Article
Chemistry, Physical
Ksh Priyalakshmi Devi, Pranab Goswami, Harsh Chaturvedi
Summary: Although TiO2 is a popular semiconductor photocatalyst, its efficiency for solar energy conversion is limited due to its large bandgap. This paper introduces a cost-effective Sol-Gel technique using spin coating technology to fabricate nanocrystalline TiO2 thin films. The authors managed to achieve a dopant-free pure anatase nanocrystalline TiO2 thin film with a low band gap. Thorough investigations on the film's structure, optical characteristics, and surface morphology were conducted and presented.
APPLIED SURFACE SCIENCE
(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, Physical
Valentina Nigro, Elena Buratti, Francesca Limosani, Roberta Angelini, Franco Dinelli, Silvia Franco, Enrico Nichelatti, Massimo Piccinini, Maria Aurora Vincenti, Rosa Maria Montereali, Barbara Ruzicka
Summary: In recent decades, smart surfaces and surface coatings have become a subject of increasing interest. Microgel thin films, particularly those assembled from Poly(N-isopropylacrylamide) (PNIPAM) microgels, offer excellent control over morphology, elasticity, and hydrophobicity due to the high tunability of microgel properties. These systems have been widely studied in both theoretical and experimental research, and have shown potential for various nanotechnological applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Multidisciplinary
Sabhya, Akshayakumar Kompa, Dhananjaya Kekuda, M. S. Murari, K. Mohan Rao
Summary: This study investigates HfO2 thin films synthesized from various precursor concentrations using sol-gel processed spin coating method. It was found that films with 0.1 M Hf sol-concentration exhibited larger grain size and better crystallinity. Optical studies revealed the transparency of the films in the wavelength range of 300-1100 nm. Surface morphology studies showed low roughness values and fine spherical grains.
Article
Materials Science, Ceramics
Sayari Biswas, Asit Kumar Kar
Summary: Anatase titania thin films were prepared at different hydrothermal temperatures, with crystalinity and refractive index increasing with higher temperatures and annealing. Grain size and surface roughness also increased accordingly. The transmittance varied across different wavelength regions, while photocatalytic activity was influenced by hydrothermal temperature and annealing.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
M. I. El-Henawey, M. Kubas, A. El-Shaer, E. Salim
Summary: In this study, a solution-processed titanium dioxide thin film was successfully fabricated as an effective electron transport layer (ETL) for photovoltaic applications. The post-annealed TiO2 showed improved crystallinity and larger grain sizes, with lower band gap energy and higher photocatalytic activity, making it a suitable ETL. The performance of the post-annealed TiO2 layer in solar cell devices exhibited approximately a 21% increase in power conversion efficiency (PCE) compared to the pristine TiO2 layer.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Kenji Yoshino, Himeka Tominaga, Yuta Komaki, Masato Imai, Tomohiro Higashi, Takashi Minemoto, Qing Shen, Shuzi Hayase
Summary: A non-doped ZnMgO thin film was deposited on a white glass at room temperature using a diethylzinc-based solution and annealed at 150 degrees C. The film showed high optical transmittance (>85%) in the visible region, a-axis orientation hexagonal polycrystal structure, dense crystal, and flat surface. The n-type nature of the sample was confirmed by x-ray photoemission spectroscopy, with a resistivity of 14 x 10(6) Omega cm, carrier concentration of 3.9 x 10(11) cm(-3), and mobility of 5.0 cm(2) (Vs)(-1).
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
S. Asha Bhandarkar, Prathvi, Akshayakumar Kompa, M. S. Murari, Dhananjaya Kekuda, Rao K. Mohan
Summary: In this study, the influence of Mn dopant concentrations on the properties of TiO2 thin film was investigated through various characterization methods. It was found that increasing Mn concentration improved surface roughness and optical properties, such as enhancing luminescence property of TiO2.
