Article
Chemistry, Physical
Vladyslav Matkivskyi, Oskari Leiviska, Sigurd Wenner, Hanchen Liu, Ville Vahanissi, Hele Savin, Marisa Di Sabatino, Gabriella Tranell
Summary: This study investigated the application of two widely used atomic layer deposition precursors, TDMA-Ti and TiCl4, in TiOx-based thin films as a passivating contact material for solar cells. It was found that both precursors are suitable for similar deposition temperatures (150 °C). Post-deposition annealing significantly improved the passivation properties of the TiOx film, increasing the minority carrier lifetime (tau(eff)) by over 200 μs.AlOy/TiOx stack reduced the sheet resistance by 40% compared to pure TiOx. The passivation quality of the (AlOy/TiOx) stack was found to depend on the precursor and the ratio of AlOy to TiOx deposition cycles.
Article
Materials Science, Multidisciplinary
Alireza Sharifi Rad, Abdollah Afshar, Mohsen Azadeh
Summary: Due to climate change and the need for renewable energy, scientists are considering the modification of solar cells. This study investigates the effects of photocatalytic and anti-reflective coatings on the efficiency and stability of solar cells. Single-layer and double-layer zinc oxide thin films were studied for their photocatalytic and optical properties. The findings show that the double-layer thin film with a mesoporous top layer had the best anti-reflection performance, reducing the reflection of the glass substrate by 2.05%.
Article
Materials Science, Multidisciplinary
Huili Lei, Xuan Zhang, Si Chen, Chengbo Li, Guojiang Wan
Summary: This study demonstrates the use of a template technology consisting of grafted gallic acid and hexamethylenediamine to regulate the deposition of TiO2 films. The films deposited with the template show a more obvious anatase phase and differences in photoluminescence spectra compared to direct deposition at low temperature. Electrochemical measurements also indicate excellent electrochemical conversion properties of the TiO2 films adjusted by the template.
Article
Materials Science, Multidisciplinary
Xin Guo, Xiangqian Quan, Zizheng Li, Qiang Li, Binzhi Zhang, Xin Zhang, Chi Song
Summary: A hybrid-structured, anti-reflection coating was developed in this study, combining multi-layer thin films with a single top-oblique deposited layer to enhance photocurrent generation of photovoltaic modules and visibility in optical devices. By introducing a low-refractive index layer, the broadband anti-reflection properties of optical thin films can be improved while simplifying preparation methods.
Article
Nanoscience & Nanotechnology
Mohamed M. Shehata, Daniel H. Macdonald, Lachlan E. Black
Summary: This study demonstrates that the passivation performance of amorphous thin-film TiOx prepared via atomic layer deposition strongly depends on the accumulation of chlorine at the silicon surface. It shows that ALD TiOx can be used as a capping layer to reduce silicon surface recombination and emphasizes the importance of residual chlorine in enhancing interface passivation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Mohamed M. Shehata, Daniel H. Macdonald, Lachlan E. Black
Summary: The key part of the high level of surface passivation of ALD TiOx layers is due to the accumulation of chlorine (Cl) at the Si surface. This passivation mechanism can be classified as an effective passivation element, similar to the role of hydrogen in passivating Si dangling bonds. The presence of residual chlorine emphasizes the importance of enhancing the passivation of buried interfaces and motivates the use of metal chloride precursors for silicon surface passivation applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Hao Shi, Raheleh Azmi, Liuliu Han, Chongchong Tang, Alfons Weisenburger, Annette Heinzel, Julia Maibach, Michael Stueber, Kangli Wang, Georg Mueller
Summary: This study investigated the corrosion resistance of four types of MAX-phase coating samples in molten Pb. It was found that three of the coatings showed corrosion resistance through the formation of a protective oxide layer, while the V2AlC coating was almost completely consumed.
