The limits of near field immersion microwave microscopy evaluated by imaging bilayer graphene moire patterns.
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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.
SUBMITTER: Ohlberg DAA
PROVIDER: S-EPMC8170674 | biostudies-literature |
REPOSITORIES: biostudies-literature
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