Surface forces between hydrophilic silica surfaces in a moisture-sensitive oleophilic diacrylate monomer liquid
Surface forces between hydrophilic silica surfaces in a moisture-sensitive oleophilic diacrylate monomer liquid
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DOI：
10.1063/1.4991630
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发表时间：
2018-02
期刊：
影响因子：
1.6
通讯作者：
Shunya Ito;Motohiro Kasuya;K. Kurihara;M. Nakagawa
中科院分区：
文献类型：
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作者：
Shunya Ito;Motohiro Kasuya;K. Kurihara;M. Nakagawa
我们测量了用于可靠重复紫外光(UV)纳米压印的低粘度亲油双丙烯酸酯单体中熔融二氧化硅表面之间产生的表面力，并研究了单体液体中的水对力的影响。熔融二氧化硅表面对水的静态接触角为52.6±1.7°，由于羟化程度较低，即使在低水分和高水分的相同液体单体介质中，也很难在包括接近和分离在内的重复扫描循环中显示出可重复的表面力。与低水分含量约60ppm的单体液体相比，高水分含量约420ppm的单体液体在较长的表面-表面距离处表现出更大的表面力增加的趋势。另一方面，在减压的真空紫外线(VUV)照射下，水接触角为<；5°的二氧化硅表面显示出使用低水分单体时的表面作用力的可重现的轮廓。
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 ...