AND molecular logic using semiconductor quantum dots

Navneet Kaur, Narinder Singh, Bridgeen Callan, John Callan

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

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.
LanguageEnglish
Pages88-91
JournalSENSORS AND ACTUATORS B-CHEMICAL
Volume144
Issue number1
DOIs
Publication statusPublished - Jan 2010

Fingerprint

Semiconductor quantum dots
Ions
Protons
Sodium
Fluorescence
Logic gates
Electrons

Cite this

Kaur, Navneet ; Singh, Narinder ; Callan, Bridgeen ; Callan, John. / AND molecular logic using semiconductor quantum dots. 2010 ; Vol. 144, No. 1. pp. 88-91.
@article{db8e234886e5455a9a7b106888453202,
title = "AND molecular logic using semiconductor quantum dots",
abstract = "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.",
author = "Navneet Kaur and Narinder Singh and Bridgeen Callan and John Callan",
year = "2010",
month = "1",
doi = "10.1016/j.snb.2009.09.066",
language = "English",
volume = "144",
pages = "88--91",
number = "1",

}

AND molecular logic using semiconductor quantum dots. / Kaur, Navneet; Singh, Narinder; Callan, Bridgeen; Callan, John.

Vol. 144, No. 1, 01.2010, p. 88-91.

Research output: Contribution to journalArticle

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

IS - 1

ER -