Article
Materials Science, Ceramics
Sharanu, Akshayakumar Kompa, M. S. Murari, Dhananjaya Kekuda, M. G. Mahesha, K. Mohan Rao
Summary: The report studied the properties of Zinc-Tin-Oxide (ZTO) thin films coated on quartz substrates via spin coating technique, focusing on the film growth process and the effects of different cation concentrations and annealing temperatures. The results showed that ZTO films with higher cation concentrations exhibited high crystallinity and characteristic vibrational modes after annealing at 700 degrees C.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Navid Chapman, Mingyu Chapman, William B. Euler
Summary: In this study, a predictive film thickness model based on an accepted equation of state was applied to the spin-coating of sub-micron poly(methylmethacrylate) viscous thin films from toluene. The concentration effects on density and dynamic viscosity of the spin-coating solution were closely examined. Process mapping was utilized to generate a three-dimensional design space for controlling film thickness.
Article
Materials Science, Ceramics
K. Albaidani, A. Timoumi, W. Belhadj, S. N. Alamri, Saleh A. Ahmed
Summary: Sol-gel spin coating was used to deposit Cu-doped TiO2 composites, and the characteristics of the samples were evaluated. The addition of Cu resulted in a decrease in particle size, lattice expansion, formation of Ti-O-Ti bonds, an increase in bandgap, and the formation of nanoparticles.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Hongfei Liu, Chenjun Zhang, Zhiping Zhang, Xiangdong Meng, Xianghua Zeng
Summary: Orthorhombic Sc2Mo3O12 films were successfully prepared via spin coating technique followed by annealing at 500-750 degrees C. The crystallinity of the films improved with higher post-annealing temperatures, demonstrating stable negative thermal expansion properties. The coefficients of thermal expansion in different directions were also determined, showing the overall shrinkage and expansion of the thin film.
CERAMICS INTERNATIONAL
(2021)
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
Simona Liliana Iconaru, Mihai Valentin Predoi, Patrick Chapon, Sofia Gaiaschi, Krzysztof Rokosz, Steinar Raaen, Mikael Motelica-Heino, Daniela Predoi
Summary: In this study, cerium-doped hydroxyapatite (10Ce-HAp) coatings were successfully obtained using the spin coating method for the first time. The coatings showed uniformity, high strength, and strong antifungal properties, effectively inhibiting the adherence and growth of fungal cells.
Article
Chemistry, Physical
Sekhar C. Ray, Dilip Kumar Mishra, Atala Bihari Panda, H. T. Wang, Sriparna Bhattacharya (Mitra), W. F. Pong
Summary: TiO2 thin films were prepared using the reactive magnetron cosputtering technique, and the modification in the electronic structure with the increase of annealing temperatures was studied. The results showed that the annealing temperature had a significant impact on the structure and bonding of the TiO2 thin films, leading to changes in the electronic properties.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Physics, Multidisciplinary
A. Attaf, A. Derbali, H. Saidi, H. Benamra, M. S. Aida, N. Attaf, H. Ezzaouia, L. Derbali
Article
Chemistry, Physical
A. Bouhdjer, H. Saidi, A. Attaf, A. Yahia, M. S. Aida, O. Benkhetta, L. Bouhdjer
SURFACES AND INTERFACES
(2020)
Article
Chemistry, Physical
Y. Benkhetta, A. Attaf, H. Saidi, R. Messemeche, A. Bouhdjer, H. Bendjedidi, I. B. Kherkhachi, A. Rahil
SURFACES AND INTERFACES
(2020)
Article
Chemistry, Physical
H. Benamra, H. Saidi, A. Attaf, M. S. Aida, A. Derbali, N. Attaf
SURFACES AND INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
R. Nouadji, A. Attaf, A. Derbali, A. Bouhdjer, H. Saidi, M. S. Aida, F. Zeribi, O. Benkhetta, R. Messemeche, M. Nouadji, N. Attaf
Summary: This study investigated the effect of thickness on structural, morphological, optical, and electrical properties of In2O3 thin films synthesized by sol-gel spin coating technique. The results showed that increasing film thickness led to changes in crystallinity, optical transparency, and electrical resistivity of the films.
