公开(公告)号：US20240209494A1

公开(公告)日：2024-06-27

申请号：US18597912

申请日：2024-03-07

Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY

Inventor： Yutaka MAJIMA ,  Junichi YAMAURA ,  Shiro KAWACHI ,  Hideo HOSONO ,  Ryo TOYAMA

IPC: C23C14/58 ,  B82Y10/00 ,  B82Y25/00 ,  B82Y40/00 ,  C22C5/04 ,  C23C14/16 ,  C23C14/22 ,  H01F1/147

CPC classification number: C23C14/5806 ,  C22C5/04 ,  C23C14/16 ,  C23C14/165 ,  C23C14/22 ,  H01F1/147 ,  B82Y10/00 ,  B82Y25/00 ,  B82Y40/00

Abstract: To provide a suitable method of producing an ordered-alloy ferromagnetic nanowire structure. Disclosed is a method of producing an ordered-alloy ferromagnetic nanowire structure, the method including: forming a nanowire on or above a substrate, the nanowire having a width of 100 nm or less and a length of at least twice the width, and made of an iron group element and a platinum group element; and subjecting the nanowire to heat treatment to obtain an ordered-alloy ferromagnetic nanowire structure in which an ordered-alloy ferromagnetic nanowire made of an ordered alloy of the iron group element and the platinum group element is formed on or above the substrate.

公开(公告)号：US20220291194A1

公开(公告)日：2022-09-15

申请号：US17829873

申请日：2022-06-01

Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY

Inventor： Yutaka MAJIMA ,  Trong Tue PHAN

IPC: G01N33/487 ,  C12Q1/6869

Abstract: A nanopore structure in an embodiment according to the present invention includes a first metal member having a thin film structure and a through hole, and a second metal member arranged to narrow a diameter of the through hole. The first metal member and the second metal member form a nanopore having a pore diameter of 10 nm or less.

公开(公告)号：US20210213707A1

公开(公告)日：2021-07-15

申请号：US17213527

申请日：2021-03-26

Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY

Inventor： Yutaka MAJIMA ,  YoonYoung CHOI ,  Ikuko SHIMADA ,  Ryo TOYAMA ,  Mingyue YANG

IPC: B32B15/01 ,  C30B25/18 ,  C23C18/31 ,  B82Y40/00

Abstract: A heteroepitaxial structure includes a first metal portion having a polycrystalline structure, a second metal portion on the first metal portion, the second metal portion has an island-shaped structure on the first metal portion, the second metal portion is provided corresponding to at least one crystalline grain exposed to a surface of the first metal portion, and the second metal portion and the at least one crystalline grain have a heteroepitaxial interface.

公开(公告)号：US20240230566A9

公开(公告)日：2024-07-11

申请号：US18547505

申请日：2022-02-15

Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY

Inventor： Yutaka MAJIMA ,  Trong Tue PHAN

IPC: G01N27/04 ,  H01L29/06

CPC classification number: G01N27/04 ,  H01L29/0673

Abstract: To provide a gas sensor with fast response and high sensitivity to oxygen gas. Disclosed is a gas sensor 100 including: a substrate 10; a first pad electrode 12A and a second pad electrode 12B; a nanowire 14 made of a specific metal; and an oxide layer 16 made of a high-resistance semiconductor that is an oxide of a metal different from a metal constituting the nanowire 14. The first pad electrode 12A and the second pad electrode 12B are formed on or above the substrate 10. The nanowire 14 connects the first pad electrode 12A and the second pad electrode 12B and is formed on or above the substrate 10.
The oxide layer 16 is formed in contact with the nanowire 14. This contact between the nanowire 14 and the oxide layer 16 provides fast response and high sensitivity to oxygen gas.

公开(公告)号：US20240133832A1

公开(公告)日：2024-04-25

申请号：US18547505

申请日：2022-02-15

Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY

Inventor： Yutaka MAJIMA ,  Trong Tue PHAN

IPC: G01N27/04 ,  H01L29/06

CPC classification number: G01N27/04 ,  H01L29/0673

Abstract: To provide a gas sensor with fast response and high sensitivity to oxygen gas. Disclosed is a gas sensor 100 including: a substrate 10; a first pad electrode 12A and a second pad electrode 12B; a nanowire 14 made of a specific metal; and an oxide layer 16 made of a high-resistance semiconductor that is an oxide of a metal different from a metal constituting the nanowire 14. The first pad electrode 12A and the second pad electrode 12B are formed on or above the substrate 10. The nanowire 14 connects the first pad electrode 12A and the second pad electrode 12B and is formed on or above the substrate 10.
The oxide layer 16 is formed in contact with the nanowire 14. This contact between the nanowire 14 and the oxide layer 16 provides fast response and high sensitivity to oxygen gas.