Stimuli-responsive polymeric nanostructures are compelling vectors for a wide range of application opportunities. The objective we sought was to broaden the array of self-assembling amphiphilic copolymers with stimuli-responsive characteristics by introducing a hydrophilic tunable monomer, (2-dimethylamino)ethyl methacrylate (DMAEMA), together with a hydrophilic one, lauryl methacrylate (LMA), within linear and branched copolymer topologies. Size exclusion chromatography was used to evaluate the resultant linear and hyperbranched copolymers' molecular weight and dispersity, and FT-IR and H-NMR spectroscopy techniques were used to delineate their chemical structure. The structural changes in the obtained self-organized supramolecular structures were thoroughly investigated using aqueous media with varying pH and salinity by dynamic light scattering (DLS), fluorescence spectroscopy (FS), and transmission electron microscopy (TEM). The nanoscale assemblies formed by the amphiphiles indicate significant potential for applications within the field of nanotechnology.
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http://dx.doi.org/10.3390/polym17050701 | DOI Listing |
Polymers (Basel)
March 2025
Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece.
Stimuli-responsive polymeric nanostructures are compelling vectors for a wide range of application opportunities. The objective we sought was to broaden the array of self-assembling amphiphilic copolymers with stimuli-responsive characteristics by introducing a hydrophilic tunable monomer, (2-dimethylamino)ethyl methacrylate (DMAEMA), together with a hydrophilic one, lauryl methacrylate (LMA), within linear and branched copolymer topologies. Size exclusion chromatography was used to evaluate the resultant linear and hyperbranched copolymers' molecular weight and dispersity, and FT-IR and H-NMR spectroscopy techniques were used to delineate their chemical structure.
View Article and Find Full Text PDFAnal Chem
March 2025
College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350116, China.
Herein, we present an innovative electrochemiluminescence (ECL) biosensor for the ultrasensitive detection of -nitrosodimethylamine (NDMA). The biosensor utilizes a triple signal amplification strategy, combining rolling circle amplification (RCA), CRISPR/Cas12a-driven hyperbranched rolling circle amplification (HRCA), and electrostatic repulsion with size exclusion effects from vertically ordered mesoporous silica film (VMSF)/indium tin oxide (ITO) on double-stranded DNA (dsDNA)-Ru(phen) complexes. In this system, aptamers and circular DNA undergo RCA reactions, followed by the CRISPR/Cas12a-mediated HRCA process, producing abundant dsDNA.
View Article and Find Full Text PDFACS Appl Mater Interfaces
March 2025
Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, 141/143 Pomorska Street, Lodz 90-236, Poland.
The severe side effects of systemic chemotherapy for cervical cancer encourage the use of topical intravaginal drug delivery systems. 5-fluorouracil, 5-FU, is an anticancer drug accepted in clinical use in the cancer therapy of colorectal, gastric, and hepatocellular carcinoma. However, it shows low activity against cervical cancer cells (HeLa) and thus requires the usage of additional drugs to support the therapy, which is associated with side effects.
View Article and Find Full Text PDFFood Chem
May 2025
Guangxi Key Laboratory of Fruits and Vegetables Storage-processing Technology, Guangxi Academy of Agricultural Sciences, Nanning 530007, China. Electronic address:
Modification of wine bitterness is subtle and complex. To investigate the mechanism underlying the differences in the initial bitter inhibition of grape seed extract (MOPC) by mannoproteins (MPs), the molecular interactions between MPs from different chain conformations and MOPC at different concentrations were analyzed using methylation, laser light scattering, rheological behavior analysis, and spectral techniques. The results indicated that MPs with linear hyperbranched structures at low concentrations (0.
View Article and Find Full Text PDFNanoscale
January 2025
School of Chemistry and Materials Science, Ludong University, Yantai 264025, China.
Gold nanoparticles (AuNPs) have been widely used as efficient and environmentally friendly catalysts due to their high specific surface area and abundant active sites. However, AuNP-based catalytic systems face several challenges, including the instability of AuNPs during the reaction, the difficulty in monitoring the process, which can easily result in insufficient reaction due to short reaction time or waste of resources due to long reaction time, as well as issues of catalyst recovery. This study proposes a novel catalyst integrating various functions, such as high stability, the capacity for real-time monitoring of the catalytic process, and rapid recycling.
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