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GOn infrared spectrum presented more intense bands assigned to oxygen containing functional groups than observed for rGOn-PEG. GOn C/O proportion decreased significantly more than 50% comparing with rGOn-PEG and nitrogen had been present in the latter (N at per cent = 20.6) because of introduction of PEG-NH2. Thermogravimetric analysis allowed calculating the actual quantity of PEG in rGOn-PEG become of about 56.1%. Simultaneous decrease and PEGylation increased the lateral dimensions from 287 ± 139
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