In the early years, DLC films was deposited at high voltage applied by electrochemical method. In this study, DLC film was deposited alternatively at low voltage applied using electrodeposition. The ITO glass substrate was used as the cathode, and graphite sheet was the anode. The electrolyte is a mixture of acetic acid with DI water. The applied voltage was mere 2.1 volt during the electrochemical process. For investigating the structure of deposited films, the deposited DLC layers were characterized by Fourier transform infrared (FTIR), Scanning electron microscope (SEM) and Raman spectrometer. The SEM results show that the DLC films have a rough surface and their roughness increased with longer in deposition time as well as raise applied voltage. The Raman spectra shows distinct broad characteristic peaks at ~ 1336 cm-1 (D-peak) and ~ 1601 cm-1 (G-peak), which indicate the disordered graphite-like structure and the graphite structure, respectively. While the bond angles occur to bend or the increase the content of sp3 bonds in DLC film, both the G-peak and the D-peak shift to the lower wave numbers. Peaks at ~ 2956 and ~ 2917 cm-1 found in FTIR measurement were used to recognize the existence of sp3 and sp2 combined carbon atoms in the films. Based on above results, it could conclude that the DLC film could be prepared by electrodeposition under low applied voltage.

The Diamond-like Carbon (DLC) films have numerous extraordinary advantages, such as high hardness, low friction factor, strong chemical stability, and high insulation properties for satisfying significant application in the industrial domain. In this study, DLC films are deposited by electrodeposition, which is different from the conventional technology of PVD and CVD. The methodology provides several advantages such as low voltage supply, low temperature electrodeposition, simple experimental steps and easy to operate, resulting in low costs. The experiment used ITO glass substrate covered with SnO2 as cathode, a thin graphite plate as anode, the voltage supply between the two poles is 2.1V ~ 50V, and the main components of electrolyte is the solution of acetic acid with deionized (DI) water. The property of Diamond-like Carbon films have been investigated to be associated with a variety of bias voltage, the concentration of acetic acid (electrolyte) during the process. As a result, the deposition rate and hardness of Diamond-like Carbon films increase with the bias voltage. However, the surface roughness tends to decrease, and the same outcomes manifested when the concentration of electrolyte increased. For the analysis of Raman Spectrum, the D peak and G peak were at 1350cm-1 and 1580cm-1 individually, which demonstrated the existence of Diamond-like Carbon films. Finally, of analyzing the SEM and AFM photograph, the surface morphology of Diamond-like Carbon films are used to correlate the deposited parameters for obtaining the best quality of DLC films.

Discotic liquid crystals(DLCs) in this research absorb the light in visible region of spectrum, this characteristic is not found in rod-like liquid crystals. A majority of discotic liquid crystals form columnar mesophases probably due to intense £k-£k interactions of polyaromatic cores. £k-£k interactions are caused by intermolecular overlapping of p-orbitals in £k-conjugated systems, so they become stronger as the number of £k-electrons increases. Three new hexagonal columnar disctic liquid crystals 9-{11-[2,3,6,7-tetrakis(hexyloxy)dibenzo[a,c]phenazinylcarboxyalkyl]} have been successfully synthesized by covalently attaching carbazole moiety to a tetrakis (hexyloxy)dibenzo[a,c]phenazinyl core with an ester group containing different lengths of alkyl spacer having 3,6,and 11 carbon atoms. In order to set up a basic data base, we measure and analyze the discotic liquid crystals via various instruments.In addition, we also utilize both simulation systems of MMM and QMM to predict several molecular dynamics and properties such as: vibration, rotation, motion and heat of formation and so on.So we can see more depth inside how the concentration effects on the geometry structure arrangement of the discotic liquid crystals.

Diamond-Like Carbon ¡]DLC¡^films were successfully deposited on the ITO substrate by electrodeposition technique. This method has several advantages in terms of low cost, rapid growth rates and simple setup. Electrodeposition of DLC thin film was carried out at low DC potential by using a mixture of acetic acid and DI water as electrolyte. The Raman spectra showed two peaks located at 1350cm-1 and 1580cm-1, which were the characterized peaks for DLC films deposited on ITO substrates. By varying the experimental parameters such as the deposited DC potential, distance of electrodes, and the concentrations of solution, the growth mechanism of deposition process was investigated, and the best quality of DLC films was also achieved. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to make insight into accurately the surface morphology of DLC films related to deposited parameters In addition, according to the experimental results, it indicates that the quality of the DLC film was improved as deposited at higher DC voltage. Finally, to demonstrate the effect of annealing on the interfacial characteristics the C-V and G-V curves of MIS structures are the further works.

