TEM images for non-cross-linked micelles and czaSCKs deposited from aqueous solutions at different pH values onto carbon-coated copper grids and allowed to dry under ambient conditions: a) non-cross-linked micelles at pH 2; b) non-cross-linked micelles at pH 7.3; c) non-cross-linked micelles at pH 10.5; d) 2% cross-linked czaSCKs at pH 2; e) 5% cross-linked czaSCKs at pH 2; f) 10% cross-linked czaSCKs at pH 2; g) 2% cross-linked czaSCKs at pH 12; h) 5% cross-linked czaSCKs at pH 12; i) 10% cross-linked czaSCKs at pH 12. Samples imaged as a,b,c,e,f,g,h were negatively stained by uranyl acetate; d and i were stained by phosphotungstic acid.