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. Author manuscript; available in PMC: 2014 May 7.
Published in final edited form as: Adv Mater. 2013 Mar 11;25(17):2409–2414. doi: 10.1002/adma.201204678

Figure 4. Conformal PiP and surface transfer.

Figure 4

(a) Modification to the PiP process for conformal imprint, showing the addition of non-planar aluminum tool (gray) for homogenous pressure application normal to the imprinting surface. (b) Lens characteristics, 9.8 mm radius of curvature, 15 mm diameter. Inset: Imprinted lens, using optimized PiP method. (c) Transfer of film imprinted on lens to skin as example curved biological surface (scale bar 4 mm). Inset: change in colorimetric response of the imprinted film with the addition of ethanol to the surface (scale bars 1 mm). (d) AFM topology of conformal PiP imprint, with dashed line corresponding to cross-section Scale bar 5μm. (e) AFM cross-section of conformal imprint, showing good pattern replication across all dimensions.