MAIN GROUP CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
A. Derbali, A. Attaf, H. Saidi, M. S. Aida, H. Benamra, R. Attaf, N. Attaf, H. Ezzaouia, L. Derbali
Summary: This study investigates the impact of Bromine (Br) doping levels on the physical properties of Zinc Sulphide (ZnS) thin films. The results show that a 0.5% Br doping ratio improves the physical properties of ZnS and makes it suitable for optoelectronic devices fabrication. The Br-doped ZnS thin films demonstrate enhanced electrical, structural, and optical properties, showing improved surface morphology and transparency, with an increase in direct band gap values with higher Br concentrations.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
A. Attaf, A. Djadai, A. Derbali, H. Saidi, M. S. Aida, N. Lehraki, N. Attaf, R. Attaf, L. Derbali, M. Poulain
Summary: In this study, high quality ZnO thin films were prepared by an ultrasonic spray pyrolysis technique with careful optimization of the ultrasonic wave amplitude. The films exhibited polycrystalline structure with a wurtzite phase, and their thickness and optical properties were influenced by the applied wave amplitude. Various techniques such as XRD and SEM were used to characterize the thin films, confirming their improved properties with increasing ultrasonic wave amplitude.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
F. Zeribi, A. Attaf, A. Derbali, H. Saidi, Lazhar Benmebrouk, M. S. Aida, M. Dahnoun, R. Nouadji, H. Ezzaouia
Summary: Highly transparent TiO2 nano-crystalline thin films were prepared using a sol-gel spin coating technique. The effects of the number of layers on the physical properties of the films were studied. The results show that the films have an anatase phase structure and high optical transparency, while the optical gap energy decreases with increasing number of layers. The films also exhibit functional groups and chemical bonding, and the resistivity increases with the number of layers.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Okba Ben Khetta, Abdellah Attaf, Ammar Derbali, Hanane Saidi, Adel Bouhdjer, Mohamed Salah Aida, Youcef Ben Khetta, Radhia Messemeche, Rahima Nouadji, Saad Rahmane, Nour Elhouda Djehiche
Summary: In this study, titanium oxide (TiO2) thin films were deposited on heated glass substrates using ultrasonic spray process. The physical properties of the films were investigated as a function of precursor concentration. The results showed that as the precursor concentration increased, the crystallite size of the TiO2 films increased, the films exhibited good adhesion to the substrate surface, the optical transmittance increased while the optical band gap decreased, and the electric resistivity of the films decreased.
Article
Chemistry, Physical
Radhia Messemeche, Youcef Benkhetta, Abdallah Attaf, Hanane Saidi, Mohamed Salah Aida, Okba Ben Khetta
Summary: Thin films of pure TiO2 and Ti1-xGaxO2 were prepared by the sol-gel method. The photocatalytic activity of Ti1-xGaxO2 was found to be significantly higher than that of pure TiO2, and the grain size decreased.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Materials Science, Multidisciplinary
R. Azizi, A. Attaf, H. Saidi, Y. Benkhetta, I. B. Kherkhachi, N. Attaf, M. Dahnoun, A. Bouhdjer
JOURNAL OF NEW TECHNOLOGY AND MATERIALS
(2019)
Article
Chemistry, Physical
Chafia Khelifi, Abdallah Attaf, Hanane Saidi, Anouar Yahia, Mohamed Dahnoun
SURFACES AND INTERFACES
(2019)
Article
Chemistry, Physical
A. Yahia, A. Attaf, H. Saidi, M. Dahnoun, C. Khelifi, A. Bouhdjer, A. Saadi, H. Ezzaouia
SURFACES AND INTERFACES
(2019)
Article
Physics, Condensed Matter
A. Derbali, H. Saidi, A. Attaf, H. Benamra, A. Bouhdjer, N. Attaf, H. Ezzaouia, L. Derbali, M. S. Aida
JOURNAL OF SEMICONDUCTORS
(2018)
Article
Chemistry, Physical
Jhilik Roy, Shubham Roy, Dhananjoy Mondal, Neelanjana Bag, Jaba Roy Chowdhury, Saheli Ghosh, Souravi Bardhan, Rajib Mondal, Ruma Basu, Sukhen Das
Summary: This study presents the synthesis and characterization of a gadolinium-doped bismuth ferrite piezo catalyst for the degradation of carcinogenic organic dyes and eradication of pathogenic bacteria. The piezo catalyst exhibits high polarization and demonstrates exceptional degradation efficiency under soft ultrasound stimulation. It also shows remarkable antibacterial activity and can be easily extracted using a magnetic field, making it a promising candidate for water treatment to prevent secondary pollution.
