US 7,390,384 B2
	Device for producing negatively charged nanoparticles and a method for the same
Moxi Fang, Room 401, Building 904, Zhongguancun, Haidian District, Beijing, 100086 (China); and Yue Sun, Room 401, Building 904, Zhongguancun, Haidian District, Beijing, 100086 (China)
Appl. No. 10/483,843 PCT Filed May 13, 2002, PCT No. PCT/CN02/00328 § 371(c)(1), (2), (4) Date Jan. 12, 2004, PCT Pub. No. WO03/006362, PCT Pub. Date Jan. 23, 2003.
Claims priority of application No. 01 1 20188 (CN), filed on Jul. 11, 2001.
Prior Publication US 2004/0168923 A1, Sep. 02, 2004
Int. Cl. B82B 3/00 (2006.01); B01J 19/08 (2006.01); A61N 1/44 (2006.01)

U.S. Cl. 204—280  [204/229.4]

4 Claims

1. A device for generating negatively charged nanoparticles, which is comprised of a power supply, a casing, a controller and an electron-emitter, the power supply is connected with the electron-emitter and the controller respectively; characterized in that the electron-emitter is an electron supermicroemitter, dimensions of an emitting part of the electron supermicroemitter being smaller than or equal to a micron level; there is only one electrode with one potential in the electron supermicroemitter; the electron supermicroemitter emits electrons by means of tunneling effect, and the emitted electrons combine with the nanoparticles in air to form negatively charged nanoparticles; the potential of the electron supermicroemitter to the ground is controlled in a range of −2 kV to −29 kV.