Strongly bound excitons in anatase TiO2 single crystals and
网页2017年4月13日 · Here, by combining steady-state angle-resolved photoemission spectroscopy and spectroscopic ellipsometry with state-of-the-art ab initio calculations, we demonstrate that the direct optical gap of...
Tuning the Microstructure and Properties of the Anatase TiO2 …
网页2023年8月13日 · Another important factor in structural properties is the atomic packing factor (APF) which expresses the compact arrangement of atoms in a unit cell. As crystal structure of the Anatase phase of TiO 2 is a body-centered tetragonal structure, and its APF relies on the ratio of ‘c’ and ‘a’.
Distribution of Pt single atom coordination environments on anatase …
网页2024年2月2日 · In this study, we address this question by depositing Pt SAs onto shape-controlled anatase TiO 2 particles, including TiO 2-nanosheets exposing predominantly (001) surfaces and TiO...
Band structure study of pure and doped anatase titanium dioxide (TiO2 ...
网页2024年6月26日 · The computed outcomes reveal that the energy band gap values of the doped samples are narrower compared to pure TiO 2. Among these, Ce-doped anatase TiO 2 exhibits the smallest band gap, measuring 1.756 eV, and displays a notable enhancement in its light absorption efficiency within the visible spectrum.
Unveiling diverse coordination-defined electronic structures of ...
网页2024年3月14日 · Herein, we report the determination of characteristic electronic structures from diverse coordination environments on the prototypical anatase-TiO 2 (001) with (1 × 4) reconstruction, using...
网页The surface structure of anatase TiO2~001! was investigated using scanning tunneling microscopy ~STM!, x-ray photoelectron spectroscopy~XPS!, reflection high-energy electron diffraction ~RHEED!, and low-energy
网页The optical properties, calculated within the dipole approximation, are found to agree with recent experiments on single crystals of anatase TiO2. Near the absorption edge, the results show a significant optical anisotropy in the …
Tailoring crystallisation of anatase TiO2 ultra-thin films grown by ...
网页2023年12月30日 · We validate two strategies to force the crystallized growth of ultrathin (<10 nm) anatase TiO 2 by ALD at low temperature with the TTIP/H 2 O as Ti precursor/oxidant couple, on any substrate, such as oxidized silicon. First is to growth directly on anatase pseudo-substrate, but this requires a pre-existing anatase surface.
Atomic Structure of the Anatase TiO2(001) Surface
网页Using ultrahigh vacuum scanning tunneling microscopy (STM), we have studied the atomic structure of anatase TiO 2 (001) epitaxial thin films grown by oxygen plasma assisted molecular beam epitaxy. Bright rows of the (1×4) reconstructed surface are resolved as three types of features with different sizes.
网页quantitative surface structural determination of a-TiO 2(101) using surface x-ray diffraction (SXRD) and compare the results with density functional theory (DFT) calculations. The results will play a role in understanding the origin of the well-known higher photoactivity of anatase [4,5], which might be linked in some way to the surface structure.