INVESTIGADORES
MORENO Mario Sergio Jesus
artículos
Título:
Synthesis of ultra-small cysteine-capped gold nanoparticles by pH switching of the Au(I)?cysteine polymer
Autor/es:
P.S. CAPPELLARI; D. BUCETA; G.M. MORALES; C.A. BARBERO; M.S. MORENO; L.J. GIOVANETTI; J.M. RAMALLO-LÓPEZ; F.G. REQUEJO; A.F. CRAIEVICH; G.A. PLANES
Revista:
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
Lugar: Amsterdam; Año: 2015 vol. 441 p. 17 - 24
ISSN:
0021-9797
Resumen:
We report a synthetic approach for the production of ultra-small (0.6 nm) gold nanoparticles soluble in water with a precise control of the nanoparticle size. Our synthetic approach utilizes a pH-depending Au?cysteine polymer as a quencher for the AuNPs grown. The method extends the synthetic capabilities of nanoparticles with sizes down to 1 nm. In addition to the strict pH control, the existence of free ?SH groups present in the mixture of reaction has been observed as a key requirement for the synthesis of small nanoparticles in mild conditions. UV?Vis, SAXS, XANES, EXAFS and HR-TEM, has been used to determinate the particle size, characterization of the gold precursor and gold?cysteine interaction.