Fig. 2: Light-driven Cu2-xSe NPs assembly by the S. oneidensis-Se0 hybrid and the characteristics of the biogenic Cu2-xSe NPs.
A Schematic diagram shows the synthesis of Cu2-xSe by the S. oneidensis-Se0 hybrid or cell-inactivated lysed hybrid with/without illumination. B Time-resolved precipitated copper concentration by the S. oneidensis-Se0 hybrid and cell-inactivated lysed hybrid with/without illumination. After 5 h of Cu(II) treatment, (C) UV-vis-NIR absorption spectra and (D) temperature rise (ΔT) of hybrid and lysed hybrid with/without illumination. E SEM image and the corresponding EDS mapping images of (F) Se and (G) Cu elements of the photosynthesized S. oneidensis-Cu2-xSe nanoparticles. The above experiments were performed in the mineral salt medium with 20 mM sodium acetate. The data points represented in (B) represent three (n = 3) and in (D) represent six (n = 6) independent experiments for each experimental group and are displayed as mean ± standard deviation (SD). p values of (D) were determined by a one-way analysis of variance. “****” represents p < 0.0001. Experiments of (E) were repeated three times with similar results. Source data and frequency inference statistics (the value of degrees of freedom, p, effect size statistic, 95% confidence intervals) are provided as a Source Data file.
