Deposition of silver nanoparticles on dendrimer functionalized multiwalled carbon nanotubes: synthesis, characterization and antimicrobial activity.
Deposition of silver nanoparticles on dendrimer functionalized multiwalled carbon nanotubes: synthesis, characterization and antimicrobial activity.
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DOI：
10.1166/jnn.2011.3756
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发表时间：
2011-04
影响因子：
--
通讯作者：
Oki A
中科院分区：
文献类型：
--
作者：
Neelgund GM;Oki A
成功合成了由银纳米粒子和芳香族聚酰胺功能化的多壁碳纳米管（MWCNTs）组成的纳米杂化物，并测试了其对不同病原体的抗菌活性。在沉积银纳米粒子之前，将经过酸处理的多壁碳纳米管（MWCNTs-COOH）依次与对苯二胺和甲基丙烯酸甲酯反应，通过迈克尔加成和酰胺化在多壁碳纳米管表面形成一系列端氨基芳香聚酰胺树枝状大分子。功能化多壁碳纳米管（f-MWCNTs）表面上高丰度的胺基的存在为AgNO 3水溶液还原形成银纳米颗粒提供了场所。在所得的f-MWCNTs-Ag纳米杂化物中形成的银纳米颗粒被确定为面心立方（fcc）对称。采用紫外-可见光谱（UV-vis）、傅里叶变换红外光谱（FTIR）、粉末X射线衍射（XRD）、拉曼光谱（Raman）和热重分析（TGA）等方法对f-MWCNTs和f-MWCNTs-Ag纳米杂化物的结构和性质进行了表征。通过扫描电镜（SEM）和透射电镜（TEM）研究了f-MWCNTs的分散状态和银纳米粒子在f-MWCNTs表面的固定情况。通过能量色散X射线光谱（EDS）测定了f-MWCNTs-Ag纳米杂化物的元素组成。测定了f-MWCNTs-Ag纳米杂化物对大肠杆菌的抗菌活性。coli、铜绿假单胞菌和S. aureu，并与MWCNTs-COOH和f-MWCNTs进行了比较。结果表明，多壁碳纳米管与芳香族聚酰胺树枝状大分子的功能化和连续沉积的银纳米粒子可以发挥重要作用，在增强的抗菌活性。
The nanohybrids composed of silver nanoparticles and aromatic polyamide functionalized multiwalled carbon nanotubes (MWCNTs) is successfully synthesized and tested for their antibacterial activity against different pathogens. Prior to deposition of silver nanoparticles, acid treated MWCNTs (MWCNTs-COOH) were successively reacted with p-phenylenediamine and methylmethacrylate to form series of NH2-terminated aromatic polyamide dendrimers on the surface of MWCNTs through Michael addition and amidation. Existence of high abundance of amine groups on the surface of functionalized MWCNTs (f-MWCNTs) provided sites for formation of silver nanoparticles by the reduction of aqueous solution of AgNO3. The silver nanoparticles formed in the resulted f-MWCNTs-Ag nanohybrids were determined to be face centered cubic (fcc) symmetry. The structure and nature of f-MWCNTs and f-MWCNTs-Ag nanohybrids were characterized by UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction analysis (XRD), Raman spectroscopy and thermogravimetric analysis (TGA). The dispersion state of f-MWCNTs and immobilization of silver nanoparticles on the surface of f-MWCNTs were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Elemental composition of f-MWCNTs-Ag nanohybrids was determined by energy dispersive X-ray spectroscopy (EDS). The antimicrobial activity of f-MWCNTs-Ag nanohybrids were estimated against E. coli, P. aeruginosa and S. aureu and compared with MWCNTs-COOH and f-MWCNTs. The results indicate that functionalization of MWCNTs with aromatic polyamide dendrimers and successive deposition of Ag nanoparticles could play an important role in the enhancement of antimicrobial activity.
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影响因子：
10.8
作者：
Lesniak, W;Bielinska, AU;Balogh, LP
通讯作者：
Balogh, LP
影响因子：
6.2
作者：
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11.2
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13.3
作者：
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Baker, James R., Jr.
影响因子：
3.3
作者：
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