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A comparison of the characteristics of nanosecond, picosecond and femtosecond lasers generated Ag, TiO2 and Au nanoparticles in deionised water

A. Hamad, L. Li, Z. Liu

Applied Physics A. 2016;120(4):1247-1260.

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Abstract

Although there have been large quantities of published work in laser generation of nanoparticles, it is still unclear on the comparative role of laser wavelengths and pulse widths in controlling the nanoparticle sizes, morphology and production rate. In this investigation, Ag, Au and TiO2 nanoparticles were synthesised by nanosecond (lambda = 532 nm, tau = 5 ns), picosecond (lambda = 1064 nm, tau = 10 ps) and femtosecond (lambda = 800 nm, tau = <100 fs) pulse lasers in deionised water. They are compared, in terms of their optical absorption spectra, morphology, size distribution and production rates, characterised by UV-Vis spectroscopy and transmission electron microscopy. The ablation rates of both Ag and Ti samples were shown as a function of laser pulse energy and water level above the samples. The average size of nanoparticles (10-50 nm) was found to be smaller for the shorter wavelength (532 nm) nanosecond pulsed laser compared with those of picosecond and femtosecond lasers, demonstrating a more dominating role of laser wavelength than pulse width in particle size control. The ps laser generated more spherical Ag nanoparticles than those with the ns and fs lasers. Under the same laser processing conditions, Au nanoparticles are smaller than Ag and TiO2, with the latter, the largest. The nanoparticle production rate is relatively independent upon laser types, wavelengths and pulse lengths, but largely determined by the laser fluence and energy deposited.

Keyword(s)

SILVER NANOPARTICLES ABLATION LIQUID SIZE METALS WAVELENGTH SOLIDS TARGET PULSES BRASS

Bibliographic metadata

Type of resource:
Content type:
Publication status:
Published
Publication type:
Publication form:
Published date:
Language:
eng
Journal title:
ISSN:
Publisher:
Volume:
120
Issue:
4
Start page:
1247
End page:
1260
Total:
13
Pagination:
1247-1260
Digital Object Identifier:
10.1007/s00339-015-9326-6
Attached files embargo period:
Immediate release
Attached files release date:
14th December, 2015
Access state:
Active

Institutional metadata

University researcher(s):

Record metadata

Manchester eScholar ID:
uk-ac-man-scw:288184
Created by:
Li, Lin
Created:
14th December, 2015, 16:17:12
Last modified by:
Li, Lin
Last modified:
14th December, 2015, 16:17:12

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