Evidence for the intrinsic nature of band-gap states electrochemically observed on atomically flat TiO2(110) surfaces
Literature Information
Shintaro Takata, Yoshihiro Miura
Using an ultra-high vacuum (UHV) electrochemistry approach with pulsed laser deposition (PLD), we investigated the band-gap state for TiO2(110). In the PLD chamber, a TiO2(110) surface was cleaned by annealing in O2 enough for it to exhibit a sharp (1 × 1) reflection high energy electron diffraction (RHEED) pattern. The cleaned TiO2(110)-(1 × 1) sample then underwent electrochemical measurements without exposure to air, showing the band-gap state at −0.14 V vs. Ag by Mott–Schottky plot analysis. The band-gap state gradually disappeared under UV illumination at +0.6 V vs. Ag due to photoetching, and reappeared on reduction in a vacuum and/or deposition of a fresh TiO2 film. These results indicated that the electrochemically observed band-gap state for TiO2(110) was a defect state due to oxygen deficiency, most probably identical to that observed under UHV, which does not necessarily exist on the surface. A quantitative analysis of the defect density suggests that the origin of this defect state is not the surface bridging hydroxyls or oxygen vacancies, but rather the interstitial Ti3+ ions in the subsurface region.
Related Literature
A facile one-step folic acid modified partially oxidized graphene for high sensitivity tumor cell sensing
Wenyu Gao, Zongxu Shen, Hao Wu, Yuehui Ma, Weijun Guan, Songmei Wu, Yu Yu, Kejian Ding
DOI: 10.1039/C6AN00778C
Fundamentals of fast-scan cyclic voltammetry for dopamine detection
B. Jill Venton, Qun Cao
DOI: 10.1039/C9AN01586H
Graphene oxide–peptide nanoassembly as a general approach for monitoring the activity of histone deacetylases
Ping Liang, Qing Li, Zhan Wu, Jian-Hui Jiang, Ru-Qin Yu
DOI: 10.1039/C6AN00902F
Optical biosensors: an exhaustive and comprehensive review
Chen Chen, Junsheng Wang
DOI: 10.1039/C9AN01998G
A paper-based colorimetric assay system for sensitive cysteine detection using a fluorescent probe
Xiaoya Ma
DOI: 10.1039/C9AN02271F
Endonuclease IV cleaves apurinic/apyrimidinic sites in single-stranded DNA and its application for biosensing
Xiang-Juan Kong, Shuang Wu, Yao Cen, Ting-Ting Chen, Ru-Qin Yu, Xia Chu
DOI: 10.1039/C6AN00738D
A facile one-pot synthesis of carbon nitride dots–reduced graphene oxide nanocomposites for simultaneous enhanced detecting of dopamine and uric acid
Ziyin Yang, Xiaohui Zheng, Zhi Li, Jianbin Zheng
DOI: 10.1039/C6AN00640J
A high-sensitive sensor with HEPES-enhanced electrochemiluminescence of benzo[3]uril for Fe3+ and its application in human serum
Yao Lei, Fei Qiu, Jian-Mei Yang, Mao Liu, Qing-Mei Ge, Hang Cong, Zhu Tao
DOI: 10.1039/C9AN02156F
Investigating CC positions and hydroxylation sites in lipids using Paternò–Büchi functionalization mass spectrometry
Patrick Esch, Sven Heiles
DOI: 10.1039/C9AN02260K
A nanoplasmonic probe as a triple channel colorimetric sensor array for protein discrimination
Jinpeng Mao, Yuexiang Lu, Ning Chang, Jiaoe Yang, Jiacheng Yang, Sichun Zhang, Yueying Liu
DOI: 10.1039/C6AN00302H
You might also like
What precautions should be taken when handling lithium chloride hydrate (1:1:1) (CAS: 16712-20-2)?
When handling lithium chloride hydrate (1:1:1) (CAS: 16712-20-2), it is importan...
Is 4-(4H-1,2,4-Triazol-4-yl)piperidine (CAS: 690261-92-8) safe?
4-(4H-1,2,4-Triazol-4-yl)piperidine is generally considered safe for use in phar...
How should waste containing 1,3-Thiazole-2-carboxamide (CAS: 16733-85-0) be handled?
Waste containing 1,3-Thiazole-2-carboxamide (CAS: 16733-85-0) should be collecte...
What regulatory guidelines apply to 5-(Difluoromethyl)-2-fluorobenzonitrile (CAS: 934175-58-3)?
5-(Difluoromethyl)-2-fluorobenzonitrile (CAS: 934175-58-3) is subject to regulat...
How is Methyl 3-acetamido-2-thiophenecarboxylate (CAS: 22288-79-5) typically synthesized?
Methyl 3-acetamido-2-thiophenecarboxylate can be synthesized by the reaction of ...
What is 4-Isoquinolinecarbonitrile (CAS: 34846-65-6)?
4-Isoquinolinecarbonitrile is a chemical compound with the CAS number 34846-65-6...
How should Methyl 1H-1,2,3-triazole-4-carboxylate (CAS: 877309-59-6) be stored?
Store Methyl 1H-1,2,3-triazole-4-carboxylate (CAS: 877309-59-6) in a cool, dry p...
What regulatory guidelines apply to 6-Bromo[1,3]thiazolo[5,4-b]pyridin-2-amine (CAS: 1160791-13-8)?
6-Bromo[1,3]thiazolo[5,4-b]pyridin-2-amine (CAS: 1160791-13-8) is subject to the...
Is (2S,3S)-2-Ammonio-3-(3,4-dihydroxyphenyl)-3-hydroxypropanoate (CAS: 23651-95-8) safe?
(2S,3S)-2-Ammonio-3-(3,4-dihydroxyphenyl)-3-hydroxypropanoate (CAS: 23651-95-8) ...
What are the physical and chemical properties of 7-bromo-3-methyl-3,4-dihydroquinazolin-4-one (CAS: 1293987-84-4)?
7-Bromo-3-methyl-3,4-dihydroquinazolin-4-one is a solid with a crystalline form....
Source Journal
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.














