AVS 56th International Symposium & Exhibition
    Nanometer-scale Science and Technology Tuesday Sessions
       Session NS-TuP

Paper NS-TuP7
Fabrication of Quantum Dots Utilizing Multi-Coated Self-Assembled Monolayer

Tuesday, November 10, 2009, 6:00 pm, Room Hall 3

Session: Nanometer-scale Science and Technology Poster Session
Presenter: N.Y. Kwon, Sungkyunkwan University, Korea
Authors: N.Y. Kwon, Sungkyunkwan University, Korea
K.H. Kim, Sungkyunkwan University, Korea
I.S. Chung, Sungkyunkwan University, Korea
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We have created various nano-gaps by controlling the number of self-assembled molecular coating. The generated nano-gaps were used to yield quantum dots with a precise size and placement. First, Au electrodes with an unique shape were obtained using a conventional lithography. Then, self-assembled multilayer, composed of alternating layers of α, ω -mercaptoalkanoic acids (~2 nm) and copper (II) ions, were deposited on Au electrode patterns to form the controllable gap between adjacent Au electrodes. After reaching to nanometer-scale gap, the secondary Au was deposited again and lift-off both ZEP420A(E-beam resist) and molecular resist, thereby resulting in quantum dot with nano-gap between gold electrodes. Ellipsometry and cyclic voltammetry (CV) were used to analyze the number of self-assembled molecular layer. Also, contact angle and X-ray photoelectron spectroscopy (XPS) were used to analyze chemical properties between gold and self-assembled multilayer. Additionally, Scanning probe microscopy (SPM) and field emission secondary electron microscopy (FE-SEM) were used for characterization on shape of nano-gap and quantum dots.