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Thermochromic Wood Veneer Synchronized Color-Transparency Switching for Multimodal Dynamic Response.

Chuangchuang Xu1, Qingshan Si1, Shuai Wu1

  • 1Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.

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|June 5, 2026
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Summary
This summary is machine-generated.

Researchers developed a thermochromic wood veneer (TWV) for optical switching and multimodal thermal activation. This stable, responsive material offers new possibilities for smart devices and information encryption.

Keywords:
Cell wall engineeringInformation encryptionMultimodal manipulationOptical switchingThermal responseWood nanotechnology

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Thermally responsive optical materials are crucial for applications like smart sensors and information encryption.
  • Current challenges include achieving simultaneous optical switching, multimodal responsiveness, and long-term stability.

Purpose of the Study:

  • To develop a novel thermochromic wood veneer (TWV) with integrated color-transparency switching and multimodal thermal activation.
  • To explore the potential of natural resources in creating advanced optical and thermal dynamic-response devices.

Main Methods:

  • Incorporating thermochromic microcapsules into a porous wood scaffold.
  • Inducing interactions between polyvinyl alcohol (PVA) and cellulose molecules.
  • Characterizing the TWV's thermal response, stability, and activation modalities.

Main Results:

  • The TWV exhibits a response temperature of approximately 31 °C under ambient conditions.
  • It demonstrates excellent cyclic stability over 500 thermal cycles and a wide tolerant temperature range (-196 °C to 100 °C).
  • Multicolor-transparency switching was achieved through various thermal activation methods, including bulk heating, heat transfer printing, and lithography printing.

Conclusions:

  • The developed TWV offers a stable and versatile platform for optical and thermal dynamic-response devices.
  • This advancement in wood nanotechnology provides insights for utilizing natural resources in smart applications.
  • Potential applications include heat transfer/lithography printing, information encryption/decryption, and smart sensors and tags.