公开(公告)号：EP2760785A4

公开(公告)日：2015-04-15

申请号：EP12836212

申请日：2012-08-30

Applicant: IBM

Inventor： AFZALI-ARDAKANI ALI ,  TULEVSKI GEORGE STOJAN ,  PARK HONGSIK

IPC: C01B31/02 ,  B82Y10/00 ,  B82Y40/00 ,  C07D213/76 ,  H01L29/06 ,  H01L51/00 ,  H01L51/05

CPC classification number: C07D213/79 ,  B82Y10/00 ,  B82Y40/00 ,  C07D213/76 ,  H01L29/0676 ,  H01L51/0003 ,  H01L51/0048 ,  H01L51/0049 ,  H01L51/0558

Abstract: A method of forming a structure having selectively placed carbon nanotubes, a method of making charged carbon nanotubes, a bi-functional precursor, and a structure having a high density carbon nanotube layer with minimal bundling. Carbon nanotubes are selectively placed on a substrate having two regions. The first region has an isoelectric point exceeding the second region's isoelectric point. The substrate is immersed in a solution of a bi-functional precursor having anchoring and charged ends. The anchoring end bonds to the first region to form a self-assembled monolayer having a charged end. The substrate with charged monolayer is immersed in a solution of carbon nanotubes having an opposite charge to form a carbon nanotube layer on the self-assembled monolayer. The charged carbon nanotubes are made by functionalization or coating with an ionic surfactant.

公开(公告)号：CA2847579C

公开(公告)日：2021-02-23

申请号：CA2847579

申请日：2012-08-30

Applicant: IBM

Inventor： AFZALI-ARDAKANI ALI ,  TULEVSKI GEORGE STOJAN ,  PARK HONGSIK

IPC: C01B32/158 ,  B82Y40/00 ,  C01B32/16 ,  C01B32/168 ,  C01B32/174

Abstract: There is disclosed a method of forming a structure having selectively placed carbon nanotubes ("CNTs") on a substrate to minimize bundling and areas of low density. In a first aspect, the method comprises: providing a substrate having a surface; contacting the surface of the substrate and a solution of a precursor molecule to form a self-assembled monolayer having a first ionic charge moiety on the surface; forming a plurality of CNTs having a second ionic charge moiety oppositely charged to the first ionic charge moiety by (1) bonding the plurality of CNTs with an organic molecule having a carboxylic acid ester group to form a plurality of functionalized CNTs, and (2) converting the carboxylic acid ester group to the second ionic charge moiety; and contacting the self-assembled monolayer and a dispersion of the plurality of CNTs having the second ionic charge moiety.

公开(公告)号：CA2847579A1

公开(公告)日：2013-04-04

申请号：CA2847579

申请日：2012-08-30

Applicant: IBM

Inventor： AFZALI-ARDAKANI ALI ,  TULEVSKI GEORGE STOJAN ,  PARK HONGSIK

IPC: C01B31/02

Abstract: A method of forming a structure having selectively placed carbon nanotubes, a method of making charged carbon nanotubes, a bi- functional precursor, and a structure having a high density carbon nanotube layer with minimal bundling. Carbon nanotubes are selectively placed on a substrate having two regions. The first region has an isoelectric point exceeding the second region's isoelectric point. The substrate is immersed in a solution of a bi- functional precursor having anchoring and charged ends. The anchoring end bonds to the first region to form a self-assembled monolayer having a charged end. The substrate with charged monolayer is immersed in a solution of carbon nanotubes having an opposite charge to form a carbon nanotube layer on the self-assembled monolayer. The charged carbon nanotubes are made by functionalization or coating with an ionic surfactant.

公开(公告)号：CA3102836A1

公开(公告)日：2013-04-04

申请号：CA3102836

申请日：2012-08-30

Applicant: IBM

Inventor： AFZALI-ARDAKANI ALI ,  TULEVSKI GEORGE STOJAN ,  PARK HONGSIK

IPC: C01B32/158 ,  B82Y40/00 ,  C01B32/16 ,  C01B32/168 ,  C01B32/174 ,  C12N15/10

Abstract: A method of forming a structure having selectively placed carbon nanotubes, a method of making charged carbon nanotubes, a bi-functional precursor, and a structure having a high density carbon nanotube layer with minimal bundling. Carbon nanotubes are selectively placed on a substrate having two regions. The first region has an isoelectric point exceeding the second region's isoelectric point. The substrate is immersed in a solution of a bi-functional precursor having anchoring and charged ends. The anchoring end bonds to the first region to form a self-assembled monolayer having a charged end. The substrate with charged monolayer is immersed in a solution of carbon nanotubes having an opposite charge to form a carbon nanotube layer on the self-assembled monolayer. The charged carbon nanotubes are made by functionalization or coating with an ionic surfactant.