کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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610354 | 880647 | 2009 | 5 صفحه PDF | دانلود رایگان |

Water-soluble and carboxyl-functionalized up-converting rare-earth nanoparticles (UCNPs) are obtained via an efficient surface–ligand-exchange procedure. Hexanedioic acid molecules are employed to replace the original hydrophobic ligands in diethylene glycol solvent at high temperature. Various characterizations indicate the ligand-exchange process has negligible adverse effect on the quality of the UCNPs. The resulting hydrophilic UCNPs show small size, strong up-converting emission and high water stability. The specific molecular recognition capacity of avidin-modified hydrophilic UCNPs confirms that hydrophilic UCNPs are suitable for potential biological labeling.
Hexanedioic acid is used to replace the original hydrophobic ligands on the surface of up-converting rare-earth nanoparticles via an efficient ligand-exchange approach, the resulting carboxyl-functionalized UCNPs are suitable for biological applications.Figure optionsDownload as PowerPoint slide
Journal: Journal of Colloid and Interface Science - Volume 336, Issue 1, 1 August 2009, Pages 171–175