Figure 1.

The formation of SWCNT and its physical and chemical treatment for use as drug carriers. (A) The schematic illustration of the structure formation of SWCNTs with the two ends closed. (B) The schematic illustration of the strategy for the preparation of the CNT-based drug delivery systems.

Zhang et al. Nanoscale Research Letters 2011 6:555   doi:10.1186/1556-276X-6-555
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