title: Highly transparent and conductive thin films fabricated with nano-silver/double-walled carbon nanotube composites.
abstract: This study develops a technique for enhancing the electrical conductivity and optical transmittance of transparent double-walled carbon nanotube (DWNT) film. Silver nanoparticles were modified with a NH(2)(CH(2))(2)SH self-assembled monolayer terminated by amino groups and subsequent surface condensation that reacted with functionalized DWNTs. Ag nanoparticles were grafted on the surface of the DWNTs. The low sheet resistance of the resulting thin conductive film on a polyethylene terephthalate (PET) substrate was due to the increased contact areas between DWNTs and work function by grafting Ag nanoparticles on the DWNT surfaces. Increasing the contact area between DWNTs and work function improved the conductivity of the DWNT-Ag thin films. The prepared DWNT-Ag thin films had a sheet resistance of 53.4 Ω/sq with 90.5% optical transmittance at a 550 nm wavelength. After treatment with HNO(3) and annealing at 150 °C for 30 min, a lower sheet resistance of 45.8 Ω/sq and a higher transmittance of 90.4% could be attained. The value of the DC conductivity to optical conductivity (σ(DC)/σ(OP)) ratio is 121.3.
authors.affiliation: Department of Chemical Engineering, National Tsing-Hua University, Hsin-Chu 30013, Taiwan, ROC.
authors.forename: Shie-Heng
authors.initials: SH
authors.lastname: Lee
authors.forename: Chih-Chun
authors.initials: CC
authors.lastname: Teng
authors.forename: Chen-Chi M
authors.initials: CC
authors.lastname: Ma
authors.forename: Ikai
authors.initials: I
authors.lastname: Wang
mesh_terms: D004553:Electric Conductivity; D008567:Membranes, Artificial; D053768:Metal Nanoparticles / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D008567:Membranes, Artificial; D037742:Nanotubes, Carbon; D012834:Silver