Título

Laser ablated carbon nanodots for light emission

Autor

MIGUEL ANGEL CAMACHO LOPEZ

Delfino Reyes Contreras

MIGUEL MAYORGA ROJAS

Duncan Weathers

GREG SALAMO

Zhiming Wang

Biswarup Neogi

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Materias

laser ablation - ([1931-7573]) carbon nanodots - ([1931-7573]) photoluminescence - ([1931-7573]) BIOLOGÍA Y QUÍMICA - (CTI)

Resumen o descripción

The synthesis of fluorescent carbon dots-like nanostructures (CNDs) obtained through the laser ablation of a carbon solid target in liquid environment is reported. The ablation process was induced in acetone with laser pulses of 1064, 532, and 355 nm under different irradiation times. Close-spherical amorphous CNDs with sizes between 5 and 20 nm, whose abundance strongly depends on the ablation parameters were investigated using electron microscopy and was confirmed using absorption and emission spectroscopies. The π- π* electronic transition at 3. 76 eV dominates the absorption for all the CNDs species synthesized under different irradiation conditions. The light emission is most efficient due to excitation at 3.54 eV with the photoluminescence intensity centered at 3. 23 eV. The light emission from the CNDs is most efficient due to ablation at 355 nm. The emission wavelength of the CNDs can be tuned from the near-UV to the green wavelength region by controlling the ablation time and modifying the ablation and excitation laser wavelength.

Editor

Nanoscale Research Letters

Fecha de publicación

22 de septiembre de 2016

Tipo de publicación

Artículo

Recurso de información

http://hdl.handle.net/20.500.11799/79974

Fuente

1931-7573

Idioma

Inglés

Relación

11:424;

DOI 10.1186/s11671-016-1638-8;

Audiencia

Estudiantes

Investigadores

Repositorio Orígen

REPOSITORIO INSTITUCIONAL DE LA UAEM

Descargas

258