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Chemical imaging of single anisotropic polystyrene/poly (methacrylate) microspheres with complex hierarchical architecture

  • Monodisperse polystyrene spheres are functional materials with interesting properties, such as high cohesion strength, strong adsorptivity, and surface reactivity. They have shown a high application value in biomedicine, information engineering, chromatographic fillers, supercapacitor electrode materials, and other fields. To fully understand and tailor particle synthesis, the methods for characterization of their complex 3D morphological features need to be further explored. Here we present a chemical imaging study based on three-dimensional confocal Raman microscopy (3D-CRM), scanning electron microscopy (SEM), focused ion beam (FIB), diffuse reflectance infrared Fourier transform (DRIFT), and nuclear magnetic resonance (NMR) spectroscopy for individual porous swollen polystyrene/poly (glycidyl methacrylate-co-ethylene di-methacrylate) particles. Polystyrene particles were synthesized with different co-existing chemical entities, which could be identified and assigned to distinct regions of the same particle. The porosity was studied by a combination of SEM and FIB. Images of milled particles indicated a comparable porosity on the surface and in the bulk. The combination of standard analytical techniques such as DRIFT and NMR spectroscopies yielded new insights into the inner structure and chemical composition of these particles. This knowledge supports the further development of particle synthesis and the design of new strategies to prepare particles with complex hierarchical architectures.

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Author of HS ReutlingenWagner, Alexandra; Bredfeldt, Jan-Erik; Steinbach, Julia; Mukherjee, Ashutosh; Kandelbauer, Andreas; Brecht, Marc
Erschienen in:Polymers
Place of publication:Basel
Document Type:Journal article
Publication year:2021
Tag:Raman microscopy; anisotropic polymer particles; chemical imaging; correlative microscopy; hierarchical particles
Page Number:10
First Page:1
Last Page:10
Article Number:1438
DDC classes:540 Chemie
Open access?:Ja
Licence (German):License Logo  Creative Commons - CC BY - Namensnennung 4.0 International