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Hierarchical Ordering of Quantum Dots and Liquid with Tunable Super‐Periodicity into High Aspect Ratio Moiré Superlattice Structure
Author(s) -
Cho SooYeon,
Jeon HwanJin,
Kim JongSeon,
Ok Jong Min,
Jung HeeTae
Publication year - 2014
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201401981
Subject(s) - superlattice , materials science , microscale chemistry , moiré pattern , substrate (aquarium) , quantum dot , aspect ratio (aeronautics) , nanotechnology , optoelectronics , lithography , optics , oceanography , mathematics education , mathematics , physics , geology
In this work, a new approach for construction of high aspect ratio complex moiré superlattice structure with versatile super‐periodicity is developed using the moiré fringe and secondary sputtering lithography. Wide assortments of high aspect ratio complex superstructures having different features on a 10 nm scaled wall are easily fabricated from simple starting components. More important is the finding of a new microscale phenomenon, consisting in trapping fluids in the centres of the moiré hexagonal fringes, as the consequence of the modulation of local hydrophilicty of the pattern. Using this phenomenon, target materials can be selectively and hierarchically confined within the moiré superlattice. Hierarchical nanoparticles (QDs) ordering with tunable super‐periodicity into selective area of moiré superlattice are successfully demonstrated by just solution‐casting of toluene based QD solution on patterned surfaces. This observation is expected to elucidate the key morphological factors that govern the physics of liquid behavior on a complex patterned substrate. Accordingly, in the near future, this facile approach for complex superlattice structure could be used as optical substrate for imaging applications and open interesting perspectives in the assembly processes and the handling of the nano‐microsized particles.