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Title: Nanostructured fibers as a versatile photonic platform: radiative cooling and waveguiding through transverse Anderson localization

Broadband high reflectance in nature is often the result of randomly, three-dimensionally structured materials. This study explores unique optical properties associated with one-dimensional nanostructures discovered in silk cocoon fibers of the comet moth, Argema mittrei. The fibers are populated with a high density of air voids randomly distributed across the fiber cross-section but are invariant along the fiber. These filamentary air voids strongly scatter light in the solar spectrum. A single silk fiber measuring ~50 μm thick can reflect 66% of incoming solar radiation, and this, together with the fibers’ high emissivity of 0.88 in the mid-infrared range, allows the cocoon to act as an efficient radiative-cooling device. Drawing inspiration from these natural radiative-cooling fibers, biomimetic nanostructured fibers based on both regenerated silk fibroin and polyvinylidene difluoride are fabricated through wet spinning. Optical characterization shows that these fibers exhibit exceptional optical properties for radiative-cooling applications: nanostructured regenerated silk fibers provide a solar reflectivity of 0.73 and a thermal emissivity of 0.90, and nanostructured polyvinylidene difluoride fibers provide a solar reflectivity of 0.93 and a thermal emissivity of 0.91. The filamentary air voids lead to highly directional scattering, giving the fibers a highly reflective sheen, but more interestingly, they enable guidedmore » optical modes to propagate along the fibers through transverse Anderson localization. This discovery opens up the possibility of using wild silkmoth fibers as a biocompatible and bioresorbable material for optical signal and image transport.« less
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ; ORCiD logo [2] ;  [3] ; ORCiD logo [4] ;  [1] ;  [1]
  1. Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
  3. Harvard Univ., Cambridge, MA (United States). Museum of Comparative Zoology
  4. Univ. of Washington, Seattle, WA (United States). Dept. of Electrical Engineering
Publication Date:
Report Number(s):
BNL-211483-2019-JAAM
Journal ID: ISSN 2047-7538
Grant/Contract Number:
SC0012704; PHY-1411445; FA9550-14-1-0389; FA9550-16-1-0322
Type:
Accepted Manuscript
Journal Name:
Light, Science & Applications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2047-7538
Publisher:
Nature Publishing Group
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States); Columbia Univ., New York, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; metamaterials; nanophotonics and plasmonics
OSTI Identifier:
1504406

Shi, Norman Nan, Tsai, Cheng-Chia, Carter, Michael J., Mandal, Jyotirmoy, Overvig, Adam C., Sfeir, Matthew Y., Lu, Ming, Craig, Catherine L., Bernard, Gary D., Yang, Yuan, and Yu, Nanfang. Nanostructured fibers as a versatile photonic platform: radiative cooling and waveguiding through transverse Anderson localization. United States: N. p., Web. doi:10.1038/s41377-018-0033-x.
Shi, Norman Nan, Tsai, Cheng-Chia, Carter, Michael J., Mandal, Jyotirmoy, Overvig, Adam C., Sfeir, Matthew Y., Lu, Ming, Craig, Catherine L., Bernard, Gary D., Yang, Yuan, & Yu, Nanfang. Nanostructured fibers as a versatile photonic platform: radiative cooling and waveguiding through transverse Anderson localization. United States. doi:10.1038/s41377-018-0033-x.
Shi, Norman Nan, Tsai, Cheng-Chia, Carter, Michael J., Mandal, Jyotirmoy, Overvig, Adam C., Sfeir, Matthew Y., Lu, Ming, Craig, Catherine L., Bernard, Gary D., Yang, Yuan, and Yu, Nanfang. 2018. "Nanostructured fibers as a versatile photonic platform: radiative cooling and waveguiding through transverse Anderson localization". United States. doi:10.1038/s41377-018-0033-x. https://www.osti.gov/servlets/purl/1504406.
@article{osti_1504406,
title = {Nanostructured fibers as a versatile photonic platform: radiative cooling and waveguiding through transverse Anderson localization},
author = {Shi, Norman Nan and Tsai, Cheng-Chia and Carter, Michael J. and Mandal, Jyotirmoy and Overvig, Adam C. and Sfeir, Matthew Y. and Lu, Ming and Craig, Catherine L. and Bernard, Gary D. and Yang, Yuan and Yu, Nanfang},
abstractNote = {Broadband high reflectance in nature is often the result of randomly, three-dimensionally structured materials. This study explores unique optical properties associated with one-dimensional nanostructures discovered in silk cocoon fibers of the comet moth, Argema mittrei. The fibers are populated with a high density of air voids randomly distributed across the fiber cross-section but are invariant along the fiber. These filamentary air voids strongly scatter light in the solar spectrum. A single silk fiber measuring ~50 μm thick can reflect 66% of incoming solar radiation, and this, together with the fibers’ high emissivity of 0.88 in the mid-infrared range, allows the cocoon to act as an efficient radiative-cooling device. Drawing inspiration from these natural radiative-cooling fibers, biomimetic nanostructured fibers based on both regenerated silk fibroin and polyvinylidene difluoride are fabricated through wet spinning. Optical characterization shows that these fibers exhibit exceptional optical properties for radiative-cooling applications: nanostructured regenerated silk fibers provide a solar reflectivity of 0.73 and a thermal emissivity of 0.90, and nanostructured polyvinylidene difluoride fibers provide a solar reflectivity of 0.93 and a thermal emissivity of 0.91. The filamentary air voids lead to highly directional scattering, giving the fibers a highly reflective sheen, but more interestingly, they enable guided optical modes to propagate along the fibers through transverse Anderson localization. This discovery opens up the possibility of using wild silkmoth fibers as a biocompatible and bioresorbable material for optical signal and image transport.},
doi = {10.1038/s41377-018-0033-x},
journal = {Light, Science & Applications},
number = ,
volume = 7,
place = {United States},
year = {2018},
month = {7}
}

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Silk-based biomaterials
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A new route for silk
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