摘要
利用兰州重离子加速器国家实验室电子回旋共振离子源(ECRIS)原子物理平台,观测了200nm金膜基底上的金纳米颗粒经288keV的40Ar12+离子束轰击后的熔化及再生长情况,通过原子力显微镜(AFM)表征和理论分析发现轰击后金纳米颗粒团簇首先熔化为单个金原子,然后自组装生成尺寸更大但尺寸不一的纳米颗粒,表明可在室温下控制纳米颗粒的尺寸。
Gold nanoparticles-clusters with cohesive energy 3.5eV of single particle on an average uniformity distributing on the surface of Au film with thickness 200nm was bombarded by slow highly charged ion 40Ar12＋ with energy 288keV, and detailed pictures were provided by AFM. As a result of the bombardment, the original nanoparticles were melted and assembled in new nanoparticles. They had different volumes and their size became larger than that of the original nanoparticles.
出处
《装备制造技术》
2007年第7期14-16,共3页
Equipment Manufacturing Technology
基金
国家自然科学基金资助项目(10405025
1057413)
关键词
金纳米颗粒
颗粒团簇
结合能
Gold nanoparticle
Nanoparticles-cluster
Cohesive energy
