Abstract
Additively manufactured (AM) three-dimensional (3D) mesostructures exhibit geometrically optimal mechanical, thermal, and optical properties that could drive future microrobotics, energy harvesting, and biosensing technologies at the micrometer to millimeter scale. We present a strategy for transforming AM mesostructures into 3D electronics by growing nanoscale conducting films on 3D-printed polymers. This highly generalizable method utilizes precision atomic layer deposition (ALD) of conducting metal oxides on ultrasmooth photopolymer lattices printed by high-resolution microstereolithography. We demonstrate control of 3D electronic transport by tuning conformal growth of ultrathin amorphous and crystalline conducting metal oxides. To understand the scaling of 3D electrical properties, we apply graph theory to compute network resistance and precisely design the 3D mesostructures' conductivity. Finally, we demonstrate 3D-enhanced multimodal sensing of chemical, thermal, and mechanical stimuli, geometrically boosting sensitivity by 100× over 2D films and enabling a new class of low-power, 3D-printable sensors.
Publication Date
2-25-2022
Publisher
Elsevier
Journal Title
Cell Reports Physical Science
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
Julia E. Huddy, Md Saifur Rahman, Andrew B. Hamlin, Youxiong Ye, William J. Scheideler, Transforming 3D-printed mesostructures into multimodal sensors with nanoscale conductive metal oxides, Cell Reports Physical Science, Volume 3, Issue 3, 2022, 100786, ISSN 2666-3864, https://doi.org/10.1016/j.xcrp.2022.100786.
Rights
© 2022 The Author(s).
Comments
This is an Open Access article published by Elsevier in Cell Reports Physical Science in 2022, available online: https://dx.doi.org/10.1016/j.xcrp.2022.100786