Article
Chemistry, Multidisciplinary
Haian Qiu, Jeffrey M. Mativetsky
Summary: The study reveals localized nonlinear lattice deformation and nanoscale structural rearrangement in methylammonium lead triiodide films caused by the combined action of light and voltage. These effects are connected with organic cation motion, suggesting that localized cation migration plays a significant role in the instability of perovskite optoelectronic devices under operating conditions.
Article
Chemistry, Multidisciplinary
Hsinhan Tsai, Dibyajyoti Ghosh, Eli Kinigstein, Bogdan Dryzhakov, Honora Driscoll, Magdalena Owczarek, Bin Hu, Xiaoyi Zhang, Sergei Tretiak, Wanyi Nie
Summary: The dynamic structure changes in metal halide perovskite lattice upon photoexcitation and its impact on carrier transport properties in Ruddlesden-Popper phase perovskite thin films are reported in this study. Time-resolved X-ray scattering technique reveals rapid lattice expansion and slow relaxation over 100 ns after photoexcitation. The expansion is attributed to lattice thermal fluctuations caused by photon energy deposition. High laser powers induce strong local structural disorder, increasing the charge dissociation activation energy and leading to localized transport.
Article
Chemistry, Analytical
Xiulan Ling, Xin Chen, Xiaofeng Liu
Summary: Using a finite-difference time-domain method, we conducted a study on the light field intensification in optical films caused by defects with different geometries. The results showed that defects can locally enhance the light intensity in optical films, with spherical defects resulting in the highest intensification. The degree of intensification increases with the diameter of the defect and the relative refractive index between the defect and the film layer, with shallow defects exhibiting the highest intensification. Additionally, the extinction coefficient of the defect significantly affects the light intensification. Our findings reveal that the intensification of the light field induced by nano-defects is mainly due to the interference enhancement of incident light and diffracted or reflected light by defects when the defect size is in the subwavelength range.
Article
Materials Science, Multidisciplinary
S. Sajad Dabiri, Hosein Cheraghchi, Ali Sadeghi
Summary: The study examines the photon-dressed electronic band structure of topological insulator thin films doped by magnetic impurities under the influence of off-resonance time-periodic electromagnetic field. Different phases emerge in the phase diagram depending on the frequency, intensity, and polarization of the light. The existence of quantum anomalous Hall insulator and quantum pseudo-spin Hall insulator phases, as well as anisotropic helical edge states, are confirmed through numerical calculations and analysis of the Hall conductivity and Chern number.
Article
Engineering, Environmental
Susmita Dolai, Anna Vanluchene, Petr Stavarek, Petr Dzik, Radek Fajgar, Karel Soukup, Petr Kluson
Summary: The combination of photocatalysis and micro-flow technology provides a highly capable tool for the design and utilization of functional thin films. The study on graphitic carbon nitride films showed that thin film catalysts immobilized on photo-microreactor walls exhibited significantly higher photoactivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Kim Kuntze, Jani Viljakka, Matti Virkki, Chung-Yang (Dennis) Huang, Stefan Hecht, Arri Priimagi
Summary: By simple synthetic derivatisation, indigo dye can be converted into a red-light E-Z photoswitch, which exhibits negative photochromism and tuneable thermal isomerisation kinetics. This makes indigo derivatives highly attractive for materials and living systems applications. However, the translation of indigo photoswitching dynamics from solution to solid state, which is crucial for most applications, is not well understood. In this study, the photoswitching performance of six structurally distinct indigo derivatives in five polymers of varying rigidity is investigated. Three key strategies are identified to enable efficient photoswitching under red light: choosing a soft polymer matrix, creating free volume around the indigo molecules, and applying low dye loading to inhibit aggregation. Implementation of these strategies leads to isomerisation performance nearly identical to that in solution, paving the way for designing new red-light photochromic materials based on indigos.
