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SUMMARY:MechE Colloquium: Electrochemically Active Metasurfaces for Multis
 pectral Radiative Heat Management
DTSTART:20240430T120000
DTEND:20240430T130000
DTSTAMP:20260407T100406Z
UID:f441f4f8ab4682fc324df0e00997bf3b3a1b8d1dc6ab8444c27392ab
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof Po-Chun Hsu\, University of Chicago\nAbstract: \n\nElect
 rochemistry is a powerful tuning knob for inducing drastic optical propert
 y changes. By applying an electrical bias while using counterions to maint
 ain charge neutrality\, electrochemistry can vary the carrier density or e
 ven trigger a phase transformation in an electrically addressable manner\,
  which is particularly desirable in many applications where tunable range\
 , scalability\, or non-volatility is crucial. Meanwhile\, metamaterials pr
 ovide additional degrees of freedom to boost performance and achieve multi
 functional control. However\, electrochemically active metasurfaces are st
 ill largely underexplored\, partly due to the lack of intrinsic property d
 atabases for newly developed materials. More co-development is needed amon
 g fundamental materials science\, metasurface design\, and electrochemical
  device engineering. In this talk\, I will present two types of electroche
 mically active materials: (i) Conducting polymers for near-perfect dynamic
  thermal emitter. We conducted infrared ellipsometry to measure the potent
 ial-dependent optical property and designed a tunable metal-dielectric-met
 al near-perfect absorber for wearable variable emittance (WeaVE) devices f
 or personal thermoregulation. (ii) Reversible metal electrodeposition for 
 multispectral solar and mid-infrared control. The potential\, electrolyte\
 , and interfacial properties dictate the metal morphology\, allowing rever
 sible switching between a solar adsorber and a radiative cooler for all-ye
 ar-round renewable thermoregulation for net-zero-energy buildings.\n\n\nBi
 ography: \n\nPo-Chun Hsu is an Assistant Professor at the Pritzker School
  of Molecular Engineering at the University of Chicago. He earned his PhD 
 degree in Materials Science and Engineering and was a postdoctoral researc
 her in Mechanical Engineering\, both at Stanford University. Prior to join
 ing the University of Chicago\, he was an Assistant Professor of Mechanica
 l Engineering and Materials Science at Duke University from 2019 to 2022. 
 He is a recipient of the NSF CAREER Award\, shortlist for the Falling Wall
 s Science Breakthrough of the Year 2023\, Ralph E. Powe Junior Faculty Enh
 ancement Awards\, MIT Technology Review Innovators Under 35 (China)\, Clar
 ivate Analytics Highly Cited Researchers\, and Sony Faculty Innovation Awa
 rd. His project in cooling textiles was selected as Top Ten World-Changing
  Ideas by Scientific American
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418 https://epf
 l.zoom.us/j/61626448592
STATUS:CONFIRMED
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