Department of Chemical Engineering, Texas Materials Institute, and Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712-1062, USA.
Langmuir. 2010 Sep 7;26(17):14241-6. doi: 10.1021/la102124y.
Germanium (Ge) nanowires were produced in solution by supercritical fluid-liquid-solid (SFLS) growth and then functionalized with carboxylic acid groups by in situ thermal thiolation with mercaptoundecanoic acid. Polyethylene glycol (PEG) was grafted to the carboxylic acid-terminated Ge nanowires using carbodiimide coupling chemistry. The nanowires were characterized using attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and transmission electron microscopy (TEM) to confirm the surface modification of the nanowires. Dispersions of PEGylated Ge nanowires in dimethylsulfoxide (DMSO) were stable for days. The PEGylated Ge nanowires were also dispersible in aqueous solution over a wide range of pH and ionic strength.
锗纳米线通过超临界流体-液-固（SFLS）生长在溶液中生成，然后通过巯基十一酸的原位热硫代反应功能化羧酸基团。使用碳二亚胺偶联化学将聚乙二醇（PEG）接枝到羧酸封端的锗纳米线上。通过衰减全反射傅里叶变换红外（ATR-FTIR）光谱和透射电子显微镜（TEM）对纳米线进行了表征，以确认纳米线的表面修饰。PEG 化锗纳米线在二甲基亚砜（DMSO）中的分散体稳定数天。PEG 化锗纳米线在很宽的 pH 值和离子强度范围内也可分散在水溶液中。
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