R. Resch, C. Baur, A. Bugacov, B. E. Koel, A. Madhukar, A. A. G. Requicha and P. Will, "Building and manipulating 3-D and linked 2-D structures of nanoparticles using scanning force microscopy ", Langmuir, Vol. 14, No. 23, pp. 6613-6616, November 1998.

Description:

Using the tip of a scanning probe microscope researchers are able to push nanoparticles into more complex assemblies.  They can even push one nanoparticle onto another, making small 3D structures such as this pyramid-like structure.  It was formed by pushing a 30 nm nanoparticle up between two others. The nanoparticle is now elevated about 20 nm sitting on top of the others

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