Method of manufacturing metal nano coil

Patent metadata

Field	Value
Publication number	US-10790086-B2
Application number	US-201615548761-A
Country	US
Kind code	B2
Filing date	Feb 9, 2016
Priority date	Feb 9, 2015
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

Provided is a method of manufacturing a metal nano coil which is suitable for mass production and results in a lower manufacturing cost. The method of manufacturing a metal nano coil includes the steps of: forming, with tension applied to a core member composed of nanofiber of a polymer, a metal thin film on a surface of the core member to fabricate a metal-covered nanofiber; reducing the tension of the metal-covered nanofiber; and heating, with the tension reduced, the metal-covered nanofiber to at or above a boiling point or a thermal decomposition temperature of the polymer and at or below the melting point of the metal thin film to vaporize the core member and shrink the metal thin film into a coil form, so that a hollow metal nano coil is produced.

First claim

The invention claimed is:

1. A method of manufacturing a metal nano coil, comprising the steps of:
forming, with tension applied to a core member composed of nanofiber of a polymer, a metal thin film on a surface of the core member to fabricate a metal-covered nanofiber;
reducing, with both ends of the metal-covered nanofiber fixed, the tension of the metal-covered nanofiber; and
heating, with the tension reduced, the metal-covered nanofiber to at or above a boiling point or a thermal decomposition temperature of the polymer and at or below the melting point of the metal thin film to vaporize the core member and shrink the metal thin film into a coil form, so that the metal nano coil is produced.

2. The method of manufacturing a metal nano coil according to claim 1 , further comprising the steps of:
placing two metal movable plates separately; and
forming the core member between the movable plates by using an electrospinning method.

3. The method of manufacturing a metal nano coil according to claim 2 , wherein
the tension of the metal-covered nanofiber is reduced by reducing the distance between the movable plates, and
the metal-covered nanofiber is heated with the metal-covered nanofiber fixed to the movable plates.

Assignees

• Mitsubishi Heavy Ind Ltd
• Univ Akita
• Tsuchiya Kk

Inventors

• Muraoka Mikio
• Kamihara Nobuyuki
• Ishikawa Naomoto
• Takayanagi Toshiyuki
• Horizono Hideki
• Hayashi Hiroaki
• Yoshida Osamu
• Tsuji Kotaro

Classifications

• B22F1/0549

  Hollow particles, including tubes and shells · CPC title

• B22F1/18 Primary

  Non-metallic particles coated with metal · CPC title

• B22F1/0547

  Nanofibres or nanotubes · CPC title

• H01F41/042 Primary

  by thin film techniques · CPC title

• C23C14/34

  Sputtering · CPC title