Device-quality, reconfigurable metamaterials from shape-directed nanocrystal assembly

Wenjie Zhou, Zizhuo Liu, Ziyin Huang, Haixin Lin, Devleena Samanta, Qing Yuan Lin, Koray Aydin, Chad A. Mirkin

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Anchoring nanoscale building blocks, regardless of their shape, into specific arrangements on surfaces presents a significant challenge for the fabrication of next-generation chip-based nanophotonic devices. Current methods to prepare nanocrystal arrays lack the precision, generalizability, and postsynthetic robustness required for the fabrication of device-quality, nanocrystal-based metamaterials [Q. Y. Lin et al. Nano Lett. 15, 4699-4703 (2015); V. Flauraud et al., Nat. Nanotechnol. 12, 73-80 (2017)]. To address this challenge, we have developed a synthetic strategy to precisely arrange any anisotropic colloidal nanoparticle onto a substrate using a shallow-template-assisted, DNA-mediated assembly approach. We show that anisotropic nanoparticles of virtually any shape can be anchored onto surfaces in any desired arrangement, with precise positional and orientational control. Importantly, the technique allows nanoparticles to be patterned over a large surface area, with interparticle distances as small as 4 nm, providing the opportunity to exploit light-matter interactions in an unprecedented manner. As a proof-of-concept, we have synthesized a nanocrystal-based, dynamically tunable metasurface (an anomalous reflector), demonstrating the potential of this nanoparticle-based metamaterial synthesis platform.

Original languageEnglish (US)
Pages (from-to)21052-21057
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume117
Issue number35
DOIs
StatePublished - Sep 1 2020

Keywords

  • DNA-mediated assembly
  • Gold nanocrystals
  • Reconfigurable metamaterials
  • Surface patterning

ASJC Scopus subject areas

  • General

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