The news correspondents obtained a quote from the research, "In this study, patterned poly dimethylsiloxane (PDMS) surfaces with hexagonal close-packed microwells were fabricated by the self-assembly of silicon spheres (5 mu m and 800 nm) onto the polymer surface. The weight of spheres, in combination with uncompleted curing of the polymer, allows surface deformation. An average depth for microwells after 48 hours curing and a further 48 hours of bead resting time was similar to 400 nm for 5 mu m beads and similar to 100 nm for 800 nm beads. An increased curing time pre bead placement on the polymer surface was found to show a decrease in the depth of the microwells (for 5 mu m spheres, a 400 to 45 nm well depth decrease, at 2 to 9 days curing, respectively). Young's Modulus values measured on the polymer over this period increased from ca. 650 kPa to ca. 750 kPa."
According to the news reporters, the research concluded: "Microwell depth was found to increase from 400 to over 500 nm for resting times of 3 and 15 days (an increase of ca. 28% for this period)."
For more information on this research see: Microwell Depth Control on a Polydimethylsiloxane Polymer Using a Simple Colloidal Self Assembly Process. Science of Advanced Materials, 2014;6(7):1351-1355. Science of Advanced Materials can be contacted at:
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