DataVXAdvanced MaterialsPaper
journal article·2019-10Open access

Two in One: Light as a Tool for 3D Printing and Erasing at the Microscale

Rhiannon Batchelor, Tobias Messer, Marc Hippler, Martin Wegener, Christopher Barner‐Kowollik, Eva Blasco

Advanced Materials· Volume 31· Issue 40
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Source abstract

Abstract

Abstract The ability to selectively remove sections from 3D‐printed structures with high resolution remains a current challenge in 3D laser lithography. A novel photoresist is introduced to enable the additive fabrication of 3D microstructures at one wavelength and subsequent spatially controlled cleavage of the printed resist at another wavelength. The photoresist is composed of a difunctional acrylate cross‐linker containing a photolabile o‐nitrobenzyl ether moiety. 3D microstructures are written by photoinduced radical polymerization of acrylates using Ivocerin as photoinitiator upon exposure to 900 nm laser light. Subsequent scanning using a laser at 700 nm wavelength allows for the selective removal of the resist by photocleaving the o‐nitrobenzyl group. Both steps rely on two‐photon absorption. The fabricated and erased features are imaged using scanning electron microscopy (SEM) and laser scanning microscopy (LSM). In addition, a single wire bond is successfully eliminated from an array, proving the possibility of complete or partial removal of structures on demand.
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Research context

PolymersMaterials processing

OpenAlex topics: Photochromic and Fluorescence Chemistry · Nonlinear Optical Materials Studies · Nanofabrication and Lithography Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Macromolecular Architectures Institute for Chemical Technology and Polymer Chemistry (ITCP) Karlsruhe Institute of Technology (KIT) Engesserstrasse 18 76131 Karlsruhe Germany

Institute of Applied Physics (APH) Karlsruhe Institute of Technology (KIT) Wolfgang‐Gaede‐Strasse 1 76131 Karlsruhe Germany

Zoological Institute Karlsruhe Institute of Technology (KIT) Fritz‐Haber‐Weg 4 76131 Karlsruhe Germany

Institute of Nanotechnology (INT) Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany

School of Chemistry Physics and Mechanical Engineering Queensland University of Technology (QUT) 2 George St. 4000 Brisbane Queensland Australia

Funding

Deutsche Forschungsgemeinschaft · Carl-Zeiss-Stiftung · Australian Research Council · Queensland University of Technology

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