Article
Chemistry, Physical
Ramon Azpiroz, Enrique Carretero, Ana Cueva, Aida Gonzalez, Manuel Iglesias, Jesus J. Perez-Torrente
Summary: The magnetron sputtering technique is successfully used to prepare porous TiO2 thin films on soda-lime glasses. The morphology of the thin layers is influenced by deposition parameters, and the best angle and oxidation level achieve desired porosity and film thickness. The presence of a porous film is essential for achieving photocatalytic activity.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
K. K. Purushothaman, G. Muralidharan, S. Vijayakumar
Summary: WO3 films were prepared via sol-gel dip coating method and their properties were studied. The films exhibited 74% transmission on glass substrate, with a thickness of about 260 nm and a smooth surface. They were used to develop complementary electrochromic smart windows in conjunction with NiO and Ni0.95Co0.05O.
Article
Chemistry, Analytical
Marilou Cadatal-Raduban, Jade Pope, Jiri Olejnicek, Michal Kohout, John A. Harrison, S. M. Rezaul Hasan
Summary: In this study, a photoconductivity detector in the UV-C wavelength region was developed using fabricated TiO2 thin films. The thickness of the films was found to affect the photoresponsivity, with thicker films exhibiting lower photoconductivity and responsivity, possibly due to an increased number of defects. However, the wavelength response of the detector can be controlled by varying the film thickness.
Article
Materials Science, Multidisciplinary
Ravi Teja Mittireddi, Nisha Hiralal Makani, Deepak G. Prajapati, Abhay Raj Singh Gautam, Rupak Banerjee, Emila Panda
Summary: This study focuses on quantifying the impact of microstructure on the functionality of titanium dioxide films caused by minor changes in the fabrication process. Thin titanium dioxide films are deposited using sputtering with variations in target composition and working environment. Various characterization techniques are employed to quantitatively analyze the phase, chemical constitution, composition, thickness, roughness, density, etc. of the films and their link to electronic structure, electrical, optical, and surface characteristics. The insights from this study can guide the experimental design for fabricating films with desired functionalities by considering the tolerance range.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Andris Sutka, Kaspars Malnieks, Martins Zubkins, Arturs Pludons, Anatolijs Sarakovskis, Osvalds Verners, Raivis Eglitis, Peter C. Sherrell
Summary: This study examines the tribvovoltic performance of TiO2 thin films in contact with metals of varying work functions. It is found that the current density is not strongly correlated with the work function of the contact metal but is strongly correlated with the contact area. The thermoelectric coefficients of different metals at the metal-semiconductor interface also show a clear correlation with the tribvovoltic current density.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jesse Daughtry, Abdulrahman S. Alotabi, Liam Howard-Fabretto, Gunther G. Andersson
Summary: The research aims to examine the properties required for producing thin films of TiO2 using RF plasma, with the ability to modify the films through heating to induce defects and change their characteristics. Different deposition regimes were studied to minimize unwanted contaminants and the resulting TiO2 films showed a lower cost alternative to single-crystal TiO2 with known elemental composition and modifiable properties.
NANOSCALE ADVANCES
(2021)
Article
Multidisciplinary Sciences
Md. Irfan Khan, Tasratur Reaj Neha, Md. Muktadir Billah
Summary: Thin films of transparent conductive Al-doped ZnO (AZO) were produced via sol-gel spin coating route and their structural, optical, and electrical properties were investigated. The 2 mol% AZO thin films exhibited the highest band gap and transmittance in the visible spectra. Prolonged UV irradiation significantly improved the conductivity and surface morphology of the AZO thin films.
Article
Chemistry, Analytical
Rohaida Usop, Megat Muhammad Ikhsan Megat Hasnan, Mahazani Mohamad, Mohd Khairul Ahmad, Suhana Mohd Said, Faiz Salleh
Summary: The thermoelectric power-factor of Ag-doped nanostructured-TiO2 thin films was investigated, and it was observed that the power-factor increased with increasing Ag concentration. The bilayer structure showed a three times greater increase compared to the undoped bilayer structure. This enhancement can be attributed to the increase in electrical conductivity, compensating for the small changes in the Seebeck coefficient.