SURFACES AND INTERFACES
(2024)
Article
Chemistry, Physical
Sanggon Kim, Orisson Gomes, Ali Riaz, Mourad Roudjane, Paulo N. Lisboa-Filho, Augusto Batagin-Neto, Younes Messaddeq, Yves De Koninck
Summary: Surface-enhanced Raman spectroscopy (SERS) is a powerful tool in biophysics, bioanalytical chemistry, and biomedicine for monitoring extracellular chemical activity. However, the limited choice of SERS nanotags has hindered its practical application. This study repurposes fluorescent chemosensors as SERS nanotags, using a plasmon-induced reaction to immobilize them onto plasmonic nanostructures. The results demonstrate the successful immobilization and functionality of xanthene-based chemosensors as SERS chemosensors.
SURFACES AND INTERFACES
(2024)
Article
Chemistry, Physical
A. Fernandez Garcia, M. Garcia-Lechuga, F. Agullo Rueda, J. Rubio Zuazo, M. Manso Silvan
Summary: In this work, a method for fabricating WTe2 thin-films and controlling their conductivity using femtosecond laser post processing is presented. The synthesis of WTe2 films, characterization of their surface conductivity gradient and the demonstration of conductivity modulation using laser writing are described.
SURFACES AND INTERFACES
(2024)
Article
Chemistry, Physical
Zhaoqing Kang, Xin Li, Le Zhou, Dan Li, Jiangping Wang
Summary: Microencapsulated phase change materials (MicroPCMs) with polyethylene wax (PE-W) as nucleating agent were prepared using emulsion polymerization. The addition of PE-W significantly reduced the degree of supercooling and increased the enthalpy associated with heterogeneous nucleation in MicroPCMs. The thermal resistance of the MicroPCMs encapsulated by P(MMA-co-AMA) was greatly improved. The MicroPCMs demonstrated exceptional thermal storage and protective characteristics.
SURFACES AND INTERFACES
(2024)
Article
Chemistry, Physical
Chenliang Li, Kezhen Lv, Xiaomin Ding, Liyang Feng, Xiaolong Lv, Decai Ma
Summary: This study investigates the effect of surface termination composition and disorder on the electronic and contact properties of Janus Ti3C2FO materials, and provides new insight into the tuning of contact properties in MXenes/TMD heterostructures.
SURFACES AND INTERFACES
(2024)
Article
Chemistry, Physical
Asha Rajiv, Aruna Kapse, Varun Kumar Singh, Manender Singh Chauhan, Aishwary Awasthi, Prabhakar Singh
Summary: Surface modification of inorganic metal oxide nanoparticles with organic biopolymers has endowed these particles with multifunctional properties, making them versatile in the field of nanomedicine. In this study, magnesium oxide and chitosan modified magnesium oxide were synthesized using a green method. The antibacterial and anticancer activities of the synthesized hybrid nanomaterial were attributed to the generated reactive oxygen species. Chitosan modified magnesium oxide hybrid nanomaterial demonstrated appreciable efficacy against bacterial strains and showed significant anticancer potential against human breast cancer cells. Cytotoxicity assays on human fibroblast cells revealed high cell viability rates for both magnesium oxide and chitosan modified magnesium oxide hybrid nanomaterial. These findings suggest that chitosan modified magnesium oxide hybrid nanomaterial has promising applications in the biomedical field.
