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Fingerprint Acquisition Based on Photo‐Thermal Coloration of MoO3 Ceramic upon the Irradiation of Multiband Light outside the Bandgap
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-09-06 , DOI: 10.1002/admt.202000562 Mingjun Li 1, 2 , Zhengwen Yang 2 , Yugeng Wen 2 , Jiufeng Ruan 2 , Youtao Ren 2 , Jianbei Qiu 2 , Zhiguo Song 2 , Yuehui Wang 3 , Bitao Liu 1
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-09-06 , DOI: 10.1002/admt.202000562 Mingjun Li 1, 2 , Zhengwen Yang 2 , Yugeng Wen 2 , Jiufeng Ruan 2 , Youtao Ren 2 , Jianbei Qiu 2 , Zhiguo Song 2 , Yuehui Wang 3 , Bitao Liu 1
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Fingerprints acquisition for identity recognition is extensively studied as a high requirement of the development of fingerprint acquisition technology. The photochromism of MoO3 is widely reported upon ultraviolet light irradiation inside the bandgap, and if the photochromism can be achieved outside the bandgap, then the discoloration adjustment can be more diversified and the application range will be wider. However, there are no report of the photochromism of MoO3 upon the irradiation of multiband light outside bandgap. Herein, the MoO3 ceramic is prepared by the solid‐state reaction, and its photochromism is investigated upon the irradiation of multiband light outside the bandgap. The colors of MoO3 ceramic change from grey to dark blue upon the 473, 532, 808, or 980 nm laser irradiation, and the dark blue of MoO3 ceramic is bleached upon thermal stimulation. The photochromic mechanism of MoO3 ceramic is attributed to the laser‐induced heat effect. For the first time, fingerprint acquisition is obtained by means of the photo‐thermal‐chromism of MoO3 ceramic. The cycle experiment demonstrates that the fingerprint acquisition based on the photo‐thermal‐chromism of MoO3 has excellent repeatability and stability. These results suggest that this technology is nondestructive and repeatable, opening up a new approach for fingerprint acquisition.
中文翻译：
基于带隙外多波段光辐照下MoO3陶瓷光热着色的指纹采集
作为身份获取技术发展的高要求，对身份识别的指纹获取进行了广泛的研究。MoO 3的光致变色在带隙内部被紫外线照射时被广泛报道，并且如果能够在带隙之外实现光致变色，则变色调节可以更加多样化并且应用范围将更宽。然而，没有关于在带隙外照射多频带光时MoO 3的光致变色的报道。在这里，MoO 3陶瓷是通过固相反应制备的，其光致变色现象是通过在带隙外照射多波段光来研究的。MoO 3的颜色陶瓷在473、532、808或980 nm激光照射下从灰色变为深蓝色，而MoO 3陶瓷的深蓝色在热刺激下被漂白。MoO 3陶瓷的光致变色机理归因于激光诱导的热效应。首次通过MoO 3陶瓷的光热致变色获得指纹。循环实验表明，基于MoO 3的光热色变的指纹采集具有出色的可重复性和稳定性。这些结果表明该技术是无损的和可重复的，为指纹采集开辟了一种新方法。
更新日期：2020-11-12
中文翻译：
基于带隙外多波段光辐照下MoO3陶瓷光热着色的指纹采集
作为身份获取技术发展的高要求，对身份识别的指纹获取进行了广泛的研究。MoO 3的光致变色在带隙内部被紫外线照射时被广泛报道，并且如果能够在带隙之外实现光致变色，则变色调节可以更加多样化并且应用范围将更宽。然而，没有关于在带隙外照射多频带光时MoO 3的光致变色的报道。在这里，MoO 3陶瓷是通过固相反应制备的，其光致变色现象是通过在带隙外照射多波段光来研究的。MoO 3的颜色陶瓷在473、532、808或980 nm激光照射下从灰色变为深蓝色，而MoO 3陶瓷的深蓝色在热刺激下被漂白。MoO 3陶瓷的光致变色机理归因于激光诱导的热效应。首次通过MoO 3陶瓷的光热致变色获得指纹。循环实验表明，基于MoO 3的光热色变的指纹采集具有出色的可重复性和稳定性。这些结果表明该技术是无损的和可重复的，为指纹采集开辟了一种新方法。
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