Capillary Nanostamping with Spongy Mesoporous Silica Stamps
Capillary Nanostamping with Spongy Mesoporous Silica Stamps
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DOI：
10.1002/adfm.201800700
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发表时间：
2018-03
影响因子：
19
通讯作者：
Mercedes Schmidt;Michael Philippi;Maximilian Münzner;J. Stangl;Ren'e Wieczorek;W. Harneit;K. Müller‐Buschbaum;D. Enke;M. Steinhart
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文献类型：
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作者：
Mercedes Schmidt;Michael Philippi;Maximilian Münzner;J. Stangl;Ren'e Wieczorek;W. Harneit;K. Müller‐Buschbaum;D. Enke;M. Steinhart
经典的微接触印刷涉及将吸附在固体印模的外表面上的分子转移到待图案化的基底。制备海绵状中孔二氧化硅印模，其可以用油墨浸泡并且用亚微米接触元件的阵列地形图案化。多个连续的冲压步骤可以在环境条件下进行，而无需重新填充油墨。富勒烯纳米粒子的晶格直径在100 nm范围内，通过冲压C60/甲苯溶液上的全氟玻璃载玻片部分润湿甲苯。将乙醇1-十二烷硫醇溶液冲压到镀金载玻片上，产生吸附的1-十二烷硫醇分子的亚微米点阵列，即使肉眼可见的乙醇滴在金上也是如此。该结果可能与印模表面上的中孔开口处的凹油墨层上的压降抵消油墨和金表面之间的货车德瓦尔斯力和/或与1-十二烷硫醇点本身被乙醇降低的润湿性有关。用亚微米1-十二烷硫醇点官能化的镀金载玻片的化学表面异质性通过熔融聚苯乙烯膜的去湿最终产生聚苯乙烯纳米颗粒的有序阵列来证明。
Classical microcontact printing involves transfer of molecules adsorbed on the outer surfaces of solid stamps to substrates to be patterned. Spongy mesoporous silica stamps are prepared that can be soaked with ink and that are topographically patterned with arrays of submicron contact elements. Multiple successive stamping steps can be carried out under ambient conditions without ink refilling. Lattices of fullerene nanoparticles with diameters in the 100 nm range are obtained by stamping C60/toluene solutions on perfluorinated glass slides partially wetted by toluene. Stamping an ethanolic 1‐dodecanethiol solution onto gold‐coated glass slides yields arrays of submicron dots of adsorbed 1‐dodecantethiol molecules, even though macroscopic ethanol drops spread on gold. This outcome may be related to the pressure drop across the concave ink menisci at the mesopore openings on the stamp surface counteracting the van der Waals forces between ink and gold surface and/or to reduced wettability of the 1‐dodecanethiol dots themselves by ethanol. The chemical surface heterogeneity of gold‐coated glass slides functionalized with submicron 1‐dodecanethiol dots is evidenced by dewetting of molten polystyrene films eventually yielding ordered arrays of polystyrene nanoparticles.