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The block copolymer micelles and natural biopolymers were utilized to form layer-by-layer (LbL) films via electrostatic interaction, which were able to effectively load and controllably release favipiravir, a potential drug for the treatment of coronavirus epidemic. The LbL films demonstrated reversible swelling/shrinking behavior along with the manipulation of temperature, which could also maintain the integrity in the structure and the morphology. Due to dehydration of environmentally responsive building blocks, the drug release rate from the films was decelerated by elevating environmental temperature and ionic strength. In addition, the pulsed release of favipiravir was observed from the multilayer films under the trigger of temperature, which ensured the precise control in the content of the therapeutic reagents at a desired time point. The nanoparticle-based LbL films could be used for on-demandrelease of chemotherapeutic reagents.
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http://dx.doi.org/10.1088/1748-605X/ad2a3b | DOI Listing |
Int J Biol Macromol
September 2025
Biofabrication Research Group, Renato Archer Information Technology Center (CTI), CP 13069-901 Campinas, SP, Brazil; Department of Chemistry, B(5)IDA Research Group, Simon Bolivar University, AP 89000, Caracas, Venezuela.
This study explores strategies to enhance the bioactivity of alginate by grafting individual amino acids-arginine, glycine, and aspartic acid-and their combinations onto the alginate backbone. Inspired by the cell-adhesive RGD sequence, this biomimetic approach aims to systematically investigate individual contributions of each residue-an aspect rarely studied in isolation-while also assessing synergistic effects. This methodology provides a more accessible, reproducible alternative to improve the functional performance of biopolymers, avoiding high cost and synthetic complexity typically associated with full peptide conjugation.
View Article and Find Full Text PDFLangmuir
September 2025
Department of Chemistry, University of Maine, Orono 04469-5706, Maine, United States.
The low cost and high aspect ratio of kaolin has garnered attention toward its application as an oxygen barrier coating. The challenge associated with achieving oxygen barrier properties is, however, obtaining aligned kaolin platelets. We report a simple layer-by-layer (LBL) approach for obtaining highly oriented kaolin films on glass, silicon, and 304 steel substrates.
View Article and Find Full Text PDFACS Omega
August 2025
Department of Biochemistry, Middle East Technical University, Ankara, Cankaya 06800, Türkiye.
There is a need to develop alternative antibacterial agents for antibacterial applications due to the emergence of antibiotic-resistant bacteria. Bacteriophages are natural predators of bacteria and have gained interest as an alternative to antibiotics. The co-delivery of antibacterial agents is an attractive strategy to achieve enhanced antibacterial activity.
View Article and Find Full Text PDFACS Appl Mater Interfaces
August 2025
Department of High Throughput Methods in Photovoltaics, Forschungszentrum Jülich GmbH, Helmholtz-Institute Erlangen-Nürnberg (HI ERN), Immerwahrstraße 2, Erlangen 91058, Germany.
The response surface methodology (RSM) based on a Box-Behnken (BB) design of experiment (DoE) approach was performed, with the central point repeated four times to enhance statistical reliability, to systematically investigate the influence of ultrasonic aerosol jet printing (uAJP) parameters such as speed, flow, and power, while depositing the donor material deposition, on the acceptor/donor ratio and power conversion efficiency (PCE). Efforts were made to tune the D:A ratio to approximately 1:1.2, a composition widely used for the PM6:Y12 active layer system.
View Article and Find Full Text PDFCommun Chem
July 2025
Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India.
Polyelectrolyte multilayer (PEM) thin films, fabricated at nano-scale by Layer-by-Layer (LbL) self-assembly techniques, have diverse nanotechnology applications. Precise thickness measurement during layer buildup is crucial in controlling the thickness. In this work, we present a novel optical measurement technique for in-situ analysis of the PEM film build-up by utilizing Etched Fiber Bragg Gratings (EFBG)-based sensors to quantify the deposited thickness.
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