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Production of nanoparticles from natural hydroxylapatite by laser ablation.

Boutinguiza M, Comesaña R, Lusquiños F, Riveiro A, Pou J - Nanoscale Res Lett (2011)

Bottom Line: Laser ablation of solids in liquids technique has been used to obtain colloidal nanoparticles from biological hydroxylapatite using pulsed as well as a continuous wave (CW) laser.High resolution TEM showed that particles obtained by the use of pulsed laser were crystalline, while those obtained by the use of CW laser were amorphous.The shape and size of particles are consistent with the explosive ejection as formation mechanism.

View Article: PubMed Central - HTML - PubMed

Affiliation: Dpto, Física Aplicada, Universidad de Vigo, Lagoas-Marcosende, 9, Vigo 36310, Spain. mohamed@uvigo.es.

ABSTRACT
Laser ablation of solids in liquids technique has been used to obtain colloidal nanoparticles from biological hydroxylapatite using pulsed as well as a continuous wave (CW) laser. Transmission electron microscopy (TEM) measurements revealed the formation of spherical particles with size distribution ranging from few nanometers to hundred nanometers and irregular submicronic particles. High resolution TEM showed that particles obtained by the use of pulsed laser were crystalline, while those obtained by the use of CW laser were amorphous. The shape and size of particles are consistent with the explosive ejection as formation mechanism.

No MeSH data available.


HRTEM micrograph showing crystalline nanoparticles obtained from fish bones by laser ablation in water using pulsed laser and their corresponding fast Fourier transform (inset). Laser irradiance: 8 × 5 × 106 W/cm2.
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Figure 3: HRTEM micrograph showing crystalline nanoparticles obtained from fish bones by laser ablation in water using pulsed laser and their corresponding fast Fourier transform (inset). Laser irradiance: 8 × 5 × 106 W/cm2.

Mentions: The use of pulsed laser with 3 ms pulse width, 1.8 J, and 10 Hz of frequency (laser irradiance: 8 × 5 × 106 W/cm2) lead mainly to the formation of particles with rounded shape and nanometric size as can be seen from Figure 3. The HRTEM micrograph demonstrates that these particles are crystalline, showing the lattice fringes used to quantify the inter-planar spacing by means of the fast Fourier transform. The results of crystalline phases identified by inter-planar distances revealed that the obtained nanoparticles are mainly composed of HA and β-TCP, as listed in Table 1. The microanalysis performed on this kind of particles showed also the presence of trace elements, such as Mg and Si.


Production of nanoparticles from natural hydroxylapatite by laser ablation.

Boutinguiza M, Comesaña R, Lusquiños F, Riveiro A, Pou J - Nanoscale Res Lett (2011)

HRTEM micrograph showing crystalline nanoparticles obtained from fish bones by laser ablation in water using pulsed laser and their corresponding fast Fourier transform (inset). Laser irradiance: 8 × 5 × 106 W/cm2.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211317&req=5

Figure 3: HRTEM micrograph showing crystalline nanoparticles obtained from fish bones by laser ablation in water using pulsed laser and their corresponding fast Fourier transform (inset). Laser irradiance: 8 × 5 × 106 W/cm2.
Mentions: The use of pulsed laser with 3 ms pulse width, 1.8 J, and 10 Hz of frequency (laser irradiance: 8 × 5 × 106 W/cm2) lead mainly to the formation of particles with rounded shape and nanometric size as can be seen from Figure 3. The HRTEM micrograph demonstrates that these particles are crystalline, showing the lattice fringes used to quantify the inter-planar spacing by means of the fast Fourier transform. The results of crystalline phases identified by inter-planar distances revealed that the obtained nanoparticles are mainly composed of HA and β-TCP, as listed in Table 1. The microanalysis performed on this kind of particles showed also the presence of trace elements, such as Mg and Si.

Bottom Line: Laser ablation of solids in liquids technique has been used to obtain colloidal nanoparticles from biological hydroxylapatite using pulsed as well as a continuous wave (CW) laser.High resolution TEM showed that particles obtained by the use of pulsed laser were crystalline, while those obtained by the use of CW laser were amorphous.The shape and size of particles are consistent with the explosive ejection as formation mechanism.

View Article: PubMed Central - HTML - PubMed

Affiliation: Dpto, Física Aplicada, Universidad de Vigo, Lagoas-Marcosende, 9, Vigo 36310, Spain. mohamed@uvigo.es.

ABSTRACT
Laser ablation of solids in liquids technique has been used to obtain colloidal nanoparticles from biological hydroxylapatite using pulsed as well as a continuous wave (CW) laser. Transmission electron microscopy (TEM) measurements revealed the formation of spherical particles with size distribution ranging from few nanometers to hundred nanometers and irregular submicronic particles. High resolution TEM showed that particles obtained by the use of pulsed laser were crystalline, while those obtained by the use of CW laser were amorphous. The shape and size of particles are consistent with the explosive ejection as formation mechanism.

No MeSH data available.