Multifunctional shape-memory smart window based on femtosecond-laser-printed photothermal microwalls  

作　　者：Chao Chen Sijia Guo Long Zhang Hao Yao Bingrui Liu Chenchu Zhang Yachao Zhang Zhaoxin Lao Sizhu Wu Dong Wu 

机构地区：[1]Department of Materials Physics and New Energy Device,School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,People’s Republic of China [2]Department of Environmental Science and Engineering,School of Resources and Environment,Anhui Agricultural University,Hefei 230036,People’s Republic of China [3]Institute of Industry and Equipment Technology,Hefei University of Technology,Hefei 230009,People’s Republic of China [4]School of Instrument Science and Opto-Electronics Engineering,Hefei University of Technology,Hefei 230009,People’s Republic of China [5]Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China,Hefei 230026,People’s Republic of China

出　　处：《International Journal of Extreme Manufacturing》2025年第1期567-578,共12页极端制造(英文)

基　　金：supported by the National Natural Science Foundation of China(No.52005475,62305321);the Natural Science Foundation of Anhui Province(No.JZ2024AKZR0561,2308085QE167);Opening Project of the Key Laboratory of Bionic Engineering(Ministry of Education),Jilin University(K202204).

摘　　要：Smart windows(SWs)garner significant potential in green buildings owing to their capability of on-demand tuning the solar gains.Apart from solar regulation,people always desire a type of slippery SW which can repel the surface hydrous contaminants for anti-fouling application.Unfortunately,the up-to-date slippery SWs that respond to electrical/thermal stimuli have drawbacks of inferior durability and high energy-consumption,which greatly constrain their practical usability.This article presents our current work on an ultra-robust and energy-efficient near-infrared-responsive smart window(NIR-SW)which can regulate the optical transmittance and droplet’s adhesion in synergy.Significantly,laser-printing strategy enables us to seed the shape-memory photothermal microwalls on a transparent substrate,which can promote daylighting while maintaining privacy by near-infrared(NIR)switching between being transparent and opaque.As a light manipulator,it turns transparent with NIR-activated erect microwalls like an open louver;however,it turns opaque with the pressure-fixed bent microwalls akin to a closed louver.Simultaneously,the droplets can easily slip on the surface of erect microwalls similar to a classical lotus effect;by contrast,the droplets will tightly pin on the surface of bent microwalls analogous to the prevalent rose effect.Owing to shape-memory effect,this optical/wettability regulation is thus reversible and reconfigurable in response to the alternate NIR/pressure trigger.Moreover,NIR-SW unfolds a superior longevity despite suffering from the raindrop’s impacting more than 10000 cycles.Remarkably,such a new-type SW is competent for thermal management,anti-icing system,peep-proof screen,and programmable optics.This work renders impetus for the researchers striving for self-cleaning intelligent windows,energy-efficient greenhouse,and so forth.

关 键 词：femtosecond laser slippery surface photothermal microwalls controllable wettability switchable transparency 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]