SURFACES AND INTERFACES
(2024)
Article
Chemistry, Physical
Lin Tao, Jingkai Wang, Qiuju Qin, Bingxian Chu, Pin Gao, Jiaqi Qiu, Qin Li, Xuechi Du, Lihui Dong, Bin Li
Summary: This study focuses on the modification of transition metal catalysts for the selective catalytic reduction of NO by CO. It investigates the effect of different anions on the modification of CO-SCR catalysts. The results show that the use of nitrate ions as a regulator for LDH support leads to a high NO conversion rate, surpassing the use of sulfate ions. The study also highlights the importance of anion modulation in controlling the valence state of loaded copper species. In situ DRIFTS analysis reveals the reaction mechanisms at different temperatures. Overall, this work provides new insights for the valence modulation of copper and the modification of LDH materials in CO-SCR applications.
SURFACES AND INTERFACES
(2024)
Article
Chemistry, Physical
Fan Xiao, Ming Cao, Yingbo Chen
Summary: In this study, a continuous and uniform ultra-thin polyamide (PA) membrane, ranging from 10 to 20 nm, was successfully synthesized by utilizing a UiO-66-(OH)2 n-hexane dispersion as a transition layer. The presence of the transition layer improved interface stability and facilitated bidirectional diffusion-contact reaction between the monomers, resulting in superior thinness and uniformity of the PA active layers.
SURFACES AND INTERFACES
(2024)
Article
Chemistry, Physical
Ashwini B. Rohom, Priyanka U. Londhe, Jeong In Han, Nandu B. Chaure
Summary: This study describes the synthesis and characterization of a ternary nanocomposite electrode for supercapacitors. The electrode, made of tin oxide/reduced graphene oxide wrapped with poly (3,4-ethylenedioxythiophene)-poly-(styrenesulfonate), exhibits excellent electrochemical properties and high cycling stability.
SURFACES AND INTERFACES
(2024)
Article
Chemistry, Physical
Jiayao Zhang, Danni Xue, Huan Liu, Zhao Wei, Chenjie Gu, Shuwen Zeng, Junhui Jiang, Tao Jiang, Xingfei Zhou, Kerong Wu
Summary: This study investigates the size-dependent enhancement of charge transfer resonance in semiconductors by adjusting the size of red phosphorus. The nano-sized red phosphorus achieves a three-fold enhancement in surface enhanced Raman scattering (SERS) intensity compared to nanosheets, making it a potential tool for accurate and efficient cancer marker diagnostics.
SURFACES AND INTERFACES
(2024)
Article
Chemistry, Physical
Bouhadjar Boukoussa, Khoukha Rachida Cherdouane, Rajaa Zegai, Adel Mokhtar, Mohammed Hachemaoui, Ismail Issam, Jibran Iqbal, Shashikant P. Patole, Fatima Zohra Zeggai, Rachida Hamacha, Mohamed Abboud
Summary: This work focuses on the preparation of inexpensive composite materials based on activated carbon-containing metallic nanoparticles MNPs (M = Cu, Ag, Fe). Different samples were tested as catalysts for the catalytic reduction of organic pollutants in the presence of NaBH4. The AC-Cu material exhibited good dispersion of CuNPs and showed the highest efficiency among the tested catalysts.
SURFACES AND INTERFACES
(2024)
Article
Chemistry, Physical
Changxing Yang, Guxia Wang, Qingyan Bai, Dan Li, Shengwei Guo
Summary: This study designed a simple and efficient graphene-based nanolubricant, which improved the lubrication performance of steel ball friction pairs through a three-step process. It has potential practical applications in the field of lubrication.
SURFACES AND INTERFACES
(2024)
