METHOD OF MEASURING DIAMETRE OF CARBON NANOTUBES Russian patent published in 2009 - IPC G01N27/62 B82B3/00 

FIELD: physics.

SUBSTANCE: method of determining diametre of nanotubes (NT) involves measurement of ion current. The analysed sample is deposited on a gauze electrode, placed between the anode and an ion detector. Saw-tooth voltage is applied across the anode. Negative dc voltage is applied across the ion detector and the current-voltage characteristic of the ion current, on which a series of peaks is observed, is measured. Voltage values which correspond to the said peaks are found on the current-voltage characteristic, and are then compared with corresponding voltages in the current-voltage characteristic of a calibration sample, from which diametres of nanotubes in the entire sample are determined.

EFFECT: shorter time for measuring diametre of carbon nanotubes in a distance range from nanometres to tens of nanometres and simplification of measuring process, enabling simultaneous determination of diametre of nanotubes in a wide range and distribution of diametres of carbon nanotubes in the sample.

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