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Table 1 Overview of Cd-QDs toxicity on bacteria

From: Microarray analysis of the Escherichia coli response to CdTe-GSH Quantum Dots: understanding the bacterial toxicity of semiconductor nanoparticles

QD Capping layer Microorganism Reported cellular effect Concentration tested Reference
CdSe Carboxyl coated E. coli, Bacillus subtilis, P. aeruginosa Growth inhibition 80 nM [26]
CdTe Cystine E. coli Growth inhibition and ROS generation 10- 40 nM [27]
CdTe 3-mercaptopropionic acid E. coli, P. aeruginosa, Bacillus subtilis, Staphylococcus aureus Membrane damage and ROS generation 200- 300 nM [28]
CdTe Thioglycolic acid, glutathione Cupriavidus metallidurans, E. coli, Shewanella oneidensis, B. subtilis Growth inhibition and bacterial filamentation 1-100 nM [29]
CdSe and CdTe Cysteine and mercaptoacetic acid Photobacterium phosphoreum Affects luminescence metabolism 0,1-800 μg/mL [30]
CdTe Cysteine E. coli, P. aeruginosa, B. subtilis, S. aureus Affects electron transfer 40-100 nM [31]
CdTe Mercaptoacetic acid E. coli Membrane damage 50- 1 000 nM [32]
CdTe Thioglycolic acid E. coli Reduces viability and ROS generation 120 μg/mL [33]
CdTe 3-mercaptopropionic acid E. coli ROS generation 1 mM [15]
CdSe/CdZnS Carboxyl, Polyanionicpolymaleic anhydride-alt-1-octadecene and polycationicpolyethylenimine Pseudomonas stutzeri Affects denitrification process and ROS generation 10-500 nM [34]
CdSe Octadecylamine E. coli No toxicity 0.01-100 μg/mL [35]
CdSe/ZnS Carboxyl coated and uncoated P. aeruginosa Oxidative stress and expression of cadmium efflux systems 20-60 nM [20]
CdTe 3-mercaptopropionic acid E. coli Growth inhibition, membrane damage and cadmium release from QDs 20-120 nM [23]
CdTe 3-mercaptopropionic acid, glutathione, N-acetyl cysteine E. coli Growth inhibition and membrane damage 100-3 000 nM [36]
CdSe/CdS Mercaptosuccinic acid E. coli Oxidative stress and cadmium release from QDs 5-2 000 nM* [37]
  1. *QDs concentrations were determined by using the molar extinction coefficient reported for CdTe or CdSe.