title: Formation of gradient multiwalled carbon nanotube stripe patterns by using evaporation-induced self-assembly.
abstract: Gradient stripe patterns of multiwalled carbon nanotubes (MWCNTs) with remarkable regularity over large areas were fabricated by using evaporation-induced self-assembly technique. In this method, a glass coverslip was inclinedly immersed into a suspension of MWCNTs in dichloroethane. By controlling the solvent evaporation temperature, well-defined gradient stripes were formed at the air-solvent-substrate contact line. The effects of several experimental parameters, such as the substrate tilt angle, concentration of MWCNTs, and evaporation temperature, on the regularity of stripes were discussed. A possible stripe formation process was described as a negative feedback of MWCNT concentration caused by a concavely curved shape of the meniscus. Additionally, the strips of MWCNTs on Si/SiO(2) substrate were directly used to fabricate field-effect transistor (FET) devices. The electrical properties of the MWCNT-FET devices were also investigated.
authors: College of Chemistry, Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan 411105, Hunan Province, P. R. China.
authors: Liang
authors: L
authors: Xiao
authors: Jiali
authors: J
authors: Wei
authors: Yong
authors: Y
authors: Gao
authors: Duanguang
authors: D
authors: Yang
authors: Huaming
authors: H
authors: Li
mesh_terms: D000388:Air; D002244:Carbon / Q000737:chemistry; D003460:Crystallization / Q000379:methods; D004581:Electronics; D005025:Ethylene Dichlorides / Q000737:chemistry; D008422:Materials Testing; D008853:Microscopy / Q000379:methods; D008855:Microscopy, Electron, Scanning / Q000379:methods; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature
chemical_list: D005025:Ethylene Dichlorides; D037742:Nanotubes, Carbon; D012997:Solvents; D002244:Carbon