Windows are critically important components in building envelopes that have a signifcant efect on the integral energy budget.For energy saving,here we propose a novel design of hydrogel-glass which consists of a layer...Windows are critically important components in building envelopes that have a signifcant efect on the integral energy budget.For energy saving,here we propose a novel design of hydrogel-glass which consists of a layer of hydrogel and a layer of normal glass.Compared with traditional glass,the hydrogel-glass possesses a higher level of visible light transmission,stronger near-infrared light blocking,and higher mid-infrared thermal emittance.With these properties,hydrogel-glass based windows can enhance indoor illumination and reduce the temperature,reducing energy use for both lighting and cooling.Energy savings ranging from 2.37 to 10.45 MJ/m2 per year can be achieved for typical school buildings located in diferent cities around the world according to our simulations.With broadband light management covering the visible and thermal infrared regions of the spectrum,hydrogel-glass shows great potential for application in energy-saving windows.展开更多
Achieving multiband camouflage covering both visible and infrared regions is challenging due to the broad bandwidth and differentiated regulation demand in diverse regions.In this work,we propose a programmable microf...Achieving multiband camouflage covering both visible and infrared regions is challenging due to the broad bandwidth and differentiated regulation demand in diverse regions.In this work,we propose a programmable microfluidic strategy that uses dye molecules in layered fluids to manipulate visible light-and infrared-semitransparent solvent to manipulate infrared light.With three primary fluid inputs,we achieve 64 chromaticity values and 8 emissivities from 0.42 to 0.90.In view of the wide tuning range,we demonstrate that the microfluidic flm can dynamically change its surface reflectance to blend into varying backgrounds in both visible and infrared images.Moreover,we fabricate the microfluidic device in a textile form and demonstrate its ability to match exactly with the colors of natural leaves of different seasons in the full hyperspectrum range.Considering the broadband modulation and ease of operation,the programmable microfluidic strategy provides a feasible approach for smart optical surfaces in long-span optical spectra.展开更多
基金Acknowledgements K.L.acknowledges the National Natural Science Foundation of China(Grant No.51976141)Open Project Program of Wuhan National Laboratory for Optoelectronics(No.2018WNLOKF018)H.L.acknowledges the National Natural Science Foundation of China(Grant No.52002291).
文摘Windows are critically important components in building envelopes that have a signifcant efect on the integral energy budget.For energy saving,here we propose a novel design of hydrogel-glass which consists of a layer of hydrogel and a layer of normal glass.Compared with traditional glass,the hydrogel-glass possesses a higher level of visible light transmission,stronger near-infrared light blocking,and higher mid-infrared thermal emittance.With these properties,hydrogel-glass based windows can enhance indoor illumination and reduce the temperature,reducing energy use for both lighting and cooling.Energy savings ranging from 2.37 to 10.45 MJ/m2 per year can be achieved for typical school buildings located in diferent cities around the world according to our simulations.With broadband light management covering the visible and thermal infrared regions of the spectrum,hydrogel-glass shows great potential for application in energy-saving windows.
基金supported by the National Natural Science Foundation of China(62161160311,51976141,52002291)the Postdoctoral Innovation Talent Support Program(BX20190254).
文摘Achieving multiband camouflage covering both visible and infrared regions is challenging due to the broad bandwidth and differentiated regulation demand in diverse regions.In this work,we propose a programmable microfluidic strategy that uses dye molecules in layered fluids to manipulate visible light-and infrared-semitransparent solvent to manipulate infrared light.With three primary fluid inputs,we achieve 64 chromaticity values and 8 emissivities from 0.42 to 0.90.In view of the wide tuning range,we demonstrate that the microfluidic flm can dynamically change its surface reflectance to blend into varying backgrounds in both visible and infrared images.Moreover,we fabricate the microfluidic device in a textile form and demonstrate its ability to match exactly with the colors of natural leaves of different seasons in the full hyperspectrum range.Considering the broadband modulation and ease of operation,the programmable microfluidic strategy provides a feasible approach for smart optical surfaces in long-span optical spectra.
