Self-organization of polymer nanoneedles into large-area ordered flowerlike arrays

Dong Wu; Qi-Dai Chen; Bin-Bin Xu; Jian Jiao; Ying Xu; Hong Xia; Hong-Bo Sun
August 2009
Applied Physics Letters;8/31/2009, Vol. 95 Issue 9, p091902
Academic Journal
Combination of top-down and bottom-up process is crucial for fabricating ordered complex micronanostructures. Here we report a simple, rapid, and versatile approach to demonstrate this useful concept, which involves the joint use of multibeam interference patterning and capillary force self-organization. Regular hydrophobic arrays of four-peddle nanoflowers consisting of bent needles with 300 nm tip diameters are readily produced. A “domino model” based on the balance of the capillary and support forces were proposed to interpret realization of large-area homogeneity of the array. The technology, promising for preparing more complex and functional structures, may find broad utilization in nano and biological researches.


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