Article
Chemistry, Physical
Jun Wu, Guoying Yan, Mingjing Chen, Yuli Xue, Linjie Gao, Jianglong Wang, Shufang Wang
Summary: Ba doping significantly enhances the light-induced transverse thermoelectric effect in BiCuSeO films, leading to higher sensitivity and faster response time. The improvement is attributed to increased Seebeck coefficient anisotropy and decreased film resistivity due to the increase in hole carrier concentration of the Ba-doped films, showing potential application in UV detectors."
APPLIED SURFACE SCIENCE
(2021)
Article
Polymer Science
Mihai Postolache, Dan Gheorghe Dimitriu, Cristina Delia Nechifor, Simona Condurache Bota, Valentina Closca, Dana Ortansa Dorohoi
Summary: A simple method for determining the linear birefringence of thin layers is proposed, which is based on the determination of the orientation of the polarization ellipse of totally polarized light and applied to PVA thin foils. Theoretical notions and experimental procedure are described. The linear birefringence of polymer thin foils with different degrees of stretching is determined and the applicability of the method is discussed.
Article
Nanoscience & Nanotechnology
Pin-Hung Chung, Chia-Tung Kuo, Tzu-Hsuan Wang, You-Yan Lu, Chao- Liu, Tri-Rung Yew
Summary: A highly sensitive trilayer photodetector using Co-doped ZnFe2O4 thin films was successfully synthesized in this study. The devices exhibited outstanding performance with high photosensitivity and fast photoresponse time, making them potentially suitable for photodetector applications in visible light regions.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Organic
Elmars Zarins, Julija Pervenecka, Elina Misina, Oleksandr Bezvikonnyi, Aivars Vembris, Karlis Balodis, Dmytro Volyniuk, Juozas Grazulevicius, Valdis Kokars
Summary: A series of 1H amorphous tri-phenyl pyridine (HAPPY) dyes have been synthesized and it was found that converting a 4H-pyran ring into a 1H-pyridine fragment can increase emission efficiency and reduce amplified spontaneous emission (ASE) thresholds. Further experiments revealed that the best results were achieved in pure neat films without the need for doping in polymer matrices.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Polymer Science
Sebastien Andrieux, Mayur Patil, Leandro Jacomine, Aurelie Hourlier-Fargette, Sascha Heitkam, Wiebke Drenckhan
Summary: Controlling pore connectivity is crucial for the applications of polymer foams, but the scientific phenomena governing the pore-opening processes are not well understood. This research takes inspiration from liquid foams and thin films to develop model experiments in a microfluidic Thin Film Pressure Balance, allowing the investigation of isolated thin films under controlled conditions. The study correlates the evolution of thin films undergoing gelation and drying with the rheological properties of the bulk alginate solution.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Yogesh Sharma, Binod Paudel, Amanda Huon, Matthew M. Schneider, Pinku Roy, Zachary Corey, Rico Schonemann, Andrew C. Jones, Marcelo Jaime, Dmitry A. Yarotski, Timothy Charlton, Michael R. Fitzsimmons, Quanxi Jia, Michael T. Pettes, Ping Yang, Aiping Chen
Summary: This study investigates the relationship between strain engineering, point defects, and ferromagnetism in actinide epitaxial thin films, and provides new insights into the influence of coupled order parameters on the emergent properties of actinide materials.
