A Study on the Laser Induced Damage of Diamond-Like Carbon Film

2011 ◽  
Vol 411 ◽  
pp. 537-541
Author(s):  
Shen Jiang Wu ◽  
Jun Hong Su
Keyword(s):  
Energy Density ◽  
Electric Field ◽  
Free Electron ◽  
Carbon Film ◽  
Damage Threshold ◽  
Laser Damage ◽  
Diamond Like Carbon ◽  
Dlc Film ◽  
Laser Induced Damage ◽  
Deposition Techniques

This paper describes the structure and performances of Diamond-Like Carbon (DLC) films and introduces the film damage testing principle and methods. It also compares the different deposition techniques of DLC film laser induced damage threshold (LIDT), highlighting the influence of external electric field on the DLC film's LIDT. The photoelectron produced by the excitation of laser and the free electron in DLC film will perform a speedy movement, it indirectly decreases some part of the laser-irradiated area energy density, slows down the DLC film's graphitizing process and consequently improves its anti-laser damage ability.

scholarly journals Laser-induced diamond-like carbon film under different electric field directions

2016 ◽  
Vol 34 (1) ◽  
pp. 137-142 ◽  
Author(s):  
Wu Shenjiang ◽  
Li Dangjuan ◽  
Su Junhong
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Field Intensity ◽  
Electric Field Intensity ◽  
Laser Energy ◽  
Carbon Film ◽  
Bias Field ◽  
Diamond Like Carbon ◽  
Dlc Film ◽  
Laser Induced Damage

AbstractTi electrodes were directly deposited at different positions on diamond-like carbon (DLC) films to form horizontal and longitudinal electric fields on their surfaces. The ID/IG ratio increased with the sp3 content in the membrane when the DLC film was laser-irradiated and the electric field intensity was 0 V/cm. The bias electric field intensity increased from 0 to 1000 V/cm, and the corresponding laser-induced damage threshold (LIDT) increased. The three-dimensional damage morphology of the DLC film with two different electrode structures was observed when the electric field intensity was 220 V/cm. Two types of electrode structures were observed in the Raman spectra under an electric field intensity of 110 V/cm and laser energy densities of 0 and 1.56 J/cm2. Results showed that the horizontal bias field had a more obvious influence than the longitudinal electric field on the decrease of the sp3–sp2 hybridization, preventing the formation of sp2 clusters, thereby slowing down the graphitization process of DLC. Applying the bias field to the DLC film could slow down the DLC film graphitization process and improve the LIDT of the DLC film.

Experimental Investigation on Laser Pretreatment of Optical Films

2011 ◽  
Vol 189-193 ◽  
pp. 3713-3716
Author(s):  
Zhi Lin Xia
Keyword(s):  
Experimental Investigation ◽  
Energy Density ◽  
Pulse Width ◽  
Incidence Angle ◽  
Damage Threshold ◽  
Negative Influence ◽  
Damage Probability ◽  
Optical Films ◽  
Laser Induced Damage ◽  
K9 Glass

Optical films have been prepared on K9 glass by electronic beam evaporation. Parameters of S-polarized Nd: YAG laser used for pretreatment and damage tests are: wavelength is 355nm, pulse width is 8ns, and incidence angle is 33.75 degree. The results reflect that: the influence of laser pretreatment on laser induced damage threshold of films is uncertain. Laser pretreatment not always improve the laser induced damage threshold of films, and sometimes it will cause negative influence. As for damage probability, for a certain testing energy density, there is an energy density scope, pretreatment pulse with energy density in which can reduce the laser induced damage probability of films. The energy density of laser pretreatment pulse should be selected according to the serving conditions of films.

MULTILAYERS DIAMOND-LIKE CARBON FILM WITH GERMANIUM BUFFER LAYERS BY PULSED LASER DEPOSITION

2017 ◽  
Vol 24 (02) ◽  
pp. 1750014 ◽  
Author(s):  
Y. CHENG ◽  
Y. M. LU ◽  
Y. L. GUO ◽  
G. J. HUANG ◽  
S. Y. WANG ◽  
...  
Keyword(s):  
Critical Load ◽  
Carbon Film ◽  
High Hardness ◽  
Buffer Layers ◽  
Diamond Like Carbon ◽  
Dlc Film ◽  
Diamond Like Carbon Film ◽  
Film Hardness ◽  
Protective Films ◽  
Germanium Substrate

Multilayer diamond-like carbon film with germanium buffer layers, which was composed of several thick DLC layers and thin germanium island “layers” and named as Ge-DLC film, was prepared on the germanium substrate by ultraviolet laser. The Ge-DLC film had almost same surface roughness as the pure DLC film. Hardness of the Ge-DLC film was above 48.1[Formula: see text]GPa, which was almost the same as that of pure DLC film. Meanwhile, compared to the pure DLC film, the critical load of Ge-DLC film on the germanium substrate increased from 81.6[Formula: see text]mN to 143.8[Formula: see text]mN. Moreover, Ge-DLC film on germanium substrates had no change after fastness tests. The results showed that Ge-DLC film not only kept high hardness but also had higher critical load than that of pure DLC film. Therefore, it could be used as practical protective films.

