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Nanotechnol."],"accepted":{"date-parts":[[2023,3,16]]},"abstract":"<jats:p>In the present work, the bottom-up fabrication of biohybrid materials using a nanoarchitectonics approach has been applied to entrap living cells. Unicellular microorganisms, that is, cyanobacteria and yeast cells, have been immobilized in silica and silicate-based substrates organized as nanostructured materials. In a first attempt, matrices based on bionanocomposites of chitosan and alginate incorporating sepiolite clay mineral and shaped as films, beads, or foams have been explored for the immobilization of cyanobacteria. It has been observed that this type of biohybrid substrates leads to serious problems regarding the long-time survival of the encapsulated microorganisms. Alternative procedures using silica-based matrices with low sodium content, generated by sol\u2013gel methods, as well as pre-synthesised yolk\u2013shell bionanohybrids have been studied subsequently. Optical microscopy and SEM confirm that the silica shell microstructures provide a reduced contact between cells. The inorganic matrix increases the survival of the cells and maintains their bioactivity. Thus, the encapsulation efficiency is improved compared to the approach using a direct contact of cells in a silica matrix. Encapsulated yeast produced ethanol over a period of several days, pointing out the useful biocatalytic potential of the approach and suggesting further optimization of the present protocols.<\/jats:p>","DOI":"10.3762\/bjnano.14.43","type":"journal-article","created":{"date-parts":[[2023,4,25]],"date-time":"2023-04-25T08:22:03Z","timestamp":1682410923000},"page":"522-534","source":"Crossref","is-referenced-by-count":6,"title":["Nanoarchitectonics to entrap living cells in silica-based systems: encapsulations with yolk\u2013shell and sepiolite 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