Journal
SCIENCE
Volume 378, Issue 6622, Pages 894-898Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.add7023
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Funding
- National Institute of Standards and Technology (NIST)
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A microtransfer approach using reflowable materials has been developed to transfer micropatterns onto nonplanar surfaces. This method can be applied to a range of materials and enables microprinting on highly nonplanar substrates and microstructures.
From microcircuits to metamaterials, the micropatterning of surfaces adds valuable functionality. For nonplanar surfaces, incompatibility with conventional microlithography requires the transfer of originally planar micropatterns onto those surfaces; however, existing approaches accommodate only limited curvatures. A microtransfer approach was developed using reflowable materials that transform between solid and liquid on demand, freely stretching to yield transfers that naturally conform down to nanoscale radii of curvature and arbitrarily complex topographies. Such reflow transfer helps generalize microprinting, extending the reach of precision planar microlithography to highly nonplanar substrates and microstructures. With gentle water- based processing, reflow transfer can be applied to a range of materials, with microprinting demonstrated onto metal, plastic, paper, glass, polystyrene, semiconductor, elastomer, hydrogel, and multiple biological surfaces.
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