GTR seminar
Speaker: Prof. Mitchell Anthamatten（University of Rochester, NY, USA）
Title: "3D-Printed Shape-Memory Polymers for Switchable Adhesion"
Date：Nov.9th(Mon.),2026,15:30～17:00
Venue：Room 143, 4th Floor, Engineering Building No. 1
Host：Atsushi NORO（ex：4587）
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Abstract:
Microscale, pick-and-place assembly is a non-lithographic assembly method poised to impact diverse fields including flexible electronics, microfluidics and robotics. However, a major technological challenge is the need to deterministically control adhesion between parts. Here, switchable adhesion involving 3D-printed, self-complementary surfaces is demonstrated. Mechanical properties of metasurfaces pressed against flat, rigid substrates are modeled using finite element methods. A series of flat slabs and metastructured slabs with 2D sinusoidal surfaces are printed using two-photon polymerization of a shape-memory resin. The surface frequency of featured slabs was varied between 3.3
mm-1 and 26.6 mm-1 with similar amplitudes. Adhesion between printed metasurfaces and glass and between printed, self-complementary metasurfaces is studied above and below the cured resin's glass transition temperature (~45 °C). Simple heating of adhering surfaces to above 60 °C lowers adhesion, and compression of surfaces while above the glass transition followed by cooling to room temperature elevates adhesion. The nominal adhesive strength between printed, self-complementary surfaces, as determined by the maximum observable pull-off stress, exceeds 3 MPa. Further tailoring complementary surfaces for adhesion control may facilitate microscale disassembly for recovery of components or precious metals.
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