Luxembourg Institute of Science and Technology (LIST) , 5 avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg.
CIRIMAT , ENSIACET-4 allée E. Monso, 31030 Toulouse, France.
ACS Appl Mater Interfaces. 2017 Jun 28;9(25):21447-21456. doi: 10.1021/acsami.7b04484. Epub 2017 Jun 14.
Although di-vanadium pentoxide (VO) has been a candidate of extensive research for over half a century, its intrinsic thermochromism has not been reported so far. Films of VO grown on silicon, glass, and metal substrates by metal organic chemical vapor deposition in this study exhibit a thermally induced perceptible color change from bright yellow to deep orange. Temperature-dependent UV-vis spectroscopy and X-ray diffraction allow the correlation between the reversible continuous red shift of the absorption and the anisotropic thermal expansion along the (001) direction, that is, perpendicular to the sheets constituting the layered structure. Furthermore, the possibility of tuning the thermochromic behavior was demonstrated via a chemical doping with chromium.
虽然二钒五氧化物（VO）作为一个研究对象已经有半个多世纪了，但它的内在热致变色性至今仍未被报道。本研究采用金属有机化学气相沉积法在硅、玻璃和金属衬底上生长的 VO 薄膜表现出从亮黄色到深橙色的热诱导可感知颜色变化。温度相关的紫外-可见光谱和 X 射线衍射允许在吸收的可逆连续红移和沿（001）方向的各向异性热膨胀之间建立相关性，即垂直于构成层状结构的薄片。此外，通过用铬进行化学掺杂，展示了调节热致变色行为的可能性。
