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12 Nov 2012

Volume 101, Issue 20, Articles (20xxxx)

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Appl. Phys. Lett. 101, 203102 (2012); http://dx.doi.org/10.1063/1.4747717 (4 pages)

Hyukjin Jung and Ki-Hun Jeong
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Ultrafast laser orthogonal alignment and patterning of carbon nanotube-polymer composite films

Ryan D. Murphy, Michael J. Abere, Huanan Zhang, Haiping Sun, Ben Torralva, John F. Mansfield, Nicholas A. Kotov, and Steven M. Yalisove

Appl. Phys. Lett. 101, 203301 (2012); http://dx.doi.org/10.1063/1.4766926 (5 pages)

Online Publication Date: 13 November 2012

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Dual orthogonal alignment of carbon nanotubes (CNTs) within the plane and perpendicular to a substrate is essential for many applications but difficult to obtain. Here, we demonstrate that it is possible using a combination of layer-by-layer deposition and ultrafast laser irradiation. Single-wall CNT-polymer composites preferentially aligned within the plane are irradiated with ultrafast laser pulses. After irradiation with distinct fluences at ambient conditions, morphology is seen where CNTs are formed into bundled CNTs with some orthogonal alignment. A model is presented to account for thermal expansion of the polymer and the formation of CNT bundles.
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81.16.Rf Micro- and nanoscale pattern formation
61.48.De Structure of carbon nanotubes, boron nanotubes, and other related systems
68.55.am Polymers and organics
78.47.J- Ultrafast spectroscopy (<1 psec)
61.41.+e Polymers, elastomers, and plastics
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