US 12,123,848 B2
Current measurement method
Masateru Taniguchi, Osaka (JP); Takahito Ohshiro, Osaka (JP); Masakazu Sanada, Kyoto (JP); and Tadashi Miyagi, Kyoto (JP)
Assigned to OSAKA UNIVERSITY, Osaka (JP)
Appl. No. 17/598,726
Filed by OSAKA UNIVERSITY, Osaka (JP)
PCT Filed Feb. 20, 2020, PCT No. PCT/JP2020/006901
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/195413, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-063813 (JP), filed on Mar. 28, 2019.
Prior Publication US 2022/0187244 A1, Jun. 16, 2022
Int. Cl. G01N 27/49 (2006.01); G01N 27/327 (2006.01); G01N 33/487 (2006.01)
CPC G01N 27/49 (2013.01) [G01N 33/48721 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A current measurement method for measuring a tunneling current in a biopolymer passing through between a pair of electrodes, the current measurement method comprising:
a) arranging said pair of electrodes in a liquid that contains an electrolyte and, while applying a voltage between said pair of electrodes, measuring a current flowing between said pair of electrodes via an electric double layer formed along surfaces of said pair of electrodes;
b) measuring the current flowing between said pair of electrodes while applying a predetermined voltage, starting from a condition in which no voltage is applied between said pair of electrodes, wherein the said pair of electrodes maintains a fixed interelectrode distance from each other while measuring the current flowing between said pair of electrodes while applying a predetermined voltage; and
c) calculating a feature quantity resulting from said electric double layer for a value of said current measured in said operation b).