Article
Chemistry, Physical
Syrine Jebali, Marylene Vayer, Khaled Belal, Fredric Mahut, Christophe Sinturel
Summary: The dip-coating deposition of nanocomposite thin films composed of polyvinylpyrrolidone and silica nanoparticles was studied using atomic force microscopy and scanning electron microscopy. The presence of particles did not affect the film thickness, and no preferential retrieval of particles or polymer occurred during deposition. The behavior of particle distribution differed in thicker and thinner films, indicating competition and interplay between time-dependent phenomena during the dip-coating process.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Energy & Fuels
Pannan Kyesmen, Nolwazi Nombona, Mmantsae Diale
Summary: Alpha-Fe2O3 films of various thicknesses were prepared using dip, spin, and combined dip/spin coating methods in this research. The dip-coated films exhibited the best photoresponse, while the films prepared by spin coating method showed the least photocurrent values. The study highlighted the importance of optimizing both coating techniques and film thickness for preparing nanostructured alpha-Fe2O3 films for PEC applications.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Mechanics
Clare R. Rees-Zimmerman, Alexander F. Routh
Summary: This research is motivated by the desire to control the solids distribution during the drying of a film containing particles of two different sizes. A colloidal hydrodynamics model is formulated and solved to determine the relative importance of diffusion and excluded volume diffusiophoresis in affecting the particle arrangement. Numerical results show that the addition of excluded volume diffusiophoresis can lead to small-on-top stratification, offering a potential explanation for experimental observations.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Materials Science, Ceramics
Mohammed Althamthami, Elhachmi Guettaf Temam, Hachemi Ben Temam, Gamil Gamal Hasan, Najran Malfi
Summary: This study utilizes environmentally friendly cobalt oxide thin films with high photocatalytic activity. The effects of different withdrawal speeds during the dip-coating process on the structure, morphology, roughness, and optical properties of the thin films were investigated. The addition of hole-scavengers improved the photocatalytic degradation performance. The findings emphasize the potential application of this material for treating organic contaminants in various wastewater sources under sunlight irradiation.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
Junpeng Xu, Chih-Yu Fu, Yu-Liang Tsai, Chui-Wei Wong, Shan-hui Hsu
Summary: Conductive thin films with thermoresponsive, hydrophilic, strain sensing, and biocompatible properties were successfully synthesized in this study. The mechanical properties of the thin films were significantly enhanced by heat treatment, and they showed great potential for applications in neural stem cell culture.
Article
Chemistry, Multidisciplinary
Zhide Luo, Cuiping Zhang, Li Yang, Jinbao Zhang
Summary: Perovskite solar cells (PSCs) have shown rapid development in recent years, but their stability has been a key limitation for industrialization and commercialization due to sensitivity to environmental factors. This research developed an ambient spray coating method to create organic-inorganic composite films, significantly enhancing the stability of PSCs and offering potential for flexible and curved device applications.
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
Polymer Science
Fanon Julienne, Fabienne Lagarde, Jean-Francois Bardeau, Nicolas Delorme
Summary: Plastic pollution is a prominent environmental issue, and understanding the aging and fragmentation mechanism of polymers is crucial for addressing environmental and health concerns. This study presents a novel method for preparing LDPE films with different thicknesses and controlled crystalline morphologies, and investigates the influence of crystalline morphology on the photo-oxidation rate through accelerated weathering tests.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Materials Science, Ceramics
Mohammed Bouzbib, Janos Rohonczy, Katalin Sinko
Summary: This study investigates the impact of chemical substances on the structure, surface morphology, and material properties of vanadium oxide thin films. The focus is on the effects of initial materials and various additives using the sol-gel chemistry principle. The objectives are to optimize the chemical conditions for the preparation of V5+-containing layers and to examine the controllability of the V4+/V5+ ratios. Atomic and bond structures are analyzed using V-51 MAS NMR, IR, and UV spectroscopies, while supramolecular structures are determined through SEM, EDX, and GIXRD techniques.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Antonio Diaz-Parralejo, M. Angeles Diaz-Diez, Jose Sanchez-Gonzalez, Antonio Macias-Garcia, Juan Pablo Carrasco-Amador
Summary: This study prepared thin multilayer coatings of ZrO2-Y2O3-Al2O3 using the sol-gel method and dip-coating technique, investigating the influence of Al2O3 incorporation on the films. It was found that increasing alumina content improved the toughness and resistance to thermal shock of the coatings.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Multidisciplinary
Ahmed Ziti, Bouchaib Hartiti, Salma Smairi, Hicham Labrim, Youssef Nouri, Amine Belafhaili, Herve Joel Tchognia Nkuissi, Salah Fadili, Mounia Tahri, Philippe Thevenin
Summary: In this research, copper-cobalt-tin-sulphur (CCoTS) absorbers were synthesized using the sol-gel process and dip-coating deposition technique. The impact of annealing temperature on the structural, compositional, morphological, optical and electrical characteristics of CCoTS layers was studied. The results showed that the CCoTS absorbers had a polycrystalline structure with small grain size and high purity. The density and uniformity of the films improved with increasing annealing temperature. The band gap and sheet resistance of the films also exhibited interesting changes.
