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In a just published Nature Communications paper, bilayer graphene moiré patterns were used to measure the resolution of ScanWave and shown to be as small as 1 nm. Below is the abstract and link to this collaborative study between the Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil, the Instituto de Física, Universidade Federal da Bahia, Salvador, BA, Brazil and the National Institute for Materials Science (NIMS), Tsukuba-city, Ibaraki, Japan.

 

The limits of near field immersion microwave microscopy evaluated by imaging bilayer graphene moiré patterns

Gilberto Medeiros-Ribeiro et al.

Nature Communications volume 12, Article number: 2980 (2021)

 

Abstract

Near field scanning Microwave Impedance Microscopy can resolve structures as small as 1 nm using radiation with wavelengths of 0.1 m. Combining liquid immersion microscopy concepts with exquisite force control exerted on nanoscale water menisci, concentration of electromagnetic fields in nanometer-size regions was achieved. As a test material we use twisted bilayer graphene, because it provides a sample where the modulation of the moiré superstructure pattern can be systematically tuned from Ångstroms up to tens of nanometers. Here we demonstrate that a probe-to-pattern resolution of 108 can be obtained by analyzing and adjusting the tip-sample distance influence on the dynamics of water meniscus formation and stability.

 

To read the original publication of this paper, please visit Nature Communications.