@article{68b8a4ee48ef461298d1537e49316661,
title = "Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling",
abstract = "Passive daytime radiative cooling (PDRC) involves spontaneously cooling a surface by reflecting sunlight and radiating heat to the cold outer space. Current PDRC designs are promising alternatives to electrical cooling but are either inefficient or have limited applicability.We present a simple, inexpensive, and scalable phase inversion-based method for fabricating hierarchically porous poly(vinylidene fluoride-co-hexafluoropropene) [P(VdF-HFP)HP] coatings with excellent PDRC capability. High, substrate-independent hemispherical solar reflectances (0.96 ± 0.03) and long-wave infrared emittances (0.97 ± 0.02) allow for subambient temperature drops of ∼6°C and cooling powers of ∼96 watts per square meter (Wm-2) under solar intensities of 890 and 750 Wm-2, respectively.The performance equals or surpasses those of state-ofthe-art PDRC designs, and the technique offers a paint-like simplicity.",
author = "Jyotirmoy Mandal and Yanke Fu and Overvig, {Adam C.} and Mingxin Jia and Kerui Sun and Shi, {Norman N.} and Hua Zhou and Xianghui Xiao and Nanfang Yu and Yuan Yang",
note = "Funding Information: This work was supported by startup funding from Columbia University, the NSF MRSEC program through Columbia University's Center for Precision Assembly of Superstratic and Superatomic Solids (Y.Y. DMR-1420634), AFOSR (Y.Y. grant no. FA9550-18-1-0410), AFOSR MURI (Multidisciplinary University Research Initiative) program (N.Y. grant no. FA9550-14-1-0389), AFOSR DURIP (Defense University Research Instrumentation Program) (N.Y. grant no. FA9550-16-1-0322), and the National Science Foundation (N.Y. grant no. ECCS-1307948). A.C.O. acknowledges support from the NSF IGERT program (no. DGE-1069240). We acknowledge support from the Advanced Photon Source in Argonne National Laboratory (under Contract no. DE-AC02-06CH11357). This research used resources of the Full-Field X-ray Imaging Beamline (FXI) at 18-ID of the National Synchrotron Light Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under contract no. DE-AC02-98CH10886. Publisher Copyright: {\textcopyright} 2017 The Authors.",
year = "2018",
month = oct,
day = "19",
doi = "10.1126/science.aat9513",
language = "English (US)",
volume = "362",
pages = "315--319",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "6412",
}