Article
Nanoscience & Nanotechnology
Luhua Chen, Long Chen, Jian Chu, Shuai Yang, Zhongge Ma, Zhiyuan Jia, Jinhui Song
Summary: With the development of wearable electronics, the demand for high-performance photodetectors with smaller size, lower power consumption, and higher sensitivity has increased. Photodetectors based on one-dimensional zinc oxide nanowires have been intensively investigated, but they can only detect ultraviolet light. This paper reports a heterojunction photodetector based on ZnO/CuO/NiO core-shell-shell nanowires, which shows a fast response and a large sensitivity under UV irradiation. The results indicate that core-shell-shell heterojunction nanostructures can be used to develop high-performance photodetectors for UV-vis broadband photosensing applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jose Cristiano Mengue Model, Adriano Moehlecke, Izete Zanesco, Moussa Ly, Tatiana Lisboa Marcondes
Summary: This study analyzed the impact of titanium dioxide thin film thickness on the weighted reflectance and surface passivation of silicon solar cells. Results showed that increasing the thickness enhanced surface passivation and improved internal quantum efficiency. The optimal thickness was found to be 80 nm, which achieved a balance between antireflection properties and surface passivation, leading to the highest efficiency solar cells.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2022)
Article
Chemistry, Physical
Min Liu, Feifei Huang, Zhaogui Lai, Shuhui Chen, Jinlong Li, Yongxin Wang, Lin Fan, Li Ma, Ying Jin
Summary: Through density functional theory calculations, we investigated the localized corrosion behavior of anatase TiO2 by chloride (Cl) and fluoride (F) via various mechanisms. Our results showed that F had a more aggressive influence than Cl, leading to TiO2 de-passivation by adsorption-thinning mechanism. The diffusion of Cl into the TiO2 interior was facilitated by oxygen vacancies, resulting in a reduction in passivity. Co-adsorption of Cl/F with oxygen inhibited recombination of vacancies with oxygen, thus preventing re-passivation. Understanding these mechanisms is crucial for mitigating Ti corrosion in halide-containing environments.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Coatings & Films
Shuo Chen, Chengdong Zhang, Dongqin Xiao, Feng Shi, Kang Liu, Yongxian Wan, Ke Duan, Jie Weng, Gang Feng, Yiran Yin
Summary: Ta2O5 and Mg-incorporated Ta2O5 coatings prepared by the sol-gel method showed promising effects in improving the in vitro response of rabbit bone marrow mesenchymal stem cells, including enhanced cell viability, proliferation, osteoblastic differentiation, as well as increased corrosion resistance and water wettability. The Mg-incorporated Ta2O5 coating demonstrated the greatest improvements, likely due to the nanostructures and elements release of Mg and Ta from the coatings.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Honglei Wang, Jun Shi, Jingyu Zhang, Zhehao Tao, Hongguang Wang, Qingqing Yang, Peter A. van Aken, Runfeng Chen
Summary: This study presents a facile and green method for preparing few-layer MoS2 nanosheets and nanocomposites, and demonstrates their potential in high-performance memory devices. The findings reveal the charge trapping and detrapping behaviors of the 2D MoS2-based nanocomposites.
Article
Engineering, Environmental
Shengrong Yuan, Jinze Li, Dongming Qi, Yan Zhang, Fengfeng Chen, Kai Chen
Summary: Efficient and green silver-loaded viscose fabric was prepared using a simple liquid phase spray deposition method. The silver-loaded fabric showed superior comfortability and over three times higher air permeability compared to bare viscose fabric. It also exhibited excellent antibacterial activity with a rate of 99.9%, and maintained this activity even after friction treatment. By using glutaraldehyde for chemical crosslinking, the washing and chemical resistance of the fabric could be further improved. This study provides a feasible way to manufacture environmentally friendly and durable antibacterial viscose fabric, enhancing its potential application during respiratory disease pandemics.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Energy & Fuels
Xiao-Ying Zhang, Jing Han, Yao-Tian Wang, Yu-Jiao Ruan, Wan-Yu Wu, Dong-Sing Wuu, Juan Zuo, Feng-Min Lai, Shui-Yang Lien, Wen-Zhang Zhu
Summary: Hafnium oxide (HfO2) thin film is studied as a passivation layer for crystalline silicon (c-Si). The electrical characterization and measurements of HfO2 films on P-type and N-type c-Si were conducted. Post annealing in different gas ambients was performed. The results reveal the potential of HfO2 for field effect and chemical passivation. The impacts of post-annealing gas ambient on passivation qualities on Si by HfO2 thin films are systematically studied.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Munem Ali, Jacob John Mitchell, Gregory Burwell, Klaudia Rejnhard, Cerys Anne Jenkins, Ehsaneh Daghigh Ahmadi, Sanjiv Sharma, Owen James Guy
Summary: The study focuses on creating a dielectric passivation film using molecular vapor deposition technology to protect graphene-based biosensing devices from harsh chemicals. By utilizing the reported healing effect of Al2O3 on graphene, the researchers aim to reduce photoresist residue and graphene defects for improved device homogeneity. This results in more reliable and homogeneous graphene devices that can be fabricated at wafer-scale for sensing and biosensing applications.
