AVS 58th Annual International Symposium and Exhibition
    Nanometer-scale Science and Technology Division Thursday Sessions
       Session NS-ThM

Paper NS-ThM10
Controllable Phase Transition Using a Probing Tip

Thursday, November 3, 2011, 11:00 am, Room 203

Session: Molecular Assembly and Devices
Presenter: Qing Li, Oak Ridge National Laboratory
Correspondent: Click to Email
Molecular Self-assembled monolayers have applications in many different fields, such as sensing, lubrication and molecular electronics. In our study, a movie containing more that 50 STM images is acquired to investigate the dynamic behavior of the phenyl-acetylene molecular assembly process on Au(111) surface at LN2 temperature. Besides that, we found the phenyl-acetylene molecules are very sensitive to the polarity of the bias voltage. Therefore, phase transition between molecular ordered and disordered structure can be controllably achieved by applying positive or negative bias voltage. Systematically study of the phase transition process turned out it may be related to the charging effect of the molecules.