Introduction
A team of researchers from Shenzhen University in China has developed a thin film that mimics the nanostructures found on butterfly wings. The film is designed to reflect and scatter light, similar to energy-saving reflective paints. However, unlike traditional paints, the film offers a wide range of vibrant colors. This innovation has the potential to keep cars cooler when applied to their exteriors, reducing the need for air conditioning and ultimately increasing the mileage of electric vehicles.
Data
- The film is a few micrometers thick and consists of three layers.
- The top layer is made of a compound of titanium, silicon, and oxygen.
- The second layer is a special frosted glass that mimics the tiny structures found on butterfly wings.
- The third layer is a thin silver mirror.
- By diffusing light, the film creates a cooling effect.
- The researchers were able to control the reflection and change the color by tweaking the layers.
- The film samples were exposed to sunlight for approximately 7 hours and stayed about 2°C cooler than the surrounding air.
- When attached to a car, the film maintained a temperature of around 42°C while a conventional blue paint reached 75°C under sunlight.
- The film retains its color even when viewed from the side, a feature uncommon in artificial nanostructures that manipulate light.
- The researchers envision using the film to cover electric vehicles, reducing energy consumption and increasing mileage.
