From Event: SPIE Optical Engineering + Applications, 2017
Butterfly wings are live organs embedded with multiple sensory neurons and, in some species, with pheromoneproducing cells. The proper function of butterfly wings demands a suitable temperature range, but the wings can overheat quickly in the sun due to their small thermal capacity. We developed an infrared technique to map butterfly wing temperatures and discovered that despite the wings’ diverse visible colors, regions of wings that contain live cells are the coolest, resulting from the thickness of the wings and scale nanostructures. We also demonstrated that butterflies use behavioral traits to prevent overheating of their wings.
Cheng-Chia Tsai, Norman Nan Shi, Crystal Ren, Julianne Pelaez, Gary D. Bernard, Nanfang Yu, and Naomi Pierce, "Butterflies regulate wing temperatures using radiative cooling," Proc. SPIE 10367, Light in Nature VI, 103670A (Presented at SPIE Optical Engineering + Applications: August 07, 2017; Published: 6 September 2017); https://doi.org/10.1117/12.2274297.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon