Inkjet printing of patterned ultra-slippery surfaces for planar droplet manipulation
Inkjet printing of patterned ultra-slippery surfaces for planar droplet manipulation
复制标题
用于平面液滴操纵的图案化超光滑表面的喷墨打印
DOI：
10.1016/j.snb.2016.06.120
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发表时间：
2016-11-01
影响因子：
8.4
通讯作者：
Wu, Tianzhun
中科院分区：
文献类型：
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作者：
Ling, Shiquan;Luo, Yong;Wu, Tianzhun
我们提出了一种简单、廉价和可扩展的喷墨打印方法来制备注入润滑剂的图案化表面，作为表面微流体的超光滑平台，并展示了典型的平面液滴操作。用家用喷墨打印机将微米图案打印在透明胶带上，形成具有图案化粘合对比度的模板。在水表面张力的驱动下组装紧密堆积的微珠单分子层，并选择性地附着在未打印的带上。然后将聚二甲基硅氧烷(PDMS)涂覆在微珠模板上，形成碗状表面，旋涂润滑油后得到超光滑的PDMS表面。对其界面特性、滑动性能和长期稳定性进行了评价和分析，这些对表面微流控应用至关重要。最后，利用图案化的超滑PDMS作为表面微流控平台，通过气动和重力驱动等非常简单方便的驱动方式实现了液滴的输送、混合、捕集和释放功能，为表面微流控技术的应用开辟了一条新的途径。(C)2016爱思唯尔B.V.保留所有权利。
We propose a facile, inexpensive and scalable inkjet-printing method to fabricate patterned lubricant infused surfaces as the ultra-slippery platform for surface microfluidics, and demonstrate typical planar droplet manipulations. Micrometer patterns were printed on scotch tapes by a home-use inkjet printer to form a template with patterned adhesion contrast. Closely packed monolayer of microbeads was assembled driven by the water surface tension and selectively adhered on the unprinted tape. Then poly(dimethylsiloxane) (PDMS) was cast against the microbead template to form a bowl-like surface, and ultra-slippery PDMS surface was achieved after spin coating lubricant oil. Its interface characterization, sliding performances and long-time stability which are critical for surface microfluidic applications were evaluated and analyzed. Finally the patterned ultra-slippery PDMS was employed as the surface microfluidic platform, and droplet transportation, mixing, trapping and releasing functions have been enabled by very simple and facile driving methods such as pneumatic and gravity driving, which pave a new way for potential flexible and low-cost applications of surface microfluidics. (C) 2016 Elsevier B.V. All rights reserved.