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Title: Sympathetic Cooling of Complex Molecular Ions to Millikelvin Temperatures

Abstract

Gas-phase singly protonated organic molecules of mass 410 Da (Alexa Fluor 350) have been cooled from ambient temperature to the hundred millikelvin range by Coulomb interaction with laser-cooled barium ions. The molecules were generated by an electrospray ionization source, transferred to and stored in a radio-frequency trap together with the atomic ions. Observations are well described by molecular dynamics simulations, which are used to determine the spatial distribution and thermal energy of the molecules. In one example, an ensemble of 830 laser-cooled {sup 138}Ba{sup +} ions cooled 200 molecular ions to less than 115 mK. The demonstrated technique should allow a large variety of protonated molecules to be sympathetically cooled, including molecules of much higher mass, such as proteins.

Authors:
; ; ; ; ;  [1]
  1. Institut fuer Experimentalphysik, Heinrich-Heine-Universitaet Duesseldorf, 40225 Duesseldorf (Germany)
Publication Date:
OSTI Identifier:
20861480
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 97; Journal Issue: 24; Other Information: DOI: 10.1103/PhysRevLett.97.243005; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; AMBIENT TEMPERATURE; ATOMIC IONS; BARIUM 138; BARIUM IONS; COOLING; IONIZATION; LASERS; MASS; MOLECULAR DYNAMICS METHOD; MOLECULAR IONS; MOLECULES; RADIOWAVE RADIATION; SIMULATION; SPATIAL DISTRIBUTION; TRAPS

Citation Formats

Ostendorf, A., Zhang, C. B., Wilson, M. A., Offenberg, D., Roth, B., and Schiller, S. Sympathetic Cooling of Complex Molecular Ions to Millikelvin Temperatures. United States: N. p., 2006. Web. doi:10.1103/PHYSREVLETT.97.243005.
Ostendorf, A., Zhang, C. B., Wilson, M. A., Offenberg, D., Roth, B., & Schiller, S. Sympathetic Cooling of Complex Molecular Ions to Millikelvin Temperatures. United States. doi:10.1103/PHYSREVLETT.97.243005.
Ostendorf, A., Zhang, C. B., Wilson, M. A., Offenberg, D., Roth, B., and Schiller, S. Fri . "Sympathetic Cooling of Complex Molecular Ions to Millikelvin Temperatures". United States. doi:10.1103/PHYSREVLETT.97.243005.
@article{osti_20861480,
title = {Sympathetic Cooling of Complex Molecular Ions to Millikelvin Temperatures},
author = {Ostendorf, A. and Zhang, C. B. and Wilson, M. A. and Offenberg, D. and Roth, B. and Schiller, S.},
abstractNote = {Gas-phase singly protonated organic molecules of mass 410 Da (Alexa Fluor 350) have been cooled from ambient temperature to the hundred millikelvin range by Coulomb interaction with laser-cooled barium ions. The molecules were generated by an electrospray ionization source, transferred to and stored in a radio-frequency trap together with the atomic ions. Observations are well described by molecular dynamics simulations, which are used to determine the spatial distribution and thermal energy of the molecules. In one example, an ensemble of 830 laser-cooled {sup 138}Ba{sup +} ions cooled 200 molecular ions to less than 115 mK. The demonstrated technique should allow a large variety of protonated molecules to be sympathetically cooled, including molecules of much higher mass, such as proteins.},
doi = {10.1103/PHYSREVLETT.97.243005},
journal = {Physical Review Letters},
number = 24,
volume = 97,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}