An Active and Passive Controllable Smart Glass Based on an Eco-Friendly Aqueous Solution

Tsun Han Wang, Shie Chang Jeng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A smart glass, based on an eco-friendly aqueous solution, capable of controlling both transparency for privacy and the radiant energy flow for thermal insulation, is demonstrated. The transparency of the glass is self-adaptive in response to the ambient environment and can also be electrically controlled on demand. The aqueous solution used in this study is composed of water and a non-ionic surfactant used in the food industry. As the temperature of the aqueous solutions increases above the cloud point, the solution undergoes phase separation into a micelle-rich phase and a micelle-poor phase causing the incident light to be scattered by the micellar clusters. Good thermo-responsive optical properties are achieved with ≈77% luminous transmittance, ≈90% haze, and ≈64% solar regulation. The proposed smart glass fabricated from a biocompatible aqueous solution would be eco-friendly as well as exhibiting excellent energy conservation performance.

Original languageEnglish
Article number2301396
JournalAdvanced Materials Technologies
Issue number3
StatePublished - 5 Feb 2024


  • aqueous solutions
  • eco-friendly
  • smart glasses
  • thermo-responsive properties


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