In situ photografting during direct laser writing in thermoplastic microchannels

In situ photografting during direct laser writing in thermoplastic microchannels

Abstract A method for in situ photografting during direct laser writing by two-photon polymerization is presented. The technique serves as a powerful approach to the formation of covalent bonds between 3D photoresist structures and thermoplastic surfaces. By leveraging the same laser for both patter...

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Main Authors: Jung Y. Han, Sarah Warshawsky, Don L. DeVoe
Format: Article
Language:English
Published: Nature Publishing Group 2021-05-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-021-90571-2
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spelling doaj-9916d9e9b5a9474fb58ed1e6c8182a9a2021-05-30T11:39:40ZengNature Publishing GroupScientific Reports2045-23222021-05-011111910.1038/s41598-021-90571-2In situ photografting during direct laser writing in thermoplastic microchannelsJung Y. Han0Sarah Warshawsky1Don L. DeVoe2Department of Mechanical Engineering, University of MarylandDepartment of Mechanical Engineering, University of MarylandDepartment of Mechanical Engineering, University of MarylandAbstract A method for in situ photografting during direct laser writing by two-photon polymerization is presented. The technique serves as a powerful approach to the formation of covalent bonds between 3D photoresist structures and thermoplastic surfaces. By leveraging the same laser for both pattern generation and localized surface reactions, crosslinking between the bulk photoresist and thermoplastic surface is achieved during polymerization. When applied to in-channel direct laser writing for microfluidic device fabrication, the process yields exceptionally strong adhesion and robust bond interfaces that can withstand pressure gradients as high as 7 MPa through proper channel design, photoinitiator selection, and processing conditions.https://doi.org/10.1038/s41598-021-90571-2
collection DOAJ
language English
format Article
sources DOAJ
author Jung Y. Han
Sarah Warshawsky
Don L. DeVoe
spellingShingle Jung Y. Han
Sarah Warshawsky
Don L. DeVoe
In situ photografting during direct laser writing in thermoplastic microchannels
Scientific Reports
author_facet Jung Y. Han
Sarah Warshawsky
Don L. DeVoe
author_sort Jung Y. Han
title In situ photografting during direct laser writing in thermoplastic microchannels
title_short In situ photografting during direct laser writing in thermoplastic microchannels
title_full In situ photografting during direct laser writing in thermoplastic microchannels
title_fullStr In situ photografting during direct laser writing in thermoplastic microchannels
title_full_unstemmed In situ photografting during direct laser writing in thermoplastic microchannels
title_sort in situ photografting during direct laser writing in thermoplastic microchannels
publisher Nature Publishing Group
series Scientific Reports
issn 2045-2322
publishDate 2021-05-01
description Abstract A method for in situ photografting during direct laser writing by two-photon polymerization is presented. The technique serves as a powerful approach to the formation of covalent bonds between 3D photoresist structures and thermoplastic surfaces. By leveraging the same laser for both pattern generation and localized surface reactions, crosslinking between the bulk photoresist and thermoplastic surface is achieved during polymerization. When applied to in-channel direct laser writing for microfluidic device fabrication, the process yields exceptionally strong adhesion and robust bond interfaces that can withstand pressure gradients as high as 7 MPa through proper channel design, photoinitiator selection, and processing conditions.
url https://doi.org/10.1038/s41598-021-90571-2
work_keys_str_mv AT jungyhan insituphotograftingduringdirectlaserwritinginthermoplasticmicrochannels
AT sarahwarshawsky insituphotograftingduringdirectlaserwritinginthermoplasticmicrochannels
AT donldevoe insituphotograftingduringdirectlaserwritinginthermoplasticmicrochannels
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