# name
Preparation of silver nanoparticles by laser ablation in water

# metadata.dc.description[].value
Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Any: 2014, Tutor: Juan Marcos Fernandez Pradas

# metadata.dc.description.abstract[].value
Solutions of silver nanoparticles are obtained by laser ablation in order to analyze the effectivity of this
method. The laser used was a Nd:YAG with 1064 nm of wavelength. Characterization of these particles was done
using a tranmission electron microscope and a spectrophotometer of double beam, in order to measure both the size
and the absorption spectrum of these nanoparticles. The average diameter of the produced nanoparticles increases,
from 9 to 22 nm, as the laser pulse energy increases from 9 to 13 mJ. These particles obtained in solution present a
strong absorption due to plasmon resonance around 400 nm. It is observed that the peak absorbance of each sample
is directly related with the concentration and the size of silver nanoparticles. The position and the maximum value of
the peak absorbance variates when ablation time, energy density or laser energy are changed. Ablation efficiency is
reduced as time progresses during the process due to the absorption and dispersion of laser light by the nanoparticle solution.

# metadata.dc.title[].value
Preparation of silver nanoparticles by laser ablation in water