Adsorption interaction of carrier-free thallium species with gold and quartz surfaces

Serov, A.; Eichler, R.; Dressler, R.; Piguet, D.; Türler, A.; Vögele, A.; Wittwer, D.; Gäggeler, H. W. (2013). Adsorption interaction of carrier-free thallium species with gold and quartz surfaces. Radiochimica acta, 101(7), pp. 421-425. Oldenbourg Wissenschaftsverlag GmbH 10.1524/ract.2013.2045

[img]
Preview
Text
ract.2013.2045.pdf - Published Version
Available under License Publisher holds Copyright.

Download (381kB) | Preview
[img]
Preview
Text
ract.2013.2045.pdf - Other
Available under License Publisher holds Copyright.

Download (468kB) | Preview

The adsorption interactions of thallium and its compounds with gold and quartz surfaces were investigated. Carrier-free amounts of thallium were produced in nuclear fusion reactions of alpha particles with thick gold targets. The method chosen for the studies was gas thermochromatography and varying the redox potential of the carrier gases. It was observed that thallium is extremely sensitive to trace amounts of oxygen and water, and can even be oxidized by the hydroxyl groups located on the quartz surface. The experiments on a quartz surface with O2, He, H2 gas in addition with water revealed the formation and deposition of only one thallium species – TlOH. The adsorption enthalpy was determined to be Δ HSiO2ads(TlOH) = −134 ± 5 kJ mol−1. A series of experiments using gold as stationary surface and different carrier gases resulted in the detection of two thallium species – metallic Tl (H2 as carrier gas) and TlOH (O2, O2+H2O and H2+H2O as pure carrier gas or carrier gas mixture) with Δ HAuads(Tl) = −270 ± 10 kJ mol− and Δ HAuads(TlOH) = −146 ± 3 kJ mol−1. These data demonstrate a weak interaction of TlOH with both quartz and gold surfaces. The data represent important information for the design of future experiments with the heavier homologue of Tl in group 13 of the periodic table – element 113 (E113).

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Serov, Alexey; Eichler, Robert; Türler, Andreas and Wittwer, David

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry

ISSN:

0033-8230

Publisher:

Oldenbourg Wissenschaftsverlag GmbH

Language:

English

Submitter:

Franziska Bornhauser-Rufer

Date Deposited:

04 Apr 2014 19:39

Last Modified:

27 Apr 2018 11:06

Publisher DOI:

10.1524/ract.2013.2045

BORIS DOI:

10.7892/boris.46188

URI:

https://boris.unibe.ch/id/eprint/46188

Actions (login required)

Edit item Edit item
Provide Feedback