.
  • Cooling molecular gases reduces thermal motion, enhancing field effects.

Purpose of the Study:

  • To demonstrate manipulation of molecular collisions using electromagnetic fields at sub-Kelvin temperatures.
  • To explore applications of cold controlled chemistry.
  • To review molecular interactions in cold (0.001-2 K) and ultracold (<0.001 K) regimes.

Main Methods:

  • Theoretical analysis of molecular interactions at low temperatures.
  • Experimental investigations of cold and ultracold molecular gases.
  • Focus on the influence of external electromagnetic fields.

Main Results:

  • Molecular collisions at temperatures below 1 K can be effectively manipulated by external electromagnetic fields.
  • Inelastic scattering and chemical reactions are efficient in cold molecular gases.
  • External fields become dominant over collision energy at low temperatures.

Conclusions:

  • Cold controlled chemistry offers significant potential for future applications.
  • Challenges remain in both theoretical and experimental research of cold molecules.
  • Further research is needed to fully understand and utilize cold molecular interactions.