Article
Optics
Zohra Nazir Kayani, Zainab Bashir, Munazza Mohsin, Saira Riaz, Shahzad Naseem
Summary: Novel boron nitride thin films were deposited using sol-gel dip coating with boric acid and boron nitrate precursors. The films showed preferred orientation along the (002) plane, with thickness increasing with boric acid molarity and decreasing with boron nitrate molarity. Band gap, magnetic properties, dielectric constant, and AC conductivity all varied with precursor molarity. Additionally, boron nitride demonstrated remarkable antibacterial activity.
Article
Materials Science, Ceramics
Koji Abe, Tasuku Kubota
Summary: Al-doped ZnO (AZO) films were prepared by sol-gel method using precursor solutions containing oxygen sources. Zinc vacancy acceptors were formed under oxygen-rich growth conditions. Glass substrates with a zinc layer were used to supply zinc to the AZO films during calcination annealing. The AZO films showed wurtzite ZnO crystal structure and high transparency. The electrical properties of the films were improved by using substrates with a zinc layer, achieving a low resistivity of 9.4 x 10(-4) Ocm.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
B. Al Farsi, T. M. Souier, F. Al Marzouqi, M. Al Maashani, M. Bououdina, H. M. Widatallah, M. Al Abri
Summary: Transparent pure and Al-doped zinc oxide thin films were successfully deposited on glass substrates using the sol-gel dip-coating technique. The study found that Al doping and annealing temperature have significant effects on the structural, morphological, optical properties, and photocatalytic activity of the films. Al doping was found to improve the photocatalytic activity of the films.
Article
Engineering, Electrical & Electronic
A. Garrido-Hernandez, D. Y. Medina-Velazquez, A. S. de Ita y de la Torre, A. de J. Morales-Ramirez, M. Molina-Morales, M. A. Barron-Meza, Y. Ramirez-Quiros, J. Reyes-Miranda
Summary: This study investigates the effects of annealing temperature and europium doping concentration on the properties of ZnS:Eu3+ thin films. It was found that higher europium concentration led to higher emission intensity in the blue-green regions, while increasing annealing temperature resulted in a 2.5-fold decrease in emission intensity.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Spectroscopy
Muhammad Abu Bakkar, Haq Nawaz, Muhammad Irfan Majeed, Ammara Naseem, Allah Ditta, Nosheen Rashid, Saqib Ali, Jawad Bajwa, Saba Bashir, Shamsheer Ahmad, Hamza Hyat, Kareem Shah Bukhari, Franck Bonnier
Summary: The study demonstrated the potential of Raman spectroscopy in qualitative and quantitative analysis of different concentrations of Sitagliptin in pharmaceutical formulations. A PLSR model was constructed to predict drug concentrations in complex matrices, showing it to be a reliable tool for verifying Sitagliptin contents in pharmaceutical samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Biochemistry & Molecular Biology
Hichem Kichou, Emilie Munnier, Yuri Dancik, Kamilia Kemel, Hugh J. Byrne, Ali Tfayli, Dominique Bertrand, Martin Souce, Igor Chourpa, Franck Bonnier
Summary: Confocal Raman microscopy (CRM) coupled with multivariate analysis was used to quantitatively measure active ingredients applied to ex vivo human stratum corneum. The method demonstrated reliability and accuracy by establishing key performance indicators and comparing them to established methodologies. Numerical criteria for analytical performance were determined, and Raman spectroscopy was shown to comply with international guidelines, making it a valuable tool for permeation studies.
