Researchers at the University of Hong Kong (HKU) have designed an innovative pixelated, soft, color-changing system called a Morphable Concavity Array (MoCA).
Pixelated, soft, color-changing systems are malleable structures that can change color by manipulating light. They have applications in a wide range of industries, from medical bandages that change color if there is an infection, to foldable screens on smartphones and tablets, as well as wearable technology where sensors are integrated into the clothing fabric.
MoCA fabricated by the HKU researchers is a thin rubber-like structure that consists of two layers—the top layer is a photonic crystal elastomer actuator film and the bottom one is a hole array—a lattice with regularly spaced round holes. If ethanol is added to the pNIPAM layer, it swells, and the resulting tension pulls the elastomer GPDMS layer downward into the hole in the array, producing a dish-like concave shape called morphable concavity that acts as a pixel. After the concavity is formed, the red light is blocked and the visible color of the pixel changes from red to blue.called dual-color micro-concavities that produce vibrant, iridescent colors.
"The color-changing strategy of MoCA is achieved by changing its local morphology, specifically by controlling the transition between 'flat' and 'concave' states. This sets MoCA apart from other pixelated color-changing systems," said Dr. Pan.
Australia Latest News, Australia Headlines
Similar News:You can also read news stories similar to this one that we have collected from other news sources.
Researchers connect Alzheimer's-associated genetic variants with brain cell functionResearch reveals new non-coding genetic variants associated with Alzheimer's disease functioning in microglia -- brain cells already implicated in the progression of this often-fatal neurodegenerative condition.
Read more »
Researchers Warn: Contaminated Water Discovered in Fast-Food Soda FountainsStudy authors advise regular cleaning of water dispensers. Loma Linda University (LLU) researchers found microbial contamination in common sources of drinking water in the Eastern Coachella Valley, including soda fountains at fast-food restaurants. Their findings revealed that 41% of the water samp
Read more »
Unusual number of newts dying on Olympic Peninsula, researchers sayThe Washington Department of Fish and Wildlife is investigating why a large number of rough-skinned newts are dying without clear causes of death.
Read more »
Researchers discover attempt to infect leading Egyptian opposition politician with Predator spywareCybersecurity researchers say a leading Egyptian opposition politician was targeted with Predator spyware after announcing a president bid.
Read more »
How a camp for kids with disabilities inspired James McBride’s novel“The Heaven & Earth Grocery Store” was inspired by the four summers McBride spent working at the Variety Club Camp for Handicapped Children.
Read more »