PMID- 33283193 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201208 IS - 2637-6105 (Electronic) IS - 2637-6105 (Linking) VI - 1 IP - 11 DP - 2019 TI - Microfluidic Channels Fabrication Based on Underwater Superpolymphobic Microgrooves Produced by Femtosecond Laser Direct Writing. PG - 2819-2825 LID - 10.1021/acsapm.9b00269 [doi] AB - A strategy is proposed here to fabricate microfluidic channels based on underwater superpolymphobic microgrooves with nanoscale rough surface structure on glass surface produced by femtosecond (fs) laser processing. The fs laser-induced micro/nanostructure on glass surface can repel liquid polydimethylsiloxane (PDMS) underwater, with the contact angle (CA) of 155.5 +/- 2.5 degrees and CA hysteresis of 2.7 +/- 1.5 degrees to a liquid PDMS droplet. Such a phenomenon is defined as the underwater "superpolymphobicity". Microchannels as well as microfluidic systems are easily prepared and formed between the underwater superpolymphobic microgroove-textured glass substrate and the cured PDMS layer. Because the tracks of the laser scanning lines are programmable, arbitrary-shaped microchannels and complex microfluidic systems can be potentially designed and prepared through fs laser direct writing technology. The concept of "underwater superpolymphobicity" presented here offers us a new strategy for selectively avoiding the adhesion at the polymer/substrate interface and controlling the shape of cured polymers; none of these applications can find analogues in previously reported superwetting materials. CI - (c) 2019 American Chemical Society. FAU - Yong, Jiale AU - Yong J AD - The Institute of Optics, University of Rochester, Rochester, New York 14627, United States. AD - Shaanxi Key Laboratory of Photonics Technology for Information, School of Electronics & Information Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China. FAU - Zhan, Zhibing AU - Zhan Z AD - The Institute of Optics, University of Rochester, Rochester, New York 14627, United States. FAU - Singh, Subhash C AU - Singh SC AD - The Institute of Optics, University of Rochester, Rochester, New York 14627, United States. FAU - Chen, Feng AU - Chen F AUID- ORCID: 0000-0002-7031-7404 AD - Shaanxi Key Laboratory of Photonics Technology for Information, School of Electronics & Information Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China. FAU - Guo, Chunlei AU - Guo C AUID- ORCID: 0000-0001-8525-6301 AD - The Institute of Optics, University of Rochester, Rochester, New York 14627, United States. LA - eng PT - Journal Article DEP - 20190925 PL - United States TA - ACS Appl Polym Mater JT - ACS applied polymer materials JID - 101734999 PMC - PMC7672376 OTO - NOTNLM OT - PDMS OT - femtosecond laser OT - microfluidic channels OT - microfluidic systems OT - underwater superpolymphobicity COIS- The authors declare no competing financial interest. EDAT- 2019/01/01 00:00 MHDA- 2019/01/01 00:01 PMCR- 2020/11/18 CRDT- 2020/12/07 05:37 PHST- 2019/03/22 00:00 [received] PHST- 2019/09/25 00:00 [accepted] PHST- 2020/12/07 05:37 [entrez] PHST- 2019/01/01 00:00 [pubmed] PHST- 2019/01/01 00:01 [medline] PHST- 2020/11/18 00:00 [pmc-release] AID - ACSAPM-01-11-2819 [pii] AID - 10.1021/acsapm.9b00269 [doi] PST - ppublish SO - ACS Appl Polym Mater. 2019;1(11):2819-2825. doi: 10.1021/acsapm.9b00269. Epub 2019 Sep 25.