Optimising electrogenerated chemiluminescence of quantum dots via co-reactant selection

Rebekah Russell, Alasdair J. Stewart, Lynn Dennany

Research output: Contribution to journalSpecial issue

9 Citations (Scopus)

Abstract

We demonstrate that for quantum dot (QD) based electrochemiluminescence (ECL), the commonly used co-reactant does not preform as effectively as potassium persulfate. By exploiting this small change is co-reactant, ECL intensity can be enhanced dramatically in a cathodic based ECL system. However, TPA remains the preferential co-reactant based system for anodic ECL. This phenomenon can be rationalised through the relative energy level profiles of the QD to the co-reactant in conjunction with the applied potential range. This work highlights the importance of understanding the co-reactant pathway for optimising the application of ECL to bioanalytical analysis, in particular for near infrared (NIR) QDs which can be utilised for analysis in blood.
LanguageEnglish
Pages7129-7136
Number of pages8
JournalAnalytical and Bioanalytical Chemistry
Volume408
Issue number25
Early online date25 Apr 2016
DOIs
Publication statusPublished - 1 Oct 2016

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Quantum Dots
Chemiluminescence
Luminescence
Semiconductor quantum dots
Electron energy levels
Blood
Infrared radiation
potassium persulfate

Keywords

  • electrochemiluminescence (ECL)
  • co reactants
  • quantum dot
  • sensor applications

Cite this

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title = "Optimising electrogenerated chemiluminescence of quantum dots via co-reactant selection",
abstract = "We demonstrate that for quantum dot (QD) based electrochemiluminescence (ECL), the commonly used co-reactant does not preform as effectively as potassium persulfate. By exploiting this small change is co-reactant, ECL intensity can be enhanced dramatically in a cathodic based ECL system. However, TPA remains the preferential co-reactant based system for anodic ECL. This phenomenon can be rationalised through the relative energy level profiles of the QD to the co-reactant in conjunction with the applied potential range. This work highlights the importance of understanding the co-reactant pathway for optimising the application of ECL to bioanalytical analysis, in particular for near infrared (NIR) QDs which can be utilised for analysis in blood.",
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Optimising electrogenerated chemiluminescence of quantum dots via co-reactant selection. / Russell, Rebekah; Stewart, Alasdair J.; Dennany, Lynn.

In: Analytical and Bioanalytical Chemistry, Vol. 408, No. 25, 01.10.2016, p. 7129-7136.

Research output: Contribution to journalSpecial issue

TY - JOUR

T1 - Optimising electrogenerated chemiluminescence of quantum dots via co-reactant selection

AU - Russell, Rebekah

AU - Stewart, Alasdair J.

AU - Dennany, Lynn

N1 - The final publication is available at Springer via http://dx.doi.org/10.1007/s00216-016-9557-1

PY - 2016/10/1

Y1 - 2016/10/1

N2 - We demonstrate that for quantum dot (QD) based electrochemiluminescence (ECL), the commonly used co-reactant does not preform as effectively as potassium persulfate. By exploiting this small change is co-reactant, ECL intensity can be enhanced dramatically in a cathodic based ECL system. However, TPA remains the preferential co-reactant based system for anodic ECL. This phenomenon can be rationalised through the relative energy level profiles of the QD to the co-reactant in conjunction with the applied potential range. This work highlights the importance of understanding the co-reactant pathway for optimising the application of ECL to bioanalytical analysis, in particular for near infrared (NIR) QDs which can be utilised for analysis in blood.

AB - We demonstrate that for quantum dot (QD) based electrochemiluminescence (ECL), the commonly used co-reactant does not preform as effectively as potassium persulfate. By exploiting this small change is co-reactant, ECL intensity can be enhanced dramatically in a cathodic based ECL system. However, TPA remains the preferential co-reactant based system for anodic ECL. This phenomenon can be rationalised through the relative energy level profiles of the QD to the co-reactant in conjunction with the applied potential range. This work highlights the importance of understanding the co-reactant pathway for optimising the application of ECL to bioanalytical analysis, in particular for near infrared (NIR) QDs which can be utilised for analysis in blood.

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KW - sensor applications

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