Article
Chemistry, Applied
Hichem Kichou, Yuri Dancik, Christophe Eklouh-Molinier, Nicolas Huang, Martin Souce, Laurianne Gressin, Guillaume Gillet, Igor Chourpa, Emilie Munnier, Franck Bonnier
Summary: This study compares the key formulation characteristics and caffeine permeation kinetics of emulsions synthesized by HFUT and a reference emulsion. The HFUT emulsions, which are free of emulsifying surfactants (ES), exhibit a smaller average droplet size and greater viscosity compared to the reference emulsion (RE). However, the absence of ES in the HFUT emulsion does not significantly affect the permeation kinetics of caffeine through reconstructed human epidermis (RHE). The caffeine steady-state flux, lag time, and permeability coefficients differ by only 20%-30%.
INTERNATIONAL JOURNAL OF COSMETIC SCIENCE
(2022)
Review
Chemistry, Analytical
S. Bielfeldt, F. Bonnier, H. J. Byrne, I. Chourpa, Y. Dancik
Summary: The study of human skin is significant in various fields including dermatology, toxicology, pharmacology, and cosmetology. Current measurement methods do not provide chemically specific results regarding skin penetration and permeation. However, Raman microspectroscopy can serve as an alternative method for non-destructive, non-invasive, and chemically specific investigations.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Louise Van Gheluwe, Stephanie David, Eric Buchy, Igor Chourpa, Emilie Munnier
Summary: Nanocarriers (NCs) were prepared from three polymer blends and investigated as smart drug delivery systems (SDDS). The characteristics of the NCs, such as size and drug release kinetics, were found to be influenced by the type of blend and concentration used during nanoprecipitation. The results showed that the redox-responsive blend B2 (ratio 1:3, PLA 5 kDa) exhibited a tripled release of the model payload Nile red (NR) after 24 hours of incubation in a reducing medium. This study highlights the importance of considering both the presence of disulfide bonds and the stability of SDDS in non-stimulating environments for effective drug delivery.
Article
Pharmacology & Pharmacy
Suha Elderderi, Franck Bonnier, Xavier Perse, Hugh J. Byrne, Florent Yvergnaux, Igor Chourpa, Abdalla A. Elbashir, Emilie Munnier
Summary: Raman spectroscopy is a useful technique for quantifying complex cosmetic products without the need for extensive pre-analytical processing. This study demonstrates the effectiveness of Raman spectroscopy coupled with partial least squares regression (PLSR) in quantifying Alginate nanoencapsulated Piperonyl Esters (ANC-PE) in a hydrogel. By dividing the samples into a training set and a test set, the accuracy of the prediction model was evaluated, with a root mean square error of cross-validation (RMSECV) and prediction (RMSEP) of 0.142% and 0.148% (w/w PE), respectively. These results highlight the potential of Raman spectroscopy for rapid and label-free quantification of active cosmetic ingredients in complex formulations, promising future applications in analytical quality control (AQC).
