Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Evaporative Self-Assembly of Single-Walled Carbon Nanotubes for Field Effect Transistor

용매증발기반 자기조립을 이용한 단일벽 탄소나노튜브 정렬 및 트랜지스터 응용

  • Kang, Seok Hee (Department of Cogno-Mechatronics Engineering, Pusan National University) ;
  • Jeong, Do Young (Education Program for Samsung Advanced Integrated Circuit, Pusan National University) ;
  • Eom, Seong Un (Department of Nanomaterials Engineering, Pusan National University) ;
  • Hwang, Cheong Seok (Department of Nanomaterials Engineering, Pusan National University) ;
  • Hong, Suck Won (Department of Cogno-Mechatronics Engineering, Pusan National University)
  • 강석희 (부산대학교 인지메카트로닉스공학과) ;
  • 정도영 (부산대학교 차세대기판회로학과) ;
  • 엄성운 (부산대학교 나노소재공학과) ;
  • 황청석 (부산대학교 나노소재공학과) ;
  • 홍석원 (부산대학교 인지메카트로닉스공학과)
  • Received : 2013.08.12
  • Accepted : 2013.08.16
  • Published : 2013.08.27
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Abstract

Controlling the stick and slip motions of the contact lines in a confined geometry comprised of a spherical lens with a flat substrate is useful for manufacturing polymer ring patterns. We used a sphere on a flat geometry, by which we could control the interfaces of the solution, vapor and substrate. By this method, hundreds of concentric ring-pattern formations of a linear conjugated polymer, poly [2-methoxy-5-(2-thylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV), were generated with excellent regularity over large areas after complete solvent evaporation. Subsequently, the MEH-PPV ring patterns played a role as a directed template to organize highly regular concentric rings of single-walled carbon nanotubes(SWCNTs); when a droplet of the SWCNT suspension in water was casted onto the prepared substrate, hydrophobic polymer patterns confined the water dispersed SWCNTs in between the hydrophilicized $SiO_2/Si$ substrate. As the solvent evaporated, SWCNT-rings were formed in between MEH-PPV rings with controlled density. Finally, we used a lift-off process to produce SWCNT patterns by the removal of a sacrificial polymer template with organic solvent. We also fabricated a field effect transistor using self-assembled SWCNT networks on a $SiO_2/Si$ substrate.

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References

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