English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/108032
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título

Fabrication of platinum nanoparticles by laser ablation in water

Autor Sanz, M. ; Oujja, M.; Castillejo, Marta ; Cueto, Maite ; Gámez, F.; Martínez-Haya, B.
Fecha de publicación may-2011
EditorElsevier
Citación The European Materials Research Society (EMRS) 2011 Spring Meeting, 9-13 de mayo de 2011. Niza, Francia
ResumenNoble metal nanoparticles have attracted much interest due to the large number of applications among them their use as substrates for laser desorption ionization (LDI) mass spectrometry. Laser ablation constitutes an advantageous technique to synthesize metal nanoparticles by irradiating a metallic target in aqueous solution as their size distribution and concentration can be controlled by adequate choice of laser wavelength and pulse duration. In this work, aqueous suspensions of platinum colloidal nanoparticles of varying size and polydispersity were produced in solution by ablation with a Q-switched Nd:YAG laser (pulse 5 ns). Several laser wavelengths, (1064, 532 and 266 nm) and stabilizing agents, such as PEG, PVA, PVP and citrate, were employed and their influence on the obtained nanoparticles was determined. The size, morphology, structure and optical properties of the colloids were investigated by transmission electron microscopy and UV-VIS absorption spectroscopy. IR ablation leads to nanoparticles with mean diameter of 10 nm and a broad size distribution (width 5 nm). The nanoparticle size is significantly reduced upon UV ablation (2 nm mean diameter, 0.3 nm distribution width) which also yields crystalline nanoparticles. Moreover at 266 nm the use of PVA yielded crystalline Pt nanorods of  10 x 70 nm2. The obtained colloids serve to fabricate nanostructured films capable of assisting LDI of low molecular weight (m/z < 1500) polymeric and biomolecular analytes.
URI http://hdl.handle.net/10261/108032
Aparece en las colecciones: (IQFR) Comunicaciones congresos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Póster EMRS.pdf1,65 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.