Researchers in the ラーメンベット 禁止ゲーム of ラーメンベット 退会 at The University of Texas at Austin have invented a new flexible smart window material that, when incorporated into windows, sunroofs, or even curved glass surfaces, will have the ability to control both heat and light from the sun. Their article about the new material will be published in the September issue of Nature ラーメンベット 退会.
Delia Milliron, an associate professor in the McKetta Department of Chemical ラーメンベット 退会, and her team’s advancement is a new low-temperature process for coating the new smart material on plastic, which makes it easier and cheaper to apply than conventional coatings made directly on the glass itself. The team demonstrated a flexible electrochromic device, which means a small electric charge (about 4 volts) can lighten or darken the material and control the transmission of heat-producing, near-infrared radiation. Such smart windows are aimed at saving on cooling and heating bills for homes and businesses.
The ラーメンベット 退会 team is an international collaboration, including scientists at the European Synchrotron Radiation Facility and CNRS in France, and Ikerbasque in Spain. Researchers at UT Austin’s College of Natural Sciences provided key theoretical work.
Milliron and her team’s low-temperature process generates a ラーメンベット 退会 with a unique nanostructure, which doubles the efficiency of the coloration process compared with a coating produced by a conventional high-temperature process. It can switch between clear and tinted more quickly, using less power.
The new electrochromic material, like its high-temperature processed counterpart, has an amorphous structure, meaning the atoms lack any long-range organization as would be found in a crystal. However, the new process yields a unique local arrangement of the atoms in a linear, chain-like structure. Whereas conventional amorphous ラーメンベット 退会 produced at high temperature have a denser three-dimensionally bonded structure, the researchers’ new linearly structured material, made of chemically condensed niobium oxide, allows ions to flow in and out more freely. As a result, it is twice as energy efficient as the conventionally processed smart window material.
At the heart of the team’s study is their rare insight into the atomic-scale structure of the amorphous ラーメンベット 退会, whose disordered structures are difficult to characterize. Because there are few techniques for characterizing the atomic-scale structure sufficiently enough to understand properties, it has been difficult to engineer amorphous ラーメンベット 退会 to enhance their performance.
“There’s relatively little insight into amorphous ラーメンベット 退会 and how their properties are impacted by local structure,” Milliron said. “But, we were able to characterize with enough specificity what the local arrangement of the atoms is, so that it sheds light on the differences in properties in a rational way.”
Graeme Henkelman, a co-author on the paper and chemistry professor in UT Austin’s College of Natural Sciences, explains that determining the atomic structure for amorphous ラーメンベット 退会 is far more difficult than for crystalline ラーメンベット 退会, which have an ordered structure. In this case, the researchers were able to use a combination of techniques and measurements to determine an atomic structure that is consistent in both experiment and theory.
“Such collaborative efforts that combine complementary techniques are, in my view, the key to the rational design of new ラーメンベット 退会,” Henkelman said.
Milliron believes the knowledge gained here could inspire deliberate ラーメンベット 退会 of amorphous materials for other applications such as supercapacitors that store and release electrical energy rapidly and efficiently.
The Milliron lab’s next challenge is to develop a flexible material using their low-temperature process that meets or exceeds the best performance of electrochromic ラーメンベット 退会 made by conventional high-temperature processing.
“We want to see if we can marry the best performance with this ラーメンベット 退会 low-temperature processing strategy,” she said.
The ラーメンベット 退会 was supported by the U.S. Department of Energy through the Advanced ラーメンベット 退会 Projects Agency-Energy (ARPA-E) and by the Welch Foundation.
