Synthesis of cobalt aluminate nanopigments by a non-aqueous sol-gel route
authors Karmaoui, M; Silva, NJO; Amaral, VS; Ibarra, A; Millan, A; Palacio, F
nationality International
journal NANOSCALE
keywords SUPERCRITICAL WATER; MEDIATED SYNTHESIS; PIGMENT PARTICLES; COAL2O4; SPINELS; NANOCRYSTALS; ORDER
abstract Here we report the chemical synthesis of cobalt aluminum oxide (CoAl2O4) nanoparticles by a non-aqueous sol-gel route. The one-pot procedure is carried out at mild temperatures (in the 150 to 300 degrees C range), and consists of the reaction between cobalt acetate and aluminium isopropoxide in benzyl alcohol. The resulting CoAl2O4 nanoparticles show an unusually low average size, between 2.5 and 6.2 nm, which can be controlled by the synthesis temperature. The colorimetric properties of the nanoparticles are also determined by the synthesis temperature and the characteristic blue color of CoAl2O4 pigments is achieved in samples prepared at T >= 200 degrees C. The nanoparticles are antiferromagnetically ordered below similar to 27 K with an uncompensated configuration. The uncompensated moment shows the typical features of strongly interacting superparamagnetic nanoparticles and spin-glass systems.
publisher ROYAL SOC CHEMISTRY
issn 2040-3364
year published 2013
volume 5
issue 10
beginning page 4277
ending page 4283
digital object identifier (doi) 10.1039/c3nr34229h
web of science category Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
subject category Chemistry; Science & Technology - Other Topics; Materials Science; Physics
unique article identifier WOS:000318362400035
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 7.233
5 year journal impact factor 7.713
category normalized journal impact factor percentile 86.592
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg