Journal article
Selective ozone treatment of PDMS printing stamps for selective Ag metallization: a new approach to improving resolution in patterned flexible/stretchable electronics
- Abstract:
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Hypothesis
Selective ozone treatment of Polydimethylsiloxane (PDMS) print-stamps may facilitate local de-wetting of Krytox®1506 oil; the resulting printed pattern can be used as a masking liquid during roll-to-roll vacuum-metallization, exemplified with Ag. This novel method may exploit high-throughput manufacture without chemical etchants or elevated temperatures for thin-film electronics.
Experiments
The mechanism for selective wetting arose from O3 treatment of PDMS through a shadow-mask to vary surface-energy due to formation of polar silanol (Si-OH) replacing surface methyl groups leading to contact angle reduction from 40°-9° for oil on PDMS. Oiled PDMS was (1) metalized itself and (2) used as a stamp to print onto polyethylene-terephthalate, consisting of oil pick-up/de-wetting/transfer-to-substrate/metallization.
Findings
Ag (520-568 nm) thick was deposited outside oiled regions, surpassing ∼20 μm resolution of commercial printing. On metalized PDMS, minimum line widths were 2.6 μm (with 10 μm edge-grading from centrifugal oil spreading) or widths of 24 μm (no Ag grading) following spin-coating/roll-coating oil respectively. The progressive effect of thinning oil via five successive stamp-to-substrate impressions, produced line widths of 14 μm (with graded edge of 7.6 μm via spreading from stamp-substrate compression). Developments may reduce reliance on laser engraving/photocuring, and could enhance micro-contact printing through liquid dynamics vs. topographical relief structures.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
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(Preview, Accepted manuscript, 1.9MB, Terms of use)
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- Publisher copy:
- 10.1016/j.jcis.2020.02.008
Authors
- Publisher:
- Elsevier
- Journal:
- Journal of Colloid and Interface Science More from this journal
- Volume:
- 568
- Pages:
- 273-281
- Publication date:
- 2020-02-11
- Acceptance date:
- 2020-02-04
- DOI:
- EISSN:
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1095-7103
- ISSN:
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0021-9797
- Language:
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English
- Keywords:
- Pubs id:
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1085680
- Local pid:
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pubs:1085680
- Deposit date:
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2020-02-07
Terms of use
- Copyright holder:
- Elsevier Inc.
- Copyright date:
- 2020
- Rights statement:
- © 2020 Elsevier Inc. All rights reserved.
- Notes:
- This is the accepted manuscript version of the article. The final version is available online from Elsevier at: https://doi.org/10.1016/j.jcis.2020.02.008
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