Surface forces between hydrophilic silica surfaces in a moisture-sensitive oleophilic diacrylate monomer liquid
We measured the surface forces generated between fused silica surfaces in a low-viscosity oleophilic diacrylate monomer for reliably repeated ultraviolet (UV) nanoimprinting, and studied the influence of water in monomer liquids on the forces. Fused silica surfaces, with a static contact angle of 52...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2018-02-01
|
| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4991630 |
| _version_ | 1818897685462122496 |
|---|---|
| author | Shunya Ito Motohiro Kasuya Kazue Kurihara Masaru Nakagawa |
| author_facet | Shunya Ito Motohiro Kasuya Kazue Kurihara Masaru Nakagawa |
| author_sort | Shunya Ito |
| collection | DOAJ |
| description | We measured the surface forces generated between fused silica surfaces in a low-viscosity oleophilic diacrylate monomer for reliably repeated ultraviolet (UV) nanoimprinting, and studied the influence of water in monomer liquids on the forces. Fused silica surfaces, with a static contact angle of 52.6 ± 1.7° for water, owing to the low degree of hydroxylation, hardly showed reproducible surface forces with repeated scan cycles, comprising approach and separation, even in an identical liquid monomer medium with both of low and high water content. The monomer liquid with a high water content of approximately 420 ppm showed a greater tendency to increase the surface forces at longer surface-surface distances compared with the monomer liquid with a low water content of approximately 60 ppm. On the other hand, silica surfaces with a water contact angle of < 5° after exposure to vacuum UV (VUV) light under a reduced air pressure showed reproducible profiles of surfaces forces using the monomer with a low water concentration of approximately 60 ppm for repeated surface forces scan cycles even in separately prepared silica surfaces, whilst they showed less reproducible profiles in the liquids with high water content of 430 ppm. These results suggested that water possibly adsorbed on the hydrophilic and hydrophobic silica surfaces in the monomer liquid of the high water concentration influenced the repeatability of the surface forces profiles. |
| first_indexed | 2024-12-19T19:20:06Z |
| format | Article |
| id | doaj.art-95dda9f9c4dc4d68816ef91d253629a1 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-19T19:20:06Z |
| publishDate | 2018-02-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-95dda9f9c4dc4d68816ef91d253629a12022-12-21T20:09:01ZengAIP Publishing LLCAIP Advances2158-32262018-02-0182025122025122-810.1063/1.4991630082802ADVSurface forces between hydrophilic silica surfaces in a moisture-sensitive oleophilic diacrylate monomer liquidShunya Ito0Motohiro Kasuya1Kazue Kurihara2Masaru Nakagawa3Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JapanInstitute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JapanNew Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10 Aramakiazaaoba, Aoba-ku, Sendai 980-8579, JapanInstitute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JapanWe measured the surface forces generated between fused silica surfaces in a low-viscosity oleophilic diacrylate monomer for reliably repeated ultraviolet (UV) nanoimprinting, and studied the influence of water in monomer liquids on the forces. Fused silica surfaces, with a static contact angle of 52.6 ± 1.7° for water, owing to the low degree of hydroxylation, hardly showed reproducible surface forces with repeated scan cycles, comprising approach and separation, even in an identical liquid monomer medium with both of low and high water content. The monomer liquid with a high water content of approximately 420 ppm showed a greater tendency to increase the surface forces at longer surface-surface distances compared with the monomer liquid with a low water content of approximately 60 ppm. On the other hand, silica surfaces with a water contact angle of < 5° after exposure to vacuum UV (VUV) light under a reduced air pressure showed reproducible profiles of surfaces forces using the monomer with a low water concentration of approximately 60 ppm for repeated surface forces scan cycles even in separately prepared silica surfaces, whilst they showed less reproducible profiles in the liquids with high water content of 430 ppm. These results suggested that water possibly adsorbed on the hydrophilic and hydrophobic silica surfaces in the monomer liquid of the high water concentration influenced the repeatability of the surface forces profiles.http://dx.doi.org/10.1063/1.4991630 |
| spellingShingle | Shunya Ito Motohiro Kasuya Kazue Kurihara Masaru Nakagawa Surface forces between hydrophilic silica surfaces in a moisture-sensitive oleophilic diacrylate monomer liquid AIP Advances |
| title | Surface forces between hydrophilic silica surfaces in a moisture-sensitive oleophilic diacrylate monomer liquid |
| title_full | Surface forces between hydrophilic silica surfaces in a moisture-sensitive oleophilic diacrylate monomer liquid |
| title_fullStr | Surface forces between hydrophilic silica surfaces in a moisture-sensitive oleophilic diacrylate monomer liquid |
| title_full_unstemmed | Surface forces between hydrophilic silica surfaces in a moisture-sensitive oleophilic diacrylate monomer liquid |
| title_short | Surface forces between hydrophilic silica surfaces in a moisture-sensitive oleophilic diacrylate monomer liquid |
| title_sort | surface forces between hydrophilic silica surfaces in a moisture sensitive oleophilic diacrylate monomer liquid |
| url | http://dx.doi.org/10.1063/1.4991630 |
| work_keys_str_mv | AT shunyaito surfaceforcesbetweenhydrophilicsilicasurfacesinamoisturesensitiveoleophilicdiacrylatemonomerliquid AT motohirokasuya surfaceforcesbetweenhydrophilicsilicasurfacesinamoisturesensitiveoleophilicdiacrylatemonomerliquid AT kazuekurihara surfaceforcesbetweenhydrophilicsilicasurfacesinamoisturesensitiveoleophilicdiacrylatemonomerliquid AT masarunakagawa surfaceforcesbetweenhydrophilicsilicasurfacesinamoisturesensitiveoleophilicdiacrylatemonomerliquid |