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Rhodamine B-labeled poly(ethylene imine) (PEIR) was synthesized and characterized using UV–vis spectroscopy, dynamic light scattering (DLS) and combining electrophoresis with laser Doppler velocimetry (LDV). DLS studies indicated a mean hydrodynamic diameter of 8.3nm in the presence of 10−2M NaCl. Electrophoretic mobility studies confirmed that PEIR remained cationic for pH below 10. The kinetics...
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