Article
Materials Science, Coatings & Films
Yanchun Xie, Xiaodong Wang, Shenshen Cui, Jiali Hu, Yongcun Wei, Yi Lian, Anwu Xuan, Bin Yu, Erlin Zhang
Summary: In this study, Ti-xFe (x = 3,5,9 wt%) alloys were surface modified by micro-arc oxidation (MAO) to improve their antimicrobial properties and biocompatibility. The results showed that increasing the oxidation voltage greatly enhanced the roughness and hydrophilicity of Ti-xFe-MAO alloys. The Ti-xFe alloys micro-arc oxidized at 250 V and 300 V exhibited improved corrosion resistance and excellent antimicrobial and cytocompatibility properties, making them suitable for orthopedic implant materials.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuting Hao, Zuoyan Ye, Lili Wang, Minheng Ye, Hui Dong, Chao Wang, Yunchen Du
Summary: This study focuses on the modification of PEO coatings on Ta-12W alloy using NH4F additive. The results show that ultra-low porosity coatings can be prepared by optimizing the NH4F content. The formation process of specific structures on the coating surface is discussed, and the effects of NH4F concentration and treatment duration on coating characteristics are investigated.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuanzhuo Liu, Linjiang Chai, Tao Yang, Chaodan Hu, Chuanmei Wang, Guoqiang Xi
Summary: By employing a pulsed laser, laser cladding was performed on IN718 alloy pre-coated with CrCoNi-TiC/SiC powders and three defect-free coatings were successfully prepared. The addition of TiC and SiC powders generated fine carbides dispersed in the coatings and led to changes in grain and substructure morphologies, resulting in increased hardness and wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
M. Ghaemi, A. Lopez-Cazalilla, K. Sarakinos, G. J. Rosaz, C. P. A. Carlos, S. Leith, S. Calatroni, M. Himmerlich, F. Djurabekova
Summary: The use of high-power impulse magnetron sputtering can result in dense and uniform niobium films on all surfaces of superconducting rf cavities, as simulated and investigated in this study.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Jiaheng Du, Xinli Fan, Dongqin Xiao, Wuxiang Wang, Yiran Yin, Zhong Li, Kui He, Yanfei Tan, Jiyuan Yan, Gangli Liu, Ke Duan
Summary: This study investigated the electrophoretic deposition (EPD) of magnesium oxide (MgO) coatings on micro-arc oxidized titanium (MAO-Ti) and evaluated their in vitro antibacterial properties and biocompatibility. The results showed that MgO coatings significantly reduced bacterial numbers and biofilm formation, while also demonstrating good cytocompatibility and induction of osteoblast mineralization.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Samiksha Moharana, Yuichi Otsuka, R. Gnanamoorthy
Summary: The addition of titania to HAp coatings improves their wear resistance and reduces damage to titanium implants caused by debris generation. This study evaluates the fretting wear resistance of titania-added HAp suspension plasma spray coating and finds that it exhibits reduced friction coefficient and increased wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Li-Ping Wu
Summary: The functional hazenite coating deposited on AZ31 Mg alloy showed improved roughness and hydrophilicity, enhanced biocompatibility, reduced degradation rate, and decreased susceptibility to stress corrosion cracking.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Ning Tian, Delei Xu, Jinfei Wei, Bucheng Li, Junping Zhang
