Abstract
The manipulation of physicochemical and biological properties of the encapsulated cells by cell surface engineering technique is now attracting more and more researchers’ interest. In this study, we showed a mild and highly efficient way to build a type of polymer-living cell conjugates based on photoinduced electron transfer-reversible addition-fragmentation chain-transfer polymerization (PET-RAFT). The polymerization could proceed at room temperature under the blue light initiating and showed very less influence on the activity of the living cells. Significantly, the constructed positively charged polymer-living cell conjugates could aggregate with the negatively charged native Chlorella pyrenoidosa (CP) cell to form a microscale aggregate which then allowed a functionality switching of the encapsulated CP cells from the normal photosynthetic O2 towards H2 production with an average rate of 0.26 μmol H2h−1 (mg chlorophyll)−1 for 42 h. It is then anticipated that the method we show could contribute an effective way for generating different functionalized living cell-polymer hybrid structures on demand, and the demonstrated aggregation-induced functionality switching of the CP cells is also anticipated to inspire more applications of the cell-based materials towards biology green energy.
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