TY - JOUR
T1 - AND molecular logic using semiconductor quantum dots
AU - Kaur, Navneet
AU - Singh, Narinder
AU - Callan, Bridgeen
AU - Callan, John
PY - 2010/1
Y1 - 2010/1
N2 - 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.
AB - 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.
U2 - 10.1016/j.snb.2009.09.066
DO - 10.1016/j.snb.2009.09.066
M3 - Article
VL - 144
SP - 88
EP - 91
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
SN - 0925-4005
IS - 1
ER -