Fig. 5
Binding of van-PDA-MNPs with bacteria. a SEM images of bacteria captured by van-PDA-MNPs. The capturing efficiency of van-PDA-MNPs and van-SiO2-MNPs for different species of bacteria in PBS (b) and blood (c) was analysed using the colony counting method. The capture efficiency was calculated based on the initial number of bacteria in the sample and the number of uncaptured bacteria cells in the eluent sample. Preconcentration fold in PBS (d) and blood (e). The preconcentration fold was estimated based on the capture efficiency and initial and final sample volume ratio. Student’s t-test, ***: P < 0.001. **: P < 0.01.*: P < 0.05. n = 3