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Characterization of solid surfaces by ionic liquid contact angle measurement in high-vacuum

Research Project

Project/Area Number 15K13613
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Physical chemistry
Research InstitutionTohoku University

Principal Investigator

Maruyama Shingo  東北大学, 工学研究科, 助教 (80732362)

Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords接触角 / イオン液体 / 真空 / ペンタセン
Outline of Final Research Achievements

In order to understand the intrinsic state of solid surfaces via liquid contact angle measurement by excluding the extrinsic effects such as surface contamination, a high-vacuum contact angle measurement system connected to a sample preparation chamber was developed. The contact angle of non-volatile ionic liquids (ILs) on TiO2 single crystal surfaces and organic thin films prepared in vacuum was evaluated without air exposure. Our findings can be summarized as follows: (1) airborne contaminations change the ILs contact angle significantly; (2) the interaction between IL and TiO2 depends on hydrophilic/hydrophobic nature of ILs; (3) the coverage and number of molecular layers of an organic thin film can be estimated by the IL contact angle. These results suggest that a simple contact angle measurement in vacuum using ILs as probe fluids would allow us to investigate the intrinsic surface state of solids.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (2 results)

All 2016 2015

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Acknowledgement Compliant: 2 results)

  • [Journal Article] Epitaxial growth of atomically flat KBr(111) films via a thin film ionic liquid in a vacuum2016

    • Author(s)
      M. Yamauchi, S. Maruyama, N. Ohashi, K. Toyabe and Y. Matsumoto
    • Journal Title

      CrystEngComm

      Volume: 18 Issue: 19 Pages: 2299-3403

    • DOI

      10.1039/c6ce00620e

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Intrinsic Nature of Interfacial Interactions between Ionic Liquids and Rutile TiO2 Single Crystal Surfaces Studied by in Situ Contact Angle Measurement in a Vacuum2015

    • Author(s)
      Shingo Maruyama, Yuji Matsumoto
    • Journal Title

      J. Phys. Chem. C.

      Volume: 119 Issue: 31 Pages: 17755-17761

    • DOI

      10.1021/acs.jpcc.5b05276

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant

URL: 

Published: 2015-04-16   Modified: 2018-03-22  

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