Controlling the Cassie-to-Wenzel Transition: an Easy Route towards the Realization of Tridimensional Arrays of Biological Objects

被引：15
作者：
Ciasca, G. [1 ]
Papi, M. [1 ]
Chiarpotto, M. [1 ]
De Ninno, A. [2 ]
Giovine, E. [2 ]
Campi, G. [3 ]
Gerardino, A. [2 ]
De Spirito, M. [1 ]
Businaro, L. [2 ]
机构：
[1] Univ Cattolica Sacro Cuore, Inst Fis, I-00168 Rome, Italy
[2] CNR, Ist Fot & Nanotecnol, I-00156 Rome, Italy
[3] CNR, Inst Crystallog, I-0016 Rome, Italy
来源：
NANO-MICRO LETTERS | 2014年 / 6卷 / 03期
关键词：
Superhydrophobic patterned surfaces; Cassie-to-Wenzel transition; DNA arrays; SUPERHYDROPHOBIC PATTERNED SURFACES; NANOPATTERNED POLYMERS; FRICTION PROPERTIES; AGGREGATION; TOPOLOGY; DROPLETS; ADHESION;
D O I：
10.5101/nml140030a
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this paper we provide evidence that the Cassie-to-Wenzel transition, despite its detrimental effects on the wetting properties of superhydrophobic surfaces, can be exploited as an effective micro-fabrication strategy to obtain highly ordered arrays of biological objects. To this purpose we fabricated a patterned surface wetted in the Cassie state, where we deposited a droplet containing genomic DNA. We observed that, when the droplet wets the surface in the Cassie state, an array of DNA filaments pinned on the top edges between pillars is formed. Conversely, when the Cassie-to-Wenzel transition occurs, DNA can be pinned at different height between pillars. These results open the way to the realization of tridimensional arrays of biological objects.
引用
收藏
页码：280 / 286
页数：7
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