scholarly journals Enhancement of laser-induced damage threshold in chirped mirrors by electric field reallocation

2017 ◽  
Vol 25 (22) ◽  
pp. 26537 ◽  
Author(s):  
Simas Melnikas ◽  
Tomas Tolenis ◽  
Linas Smalakys ◽  
Gintarė Batavičiūtė ◽  
Andrius Melninkaitis ◽  
...  
Keyword(s):  
Electric Field ◽  
Damage Threshold ◽  
Laser Induced Damage

Study on the Preparation of Silver Nanoparticles Coated with Diamond-Like Carbon Film and their Properties

2013 ◽  
Vol 745-746 ◽  
pp. 60-65
Author(s):  
Nan Yu Ma ◽  
Dan Zeng ◽  
Yu Jie Huang ◽  
Jun Wei Di ◽  
Mu Sen Li
Keyword(s):  
Deposition Time ◽  
Near Infrared ◽  
Resonance Effect ◽  
Carbon Film ◽  
Chemical Vapor ◽  
Diamond Like Carbon ◽  
Ag Nps ◽  
Surface Plasma Resonance ◽  
Dlc Film ◽  
Biological Compatibility

Ag nanoparticles (NPs) have prominent local surface plasma resonance effect (LSPR), and Ag NPs exhibit sharpest and strongest bands among all metals. Diamond-like carbon (DLC) film have good biological compatibility and also have high transmissibility in the visible and near-infrared region. A new LSPR interface between Ag NPs and ultra-thin DLC film was formed by Plasma Enhanced Chemical Vapor Deposition. The morphologies and properties of the Ag NPs coated with DLC film were studied with SEM and AFM. The results indicated that the thickness of DLC film increased with the deposition time. LSPR peak became sharper after depositing for 1 or 2 min. DLC film was prior to nucleate on the surface of Ag NPs, and it has high content of sp2 bonds near the interface. The sensitivity of new LSPR interface deposited for 20s was about the half of the sensitivity of bare Ag NPs and the sensitivity significantly decreased with deposition time. This result is helpful to understand the behavior of the new LSPR interface and to improve its sensitivity.

Laser damage investigation in RbTiOPO 4 crystals: a study on the anisotropy of the laser induced damage threshold

2006 ◽  
Author(s):  
Anne Hildenbrand ◽  
Frank Wagner ◽  
Jean-Yves Natoli ◽  
Mireille Commandre ◽  
Hervé Albrecht ◽  
...  
Keyword(s):  
Damage Threshold ◽  
Laser Damage ◽  
Laser Induced Damage ◽  
Damage Investigation

Deposition of a Diamond-Like-Carbon Film by Ion Plating and Investigation on its Adhesiveness

2017 ◽  
Vol 749 ◽  
pp. 70-75
Author(s):  
Xia Zhu ◽  
Kazuki Kubo ◽  
Hiromichi Toyota ◽  
Shinfuku Nomura ◽  
Yukiharu Iwamoto ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Diamond Crystal ◽  
Carbon Film ◽  
Pure Metal ◽  
Diamond Like Carbon ◽  
Interlayer Thickness ◽  
Coating Materials ◽  
Dlc Film ◽  
Ion Plating ◽  
Excellent Method

Diamond-like-carbon (DLC) films are promising as coating materials. Ion plating, an excellent method in terms of adhesiveness, step coverage, and deposition rate, can form not only pure metal films but also oxide films, nitride films, and carbonized films. In this study, which aimed to form a DLC film with good adhesiveness and a diamond crystal structure, a DLC film, with a SiC interlayer formed by ion plating with introduction of tetramethylsilane (TMS), was formed. It was experimentally revealed that as the interlayer thickness increases, the crystal structure in the DLC film becomes more diamond rich, and the adhesiveness of the DLC film and substrate is thereby improved.

Diamond-like Carbon Film Coating for Tissue Engineering

2008 ◽  
Vol 1138 ◽  
Author(s):  
Yasuharu Ohgoe ◽  
Haruki Matsuo ◽  
Kazuhiro Nonaka ◽  
Toshiyuki Yaguchi ◽  
Kazuya Kanasugi ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Surface Composition ◽  
Umbilical Vein ◽  
Carbon Film ◽  
Biological Response ◽  
Film Coating ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Diamond Like Carbon ◽  
Dlc Film

AbstractIn this study, we focus on effect of diamond-like carbon (DLC) coating on scaffold for tissue engineering. DLC film was deposited on segmented polyurethane (SPU) scaffold sheet which consists of micro SUP fibers. Structural and compositional effects of the DLC film coating were investigated on cell growth as an investigation of biological response. The surface composition, morphology, structures, and wettability of the DLC film coating was estimated by using X-ray photoelectron spectrometer (XPS), Scanning Electron Microscope (SEM), Ar-laser Raman spectrophotometer (Raman), and contact angle measurement. And then, human umbilical vein endothelial (HUV-EC-C) cells were grown on the DLC coated scaffold sheet. The results presented here suggest that DLC film coating is promising approach to improve biological for tissue engineering.

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