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Updated: Jul 20, 2026

Transport of Surface-modified Carbon Nanotubes through a Soil Column
Published on: April 2, 2015
Transport at the air/water interface is the reason for rings in protein microarrays
Yang Deng1, X-Y Zhu, Taryn Kienlen
1Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USA.
Abstract:
Fabricating a protein microarray involves the deposition of nanoliter droplets of solutions on a solid surface. Instead of uniform spots, one often observes ring-like structures that add to the difficulty in quantification. We show that the accumulation of proteins at the air/water interface of the nanodroplet is the reason. Transformation to a uniform spot can be achieved via the addition of competitive surfactants or the control of surface reaction kinetics.
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