TY  - JOUR
JF  - Journal of Physical Chemistry Letters
A1  - Zhang, Y
A1  - Payne, DT
A1  - Pang, CL
A1  - Fielding, HH
A1  - Thornton, G
ID  - discovery1473153
N2  - The photochemistry of TiO2 has been studied intensively since it was discovered that TiO2 can act as a photocatalyst. Nevertheless, it has proven difficult to 
establish the detailed charge-transfer processes involved, partly because the excited states involved are difficult to study. Here we present evidence of the existence of hydroxyl-induced excited states in the conduction band region. Using two-photon photoemission, we show that stepwise photoexcitation from filled band gap states 
lying 0.8 eV below the Fermi level of rutile TiO2(110) excites hydroxyl-induced states 2.73 eV above the Fermi level that has an onset energy of ?3.1 eV. The onset is 
shifted to lower energy by the coadsorption of molecular water, which suggests a means of tuning the energy of the excited state.
SN  - 1948-7185
UR  - http://dx.doi.org/10.1021/acs.jpclett.5b01508
N1  - © 2015 American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
IS  - 17
TI  - Non-band-gap photoexcitation of hydroxylated TiO2
EP  - 3395
AV  - public
VL  - 6
Y1  - 2015/09/03/
SP  - 3391
ER  -