期刊
ACS NANO
卷 7, 期 5, 页码 4326-4333出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn400840y
关键词
DNA nanowire; controlled evaporation self-assembly; confined geometry
类别
资金
- National Science Foundation [NSF CMMI-1153663]
- Georgia Institute of Technology
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1153663] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0968846] Funding Source: National Science Foundation
By subjecting DNA aqueous solution to evaporate in a curve-on-flat geometry that was composed of either a spherical lens or a cylindrical lens situated on a flat substrate, a set of highly aligned DNA nanowires in the forms of spokes and parallel stripes over a macroscopic area (i.e., millimeter scale) were successfully created. The DNA molecules were stretched and aligned on polymer-coated substrate by the receding meniscus. The imposed curve-on-flat geometry provided a unique environment for controlling the flow within the evaporating solution by eliminating temperature gradient and possible convective instability and, thus, regulated the formation of DNA nanowires. Such controlled evaporative self-assembly is remarkably easy to implement and opens up a new avenue for crafting large-scale DNA-based nanostructures in a simple and cost-effective manner, dispensing with the need for lithography techniques.
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