Preparation and electrical properties of cobalt-platinum nanoparticle monolayers deposited by the Langmuir-Blodgett technique.
ACS Nano
; 2(6): 1123-30, 2008 Jun.
Article
em En
| MEDLINE
| ID: mdl-19206329
ABSTRACT
The Langmuir-Blodgett technique was utilized and optimized to produce closed monolayers of cobalt-platinum nanoparticles over vast areas. It is shown that sample preparation, "dipping angle", and subphase type have a strong impact on the quality of the produced films. The amount of ligands on the nanoparticle's surface must be minimized, the dipping angle must be around 105 degrees , while the glycol subphase is necessary to obtain nanoparticle monolayers. The achieved films were characterized by scanning electron microscopy (SEM) and grazing incidence X-ray scattering (GISAXS). The electrical properties of the deposited films were studied by direct current (DC) measurements, showing a discrepancy to the variable range hopping transport from the granular metal model and favoring the simple thermal activated charge transport. SEM, GISAXS, as well as DC measurements confirm a narrow size distribution and high ordering of the deposited films.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Platina
/
Cobalto
/
Cristalização
/
Nanotecnologia
/
Nanoestruturas
/
Membranas Artificiais
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
ACS Nano
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Alemanha