Nanotube assembly
Methods and articles providing for precise aligning, positioning, shaping, and linking of nanotubes and carbon nanotubes. An article comprising: a solid surface comprising at least two different surface regions including: a first surface region which comprises an outer boundary and which is adapted for carbon nanotube adsorption, and a second surface region which is adapted for preventing carbon nanotube adsorption, the second region forming an interface with the outer boundary of the first region, at least one carbon nanotube which is at least partially selectively adsorbed at the interface. The shape and size of the patterns on the surface and the length of the carbon nanotube can be controlled to provide for selective interfacial adsorption.
1. An article comprising:
a solid surface comprising at least two different surface regions including:
a first surface region which comprises an outer boundary and which is adapted for carbon nanotube adsorption, and
a second surface region which is adapted for preventing carbon nanotube adsorption, the second region forming an interface between the outer boundary of the first region and the boundary of the second region,
at least one carbon nanotube sufficiently longer than the size and shape of the first surface region so that at least 10% of the length of the at least one carbon nanotube is selectively adsorbed at the interface and the at least one carbon nanotube bends along the perimeter of the first surface region.
2. The article according to claim 1 , wherein the first region comprises hydrophilic groups.
3. The article according to claim 1 , wherein the first region comprises carboxyl groups.
4. The article according to claim 1 , wherein the second region comprises hydrophobic groups.
5. The article according to claim 1 , wherein the second region comprises alkyl groups.
6. The article according to claim 1 , wherein the first surface region comprises a dot, a ring, a line, or a curvilinear structure.
7. The article according to claim 1 , comprising a plurality of first surface regions which form a periodic array.
8. The article according to claim 1 , wherein the carbon nanotube is a multi-walled, a double-walled, or a single wall carbon nanotube.
9. The article according to claim 1 , wherein a plurality of carbon nanotubes are adsorbed which have an average length of at least 0.4 microns.
10. The article according to claim 1 , wherein carbon nanotube has a length of about 10 nm to about 50 nm.
11. The article according to claim 1 , wherein the first region forms a dot having a dot diameter, a ring having a ring diameter, and the nanotube has a length which is longer than the diameter.
12. The article according to claim 1 , wherein the carbon nanotube is a single wall carbon nanotube, and wherein a plurality of carbon nanotubes are selectively adsorbed at the interface and are linked together.
13. An article comprising:
a solid surface comprising at least two different surface regions including:
a first surface region which comprises an outer boundary and which is adapted for nanowire adsorption, and
a second surface region which is adapted for preventing nanowire adsorption, the second region forming an interface between the outer boundary of the first region and the boundary of the second region,
at least one nanowire which is sufficiently longer than the size and shape of the first surface region so that at least 10% of the length of the at least one nanowire is selectively adsorbed at the interface and the at least one nanowire bends along the perimeter of the first surface region.
14. The article according to claim 13 , wherein the outer boundary is circular.
15. The article according to claim 13 , wherein the nanowire forms a ring.
16. The article according to claim 13 , wherein the nanowire is a silicon nanowire.
17. The article according to claim 13 , wherein the article is a thin film having a film height of about 10 nm or less.
18. The article according to claim 13 , wherein the article is a filtration membrane.
19. The article according to claim 13 , wherein the first region or the second region have a lateral dimension which is about 100 nm or less.
20. The article according to claim 13 , wherein the article provides a nanowire packing density of at least 5×10 7 /cm 2 .