A novel method for the functionalization of γ-irradiated single wall carbon nanotubes with DNA

被引：29
作者：
Jovanovic, S. P. [1 ]
Markovic, Z. M. [1 ]
Kleut, D. N. [1 ]
Romcevic, N. Z. [2 ]
Trajkovic, V. S. [3 ]
Dramicanin, M. D. [1 ]
Markovic, B. M. Todorovic [1 ]
机构：
[1] Vinca Inst Nucl Sci, Belgrade 11001, Serbia
[2] Inst Phys, Belgrade 11001, Serbia
[3] Univ Belgrade, Sch Med, Inst Microbiol & Immunol, Belgrade, Serbia
来源：
NANOTECHNOLOGY | 2009年 / 20卷 / 44期
关键词：
RADIOLYSIS; RAMAN; NANOMEDICINES; SCIENCE; WATER; FIELD;
D O I：
10.1088/0957-4484/20/44/445602
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work we describe a novel method for highly efficient functionalization of single wall carbon nanotubes (SWCNTs) by DNA wrapping. Exposure of SWCNTs to gamma-irradiation (50 kGy) has lowered by one order of magnitude the amount of single stranded deoxyribonucleic acid (ssDNA) required for SWCNT modification. The resulting hybrids of gamma-irradiated SWCNTs and ssDNA were characterized by optical absorbance spectroscopy, Raman spectroscopy and Fourier transform infrared spectroscopy. Atomic force microscopy was used to investigate the morphology of hybrids. While gamma-irradiation in three different media has significantly improved the process of SWCNT dispersion, irradiation in ammonia was the most efficient. The gamma-irradiated SWCNTs functionalized with ssDNA were stabilized by electrostatic forces. This preliminary study suggests that gamma-irradiation can significantly improve the functionalization of SWCNTs with DNA.
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收藏
页数：7
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