Article
Chemistry, Physical
Katarzyna Plachete, Anna Kot, Joanna Banas-Gac, Marcin Zajac, Marcin Sikora, Marta Radecka, Katarzyna Zakrzewska
Summary: Titanium oxide thin films were deposited using rf magnetron sputtering, and their crystallographic structure, phase composition, morphology, and optical properties were extensively studied. It was found that the microstructure of the films changed with the O2 flow ratio, and promising photoanode materials for green hydrogen generation were identified.
APPLIED SURFACE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Salvatore Chirumbolo, Davide Gibellini, Luca Berto, Cinzia Cirrito, Antonio Vella, Geir Bjorklund, Andrea Sbarbati, Paolo Bernardi, Umberto Tirelli
Summary: TiO2-Ag doped nanoparticulate (TiO2-Ag-NP) adhesive photocatalytic films were used to assess the ability to reduce indoor microbial particles. The films were applied in various living spaces and showed a reduction of microbial pollution by more than 70%. The correlation between the reduction of relative light unit (RLU) and colony forming units per cubic meter (CFU/m(3)) confirmed the efficacy of the TiO2-Ag-NP adhesive film in reducing microbial pollution.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Nagmani, D. Pravarthana, A. Tyagi, T. C. Jagadale, W. Prellier, D. K. Aswal
Summary: A highly selective and sensitive hydrogen sulfide sensor based on nanocrystalline TiO2 thin film on a silicon substrate was developed, showing exceptional sensor response and stability at different H2S gas concentrations. The surface roughness and defects of the TiO2 film were found to play a significant role in achieving better selectivity and sensitivity properties for the sensor.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Takahiro Fukuda, Yoshito Takemoto, Takanori Wakita, Takayoshi Yokoya, Yuji Muraoka
Summary: In this study, the process of strain relaxation and spinodal decomposition in TiO2-VO2 films on TiO2 substrates was investigated. It was found that adjusting the film composition can achieve strain relaxation and the formation of multilayer structures after annealing. The film shows plastic strain relaxation along the c-axis with suppressed Ti-V interdiffusion.
Article
Engineering, Electrical & Electronic
Jeremie Chaillou, Yan-Fang Chen, Nicolas Emond, Thameur Hajlaoui, Badr Torriss, Kirtiman Deo Malviya, Emanuele Orgiu, Mohamed Chaker
Summary: Vanadium dioxide thin films doped with tungsten atoms and subjected to strain engineering exhibit a significant reduction in transition temperature, making them promising materials for electronic and energy devices. The combination of doping and strain allows for the interfacial effect to be utilized at any film thickness, resulting in a different film morphology and greatly reduced transition temperature. These tungsten-doped VO2 films show activation energies below 100 meV and a high electrical contrast, making them of strong interest for various devices.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Review
Automation & Control Systems
Valantine Takwa Lukong, Kingsley Ukoba, Tien-Chien Jen
Summary: This paper reviews the deposition of self-cleaning TiO2 thin films using the spin coater. Solar panels, as the most common renewable energy devices, are prone to contamination, which affects their efficiency. The self-cleaning technology is a promising solution. The paper introduces the working principle and precautions of the spin coater, as well as the steps and influencing factors in the spin-coating process for self-cleaning TiO2 thin films. It also summarizes the existing self-cleaning materials and recent research on process improvements.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Anish Philip, Ramin Ghiyasi, Maarit Karppinen
Summary: Curcumin, known for its antimicrobial effects, is embedded in TiO2 using ALD/MLD thin-film technique to create different superlattice structures for potential synergistic effects. The extension of light absorption to the entire visible range is shown, suggesting the possibility of using these films for light-driven pathogen destruction.
