Rapid Voltage Sensing with Single Nanorods via the Quantum Confined Stark Effect

Omri Bar-Elli, Dan Steinitz, Gaoling Yang, Ron Tenne, Anastasia Ludwig, Yung Kuo, Antoine Triller, Shimon Weiss, Dan Oron

Research output: Contribution to journalArticle

7 Citations (Scopus)


Properly designed colloidal semiconductor quantum dots (QDs) have already been shown to exhibit high sensitivity to external electric fields via the quantum confined Stark effect (QCSE). Yet, detection of the characteristic spectral shifts associated with the effect of the QCSE has traditionally been painstakingly slow, dramatically limiting the sensitivity of these QD sensors to fast transients. We experimentally demonstrate a new detection scheme designed to achieve shot-noise-limited sensitivity to emission wavelength shifts in QDs, showing feasibility for their use as local electric field sensors on the millisecond time scale. This regime of operation is already potentially suitable for detection of single action potentials in neurons at a high spatial resolution.

Original languageEnglish
Pages (from-to)2860-2867
Number of pages8
JournalACS Photonics
Issue number7
Publication statusPublished - Jul 18 2018



  • membrane potential sensing
  • quantum confined Stark effect
  • quantum dots

ASJC Scopus subject areas

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

Cite this

Bar-Elli, O., Steinitz, D., Yang, G., Tenne, R., Ludwig, A., Kuo, Y., Triller, A., Weiss, S., & Oron, D. (2018). Rapid Voltage Sensing with Single Nanorods via the Quantum Confined Stark Effect. ACS Photonics, 5(7), 2860-2867. https://doi.org/10.1021/acsphotonics.8b00206