Characterizing the Quantum-Confined Stark Effect in Semiconductor Quantum Dots and Nanorods for Single-Molecule Electrophysiology

Yung Kuo, Jack Li, Xavier Michalet, Alexey Chizhik, Noga Meir, Omri Bar-Elli, Emory Chan, Dan Oron, Joerg Enderlein, Shimon Weiss

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

We optimized the performance of quantum-confined Stark effect (QCSE)-based voltage nanosensors. A high-throughput approach for single-particle QCSE characterization was developed and utilized to screen a library of such nanosensors. Type-II ZnSe/CdS-seeded nanorods were found to have the best performance among the different nanosensors evaluated in this work. The degree of correlation between intensity changes and spectral changes of the exciton's emission under an applied field was characterized. An upper limit for the temporal response of individual ZnSe/CdS nanorods to voltage modulation was characterized by high-throughput, high temporal resolution intensity measurements using a novel photon-counting camera. The measured 3.5 μs response time is limited by the voltage modulation electronics and represents ∼30 times higher bandwidth than needed for recording an action potential in a neuron.

Original languageEnglish
Pages (from-to)4788-4800
Number of pages13
JournalACS Photonics
Volume5
Issue number12
DOIs
Publication statusPublished - Dec 19 2018

Keywords

  • membrane potential
  • nanorod
  • quantum dot
  • quantum-confined Stark effect
  • single molecule
  • voltage sensor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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