Silver-gold alloy nanoclusters as a fluorescence-enhanced probe for aluminum ion sensing.
Anal Chem
; 85(20): 9839-44, 2013 Oct 15.
Article
em En
| MEDLINE
| ID: mdl-24016136
In this paper, the development of a simple method is described for preparing highly red fluorescent mercaptosuccinic acid stabilized AgAu alloy nanoclusters (MSA-AgAu NCs) through the core etching of Ag nanoparticles (NPs) and a galvanic exchange reaction using nonorganic solvent and no multistep centrifuge washing. The as-prepared MSA-AgAu NCs were characterized using spectroscopic and microscopic techniques. After covalently attaching methoxy-poly(ethylene glycol)-NH2 (m-PEG-NH2), PEGylated MSA-AgAu NCs were still stable even in 1 M NaCl. Probably based on the deposition of Al(3+)-enhanced fluorescence, the PEGylated MSA-AgAu NCs offered highly selective and sensitive sensing of Al(3+) in aqueous solution with a detection limit of 0.8 µM.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article