Optical properties of silver clusters and their complexes with biomolecules at surfaces

近年来，在氧化银薄膜的可见光照射下产生了光激活荧光。据推测，这一发现是由氧化银以光化学方式生成的银纳米团簇造成的。这些新发现的纳米颗粒的性质为光化学控制其荧光光谱特征提供了可能性。由氧化银产生的AgN光生产物可用于光存储材料以写入数据。在由氧化银产生的小银团簇中观察到的强烈的尺寸依赖荧光代表了并行读出和增加存储容量的潜力，这是由于来自不同团簇大小的颜色混合的可能性。造成这些现象的机制尚不清楚。本项目的目标是基于从头算理论方法，寻找控制银氧化物生成多色荧光银纳米团簇的机制。

Photoactivated fluorescence has been recently produced upon visible illumination of silver oxide films. It is assumed that the silver nanoclusters being photochemically generated from the silver oxide are responsible for this finding. Such newly identified properties of nanoparticles open the possibility to photochemically control their fluorescent spectral features. Agn photoproduction from silver oxide might be utilized in optical storage materials to write data. Observed strong size dependent fluorescence in small Ag clusters produced by silver oxide represents a potential for parallel readout and increased storage capacity due to the possibility of color mixing from different cluster sizes. The mechanisms responsible for these phenomena are not known. The goal of this project is to find mechanisms controlling the multicolored fluorescent Ag nanocluster creation from silver oxides based on ab initio theoretical approach.