Surface Processing: An Elegant Way to Enhance the Femtosecond Laser Ablation Rate and Ablation Efficiency on Human Teeth

2019 ◽  
Vol 51 (9) ◽  
pp. 797-807 ◽  
Author(s):  
Sarathkumar Loganathan ◽  
Soundarapandian Santhanakrishnan ◽  
Ravi Bathe ◽  
Muthukumaraswamy Arunachalam
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Ablation Rate ◽  
Surface Processing ◽  
Human Teeth ◽  
Ablation Efficiency

FTIR and Raman as a noninvasive probe for predicting the femtosecond laser ablation profile on heterogeneous human teeth

2021 ◽  
Vol 115 ◽  
pp. 104256
Author(s):  
Sarathkumar Loganathan ◽  
Soundarapandian Santhanakrishnan ◽  
Ravi Bathe ◽  
Muthukumaraswamy Arunachalam
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Human Teeth ◽  
Ablation Profile

scholarly journals Femtosecond laser ablation of brass: A study of surface morphology and ablation rate

2012 ◽  
Vol 30 (3) ◽  
pp. 473-479 ◽  
Author(s):  
Mohamed E. Shaheen ◽  
Brian J. Fryer
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Surface Morphology ◽  
Fine Particles ◽  
Femtosecond Laser Ablation ◽  
Laser Pulses ◽  
Ambient Air ◽  
Ablation Rate ◽  
Femtosecond Laser Pulses ◽  
Nanosecond Laser

AbstractThe interaction of near infrared femtosecond laser pulses with a Cu based alloy (brass) in ambient air at atmospheric pressure and under different laser conditions was investigated. The effects of laser fluence and number of pulses on surface morphology and ablation rate were studied using scanning electron microscopy (SEM) and optical microscopy. Ablation rates were found to rapidly increase from 83 to 604 nm/pulse in the fluence range 1.14–12.21 J/cm2. At fluence >12.21 J/cm2, ablation rates increased slowly to a maximum (607 nm/pulse at 19.14 J/cm2), and then decreased at fluence higher than 20.47 J/cm2 to 564 nm/pulse at 24.89 J/cm2. Large amounts of ablated material in a form of agglomerated fine particles were observed around the ablation craters as the number of laser pulses and fluence increased. The study of surface morphology shows reduced thermal effects with femtosecond laser ablation in comparison to nanosecond laser ablation at low fluence.

Femtosecond laser ablation of Zn in air and ethanol: effect of fluence on the surface morphology, ablated area, ablation rate and hardness

2021 ◽  
Vol 127 (4) ◽  
Author(s):  
Shazia Bashir ◽  
Muhammad Shahid Rafique ◽  
Ali Asghar Ajami ◽  
Chandra Sekher Nathala ◽  
Wolfgang Husinsky ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Surface Morphology ◽  
Femtosecond Laser Ablation ◽  
Ablation Rate ◽  
Ethanol Effect

scholarly journals Near-Infrared Femtosecond Laser Ablation of Au-Coated Ni: Effect of Organic Fluids and Water on Crater Morphology, Ablation Efficiency and Hydrodynamic Properties of NiAu Nanoparticles

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5544
Author(s):  
Niusha Lasemi ◽  
Günther Rupprechter ◽  
Gerhard Liedl ◽  
Dominik Eder
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Near Infrared ◽  
Defect Formation ◽  
Fatigue Cracks ◽  
Residual Effect ◽  
Femtosecond Laser Ablation ◽  
Laser Target ◽  
Ablation Efficiency ◽  
Crater Morphology

Scanning electron microscopy (SEM) and profilometry of the crater morphology and ablation efficiency upon femtosecond laser ablation of Au-coated Ni targets in various fluids revealed a pronounced dependence on the ablation medium. For ethanol, a sufficient ablation efficiency was obtained, whereas for 2-butanol a higher efficiency indicated stronger laser–target interaction. Hierarchical features in the crater periphery pointed to asymmetrical energy deposition or a residual effect of the Coulomb-explosion-initiating ablation. Significant beam deviation in 2-butanol caused maximum multiple scattering at the crater bottom. The highest values of microstrain and increased grain size, obtained from Williamson–Hall plots, indicated the superposition of mechanical stress, defect formation and propagation of fatigue cracks in the crater circumference. For n-hexane, deposition of frozen droplets in the outer crater region suggested a femtosecond-laser-induced phase explosion. A maximum ablation depth occurred in water, likely due to its high cooling efficiency. Grazing incidence micro X-ray diffraction (GIXRD) of the used target showed residual carbon and partial surface oxidation. The produced nanoparticle colloids were examined by multiangle dynamic light scattering (DLS), employing larger scattering angles for higher sensitivity toward smaller nanoparticles. The smallest nanoparticles were obtained in 2-butanol and ethanol. In n-hexane, floating carbon flakes originated from femtosecond-laser-induced solvent decomposition.

Prediction of femtosecond laser ablation profile on human teeth

2018 ◽  
Vol 34 (4) ◽  
pp. 693-701 ◽  
Author(s):  
Sarathkumar Loganathan ◽  
Soundarapandian Santhanakrishnan ◽  
Ravi Bathe ◽  
Muthukumaraswamy Arunachalam
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Human Teeth ◽  
Ablation Profile

scholarly journals Nonlinear enhancement of femtosecond laser ablation efficiency by hybridization with nanosecond laser

2006 ◽  
Vol 14 (20) ◽  
pp. 9544 ◽  
Author(s):  
J. S. Yahng ◽  
B. H. Chon ◽  
C. H. Kim ◽  
S. C. Jeoung ◽  
H. R. Kim
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Nanosecond Laser ◽  
Ablation Efficiency

Femtosecond laser ablation of dentin and enamel: relationship between laser fluence and ablation efficiency

2015 ◽  
Vol 20 (2) ◽  
pp. 028004 ◽  
Author(s):  
Hu Chen ◽  
Jing Liu ◽  
Hong Li ◽  
Wenqi Ge ◽  
Yuchun Sun ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Laser Fluence ◽  
Femtosecond Laser Ablation ◽  
Ablation Efficiency

scholarly journals Prediction of femtosecond laser ablation parameter on Human teeth using chemical compositional analysis

2019 ◽  
Vol 34 ◽  
pp. 379-384
Author(s):  
Sarathkumar Loganathan ◽  
Soundarapandian Santhanakrishnan ◽  
Ravi Bathe ◽  
Muthukumaraswamy Arunachalam
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Compositional Analysis ◽  
Femtosecond Laser Ablation ◽  
Human Teeth
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