Duong Dinh Loc

Publications (2)23.78 Total impact

• Source

  Available from: Anass Benayad

  Article: Transfer-free growth of few-layer graphene by self-assembled monolayers.

  Hyeon-Jin Shin, Won Mook Choi, Seon-Mi Yoon, Gang Hee Han, Yun Sung Woo, Eun Sung Kim, Seung Jin Chae, Xiang-Shu Li, Anass Benayad, Duong Dinh Loc, Fethullah Gunes, Young Hee Lee, Jae-Young Choi
  Advanced Materials 08/2011; 23(38):4392-7. · 13.88 Impact Factor
• Source

  Available from: Gunn Kim

  Article: Reduction-controlled viologen in bisolvent as an environmentally stable n-type dopant for carbon nanotubes.

  Soo Min Kim, Jin Ho Jang, Ki Kang Kim, Hyeon Ki Park, Jung Jun Bae, Woo Jong Yu, Il Ha Lee, Gunn Kim, Duong Dinh Loc, Un Jeong Kim, Eun-Hong Lee, Hyeon-Jin Shin, Jae-Young Choi, Young Hee Lee
  [show abstract] [hide abstract]
  ABSTRACT: Various viologens have been used to control the doping of single-walled carbon nanotubes (SWCNTs) via direct redox reactions. A new method of extracting neutral viologen (V(0)) was introduced using a biphase of toluene and viologen-dissolved water. A reductant of sodium borohydride transferred positively charged viologen (V(2+)) into V(0), where the reduced V(0) was separated into toluene with high separation yield. This separated V(0) solution was dropped on carbon nanotube transistors to investigate the doping effect of CNTs. With a viologen concentration of 3 mM, all the p-type CNT transistors were converted to n-type with improved on/off ratios. This was achieved by donating electrons spontaneously to CNTs from neutral V(0), leaving energetically stable V(2+) on the nanotube surface again. The doped CNTs were stable in water due to the presence of hydrophobic V(0) at the outermost CNT transistors, which may act as a protecting layer to prevent further oxidation from water.
  Journal of the American Chemical Society 01/2009; 131(1):327-31. · 9.91 Impact Factor