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Related Experiment Video

Updated: Mar 25, 2026

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

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Published on: May 13, 2020

Macroscopic switches constructed through host-guest chemistry.

Yue Sun¹, Junkai Ma¹, Demei Tian¹

¹Key Laboratory of Pesticide and Chemical Biology (CCNU), Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China. lhbing@mail.ccnu.edu.cn.

Chemical Communications (Cambridge, England)

|February 25, 2016

Summary

Researchers developed visual molecular switches using macrocyclic compounds. These switches change surface properties, like contact angles, for applications in smart devices and materials science.

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Area of Science:

Supramolecular Chemistry
Materials Science
Surface Science

Background:

Molecular switches offer controllable and responsive functions for advanced molecular devices.
Interfacing molecular switches with the macroscopic world enables naked-eye observation of their changes.
Visual macroscopic switches are crucial for intelligent microfluidics and lab-on-chip devices.

Purpose of the Study:

To explore the development of macroscopic surface switches based on molecular switch systems.
To investigate the use of host-guest interactions for creating visually detectable surface changes.
To highlight the potential applications of these novel functional surfaces.

Main Methods:

Utilizing macrocyclic compounds for surface functionalization through reversible noncovalent interactions.
Employing surface contact angle measurements to study microscopic origins of macroscopic changes.
Developing and characterizing new functional surfaces based on macrocyclic hosts.

Main Results:

Demonstrated the formation of macroscopic contact angle switches using various macrocyclic hosts.
Highlighted the properties of these newly developed functional surfaces.
Showcased the potential applications of these switchable surfaces in different fields.

Conclusions:

Macrocyclic compounds are effective for creating visually switchable surfaces.
Surface contact angle measurements are valuable for understanding these macroscopic changes.
These advancements pave the way for new intelligent materials and devices.