Nano Archive

Adsorption and desorption of doxorubicin on oxidized carbon nanotubes

Wang, Yunxia and Yang, Sheng-Tao and Wang, Yanli and Liu, Yuanfang (2012) Adsorption and desorption of doxorubicin on oxidized carbon nanotubes. sciencedirect, 97 . pp. 62-69. ISSN 0927-7765

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Carbon nanotubes (CNTs) show promise as nano-drug carriers. To develop the CNT-based drug delivery systems, drug loading and release are two major issues. In this study, we systematically evaluated the adsorption and desorption of doxorubicin (DOX)on oxidized multi-walled CNTs (O-MWCNTs). Our results indicated that O-MWCNTs possessed a huge adsorption capacity for DOX (9.45 x 10(3) mg/g). Although the adsorption process was quite slow, the adsorption capacity kept high enough for the therapy while shortening the incubation time to 2 h (1.03 x 10(3) mg/g). The desorption of DOX from O-MWCNTs scarcely occurred while incubated in buffer solution at both pH 7.4 and pH 5.5, however, the lower pH did benefit the desorption. The presence of serum proteins facilitated the desorption of DOX significantly, because these proteins bound strongly to O-MWCNTs resulting in the partial surface of O-MWNCTs being occupied. Moreover, the adsorption time also affected the release of DOX from O-MWCNTs. Shortening the incubation time benefited the release of DOX. The implications to the drug loading and therapeutics of the CNT-based drug delivery systems are discussed.

Item Type:Article
Subjects:Material Science > Bio materials
Material Science > Nanostructured materials
ID Code:11929
Deposited By:CSMNT
Deposited On:23 Sep 2012 13:32
Last Modified:23 Sep 2012 13:32

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