Arrays of Colloidal Single Crystals Engineered with DNA in Lithographically Defined Microwells

Alexa M. Wong, Kwanghwi Je, Cindy Y. Zheng, Liban Jibril, Ziyi Miao, Sharon C. Glotzer, Chad A. Mirkin

Research output: Contribution to journalArticlepeer-review

Abstract

Lithographically defined microwell templates are used to study DNA-guided colloidal crystal assembly parameters, including superlattice position, habit orientation, and size, in an effort to increase our understanding of the crystallization process. In addition to enabling the synthesis of arrays of individual superlattices in arbitrary predefined patterns, the technique allows one to study the growth pathways of the crystals via ex situ scanning electron microscopy. Importantly, a Volmer-Weber (VM) (island formation)-like growth mode is identified, which has been reproduced via simulations. Notably, both experiment and simulation reveal that the crystallites merge and reorient within the microwells that defined the crystal growth to form single-crystalline structures, an observation not common for VM pathways. The control afforded by this platform will facilitate efforts in constructing metamaterials from colloidal crystals as well as their integration into optical devices and applications.

Original languageEnglish (US)
Pages (from-to)116-123
Number of pages8
JournalNano letters
Volume23
Issue number1
DOIs
StatePublished - Jan 11 2023

Keywords

  • DNA-mediated assembly
  • colloidal crystals
  • confinement
  • crystallization
  • nanoparticles

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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