Selective placement of carbon nanotubes on metal-oxide surfaces.
We describe a method to selectively position carbon nanotubes on Al2O3 and HfO2 surfaces. The method exploits the selective binding of alkylphosphonic acids to oxide surfaces with large isoelectric points (i.e. basic rather than acidic surfaces). We have patterned oxide surfaces with acids using both microcontact printing and conventional lithography. With proper choice of the functional end group (e.g., -CH3 or -NH2), nanotube adhesion to the surface can be either prevented or enhanced.
Hannon
J B
JB
IBM Research Division, T.J. Watson Research Center, Yorktown Heights, New York 10598, USA. jbhannon@us.ibm.com
Afzali
A
A
Klinke
Ch
Ch
Avouris
Ph
P
D000535:Aluminum / Q000737:chemistry*; D006195:Hafnium / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties
D037742:Nanotubes, Carbon; D010087:Oxides; D000535:Aluminum; D006195:Hafnium