Customizable and highly sensitive 3D micro-springs produced by two-photon polymerizations with improved post-treatment processes

Springs are ubiquitous in a variety of scientific and engineering fields. However, the comprehensive study on mechanical properties of micro-spring has not been fully conducted yet due to a lack of reliable productions of varied-shaped micro-springs. Here, we report the design and manufacturing of t...

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Bibliographic Details
Published in:Applied physics letters 2022-04, Vol.120 (17)
Main Authors: Shang, Xinggang, Wang, Ning, Wang, Zimeng, Jiang, Hanqing, Jia, Yunfei, Zhou, Nanjia, Qiu, Min
Format: Article
Language:English
Subjects:
Applied physics
Compression tests
Helical springs
Mechanical properties
Photons
Polymerization
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Summary:Springs are ubiquitous in a variety of scientific and engineering fields. However, the comprehensive study on mechanical properties of micro-spring has not been fully conducted yet due to a lack of reliable productions of varied-shaped micro-springs. Here, we report the design and manufacturing of triple-helix-shaped springs employing two-photon polymerization (TPP) technologies and present a systemic study on the mechanical properties of micro-springs particularly involving spring constants of k. To construct high-quality hollow microstructures, we optimize the TPP process by combining violet light post-treatment with a proper selection of cleaning liquid. Consequently, we demonstrate that the sensitives k can be actively tuned over a range of two orders of magnitude, from ∼1.5 to ∼108.2 μN/μm while maintaining a high resolution of ∼1 μN/μm. Furthermore, compression tests showcase an excellent agreement among all force-vs-displacement lineshapes, resulting in a small k fluctuation of
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0088481