INVESTIGADORES
PLANES Gabriel Angel
artículos
Título:
Synthesis of ultra-small cysteine-capped gold nanoparticles by pH switching of the Au(I)?cysteine polymer
Autor/es:
PAULA S. CAPPELLARI; DAVID BUCETA; GUSTAVO M. MORALES; CESAR A. BARBERO; MORENO, M. SERGIO; LISANDRO GIOVANETTI; JOSE RAMALLO LÓPEZ; FÉLIX REQUEJO ; ALDO F. CRAIEVICH; GABRIEL A. PLANES
Revista:
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
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.