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Title
Japanese: 
English:Triptycene-Based Tripodal Self-Assembled Monolayer on Indium Tin Oxide 
Author
Japanese: Saunak Das, 石割 文崇, 庄子 良晃, 福島 孝典, Michael Zharnikov.  
English: Saunak Das, Fumitaka Ishiwari, Yoshiaki Shoji, Takanori Fukushima, Michael Zharnikov.  
Language English 
Journal/Book name
Japanese: 
English:The Journal of Physical Chemistry C 
Volume, Number, Page Vol. 127    Issue 4    Page 2088–2097
Published date Jan. 18, 2023 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://pubs.acs.org/doi/10.1021/acs.jpcc.2c08390
 
DOI https://doi.org/10.1021/acs.jpcc.2c08390
Abstract The monomolecular assembly of 1,8,13-tricarboxytriptycene (Trip-CA) on a test oxide substrate, represented by indium tin oxide (ITO), was studied. For this purpose, X-ray photoelectron spectroscopy, near-edge X-ray absorption fine structure spectroscopy, contact angle goniometry, and work function measurements were used. The quality and the parameters of the resulting self-assembled monolayers (SAMs) were found to depend strongly on the preparation conditions, with an elevated preparation temperature (50 °C) and post-annealing at an optimal temperature (100 °C) being the most favorable factors. Analysis of the data favors a monodentate bonding configuration for individual CA groups of Trip-CA and a tripodal bonding mode for the molecules as a whole, even though a certain heterogeneity of bonding configurations cannot be excluded. The molecules exhibit a moderate orientational order with an average tilt angle of 32.5°. Because of the nonpolar character of the triptycene backbone, the decoration of ITO with Trip-CA does not result in a significant change of the work function, which speaks for the introduction of polar tail groups at the application of this platform to electrostatic interface engineering.

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