论文标题
光谱镜和电子显微镜揭示了第一批彩色照片的起源
Spectroscopies and electron microscopies unravel the origin of the first colour photographs
论文作者
论文摘要
第一批颜色的照片是由Edmond Becquerel在1848年推出的过程创建的。这些光色图像的性质激发了19世纪科学家之间的辩论，但仍未解决。我们介绍了旨在解释光色图像的光学特性（紫外可见光谱和低损耗鳗）的化学分析（EDX，HAXPES和EXAFS）和形态研究（SEM，STEM）的结果。我们排除了自1848年以来盛行的两个假设（色素和干扰），分别基于形成敏化层和周期间隔的光解银平面的化合物的氧化度变化。对彩色层中包含的银纳米颗粒分散体的研究表明，每种颜色的纳米颗粒的特定局部定位和尺寸分布。这些结果使我们能够在光色图像颜色的起源上制定等离子假设。
The first colours photographs were created by a process introduced by Edmond Becquerel in 1848. The nature of these photochromatic images colours motivated a debate between scientists during the 19th century, which is still not settled. We present the results of chemical analysis (EDX, HAXPES and EXAFS) and morphology studies (SEM, STEM) aiming at explaining the optical properties of the photochromatic images (UV-visible spectroscopy and low loss EELS). We rule out the two hypotheses (pigment and interferences) that have prevailed since 1848, respectively based on variations in the oxidation degree of the compound forming the sensitized layer and periodically spaced photolytic silver planes. A study of the silver nanoparticles dispersions contained in the coloured layers showed specific localizations and size distributions of the nanoparticles for each colour. These results allow us to formulate a plasmonic hypothesis on the origin of the photochromatic images colours.
