Electron Beam Manipulation of Nanoparticles

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• 作者：Haimei Zheng ; Utkur M. Mirsaidov ; Lin-Wang Wang ; Paul Matsudaira
• 刊名：Nano Letters
• 出版年：2012
• 出版时间：November 14, 2012
• 年：2012
• 卷：12
• 期：11
• 页码：5644-5648
• 全文大小：329K
• 年卷期：v.12,no.11(November 14, 2012)
• ISSN：1530-6992

文摘

We report on electron beam manipulation and simultaneous transmission electron microscopy imaging of gold nanoparticle movements in an environmental cell. Nanoparticles are trapped with the beam and move dynamically toward the location with higher electron density. Their global movements follow the beam positions. Analysis on the trajectories of nanoparticle movements inside the beam reveals a trapping force in the piconewton range at the electron density gradient of 10³鈥?0⁴ (e路nm^鈥?路s^鈥?)路nm^鈥?. Multiple nanoparticles can also be trapped with the beam. By rapidly converging the beam, we further can 鈥渃ollect鈥?nanoparticles on the membrane surface and assemble them into a cluster.

Keywords:

Electron beam trap; nanoscale manipulation; liquid cell; TEM; nanoparticle interaction; directed assembly