Inkless Microcontact Printing on Self-Assembled Monolayers of Fmoc-Protected Aminothiols

摘要

Originally developed by Whitesides and co-workers, microcontact printing (μCP) has become the method of choice for micro-and nanoscale fabrication of surfaces and nanoparticles. Despite its many advantages, several limitations remain, specifically (ⅰ) relatively high level of defects due to distortion and deformation of the elastomeric stamp, (ⅱ) a limited number of substrates and molecular inks, and (ⅲ) practical limits to feature sizes near 100-200 nm due to diffusion of molecular inks, both diffusive wetting of surfaces and diffusion of volatile inks through the gas phase.3 Recent efforts to circumvent these limitations include the replacement of liquid inks with solid analogues, the use of reactive polymers, and the subtraction of inks from flat PDMS stamps in the patterned area followed by printing of the remaining inks on a different substrate.