Article
Engineering, Electrical & Electronic
Ryunosuke Takahashi, Takuo Ohkochi, Daisuke Kan, Yuichi Shimakawa, Hiroki Wadati
Summary: Using a magneto-optical Kerr effect (MOKE) microscope, we observed laser-induced magnetization switching in ferrimagnetic oxide NiCo2O4 (NCO) epitaxial thin films with perpendicular magnetic anisotropy. Laser pulses at 1030 nm were used to irradiate the NCO thin film at different temperatures (300-400 K) while altering the parameters of pulse interval, fluence, and the number of pulses in the absence of an external magnetic field. We observed accumulative all-optical helicity-dependent switching above 380 K. Our observation of oxide NCO thin films facilitates magnetization switching using ultrafast lasers without the need for a magnetic field.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
M. F. Al-Kuhaili, M. B. Mekki
Summary: Photocoloration refers to the change in color of a transparent material exposed to UV light, with the effect being enhanced by UV lasers. The color change is influenced by the structural and chemical properties of the material, leading to variations in optical properties. Molybdenum oxide shows a superior coloration response to UV radiation, with its absorption bands and valence states analyzed to understand the coloration mechanisms.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Loic Desbordes, Agnes Grandjean, Fabien Frances, Helene Lorcet, Sylvain Faure
Summary: Xanthan gum is commonly used to stabilize aqueous foams and slow foam drainage in various commercial and industrial processes. The delay in drainage is attributed to liquid retention caused by the confinement of xanthan molecules in Plateau borders, leading to an increase in local yield stress. When bubbles and Plateau borders reach a certain size threshold, liquid begins to flow through the foam, initiating drainage.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Andreas D. Ludwig, Arnaud Saint-Jalmes, Cristelle Meriadec, Franck Artzner, Olivier Tasseau, Fabienne Berree, Loic Lemiegre
CHEMISTRY-A EUROPEAN JOURNAL
(2020)
Article
Optics
R. Castro-Beltran, L. Garnier, A. Saint-Jalmes, H. Lhermite, H. Cormerais, A-L Fameau, E. Gicquel, B. Beche
OPTICS COMMUNICATIONS
(2020)
Review
Chemistry, Physical
Florence Elias, Jerome Crassous, Caroline Derec, Benjamin Dollet, Wiebke Drenckhan, Cyprien Gay, Valentin Leroy, Camille Nous, Juliette Pierre, Arnaud Saint-Jalmes
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2020)
Article
Chemistry, Physical
Ming Yu, Cecile Le Floch-Fouere, Ludovic Pauchard, Francoise Boissel, Nan Fu, Xiao Dong Chen, Arnaud Saint-Jalmes, Romain Jeantet, Luca Lanotte
Summary: This study investigates the skin formation process in droplets containing whey proteins and casein micelles, shedding light on competitive drying mechanisms in colloidal systems. The results contribute to a better understanding of the process and may have potential implications for milk powder production optimization in the dairy industry.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Physics, Multidisciplinary
Benjamin Reichert, Jean-Benoit Le Cam, Arnaud Saint-Jalmes, Giuseppe Pucci
Summary: The study demonstrates the self-propulsion mechanism of a volatile drop on the surface of an immiscible liquid through the conversion of evaporative heat pumping into directed motion. The propulsive force is generated by convection-sustained temperature gradients along the drop interface, leading to the advection of a warmer pool of liquid by the hydrodynamic flow in the underlying bath toward the back of the drop. The dependence of the drop speed on the evaporation flux is derived and experimentally validated.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Raphael Poryles, Theo Lenavetier, Emmanuel Schaub, Adrien Bussonniere, Arnaud Saint-Jalmes, Isabelle Cantat
Summary: The elasticity of foam film plays a crucial role in its dynamic properties. It depends on the composition of the foaming solution and is different from the interface elasticity measured in unconfined geometries. This study uses a deformable frame to measure the tension and extension of multiple films and finds that Mysel's model coupled with a Langmuir coadsorption isotherm accurately reproduces the nonlinear elastic behavior.
Article
Engineering, Mechanical
Che Zhan, A. Saint-Jalmes, M. Receveur, H. El Bahi, F. Rondelez, V Leroy
Summary: This article discusses the aeration issue in lubricating oils and emphasizes the importance of using deaerating agents. By incorporating ultrasonic probes into the experiments, the authors are able to measure both the gas volume fraction and bubble size during the aeration process. This measuring technique provides new insights into the dynamics of aeration and de-aeration.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Chemistry, Physical
Leslie A. Labarre, Arnaud Saint-Jalmes, Daniele Vigolo
Summary: This article investigates the impact of nanobubbles on the interfacial and foaming properties of surfactant solutions. Nanobubbles are formed in the solutions using a microfluidic device and foams are generated. The study reveals that nanobubbles have effects on various measured quantities, with the most significant being their enhancement of foaming in solutions with initially poor foamability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Biochemistry & Molecular Biology
Carolina Dari, Fabrice Cousin, Clemence Le Coeur, Thomas Dubois, Thierry Benezech, Arnaud Saint-Jalmes, Anne-Laure Fameau
Summary: There is increased interest in using fatty acid soaps as surfactants. In this study, the self-assembly and foaming properties of R-10-HSA soap were investigated for the first time. The behavior of R-10-HSA soap was compared with that of 12-HSA soap. Stable foams based on R-10-HSA soap were found to be effective for cleaning applications.
