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Phase transitions and morphology control of Langmuir Blodget (LB) films of graphene oxide.
J Colloid Interface Sci
January 2025
Research Center for Photoenergy Harvesting & Conversion Technology (phct), Department of Energy and Materials Engineering, Dongguk University, Seoul 04620, Republic of Korea. Electronic address:
Hypothesis: Understanding the Langmuir film formation process of flexible and soft materials like graphene oxide (GO) is essential, as it shows different trends compared to the conventional surface pressure-area (π-A) and compressional modulus (ε) isotherms of hard materials. Additionally, the size distribution and mechanical properties of the GO are assumed to affect the distinctive Langmuir-Blodgett (LB) film morphologies, such as overlaps and wrinkles.
Experiment: To gain a deeper insights of phase transitions in GO LB films, we propose a novel analysis of elastic tensile modulus versus surface pressure (|ε|-π) isotherms.
Excimer light versus topical methotrexate 1% hydrogel in treatment of scalp psoriasis: clinical and dermoscopic study.
Arch Dermatol Res
January 2025
Dermatology and Venereology Department, Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt.
One of the most frequently impacted locations by psoriasis is the scalp. It is seen in about 80% of psoriasis cases worldwide, and its treatment is challenging. To compare the efficacy and safety of excimer light versus topical methotrexate (MTX) 1% hydrogel in treatment of scalp psoriasis.
View Article and Find Full Text PDFSolvent Engineering in Ligand Exchange of the Hole Transport Layer Enables High-Performance PbS Quantum Dot Solar Cells.
J Phys Chem Lett
January 2025
State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), School of Material Science and Engineering, Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan Rd., Nanjing 210023, China.
The performance of lead sulfide colloidal quantum dot (PbS-CQD) solar cells has long been hindered by interface defects in the transport layer. Traditionally, 1,2-ethanedithiol (EDT), used in solid-state ligand exchange, has been a common choice as the hole transport layer (HTL) in many PbS-CQD solar cells. However, the rapid reaction rate and chain length mismatch (shorter-chain EDT versus longer-chain oleic acid) during the ligand exchange process often introduce crack defects in the HTL film, resulting in an unexpected low performance.
View Article and Find Full Text PDFSpecific Ion Effects in Hydrogels.
Molecules
December 2024
Biomaterials and Bioengineering, Centre de Recherche en Biomédecine de Strasourg, Inserm UMR_S 1121, CNRS EMR 7003, Université de Strasbourg, 1 Rue Eugène Boeckel, F-67000 Strasbourg, France.
Specific ion effects on the structure and function of many biological macromolecules, their associations, colloidal systems, interfacial phenomena, and even "simple" electrolytes solutions are ubiquitous. The molecular origin of such phenomena is discussed either as a salt-induced change of the water structure (the hydrogen bond network) or some specific (solvent mediated) interactions of one or both of the ions of the electrolyte with the investigated co-solute (macromolecules or colloidal particles). The case of hydrogels is of high interest but is only marginally explored with respect to other physico-chemical systems because they are formed through the interactions of gelling agents in the presence of water and the added electrolyte.
View Article and Find Full Text PDFColloid-Forming Prodrug-Hydrogel Composite Prolongs Lower Intraocular Pressure in Rodent Eyes after Subconjunctival Injection.
Adv Mater
January 2025
Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON, M5S 3E5, Canada.
Colloidal drug aggregates (CDAs) are challenging in drug discovery due to their unpredictable formation and interference with screening assays. These limitations are turned into a strategic advantage by leveraging CDAs as a drug delivery platform. This study explores the deliberate formation and stabilization of CDAs for local ocular drug delivery, using a modified smallmolecule glaucoma drug.
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