Article
Pharmacology & Pharmacy
Hichem Kichou, Franck Bonnier, Yuri Dancik, Joudi Bakar, Rime Michael-Jubeli, Amanda C. Carita, Xavier Perse, Martin Souce, Laetitia Rapetti, Ali Tfayli, Igor Chourpa, Emilie Munnier
Summary: In Vitro Permeation Testing (IVPT) plays a crucial role in studying skin penetration. Reconstructed human skin and synthetic membranes, such as Strat-M(R), are explored as alternatives to replicate human skin properties. Strat-M(R) demonstrates a closer resemblance to human skin in terms of steady-state fluxes, surpassing the performance of EpiSkin (R) RHE. Strat-M(R) offers a promising approach to enhance realism and reproducibility in dermatological product development.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Chemistry, Physical
Syrine Jebali, Marylene Vayer, Khaled Belal, Fredric Mahut, Christophe Sinturel
Summary: The dip-coating deposition of nanocomposite thin films composed of polyvinylpyrrolidone and silica nanoparticles was studied using atomic force microscopy and scanning electron microscopy. The presence of particles did not affect the film thickness, and no preferential retrieval of particles or polymer occurred during deposition. The behavior of particle distribution differed in thicker and thinner films, indicating competition and interplay between time-dependent phenomena during the dip-coating process.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Analytical
Suha Elderderi, Soukaina Hilali, Laura Wils, Igor Chourpa, Martin Souce, Barbara Clement-Larosiere, Abdalla A. Elbashir, Hugh J. Byrne, Emilie Munnier, Leslie Boudesocque-Delaye, Franck Bonnier
Summary: The study evaluated the feasibility of using ATR-IR and PLSR as a rapid, label-free, and cost-effective tool to quantify water content in extracts from spirulina wet biomass obtained using NADES. The results highlighted the accuracy and reliability of the technique in quantitative analysis, offering powerful alternatives for developing more environmentally responsible analytical protocols.
ANALYTICAL METHODS
(2022)
Article
Chemistry, Physical
Wenjing Tan, Chunmei Gao, Shifeng Ji, Yunqing Xing, Yi Guo, Baogui Liang
Summary: Membrane separation technology is widely used in wastewater treatment due to its cost-effectiveness and productivity. However, organic membrane fouling caused by humic acid is a major barrier to its further development. This study successfully addressed this issue through the production of composite materials and self-cleaning membranes, providing beneficial strategies and solutions for membrane contamination problems.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Qichang Peng, Qingdong Ruan, Bin Wang, Jinyuan Liu, Chao Huang, Xingwang Zhu, Dan Li, Liangliang Liu, Yinchuan Wang, Xiaolin Zhang, Jia Yan, Paul K. Chu, Hui Xu
Summary: The escalating issue of water pollution has led to significant attention in the field of photocatalysis. In this study, OV-Sb2WO6-X photocatalyst with oxygen vacancies was synthesized, which exhibited enhanced charge separation efficiency and improved photocatalytic activity. The introduction of oxygen vacancies was successfully controlled and characterized, and the modified photocatalyst showed superior degradation efficiency for dye wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wangcheng Zhang, Cunchuan Zheng, Hu Xie, Weichao Du
Summary: By using a specific curing agent ETB, the problem of dispersion and stability for oily epoxy resin in cement slurry system has been successfully solved. The application of the emulsified curing agent ETB in oilfield cement slurry system shows good rheological performance, resistance to high temperature and high pressure water loss, and corrosion resistance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
O. I. Krivonos, A. Babenko, O. B. Belskaya
Summary: This study synthesized biochar based on sapropel and investigated the effects of chemical modification on its textural characteristics, acid-base properties, and adsorption properties. The results showed that the chemical modification increased the fraction of micropores, specific surface area, and changed the surface properties of biochar. The experiment also revealed that biochar pretreated with alkali exhibited the maximum adsorption capacity for copper ions. A conceptual model identifying the mechanisms of copper adsorption on sapropel-based biosorbent was proposed.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
H. Lachhab, N. Benzbiria, A. Titi, S. Echihi, M. E. Belghiti, Y. Karzazi, A. Zarrouk, R. Touzani, C. Jama, F. Bentiss
Summary: The corrosion inhibitory potency of two new pyrimidine-pyrazole derivatives, PPA and PPC, was evaluated for mild steel in 1 M HCl. The results showed enhanced inhibition activities with increased concentration, reaching maximal values of 91.15% and 92.39% for PPA and PPC, respectively. However, the mitigation potency decreased with increasing temperature. SEM and XPS analysis revealed that PPA and PPC adsorbed on the mild steel surface, forming a shielding layer that prevented the dissolution of the steel in the acidic solution.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Shanmugapriya Sivalingam, D. Jeya Sundara Sharmila, Goutham Golla, Lakshmanan Arunachalam, Tarunendu Singh, G. Karthikeyan, A. Shanthi, Kannan Malaichamy
