HomeProjectsSustainable Development and Green TechnologiesTransparent Photocatalytic Thin Films for Self-Sterilizing Facilities and Devices

Transparent Photocatalytic Thin Films for Self-Sterilizing Facilities and Devices

Project Quick Facts

Principal Investigator

  • Prof. YU Chai Mei Jimmy

    Department of Chemistry

  • Dr. CHAN Ka Long Donald

    Department of Chemistry

  • Funding

    Innovation and Technology Commission

  • Patent



Photocatalysis is well-known for its capability to degrade a wide range of organic contamination including bacteria and viruses. We have been working on the incorporation of transparent photocatalytic thin films into some frequently touched facilities and devices. These thin films are able to harvest both light originated from the devices and indoor light/sunlight for automated photocatalytic and antibacterial effects.

Problem to be solved:

Facilities such as door handles and elevator buttons in urban spaces are constantly touched and show high levels of bacterial contamination. With the advancement of touch screen and display technologies, interactive touch system also becomes a part of our city. Adhesion and growth of germs on the frequently touched surfaces are critical to the spread of infectious diseases. Application of photocatalytic thin film on the facilities would be beneficial in minimizing the spread of germs around the area. The transparent nature of photocatalytic thin film maximizes harvesting of light from different directions without affecting the original function and appearance of the facilities or devices.


Various frequently touched facilities and devices (e.g. door handles, elevator buttons, touch screen devices)

Target Users:

Hospitals, schools, shopping malls and restaurants

Mechanism of photocatalysis
Photocatalysts as powders and thin
Working principle of self-sanitizing door handle
Antibacterial effect of self-sanitizing door handle

Uniqueness and Competitive Advantages:

  • Automatic sterilization
  • Long-lasting
  • Reduced use of harmful or irritating disinfectants

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