Ratiometric fluorescence, electrochemiluminescence, and photoelectrochemical chemo/biosensing based on semiconductor quantum dots

Peng Wu, Xiandeng Hou, Jing-Juan Xu, Hong-Yuan Chen, Gang Han, Taleb Mokari, Caroline Ajo-Franklin, Bruce E Cohen, Yasuhiro Shirasaki, Geoffrey J Supran, Moungi G Bawendi, Vladimir Bulović, Warren C W Chan, Shuming Nie, Burak Guzelturk, Pedro Ludwig Hernandez Martinez, Qing Zhang, Qihua Xiong, Handong Sun, Xiao Wei SunAlexander O Govorov, Hilmi Volkan Demir, Jin Ho Bang, Prashant V Kamat, Yongbing Lou, Yixin Zhao, Jinxi Chen, Jun-Jie Zhu

Research output: Contribution to journalArticle


Colloidal semiconductor nanocrystals or quantum dots (QDs) have been facilitating the development of sensitive fluorescence sensors over the past decade, due to their unique photophysical properties, versatile surface chemistry and ligand binding ability, and the possibility of the encapsulation in different materials or attachment to different functional materials, while retaining their native luminescence property. The optical metal ion chemosensors with high sensitivity and selectivity have been developed due to the importance of the metal ions' fundamental roles, possessed in a wide range of biological processes and the aquatic environment. This review addresses the different sensing strategies with chemically modified QD hybrid structures for the sensing of metal ions in aqueous solution or an in vivo environment, and discusses the photophysical mechanisms in the different sensor systems while comparing their detecting/sensing selectivity. The perspectives for the future potential developments in QD based optical sensing for metal ions are discussed.
Original languageEnglish
Pages (from-to)9421-9427
JournalJournal of Physical Chemistry Letters
Issue number6
StatePublished - 2014


  • Excitonics
  • Förster resonance energy transfer
  • carbon nanotubes
  • exciton transfer
  • excitonic interactions
  • lighting
  • nonradiative energy transfer
  • organics
  • plexcitons
  • quantum dots
  • quantum wells
  • quantum wires


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