US 11,911,983 B2
Method of forming micro- or nanowires at predetermined positions of an object using a micro- or nanopipette
Jung Ho Je, Pohang-si (KR); Un Yang, Pohang-si (KR); Seung Soo Oh, Pohang-si (KR); Moon Jung Yong, Incheon (KR); and Byung Hwa Kang, Pohang-si (KR)
Assigned to POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION, Pohang-si (KR)
Filed by POSTECH Research and Business Development Foundation, Pohang-si (KR)
Filed on May 3, 2021, as Appl. No. 17/306,220.
Claims priority of application No. 10-2021-0014231 (KR), filed on Feb. 1, 2021.
Prior Publication US 2022/0250344 A1, Aug. 11, 2022
Int. Cl. B29D 11/00 (2006.01); B82Y 40/00 (2011.01); D01D 5/06 (2006.01); B29K 105/00 (2006.01)
CPC B29D 11/00663 (2013.01) [B82Y 40/00 (2013.01); D01D 5/06 (2013.01); B29K 2105/0073 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of forming a wire at predetermined positions of an object, the wire having a nanometer-sized diameter or a micrometer-sized diameter, the method comprising:
preparing a pipette having a tip with an inner diameter, wherein the inner diameter of the tip is a nanometer-sized inner diameter or a micrometer-sized inner diameter;
filling the pipette with a solution containing a wire-forming material;
bringing the solution into contact with an object through the tip of the pipette; and
pulling the pipette apart from the object at a pulling speed lower than or equal to a predetermined critical speed (νc) to obtain a wire having a nanometer-sized diameter or a micrometer-sized diameter,
wherein the critical speed (νc) is a maximum limit of the pulling speed at which the wire to be formed has a same diameter as the inner diameter of the tip of the pipette, and when the pulling speed is lower than the critical speed, the wire has substantially a same diameter as the inner diameter of the tip of the pipette, and when the pulling speed is higher than the critical speed, the wire has a diameter different from the inner diameter of the tip of the pipette.