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Related Experiment Video

Updated: Nov 10, 2025

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

Published on: February 27, 2019

Dynamic upconversion multicolour editing enabled by molecule-assisted opto-electrochemical modulation.

Yiming Wu¹, Jiahui Xu¹, Xian Qin²

¹Department of Chemistry, National University of Singapore, Singapore, Singapore.

Nature Communications

|April 2, 2021

Summary

This summary is machine-generated.

Researchers electrically controlled nanoparticle luminescence by linking them to molecules. This enables dynamic color editing and the creation of optical logic gates for advanced photonic circuits.

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Area of Science:

Nanoscience and Nanotechnology
Materials Science
Optoelectronics

Background:

Lanthanide-activated nanoparticles are promising for nonlinear upconversion of infrared light.
Current control over upconversion emission is limited to material composition, structure, and pumping conditions.

Purpose of the Study:

To demonstrate electrical control over anti-Stokes luminescence from upconversion nanoparticles.
To develop a method for dynamic color editing and opto-electrochemical logic gates.

Main Methods:

Coupling upconversion nanoparticles with electrochemically responsive molecules.
Electrically tuning molecular orbital energy levels to modulate light absorption.
Constructing a programmable logic gate array using opto-electrochemical modulation.

Main Results:

Achieved reversible control of molecular absorption and dynamic color editing of anti-Stokes luminescence at the single-particle level.
Demonstrated a functional opto-electrochemical logic gate array.
Showcased millisecond photonic readout for information-encrypted electrical signals.

Conclusions:

Precise electrical control over anti-Stokes luminescence is achievable by interfacing nanoparticles with responsive molecules.
This approach enables novel applications in infrared logic switches and high-fidelity photonic circuits.