Guo Min, Yu Qiaoqi, Wang Xingchi, Xu Wanxuan, Wei Yi, Ma Ying, Yu Jianyong, Ding Bin
Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China.
Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China.
ACS Appl Mater Interfaces. 2021 Feb 3;13(4):5634-5644. doi: 10.1021/acsami.0c21584. Epub 2021 Jan 19.
Controlling solar transmission through windows promises to reduce building energy consumption. A new smart window for adaptive solar modulation is presented in this work proposing the combination of the photothermal one-dimensional (1D) Au nanochains and thermochromic hydrogel. In this adaptive solar modulation system, the Au nanochains act as photoresponsive nanoheaters to stimulate the optical switching of the thermochromic hydrogel. By carefully adjusting the electrostatic interactions between nanoparticles, different chain morphologies and plateau-like broad-band absorption in the NIR region are achieved. Such broad-band-absorbed 1D nanochains possess excellent thermoplasmonic effect and enable the solar modulation with compelling features of improved NIR light shielding, high initial visible transmittance, and fast response speed. The designed smart window based on 1D Au nanochains is capable of shielding 94.1% of the solar irradiation from 300 to 2500 nm and permitting 71.2% of visible light before the optical switching for indoor visual comfort. In addition, outdoor cooling tests in model house under continuous natural solar irradiation reveal the remarkable passive cooling performance up to ∼7.8 °C for the smart window based on 1D Au nanochains, showing its potential in the practical application of building energy saving.
控制窗户的太阳辐射有望降低建筑能耗。本文介绍了一种用于自适应太阳调制的新型智能窗户，它将光热一维（1D）金纳米链与热致变色水凝胶相结合。在这个自适应太阳调制系统中，金纳米链充当光响应纳米加热器，以刺激热致变色水凝胶的光学开关。通过仔细调整纳米颗粒之间的静电相互作用，实现了不同的链形态和近红外区域的平台状宽带吸收。这种宽带吸收的一维纳米链具有优异的热等离子体效应，并能够实现具有改善的近红外光屏蔽、高初始可见光透射率和快速响应速度等引人注目的特征的太阳调制。基于一维金纳米链设计的智能窗户能够屏蔽300至2500nm太阳辐射的94.1%，并在光学开关前允许71.2%的可见光透过，以实现室内视觉舒适度。此外，在连续自然太阳辐射下对模型房屋进行的室外冷却测试表明，基于一维金纳米链的智能窗户具有高达约7.8°C的显著被动冷却性能，显示出其在建筑节能实际应用中的潜力。
