Dispersibility improvement of gold/iron-oxide composite nanoparticles by polyethylenimine modification
Dispersibility improvement of gold/iron-oxide composite nanoparticles by polyethylenimine modification
复制标题
DOI：
10.1016/j.jmmm.2009.02.050
复制
发表时间：
2009-05-01
影响因子：
2.7
通讯作者：
Yamamoto, Takao A.
中科院分区：
文献类型：
--
作者：
Seino, Satoshi;Matsuoka, Yu;Yamamoto, Takao A.
通过声化学方法合成金/氧化铁复合纳米粒子，然后用聚乙烯亚胺（PEI）对其表面进行修饰。 PEI改性提高了复合纳米粒子在酸性溶液中的分散性。该复合纳米颗粒特异性吸附含硫氨基酸，并且可以被外部磁场拾取。因此，PEI 改性的复合纳米粒子既具有键合 Au-S 的能力，又具有在缓冲溶液中良好分散的能力。 (C) 2009 Elsevier B.V. 保留所有权利。
Composite gold/iron-oxide nanoparticles were synthesized by a sonochemical process and their surface then modified with polyethylenimine (PEI). The dispersibility of the composite nanoparticles in acidic solution was improved by the PEI modification. The composite nanoparticles specifically adsorbed sulfur-containing amino acids and could be picked up by an external magnetic field. Thus, composite nanoparticles modified with PEI carry both the ability to bond Au-S and to disperse well in buffer solutions. (C) 2009 Elsevier B.V. All rights reserved.