Optimising electrogenerated chemiluminescence of quantum dots via co-reactant selection

Rebekah Russell, Alasdair J. Stewart, Lynn Dennany

Research output: Contribution to journalSpecial issuepeer-review

11 Citations (Scopus)
129 Downloads (Pure)


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.
Original languageEnglish
Pages (from-to)7129-7136
Number of pages8
JournalAnalytical and Bioanalytical Chemistry
Issue number25
Early online date25 Apr 2016
Publication statusPublished - 1 Oct 2016


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


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