Painting with nanoplates

Gold nanoplates from the O'Toole group are attached to a silicon dioxide surface in a microscale pattern.

Gold nanoplates from the O’Toole group are attached to a silicon dioxide surface in a microscale pattern.

We recently developed a microfluidic method for patterning light-absorbing nanomaterials on MEMS (microelectromechanical systems). The technique relies on a chemical bond between the surface and nanoplates from the O’Toole group, plus microfluidic channels to control where the nanoplates go. Figures (a) through (d) are electron microscope images at various size scales, and figure (e) shows an optical microscope image of the patterned nanoplates trapped under a polymer layer. This method is capable of patterning different types of nanoplates side-by-side. We’ll add it to the other nanoparticle-patterning methods in the lab, including stenciling, etching, inkjet printing, stamping and electron beam lithography.

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