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.

引用

页数：7

共 41 条

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