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High Resolution Patterning of an Organic–Inorganic Photoresin for the Fabrication of Platinum Microstructures
Author(s) -
Luitz Manuel,
Lunzer Markus,
Goralczyk Andreas,
Mader Markus,
Bhagwat Sagar,
Warmbold Andreas,
Helmer Dorothea,
Kotz Frederik,
Rapp Bastian E.
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202101992
Subject(s) - materials science , platinum , lithography , nanotechnology , fabrication , photonics , microfabrication , photolithography , electronics , microheater , optoelectronics , catalysis , medicine , biochemistry , chemistry , alternative medicine , pathology
Platinum (Pt) is an interesting material for many applications due to its high chemical resilience, outstanding catalytic activity, high electrical conductivity, and high melting point. However, microstructuring and especially 3D microstructuring of platinum is a complex process, based on expensive and specialized equipment often suffering from very slow processing speeds. In this work, organic–inorganic photoresins, which can be structured using direct optical lithography as well as two‐photon lithography (TPL) with submicrometer resolution and high‐throughput is presented. The printed structures are subsequently converted to high‐purity platinum using thermal debinding of the binder and reduction of the salt. With this technique, complex 3D structures with a 3D resolution of 300 nm were fabricated. At a layer thickness of 35 nm, the patterns reach a high conductivity of 67% compared to bulk platinum. Microheaters, thermocouple sensors as well as a Lab‐on‐a‐Chip system are presented as exemplary applications. This technology will enable a broad range of application from electronics, sensing and heating elements to 3D photonics and metamaterials.