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• W2335384066 startingPage "21397" @default.
• W2335384066 abstract "Chitosan-based nanoparticles (NPs) are widely used in drug and gene delivery, therapy, and medical imaging, but a molecular-level understanding of the internal morphology and nanostructure size, interface, and dynamics, which is critical for building fundamental knowledge for the precise design and efficient biological application of the NPs, remains a great challenge. Therefore, the availability of a multiscale (0.1–100 nm) and nondestructive analytical technique for examining such NPs is of great importance for nanotechnology. Herein, we present a new multiscale solid-state NMR approach to achieve this goal for the investigation of chitosan–poly(N-3-acrylamidophenylboronic acid) NPs. First, a recently developed 13C multiple cross-polarization magic-angle spinning (MAS) method enabled fast quantitative determination of the NPs’ composition and detection of conformational changes in chitosan. Then, using an improved 1H spin-diffusion method with 13C detection and theoretical simulations, the internal morphology and nanostructure size were quantitatively determined. The interfacial coordinated interaction between chitosan and phenylboronic acid was revealed by one-dimensional MAS and two-dimensional (2D) triple-quantum MAS 11B NMR. Finally, dynamic-editing 13C MAS and 2D 13C–1H wide-line separation experiments provided details regarding the componential dynamics of the NPs in the solid and swollen states. On the basis of these NMR results, a model of the unique nanostructure, interfacial interaction, and componential dynamics of the NPs was proposed." @default.
• W2335384066 created "2016-06-24" @default.
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• W2335384066 date "2014-11-19" @default.
• W2335384066 modified "2023-10-14" @default.
• W2335384066 title "Probing the Nanostructure, Interfacial Interaction, and Dynamics of Chitosan-Based Nanoparticles by Multiscale Solid-State NMR" @default.
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• W2335384066 doi "https://doi.org/10.1021/am5064052" @default.
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• W2335384066 hasPublicationYear "2014" @default.
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