气候变化领域集成服务门户(CCPortal): Infrared optical and thermal properties of microstructures in butterfly wings

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DOI	10.1073/pnas.1906356117
	Infrared optical and thermal properties of microstructures in butterfly wings
	Krishna A.; Nie X.; Warren A.D.; Llorente-Bousquets J.E.; Briscoe A.D.; Lee J.
发表日期	2020
ISSN	0027-8424
起始页码	1566
结束页码	1572
卷号	117 期号:3
英文摘要	While surface microstructures of butterfly wings have been extensively studied for their structural coloration or optical properties within the visible spectrum, their properties in infrared wavelengths with potential ties to thermoregulation are relatively unknown. The midinfrared wavelengths of 7.5 to 14 μm are particularly important for radiative heat transfer in the ambient environment, because of the overlap with the atmospheric transmission window. For instance, a high midinfrared emissivity can facilitate surface cooling, whereas a low midinfrared emissivity can minimize heat loss to surroundings. Here we find that the midinfrared emissivity of butterfly wings from warmer climates such as Archaeoprepona demophoon (Oaxaca, Mexico) and Heliconius sara (Pichincha, Ecuador) is up to 2 times higher than that of butterfly wings from cooler climates such as Celastrina echo (Colorado) and Limenitis arthemis (Florida), using Fourier-transform infrared (FTIR) spectroscopy and infrared thermography. Our optical computations using a unit cell approach reproduce the spectroscopy data and explain how periodic microstructures play a critical role in the midinfrared. The emissivity spectrum governs the temperature of butterfly wings, and we demonstrate that C. echowings heat up to 8 °C more than A. demophoon wings under the same sunlight in the clear sky of Irvine, CA. Furthermore, our thermal computations show that butterfly wings in their respective habitats can maintain a moderate temperature range through a balance of solar absorption and infrared emission. These findings suggest that the surface microstructures of butterfly wings potentially contribute to thermoregulation and provide an insight into butterflies' survival. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Butterflies; Microstructures; Spectral emissivity; Thermoregulation
语种	英语
scopus关键词	article; butterfly; climate; Colorado; controlled study; Ecuador; Florida; Fourier transform infrared spectroscopy; habitat; Mexico; nonhuman; sunlight; thermography; thermoregulation; wing; infrared photography
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/161082
作者单位	Krishna, A., Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, United States; Nie, X., Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, United States; Warren, A.D., McGuire Center for Lepidoptera and Biodiversity, Florida Museum of Natural History, University of Florida, Gainesville, FL 32611, United States; Llorente-Bousquets, J.E., Museo de Zoología, Departamento de Biología Evolutiva, Facultad de Ciencias, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico; Briscoe, A.D., Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, United States; Lee, J., Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, United States
推荐引用方式 GB/T 7714	Krishna A.,Nie X.,Warren A.D.,et al. Infrared optical and thermal properties of microstructures in butterfly wings[J],2020,117(3).
APA	Krishna A.,Nie X.,Warren A.D.,Llorente-Bousquets J.E.,Briscoe A.D.,&Lee J..(2020).Infrared optical and thermal properties of microstructures in butterfly wings.Proceedings of the National Academy of Sciences of the United States of America,117(3).
MLA	Krishna A.,et al."Infrared optical and thermal properties of microstructures in butterfly wings".Proceedings of the National Academy of Sciences of the United States of America 117.3(2020).