Here we wrapped the MWNT with arginines in noncovalent interactions and detected their dispersion and aggregation at different pH using Fluorophotometer and Atomic Force Microscope. We found that the modified MWNT own strong and sensitive pH-Response and behave better dispersion in higher pH. We also analyzed and discussed the mechanism of pH-Response. This will be of great significance for MWNT to use as drug delivery and sensor in the future.

Key words: MWNT (multi-walled carbon nanotube), arginine, noncovalent interaction, pH-Response