A General Approach to Free-Standing Nanoassemblies via Acoustic Levitation Self-Assembly

Journal: ACS Nano

Published: 2019-05-28

DOI: 10.1021/acsnano.8b09628

Affiliations: 3

Authors: 7

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Research Highlight

Levitating liquid reaction vessels

© Jose A. Bernat Bacete/Getty

© Jose A. Bernat Bacete/Getty

Liquid droplets suspended in mid-air using sound waves could provide the ideal environment for creating self-assembling nanomaterials.

The interface between a liquid and air can be an ideal medium for self-assembling nanomaterials to form regular monolayered structures. However, in a conventional reaction flask, the liquid surface meets the side of the flask, which introduces solid–liquid and solid–air interfaces that disrupt nanostructure formation.

A team that included researchers from Northwestern Polytechnical University (NPU) in China have used acoustic levitation to suspend droplets in mid-air, forming an uninterrupted air–liquid interface for nanomaterial self-assembly.

By varying the conditions, the team could make nanoassemblies consisting of one, two or three layers, and even three-dimensional hollow nanoassemblies.

The technique is promising for creating programmed nanoassemblies from a wide range of materials, from quantum dots to graphene, the researchers say.

Supported content

  1. ACS Nano 13, 5243–5250 (2019). doi: 10.1021/acsnano.8b09628
Institutions Share
MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, NPU, China 0.43
Department of Chemical Engineering, Monash University, Australia 0.29
ANFF Melbourne Centre for Nanofabrication (MCN), Australia 0.29