Seminar

Seminar

[세미나 공지]3월 12일(목)

  • POSTED DATE : 2015-03-30
  • WRITER : 관리자
  • HIT : 2831
  • DATE : 2015-03-12
  • PLACE : 화학관 330226호
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다음주 목요일(3월 12일) 정규세미나가 진행됩니다.               

많은 참석 부탁드립니다.

 
감사합니다.       


 

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제  목 :  Chemical and Nano-tribological Properties of CH3-terminated


연  사 : 임민수 교수님(Slippery Rock University)

 

일  시 : 2015년 3월 12(목) 오후 4시 30분


장  소 : 화학관 세미나실 (330226호실)

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Chemical and Nano-tribological Properties of CH3-terminated Films

 

    

      Molecular-scale boundary lubrication is inevitable for many modern day devices due to micrometer-/nanometer- sized shrinkage of their geometrical dimensions, including high-density computer hard disk drives (HDD) and microelectromechanical systems (MEMS). A self-assembled monolayer (SAM) of organic molecules is a good candidate to serve this demand. A SAM is a two-dimensional molecular array that is spontaneously organized by adsorption of amphiphilic organic molecules on a solid inorganic surface. Typically, an adsorbing molecule consists of a head group that initiates the molecule to anchor to a solid substrate surface, a methylene backbone chain that influences the packing density of a film by its length, and a terminal group that determines the surface properties of the thin film.
    The present study explores the chain-length dependent frictional properties of methyl (CH3-) terminated SAMs and mixed SAMs, desorption kinetics of SAMs in aqueous environment, and their thermally driven stability. Morphological and tribological properties were investigated with atomic force microscopy (AFM). Chain ordering of the thin films was analyzed with diffuse reflectance infrared fourier transform spectroscopy (DRIFT) prior to the friction measurements. Wettability of the films was measured with water contact angles to explore hydrophobic nature of the films.