@article{42c09688daed4c11915cfcec79cd82ca,
title = "Controlling the Schottky Barrier at the Pt/TiO2Interface by Intercalation of a Self-Assembled Monolayer with Oriented Dipole Moments",
abstract = "Interfacial Schottky barriers can impact the catalytic function of Pt on TiO2. Since the electronic structure is characteristic of each material, it may be advantageous to tailor the interfacial Schottky barrier by the addition of adsorbed layers. Here, we show that the Schottky barrier in Pt/TiO2can be mitigated by the insertion of self-assembled monolayers (SAM) of carboranethiols that possess an oriented dipole moment. A Pt substrate with the SAM on which TiO2nanoparticles are deposited is used to that effect. Kelvin Probe Force Microscopy shows thatm-9-carboranethiolate SAM with perpendicular dipole moments decreases the potential difference between TiO2and Pt by ∼0.3 eV due to the interfacial electric field of the SAM. Our findings open new opportunities for tailoring interfacial electronic structures not only in the metal-semiconductor junction, but also the semiconductor heterojunctions.",
author = "Taishi Ano and Fuminao Kishimoto and Shuntaro Tsubaki and Lu, {Yi Hsien} and Hohman, {J. Nathan} and Maitani, {Masato M.} and Miquel Salmeron and Yuji Wada",
note = "Funding Information: The TS-Pt sample was prepared by Dr. D. A. A. Ohlberg and Dr. Z. Li at Information & Quantum Systems Laboratory, Hewlett-Packard Laboratories. This work was supported by the Office of Basic Energy Sciences (BES), Division of Materials Sciences and Engineering, of the U.S. Department of Energy (DOE) under Contract DE-AC02-05CH11231, through the Structure and Dynamics of Materials Interfaces program (FWP KC31SM). The work at the Molecular Foundry was supported by the Office of Science and the Office of Basic Energy Sciences of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. This work was also supported in part by Grant-in-Aid for Scientific Research (S) 17H06156, Grant-in-Aid for Scientific Research (C) 18K04882, Grant-in-Aid for JSPS Fellows 17J09059, 15J08370 from MEXT, Japan, and through the Leading Graduates Schools Program, “Academy for Co-Creative Education of environment and Energy Education” from MEXT, Japan. Research Grants of TEPCO Memorial Foundation are also acknowledged. Publisher Copyright: {\textcopyright} 2021 American Chemical Society",
year = "2021",
month = jul,
day = "1",
doi = "10.1021/acs.jpcc.1c00993",
language = "English",
volume = "125",
pages = "13984--13989",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "25",
}