Amorphous Se: a new platform for synthesizing superparamagnetic colloids with controllable surfaces.
J Am Chem Soc
; 127(4): 1098-9, 2005 Feb 02.
Article
em En
| MEDLINE
| ID: mdl-15669838
ABSTRACT
We have successfully incorporated iron oxide nanoparticles into monodispersed amorphous selenium (a-Se) colloids by regulating the reaction temperature during the synthesis of a-Se. The surfaces of these a-Se colloids could be coated with conformal and smooth shells made of Pt and SiO2. The Se cores could then be removed by etching with hydrazine. The spherical morphology and superparamagnetism were maintained in all these synthetic steps. The presence of Pt and SiO2 on the outer surfaces of these colloidal particles allows one to control their surface functionalities through the formation of alkanethiolate and siloxane monolayers, respectively.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Selênio
/
Compostos Férricos
/
Coloides
/
Nanoestruturas
/
Magnetismo
Idioma:
En
Ano de publicação:
2005
Tipo de documento:
Article