In Dip Pen Nanolithography® (DPN®), ink transport is reported to occur through the water meniscus formed between
the AFM tip and the substrate by capillary condensation. It is imperative to understand the ink transport mechanisms in
order to develop reliable commercial applications of DPN, and NanoInk is at the forefront of these efforts. In this work,
we model the dot patterns of 16-Mercaptohexadecanoic acid (MHA) created by evaporative coating of a 1D 18
cantilever array and perform predictive modeling with solution based MHA cantilever inking results. We extend the
functionality of the NanoInk 2D nano PrintArrayTM (2D array) by measuring the uniformity of 1-octadenethiol (ODT)
dot patterns created. Further, we try to quantify the uniformity of patterns created by the 2D array, in a more statistically
quantitative way. We do this by measuring the dot diameters of over 200 ODT ink patterns over a 1x1cm2 area and
examining the uniformity of the ODT vapor inking protocol developed.
X-ray absorption measurements at the L-edge in chemically prepared Germanium nanoclusters show a blue shift of the conduction band edge consistent with quantum confinement theory. Additionally the effects of the surface termination on the electronic properties are probed with x-ray absorption processes.
We used a combination of dip-pen nanolithography and scanning optical confocal microscopy to fabricate and visualize luminescent nanoscale patterns of various materials on glass substrates. We show that this method can be used successfully to push the limits of dip-pen nanolithography down to controlled deposition of single molecules. We also demonstrate that this method is able to create and visualize protein patterns on surfaces. Finally, we show that our method can be used to fabricate polymer nanowires of controlled size using conductive polymers. We also present a kinetic model that accurately describes the deposition process.
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