Synthesis of ultra-small cysteine-capped gold nanoparticles by pH switching of the Au(I)-cysteine polymer
作者： Paula S. Cappellari , David Buceta , Gustavo M. Morales , Cesar A. Barbero , M. Sergio Moreno
DOI: 10.1016/J.JCIS.2014.11.016
关键词:
摘要: Abstract We report a synthetic approach for the production of ultra-small (0.6 nm) gold nanoparticles soluble in water with precise control nanoparticle size. Our utilizes pH-depending Au–cysteine polymer as quencher AuNPs grown. The method extends capabilities sizes down to 1 nm. In addition strict pH control, existence free –SH groups present mixture reaction has been observed key requirement synthesis small mild conditions. UV–Vis, SAXS, XANES, EXAFS and HR-TEM, used determinate particle size, characterization precursor gold–cysteine interaction.
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