Summary: This study aims to develop a nano-biofungicide comprising of volatile essential oil molecules to enhance its efficacy in the field of agriculture through easily scalable green synthesis technique. The nano biofungicide was prepared through one pot hot melt ultrasonication technique with easy water dispersibility and long term stability. The physico-chemical analysis revealed that, nano bio-fungicides were amorphous sphere-shaped nanoparticles with low melting point. The encapsulation efficiency of major components of essential oil was determined, and it was found that they followed Higuchi model of release kinetics. The essential oil loaded nanostructured lipid carrier showed significantly higher mycelial growth inhibition compared to pure essential oil, indicating enhanced bio-efficacy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yinlong Li, Yingqing Zhan, Yiwen Chen, Hongshan Jia, Ximin Chen, Fei Zhu, Xulin Yang
Summary: In this study, ZnO quantum dots decorated MXene nanosheets were used as a functional filler for waterborne epoxy coating. The improved dispersion and synergy of ZnO QDs and MXene nanosheets enhanced the anticorrosion performance of the coating.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Fucheng Guan, Jing Tao, Qiang Yao, Zheng Li, Yihang Zhang, Shi Feng, Jianbin Sun, Qiang Yang, Xuecui Song, Jing Guo, Yuanfa Liu
Summary: This paper presents a method for preparing adsorbent materials based on biomass that can efficiently adsorb methylene blue. The experimental results show that the material has a hierarchical structure, high adsorption capacity, and reusability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Pengfei Hu, Zuli Mo, Weiliang Wang, Chengzhe Li, Zhaojia Guo, Guanqing Lin, Zhimin Guo
Summary: This study developed a novel in-situ particle vision and measurement (PVM) system to investigate heterocoagulation between coarse and fine particles in mineral processing. The experimental results showed that the degree of heterocoagulation decreased with increasing pH and stirring speed. Furthermore, under certain hydrodynamic conditions, coal particles were more distributed at the rear of the glass bead.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Tanveer ul Haq Zia, Anwar ul Haq Ali Shah, Behisht Ara, Kashif Gul
Summary: A label-free immunosensor for detection of hepatitis C core antigen was fabricated using a ternary nanocomposite based on polypyrrole, silver doped zinc oxide, and exfoliated graphene. The immunosensor demonstrated low detection limit, high selectivity, and stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoyan Feng, Jiachen Li, Lijun Liang, Linli Zhu, Sa Liu, Li Ren
Summary: In this study, polystyrene divinylbenzene microspheres were surface-modified by poly(carboxybetaine methacrylate) to develop an efficient hemoperfusion adsorbent for the removal of protein-bound toxins. The modified microspheres showed increased adsorption capacity and better biocompatibility, making them promising for clinical hemoperfusion therapy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoye Bi, Dong Xue, Yunpeng Wang, Chencheng Lv, Zexiong Li, Tao Zhao
Summary: This research aimed to develop a durable and formaldehyde-free flame retardant treatment for cotton fabrics. The results demonstrated successful grafting of phosphorous acid (PA) onto cotton fabrics, leading to enhanced flame resistance while maintaining the desired fabric characteristics.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Ruolin Wang, Wenjuan Sun, Haisheng Han, Dongping Tao
Summary: This study finds that Al-starch colloidal depressants can effectively inhibit the flotation of ultrafine calcite and chlorite, and increase the grade of valuable minerals. The chemisorption of Al-starch on mineral surface changes the functional group peaks and generates new O-Al functional groups.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wondimu K. Wakejo, Ali Maged, Beteley T. Meshesha, Joon W. Kang, Abayneh G. Demesa, Sandip Chakrabarti, Thallada Bhaskar, Ashok Kumar Gupta, Amit Bhatnagar
Summary: Simultaneously removing different pharmaceutical pollutants from wastewater is an important environmental issue, and the use of a system that can remove multiple contaminants at once is necessary. Functionalized biochar (FBC) has been found to be effective in simultaneously removing acetaminophen and ciprofloxacin and other pharmaceutical pollutants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yu Wang, Fengwen Yan, Jie Wu, Zhijun Huang, Liuting Song, Shunda Yuan
Summary: In this study, Cu single atoms are anchored on the external surface of g-C3N4 nanofibers to maximize atom utilization. This catalyst exhibits excellent Fenton-like catalytic activity and good stability due to the full utilization of Cu active sites.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)