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AND molecular logic using semiconductor quantum dots

Kaur, Navneet, Singh, Narinder, Callan, Bridgeen and Callan, John (2010) AND molecular logic using semiconductor quantum dots. SENSORS AND ACTUATORS B-CHEMICAL, 144 (1). pp. 88-91. [Journal article]

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DOI: 10.1016/j.snb.2009.09.066


CdSe/ZnS quantum clots (QD) have been surface functionalised with mercaptoaniline and N-(o-methoxyphenyl)aza-15-crown-5 receptors, the former serving as a receptor for protons with the latter serving as a receptor for sodium ions. In conditions of low protons and sodium ions the QD fluorescence Was quenched by a photoinduced electron transfer (PET) process from the receptors to the excited QD. The simultaneous addition of both protons and sodium ions, however, restored the QD emission while the independent addition of either ion had no effect. Thus, the conditions of a two input AND molecular logic gate were satified with protons and sodium ions as inputs and 560 nm QD fluorescence as Output. (C) 2009 Elsevier B.V. All rights reserved.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences > School of Pharmacy and Pharmaceutical Science
Faculty of Life and Health Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Pharmacy & Pharmaceutical Sciences
ID Code:19934
Deposited By: Professor John Callan
Deposited On:13 Sep 2011 13:57
Last Modified:19 Nov 2012 15:15

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