Selectively Patterning Polymer Opal Films via Microimprint Lithography

Large-scale structural color fl exible coatings have been hard to create, and patterning color on them is key to many applications, including large-area strain sensors, wall-size displays, security devices, and smart fabrics. To achieve controlled tuning, a micro-imprinting technique is applied here to pattern both the surface morphology and the structural color of the polymer opal fi lms (POF…