Article
Chemistry, Multidisciplinary
Andreas D. Ludwig, Viktoriia Gorbunova, Arnaud Saint-Jalmes, Fabienne Berree, Loic Lemiegre
Summary: Low molecular weight organogelators, such as phenylboronate alkylglucosides, have found applications in various fields and can form water-sensitive gels. This study focused on the impact of the position of alkyl and phenyl moieties in these structures, and synthesized and studied different counterparts. Rheology and electron microscopy were used to characterize the obtained organogels in toluene and ethyl myristate, and the disruption rates of these gels by water were determined. The results showed that alkylboronate alkylglucosides were not effective gelators, while derivatives with a phenyl ring were good organogelators, although alkylboronates had higher water sensitivities than phenyl counterparts. Therefore, this work expands the scope of glucoside-boronate organogelators and their potential applications in drug delivery systems.
Article
Chemistry, Physical
Arnaud Saint-Jalmes, Corentin Tregouet
Summary: This study investigates the impact of continuous flow on the coarsening dynamics of foams and introduces a new experimental protocol to monitor the relative variation of bubble size over time. The results show that the coarsening rate of foam is strongly affected by the applied shear rate, with a continuous reduction above a critical shear rate. This reduction is attributed to the out-of-equilibrium and shear-dependent film thickness.
Article
Chemistry, Physical
Jean-Paul Douliez, Anais Arlaut, Laure Beven, Anne-Laure Fameau, Arnaud Saint-Jalmes
Summary: Water-in-oil-in-water emulsions (W/O/W) are emulsions where water droplets are embedded within oil droplets dispersed in a continuous water phase. This study describes a one-step method using hydrophilic polymers dispersed in polar oils to generate osmose-induced diffusion of water into oil droplets, forming polymer-rich aqueous droplets. The method allows for adjusting the water diffusion amplitude by varying the polymer concentration and enables the production of high internal phase emulsions. Additionally, a pH-induced transition from multiple to single core double emulsion was achieved. This method has potential applications in microencapsulation and materials chemistry.
Article
Chemistry, Physical
Andreas D. Ludwig, Noemie Ourvois-Maloisel, Arnaud Saint-Jalmes, Franck Artzner, Jean-Paul Guegan, Olivier Tasseau, Fabienne Berree, Loic Lemiegre
Summary: In this study, a series of (arylboronate alkylglucoside)-based organogelators were evaluated for their water-sensitivity. The relationship between the conformation of arylboronate and the effectiveness of gelation was established. The gels were characterized by rheometry, SEM, and SAXS, and their water-sensitivity was found to be influenced by the length of the alkyl chain.
Proceedings Paper
Engineering, Electrical & Electronic
L. Garnier, H. Lhermite, Timothee Labouret, A. St Jalmes, H. Cormerais, V. Vie, B. Beche
Summary: This study focuses on the development of sensors based on integrated photonics and resonator elements for monitoring the sedimentation and drying processes of different blood samples. The study shows that the produced sensors can accurately measure the viscosity and sedimentation rates of blood samples, and can distinguish between different blood characteristics.