Summary: This study reports the preparation of a superhydrophobic and anti-bacterial fabric for face masks. The fabric exhibits high superhydrophobicity and excellent moisture resistance, enabling functionality effectiveness in cold weather conditions. The fabric also demonstrates remarkable anti-bacterial activity against E. coli, attributed to the synergistic effect of superhydrophobicity and embedded ZnO nanoparticles. This superhydrophobic anti-bacterial fabric holds great potential for various practical applications in personal protective equipment, healthcare, and disease prevention.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Katharina Beck, Anke S. Ulrich, Andreas K. Czerny, Emma M. H. White, Martin Heilmaier, Mathias C. Galetz
Summary: Refractory metal based alloys have great potential as structural materials for high-temperature applications due to their high melting points. However, they are prone to catastrophic oxidation at around 700 degrees C. This study investigated the effect of aluminium diffusion coatings on the oxidation resistance of pure molybdenum, niobium, tantalum, and tungsten. The results showed that the aluminization improved the oxidation behavior and decreased the oxide growth rate for molybdenum and tantalum.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Wenwen Shuai, Haijun Dou, Zhichen Guan, Wei Qian, Zhibao Li, Yinqun Hua, Jie Cai
Summary: This study synthesized (Y1-xLax)3Al5O12 (x = 0, 0.1, 0.2, 0.3) materials by doping lanthanum ions, and found that the doped materials exhibited improved mechanical properties and thermal expansion coefficient, as well as enhanced resistance to CMAS corrosion. These materials have potential applications.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Xianglei Liu, Jiahui Ding, Wanbo Hou, Xinhao Shi, Tao Feng, Xiangyuan Meng, Shifeng Wen, Mingde Tong, Zhufeng Yue
Summary: A composite coating was developed to improve the adhesion, wear resistance, and corrosion resistance, which exhibited significant enhancements in these properties.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hongxuan Xing, Jidong Li, Xianwei Hu, Liang Tian, Renyun Zhang, Yiyong Wang
Summary: By depositing a Cu/Co-Mo corrosion-resistant plating layer on the surface of 6061 Al alloy, the bonding strength between the alloy and the plating layer can be improved and the corrosion resistance can be enhanced. The composite coating forms an obvious three-layer structure with Co-Mo coating exhibiting amorphous characteristics and Co3Mo phase composition. The composite coating improves the corrosion resistance and hardness of the substrate, effectively protecting the 6061 Al alloy.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Fan Yang, Debin Wang, Tianrun Li, Baijun Yang, Suode Zhang, Jianqiang Wang
Summary: The impact-corrosion behavior of monolayer and hierarchical Fe-based amorphous coatings fabricated by HVAF was investigated in 3.5 wt% NaCl solution. The monolayer coating exhibits corrosion failure with increased impact energy, while the hierarchical coating shows improved resistance. However, at high impact energies, both coatings experience corrosion degradation.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Shoaib Ahmad, Muddasir Nawaz, Solaiman Mohammad, R. A. Shakoor, Ramazan Kahraman, Talal Mohammed Al Tahtamouni
Summary: This research presents a novel self-healing anti-corrosion composite coating that demonstrates higher inhibition efficiency and self-healing effect, providing protection for metallic structures against corrosive environments.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hui-Wen Peng, Chun-Hway Hsueh
Summary: A series of (CoCrNi)100-x-ySixNdy medium entropy alloy films with manipulated metalloid element, Si, and rare earth element, Nd, were synthesized using magnetron three-target co-sputtering. The films showed different structures and mechanical properties with varying Si and Nd contents. The optimized mechanical properties were observed in the film with Si0.61Nd5.14, attributed to precipitation strengthening and grain refinement.
SURFACE & COATINGS TECHNOLOGY
(2024)