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Wood-based superblack
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DOI：10.1038/s41467-023-43594-4.png)
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摘要
En 中文
Light is a powerful and sustainable resource, but it can be detrimental to the performance and longevity of optical devices. Materials with near-zero light reflectance, i.e. superblack materials, are sought to improve the performance of several light-centered technologies. Here we report a simple top-down strategy, guided by computational methods, to develop robust superblack materials following metal-free wood delignification and carbonization (1500 degrees C). Subwavelength severed cells evolve under shrinkage stresses, yielding vertically aligned carbonmicrofiber arrayswith a thickness of similar to 100 mu m and light reflectance as low as 0.36% and independent of the incidence angle. The formation of such structures is rationalized based on delignification method, lignin content, carbonization temperature and wood density. Moreover, our measurements indicate a laser beam reflectivity lower than commercial light stoppers in current use. Overall, the wood-based superblack material is introduced as a mechanically robust surrogate for microfabricated carbon nanotube arrays.
Keyword:
ALIGNED CARBON NANOTUBES
REFLECTANCE
ABSORBERS
SURFACES
AEROGELS
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期刊
IF:
15.7
论文数:
9.3W
被引数:
91.2W
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