scholarly journals Formation Technique of Electrically Conductive Pattern on Molded Polymeric Material by Carbon Dioxide Laser Irradiation

Seikei-Kakou ◽  
2012 ◽  
Vol 24 (6) ◽  
pp. 341-343
Author(s):  
Takushi Saito ◽  
Jyonghyeob Park ◽  
Tatsuya Kawaguchi ◽  
Isao Satoh
Keyword(s):  
Carbon Dioxide ◽  
Laser Irradiation ◽  
Polymeric Material ◽  
Carbon Dioxide Laser ◽  
Electrically Conductive ◽  
Conductive Pattern ◽  
Formation Technique

Formation of Electro-Conductive Part on Polymeric Material Surface by CO2 Laser Irradiation

2011 ◽  
Author(s):  
Takushi Saito ◽  
Tatsuya Kawaguchi ◽  
Isao Satoh
Keyword(s):  
Electrical Conductivity ◽  
Laser Irradiation ◽  
Polymeric Material ◽  
Carbon Dioxide Laser ◽  
Laser Intensity ◽  
Material Surface ◽  
Small Disk ◽  
Electrically Conductive ◽  
Higher Temperature ◽  
Property Changes

In this study, a method to directly form an electrically conductive layer on the surface of polymeric material by using infrared laser irradiation was investigated. Polyacrylonitrile, which was shaped into a small disk 20 mm in diameter and 5 mm thick, was used as a test specimen. The conditions for pyrolysis were obtained by referencing the conditions for commercial carbon fiber. First, the specimen was processed in air at a relatively low temperature (around 250°C) for the stabilization treatment (i.e., fireproofing), then its surface was heated at a higher temperature (above 1000°C) for the carbonization treatment (i.e., graphitizing). Both an infrared furnace and a carbon dioxide laser were used as heating devices to find optimal conditions. Property changes in the material due to the thermal treatment were measured using Fourier transform infrared spectroscopy, and the electrical conductivity of the carbonized surface was measured using a four-probe method. The results showed that an electrical conductivity of 11.4 S/cm (siemens per centimeter) was achieved with a laser intensity of 8.6 W/cm2 for 5 min for the stabilization, and a laser intensity of 34 W/cm2 for 10 s for the carbonization.

Caries Prevention Effects of Silver Diamine Fluoride with 10,600 nm Carbon Dioxide Laser Irradiation on Dentin

2020 ◽  
Vol 38 (5) ◽  
pp. 295-300 ◽  
Author(s):  
Kenneth Luk ◽  
Irene Shuping Zhao ◽  
Ollie Yiru Yu ◽  
May Lei Mei ◽  
Norbert Gutknecht ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Laser Irradiation ◽  
Carbon Dioxide Laser ◽  
Caries Prevention ◽  
Silver Diamine Fluoride

Carbon dioxide laser irradiation of bacterial targets in vitro

1987 ◽  
Vol 9 (3) ◽  
pp. 265-273 ◽  
Author(s):  
P.O. Byrne ◽  
P.R. Sisson ◽  
P.D. Oliver ◽  
H.R. Ingham
Keyword(s):  
Carbon Dioxide ◽  
Laser Irradiation ◽  
Carbon Dioxide Laser

Effect of carbon dioxide laser irradiation on enamel surface microhardness around orthodontic brackets

2014 ◽  
Vol 146 (2) ◽  
pp. 161-165 ◽  
Author(s):  
Amirfarhang Miresmaeili ◽  
Nasrin Farhadian ◽  
Loghman Rezaei-soufi ◽  
Mehdi Saharkhizan ◽  
Meysam Veisi
Keyword(s):  
Carbon Dioxide ◽  
Laser Irradiation ◽  
Carbon Dioxide Laser ◽  
Enamel Surface ◽  
Orthodontic Brackets ◽  
Surface Microhardness

Vitreous morphology after carbon dioxide laser irradiation

1984 ◽  
Vol 221 (6) ◽  
pp. 276-281 ◽  
Author(s):  
H. Yoshimoto ◽  
A. Kampik ◽  
R. Birngruber ◽  
V. -P. Gabel
Keyword(s):  
Carbon Dioxide ◽  
Laser Irradiation ◽  
Carbon Dioxide Laser

Influence of carbon dioxide laser irradiation on the morphology and function of guinea pig cochlea

2005 ◽  
Vol 119 (9) ◽  
pp. 684-692 ◽  
Author(s):  
DongDong Ren ◽  
JingWU Sun ◽  
GuangLun Wan ◽  
Feng Yang ◽  
Fang Shen
Keyword(s):  
Nitric Oxide ◽  
Carbon Dioxide ◽  
Guinea Pig ◽  
Inner Ear ◽  
Laser Irradiation ◽  
Carbon Dioxide Laser ◽  
Organ Of Corti ◽  
Spiral Ligament ◽  
Laser Application ◽  
Brainstem Response

Both experimental and clinical studies have demonstrated that carbon dioxide laser is suitable for stapedotomy. The aim of this study was to investigate morphological, electrophysiological and functional changes in the inner ear after irradiation with CO2 laser set with different energy parameters.A cochleostomy in the basal cochlear turn of guinea pig cochleae was performed with CO2 laser of 1, 2 and 3 w, respectively. The cochleae were removed three weeks after laser irradiation. The auditory evoked brainstem response (ABR) was measured before and after laser application and immediately before removal of the cochlea. Immunohistochemical methods were used to examine inducible nitric oxide synthase (iNOS/NOSII) and heat-shock protein 70(Hsp70) concentrations in the cochlea after laser application. The organ of Corti was studied by scanning electron microscopy.Worse hearing loss was observed in animals receiving higher-power CO2 laser. These findings correlated with more intense injury of the cochlear ultrastructure and with positiveexpression of iNOS and Hsp70 in spiral ganglion cells, nerve fibres, supporting cells of the organ of Corti and cells of the spiral ligament.The CO2 laser as a noncontact procedure is shown to be effective and safe if the total amount of energy is kept within the limits applied in this study. Nitric oxide and stressproteins play important roles in the traumatic mechanism of the inner ear, which are related tohearing loss and injury of the ultrastructure of the inner ear.

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