Transmission electron microscope observation of a freestanding nanocrystal in a Coulomb potential well

Usually pure electrostatic charges cannot be utilized alone to form macro-sized three-dimensional electromagnetic traps for trapping charged particles. These traps need additional dynamic electromagnetic fields. We report here the observation of a CdSe nanocrystal floating over a carbon film in a tr...

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Bibliographic Details
Published in:Nanoscale 2010-02, Vol.2 (2), p.248-253
Main Authors: Xu, Sheng-Yong, Sun, Wei-Qiang, Zhang, Meng, Xu, Jian, Peng, Lian-Mao
Format: Article
Language:English
Subjects:
Cadmium Compounds - chemistry
Coulomb potential
Electron microscopes
Microscopy, Electron, Transmission
Nanocomposites
Nanocrystals
Nanomaterials
Nanoparticles - chemistry
Nanostructure
Selenium Compounds - chemistry
Static Electricity
Three dimensional
Trapping
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Summary:Usually pure electrostatic charges cannot be utilized alone to form macro-sized three-dimensional electromagnetic traps for trapping charged particles. These traps need additional dynamic electromagnetic fields. We report here the observation of a CdSe nanocrystal floating over a carbon film in a transmission electron microscope. The nanocrystal was most likely trapped in a naturally formed, nanometre-sized 3D Coulomb potential well. The results indicated the possibility of developing a novel nanodevice for the trapping and manipulation of charged nanoparticles.
ISSN:2040-3364
2040-3372
DOI:10.1039/b9nr00144a