载钾多孔玻璃中基质-吸附质相互作用的光致改性
Photo-induced modifications of the substrate-adsorbate interaction in K-loaded porous glass
摘要：
研究了可见光和红外线对钾原子嵌入纳米多孔玻璃基质的影响。通过可见光的光脱附增强了原子的迁移率并导致金属纳米颗粒的形成。两个不同的亚稳态集群的吸收带在近红外和红外生长的照明的结果。原子可以通过在孔表面的吸附/脱附事件的序列在两组之间移动。相反，用红外线照射不会显著增强孔内的原子扩散。然而，它诱导相关的修改的基板，从而改变其与组装集群的相互作用。因此，红外线改变系统的动力学，甚至在照射序列之后也影响非共振纳米颗粒群的演变。这些结果提供了新的见解的光致修饰的基板-吸附质相互作用在纳米尺寸的限制系统。
英文摘要：
The effects of visible and infrared light on potassium atoms embedded in a nanoporous glass matrix are investigated. Photodesorption by visible light enhances the atomic mobility and causes the formation of metallic nanoparticles. Two different populations of metastable clusters with absorption bands in the near-infrared and infrared are grown as a consequence of illumination. Atoms can move between the two groups through sequences of adsorption/desorption events at the pore surface. Irradiation with infrared light, instead, does not significantly enhance the atomic diffusion inside the pores. However, it induces relevant modifications of the substrate, thus changing its interaction with the assembled clusters. Consequently, infrared light alters the dynamics of the system, affecting also the evolution of non-resonant nanoparticles populations, even after the illumination sequence. These results provide new insights on the photo-induced modifications of the substrate-adsorbate interaction in nano-sized confined systems.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
