Fig. 2: Nanopore analysis of Au nanospheres and Au nanoplates.

a Schematic of the nanopore experimental setup with a nanopipette and fluid compartments confined by polymethyl methacrylate (PMMA). The sample is added to the cis chamber in a 5 mM KNO₃ solution. 50 mM KNO₃ is filled in the trans chamber. b Concatenate events from Au nanospheres translocation test using a ~20 nm quartz nanopore at a 1 V bias voltage. A total of 2612 events were obtained from the Au nanospheres. c Typical nanopore current–time peak shape dependence of Au nanospheres coalescence states. Schematic of Au nanospheres translocation. d Concatenate events from Au nanoplates translocation test using a ~120 nm quartz nanopore at a bias voltage of 300 mV. A total of 761 events were obtained from the Au nanoplates. e Typical current–time peak shape for Au nanoplates. Schematic illustration of possible rotational tumbling of Au nanoplates in the nanopore sensing region.