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Evaporative Assembly: Dual‐Scale Nanostructures via Evaporative Assembly (Adv. Mater. Interfaces 7/2020)
Author(s) -
Srivastava Sunita,
Wahith Zaibudeen A.,
Gang Oleg,
Colosqui Carlos E.,
Bhatia Surita R.
Publication year - 2020
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202070036
Subject(s) - materials science , microscale chemistry , nanoparticle , nanotechnology , nanoscopic scale , nanostructure , monolayer , evaporation , mathematics education , mathematics , physics , thermodynamics
In article number 1901954, Sunita Srivastava, Surita R. Bhatia, and co‐workers demonstrate that evaporative assembly of functionalized nanoparticles can yield striking dual‐scale hierarchical structures. Regular microscale stripes of nanoparticle monolayers with hexagonal nanoscale order are obtained on physically and chemically homogeneous substrates through evaporation of a suspension of DNAfunctionalized nanoparticles with a charged shell. The stripe width, spacing and nanoparticle ordering can be controlled by varying nanoparticle concentration and can be described by a simple analytical model. The results indicate that the interplay between “stick‐slip” motion of the droplet contact line and Coulombic and steric nanoparticle interactions control the formation of the observed structures. This work demonstrates a simple cost‐effective mask‐free method for fabricating nanostructured 2D materials and metasurfaces for applications ranging from energy conversion/storage to optoelectronics and nanophotonics.