公开(公告)号：US20240230505A9

公开(公告)日：2024-07-11

申请号：US18547681

申请日：2022-02-08

Applicant: OSAKA UNIVERSITY

Inventor： Makusu TSUTSUI ,  Shohei KISHIMOTO ,  Masateru TANIGUCHI

IPC: G01N15/12

CPC classification number: G01N15/12

Abstract: An object is to provide a device that can measure a moving time (velocity) of a single particle with high accuracy, and an ion current measuring apparatus and a zeta potential measuring apparatus with the device, and an ion current measuring method and a zeta potential measuring method. The object can be achieved by a device used for measurement of ion current, the device including: a substrate; and a channel formed in the substrate. The channel includes a sample liquid supply channel, a sample collection channel, and constricted channel formed between the sample liquid supply channel and the sample collection channel. The constricted channel includes three or more constricted parts each formed with a protrusion part, the three or more constricted parts are formed substantially straight in a direction from the sample liquid supply channel to the sample collection channel, and when the width of each of the constricted parts is defined as 1, the spacing between adjacent constricted parts is 0.5 to 3.

公开(公告)号：US20240133790A1

公开(公告)日：2024-04-25

申请号：US18547681

申请日：2022-02-08

Applicant: OSAKA UNIVERSITY

Inventor： Makusu TSUTSUI ,  Shohei KISHIMOTO ,  Masateru TANIGUCHI

IPC: G01N15/12

CPC classification number: G01N15/12

Abstract: An object is to provide a device that can measure a moving time (velocity) of a single particle with high accuracy, and an ion current measuring apparatus and a zeta potential measuring apparatus with the device, and an ion current measuring method and a zeta potential measuring method. The object can be achieved by a device used for measurement of ion current, the device including: a substrate; and a channel formed in the substrate. The channel includes a sample liquid supply channel, a sample collection channel, and constricted channel formed between the sample liquid supply channel and the sample collection channel. The constricted channel includes three or more constricted parts each formed with a protrusion part, the three or more constricted parts are formed substantially straight in a direction from the sample liquid supply channel to the sample collection channel, and when the width of each of the constricted parts is defined as 1, the spacing between adjacent constricted parts is 0.5 to 3.