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Titolo:
The formation of N2O nanoparticles in a collisional cooling cell between 4and 110 K
Autore:
Kunzmann, MK; Signorell, R; Taraschewski, M; Bauerecker, S;
Indirizzi:
Univ Gottingen, Inst Phys Chem, D-37077 Gottingen, Germany Univ GottingenGottingen Germany D-37077 hem, D-37077 Gottingen, Germany GKSS Forschungszentrum Geesthacht GmbH, Inst Phys & Chem Analyt, D-21502 Geesthacht, Germany GKSS Forschungszentrum Geesthacht GmbH Geesthacht Germany D-21502 ermany
Titolo Testata:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
fascicolo: 17, volume: 3, anno: 2001,
pagine: 3742 - 3749
SICI:
1463-9076(2001)3:17<3742:TFONNI>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
DEPENDENT OPTICAL-CONSTANTS; CLUSTERED CARBON-DIOXIDE; LARGE CO2 CLUSTERS; INFRARED-SPECTROSCOPY; SPECTRAL SIMPLIFICATION; NITROUS-OXIDE; SCATTERING; ICE; AEROSOLS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Signorell, R Univ Gottingen, Inst Phys Chem, Tammannstr 6, D-37077 Gottingen, Germany Univ Gottingen Tammannstr 6 Gottingen Germany D-37077 ermany
Citazione:
M.K. Kunzmann et al., "The formation of N2O nanoparticles in a collisional cooling cell between 4and 110 K", PHYS CHEM P, 3(17), 2001, pp. 3742-3749

Abstract

N2O (CO2) particles covering a vast size range from some nanometres up to some hundred nanometres were formed by injecting gaseous N2O (CO2) into a collisional cooling cell at temperatures between 4 and 110 K. FTIR spectroscopy was used to study the vibrational dynamics of the nanoparticles betweenabout 600 and 4000 cm(-1). For the spectra of the bigger particles formed at temperatures around 78 K, we have studied the influence of the experimental conditions on the fine structure of the strong absorption bands and itstemporal behavior. From an estimate of the particle sizes, we conclude that the observed changes in the fine structure are not simple size effects; they are likely to be due to a change in the particle shape or in the molecular order. From a comparison with infrared spectra of clusters generated ina supersonic jet expansion, we estimate the size of the particles producedat temperatures below 10 K to lie around one nanometre.

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Documento generato il 01/10/20 alle ore 16:07:21