Semantic Scholar Open Access 2022 88 sitasi

Chiral assemblies of pinwheel superlattices on substrates

Shan Zhou Jiahui Li Jun Lu Haihua Liu Jiyoung Kim +29 lainnya

Abstrak

The unique topology and physics of chiral superlattices make their self-assembly from nanoparticles highly sought after yet challenging in regard to (meta)materials1–3. Here we show that tetrahedral gold nanoparticles can transform from a perovskite-like, low-density phase with corner-to-corner connections into pinwheel assemblies with corner-to-edge connections and denser packing. Whereas corner-sharing assemblies are achiral, pinwheel superlattices become strongly mirror asymmetric on solid substrates as demonstrated by chirality measures. Liquid-phase transmission electron microscopy and computational models show that van der Waals and electrostatic interactions between nanoparticles control thermodynamic equilibrium. Variable corner-to-edge connections among tetrahedra enable fine-tuning of chirality. The domains of the bilayer superlattices show strong chiroptical activity as identified by photon-induced near-field electron microscopy and finite-difference time-domain simulations. The simplicity and versatility of substrate-supported chiral superlattices facilitate the manufacture of metastructured coatings with unusual optical, mechanical and electronic characteristics. Chiroptically active pinwheel assemblies on substrates are formed by tetrahedral gold nanoparticles from the effective ‘compression’ of a perovskite-like, low-density phase, thereby enabling the manufacture of metastructured coatings with special chiroptical characteristics as identified by photon-induced near-field electron microscopy and chirality measures.

Topik & Kata Kunci

Medicine Physics

Penulis (34)

Shan Zhou

Jiahui Li

Jun Lu

Haihua Liu

Jiyoung Kim

A. Kim

Lehan Yao

Chang Liu

Chang Qian

Zachary D. Hood

Wenxiang Chen

T. Gage

I. Arslan

A. Travesset

K. Sun

N. Kotov

Qian Chen Department of Materials Science

Engineering

M. Laboratory

Beckman Institute for Advanced Science

Technology

D. Chemistry

U. I. Urbana-Champaign

Department of Chemical Engineering

B. Institute

D. Physics

Department of Materials Science

U. Michigan

C. F. E. Materials

Applied Materials Division

A. N. Laboratory

Astronomy

I. S. University

Ames Lab

Format Sitasi

APA MLA BibTeX

Zhou, S., Li, J., Lu, J., Liu, H., Kim, J., Kim, A. et al. (2022). Chiral assemblies of pinwheel superlattices on substrates. https://doi.org/10.1038/s41586-022-05384-8

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Informasi Jurnal

Tahun Terbit: 2022
Bahasa: en
Total Sitasi: 88×
Sumber Database: Semantic Scholar
DOI: 10.1038/s41586-022-05384-8
Akses: Open Access ✓