Photophysical and photochemical characterisation of bacterial semiconductor cadmium sulfide particles

Smith, Peter R., Holmes, Justin D., Richardson, David J. ORCID: https://orcid.org/0000-0002-6847-1832, Russell, David A. and Sodeau, John R. (1998) Photophysical and photochemical characterisation of bacterial semiconductor cadmium sulfide particles. Journal of the Chemical Society - Faraday Transactions, 94 (9). pp. 1235-1241. ISSN 0956-5000

Full text not available from this repository. (Request a copy)

Abstract

Klebsiella pneumoniae forms electron-dense cadmium sulfide particles (ca. 5-200 nm in diameter) on the cell surface in response to the presence of cadmium ions in the growth medium. In the current study, these 'bio-semiconductor' particles have been spectroscopically characterised using UV-VIS absorption and luminescence analysis. The spectroscopic properties observed suggest that they are similar in size and possess photoactive traits analogous to CdS systems prepared by conventional chemical methods. The optical nature of the bacterial semiconductor particles means that, in principle, they are capable of performing a variety of photoredox reactions. The reactions involving photoelectrochemical indicators such as methyl viologen (MV2+) and methyl orange (MO-) are considered and, by comparing initial rates of reaction and altering reaction variables, a general mechanism of photoactivity for the cadmium sulfide 'bio-semiconductor' is proposed.

Item Type: Article
Uncontrolled Keywords: physical and theoretical chemistry ,/dk/atira/pure/subjectarea/asjc/1600/1606
Faculty \ School:
Faculty of Science > School of Biological Sciences
Faculty of Science > School of Chemical Sciences and Pharmacy
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 14 Jul 2022 16:31
Last Modified: 15 Jul 2022 00:24
URI: https://ueaeprints.uea.ac.uk/id/eprint/86131
DOI: 10.1039/a708742j

Actions (login required)

View Item View Item