OPTICAL SENSING AND DETECTION VII
(2022)
Proceedings Paper
Engineering, Manufacturing
L. Garnier, R. Castro-Beltran, A. Saint-Jalmes, H. Lhermite, A-L Fameau, V. Vie, E. Gicquel, H. Cormerais, B. Beche
INTEGRATED PHOTONICS PLATFORMS: FUNDAMENTAL RESEARCH, MANUFACTURING AND APPLICATIONS
(2020)
Article
Chemistry, Physical
Yiping Yin, Zhe Wang, Hua Zou
Summary: This study presents a novel method for preparing dimpled polymer-silica nanocomposite particles using interfacial swelling-based seeded polymerization. The optimized conditions allow for a relatively high percentage of dimpled particles to be achieved.
Article
Chemistry, Physical
Brenden D. Hoehn, Elizabeth A. Kellstedt, Marc A. Hillmyer
Summary: Porous materials with nanometer-scale pores have important applications as nanoporous membranes. In this study, ABA triblock copolymers were used as precursors to produce nanoporous polymeric membranes (NPMs) in thin film form by degrading the end blocks. Polycyclooctene (PCOE) NPMs with tunable pore sizes were successfully prepared using solvent casting technique. Oxygen plasma etching was employed to improve the surface porosity and hydrophilicity of the membranes. This study provides a straightforward method to produce tough NPMs with high porosity and hydrophilic surface properties.
Article
Chemistry, Physical
Vladislav S. Petrovskii, Stepan I. Zholudev, Igor I. Potemkin
Summary: This article investigates the behavior of linear and ring polypeptide chains in aqueous solution and explores the properties of the complexes formed by these chains with oppositely charged surfactants. The results demonstrate that the complexes of linear supercharged unfolded polypeptides and the corresponding surfactants exhibit impressive adhesive properties.
Article
Chemistry, Physical
Merve Cevik, Serkan Dikici
Summary: Cardiovascular diseases are a leading cause of death globally, and vascular grafts are a promising treatment option. This study focuses on tissue-engineered vascular grafts (TEVGs) using decellularized parsley stems as a potential biomaterial. The decellularized parsley stems showed suitable properties for TEVGs, providing a suitable environment for human endothelial cells to form a pseudo endothelium. This study showcases the potential of using parsley stems for TEVGs.
Article
Chemistry, Physical
Gustavo A. Vasquez-Montoya, Tadej Emersic, Noe Atzin, Antonio Tavera-Vazquez, Ali Mozaffari, Rui Zhang, Orlando Guzman, Alexey Snezhko, Paul F. Nealey, Juan J. de Pablo
Summary: The optical properties of liquid crystals are typically controlled by electric fields. In this study, we investigate the effects of microfluidic flows and acoustic fields on the molecular orientation and optical response of nematic liquid crystals. We identify several previously unknown structures and explain them through calculations and simulations. These findings hold promise for the development of new systems combining sound, flow, and confinement.
Article
Chemistry, Physical
Xinjun Wu, Xin Guan, Shushu Chen, Jiangpeng Jia, Chongyi Chen, Jiawei Zhang, Chuanzhuang Zhao
Summary: This research presents a novel shape memory hydrogel with a remodelable permanent shape and programmable cold-induced shape recovery behavior. The hydrogel is prepared using specific treatment methods to achieve shape fixation by heating and shape recovery by cooling. Additionally, deformable devices can be obtained by assembling hydrogel blocks with different concentrations.
Article
Chemistry, Physical
Rebecca Hengsbach, Gerhard Fink, Ulrich Simon
Summary: This study examines the properties of DNA functionalized pNipmam microgels and pure pNipmam microgels at different concentrations of sodium chloride and in PBS solutions using temperature dependent H-1-NMR measurements. The results show that DNA modification affects the volume phase transition temperature and the addition of salt and PBS further enhances this effect.
Article
Chemistry, Physical
Ningyi Li, Junhong Li, Lijingting Qing, Shicheng Ma, Yao Li, Baohui Li
Summary: This paper investigates the self-assembly behavior of colloids with competing interactions under spherical confinement and finds that different ordered structures can be formed under different sized spherical confinements. Moreover, more perforated structures are formed in smaller spheres.