Fig. 3. FE-TEM images and size histograms of (a and e) CS/AuNPs, (b and f) CS/AuNPs@TDA, and (c and g) CS/AuNPs@TDA with 0.5 mg per L As3+ and (d and h) CS/AuNPs@TDA with 1.0 mg per L As3+. A magnification of 150 000× was applied.
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