Templated Self-Assembly of Colloidal Nanoparticles Controlled by Electrostatic Nanopatterning on a Si3N4/SiO2/Si Electret


  • This work was supported by the National Nanoscience and Nanotechnology Project (NSC 94-2120-M-007-002). We thank J.-L. Hsieh of Nano Device Laboratory (NDL) for the supply of NOS samples. Supporting Information is available online from Wiley InterScience or from the author.


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Controlled self-assembly of colloidal nanoparticles onto an electrically nanopatterned electret film is presented (see figure; EFM: electrostatic force microscopy). An unprecedented reolution of 30 nm is achieved for both charge patterning and nanoparticle assembly. Furthermore, only a close-packed monolayer of nanoparticles is assembled, allowing better structural control and the possibility of forming hierarchical nanoparticle structures.