Diamond-like carbon (DLC) film exhibits an extreme hardness, low friction coefficient, chemical stability, heat conductivity, high resistance, and high optical transparency. There properties lead to remarkable applications such as protective and anti-reflection coating, wear resistant overcoat and biocompatible coatings. In this study, Diamond-like carbon films were deposited by electrodepsoition technique, and the deposition parameters include DC potential, deposited temperature, the concentration of electrolyte were varied to study the characteristics, microstructure and the composition of DLC film. In addition, the optimizing deposition was revealed and discussed in detail. The Diamond-like carbon film were deposited by electrodepsoition technique onto the ITO glass substrates, and the deposition conditions were preset in the range as the applied voltage from 50V and 250V, low deposition temperature within 35¢Jto 50¢J and a mixture of acetonitrile and deionized water with the concentrations of acetonitrile between 0.2% and 3.2%. Scanning electron microscopy can make an insight into the surface morphology also to reveal the uniformity of the DLC films. For the I-t curves of DLC film growth, it can be used to study of the growth mechanism by correlation the surface morphology observed by Scanning electron microscopy (SEM). The transmission, refraction index and optical band gap of DLC film was measured by the N &K analyzer. Finally, the hydrogen content, composition and microstructure of DLC films were characterized by the FTIR and XPS analyze In experimental work, the properties of DLC film obtained depends on a verity of growth parameters such as applied voltage, the concentration of electrolyte and deposition temperature. With the increase of the applied voltage, it increases with the growth rate of deposited films. That was also observed in the increase of concentration and temperature. As increase the film¡¦s thickness, the film surface becomes to the light yellow brown color, and which also causes to increase the refractive index, decrease the transmission rate, reduce the optical band gap, and decrease the amount of C-H bond and the C-N bond increase simultaneously. According to above results, DLC film deposited using the electrolyte of acetonitrile was more suitable used for coating on Si ¡Vbased optoelectronic devices such as solar cell to be a protective layer and/or anti-reflection layer. Additionally, for the nitrogen doing in DLC film, it can increase the adhesion and the friction of film to utilize for mechanic industry and to develop as the window layer of solar cells. Although there are few N-content incorporated in the DLC film, and that limits its applications. However, it still has a high potential used for solar cells and leads to advanced study in the future.

Diamond-Like carbon (DLC)films have received a considerable amount ofwear resistant overcoat and biocompatible coatings. attention recently due to their chemical stability, high optical transparency and hardness. These properties make the films suitable for a number of applications such as protective and anti-reflection coating. Due to environmental pollution, double or multilayered coatings were recently developed as a new generation of protective coating. The present development hybrid coating system HBS900,is combination of hard coatings titanium nitride (TiN) and titanium carbonitride (TiCN) as multilayer are generated by cathode arc vaporization and magnetron sputtering, then on it following is high quality of diamond-like carbon film deposited by high degree of ionization, high densities of ions of electron cyclotron resonance plasma in the same recipient. It made the tools longer lifetime combination of outer lubrication layer. Not only using the high resistance and wear out of the inter multilayer, but also increasing the adhesion of DLC. The structural characteristics of DLC films were investigated by Raman spectroscopy, standard scratch, pin-on-disk test and microhardness. It made the film more graphite-like by higher substrate bias, higher process pressure, and higher ECR power The characteristics of the back stamper surface coated by DLC film were improved, and the productivity of an optical disk per stamper was estimated at about 1.7 times more than obtained. The properties of DLC films coating on the tamper were obtained and summarized as follows: excellent adhesion 65N, and coefficients of friction less than 0.15. As a result of adapting a microdrill coated with DLC film, the drilling lifetime was significantly improved to reach about 2.5 times than that of the uncoated one. The purpose of this research was to deposit the protective diamond-like carbon (DLC) films on polycarbonate substrates for optical applications. The oxygen plasma pretreatment of the substrate surface, silicon-incorporated diamond-like carbon films (DLC-Si), and the coating deposition conditions can enhance the adhesion of the DLC film. The coated DLC film showed better adhesion on the PC substrate surface under three tests as the alcohol rub test, a tape pull test, and a thermal shock test. The reactive CH4 (30sccm), the substrate bias (-100 V), the RF power (300 W), and In experiments, it is preceded being focus on the analysis of Raman spectrum for the films grown at various CH4 gas fluxes, substrates bias voltages, and higher si-doping concentrations made the film the better characteristics, the lower surface roughness, and higher hardness and adhesion. At least, the properties of diamond-like carbon (DLC) film coatings on phase-change recording media were characterized by Raman spectroscopy, atomic force microscope (AFM), UV-visible spectrometer and disc testers. The dependence of mechanical, optical and structural properties of DLC films included the characteristics of surface roughness, hardness, transmittance and electrical signals of discs on serveral DLC film thicknesses were investigated. Our experimental results indicate that DLC films provide a suitable coating to protect PC substrate and make it no difference for data stored on phase-change optical discs.

A hybrid physical vapor deposition- electron cyclotron resonance-chemical vapor deposition (PVD-ECRCVD) coating system HBS900 is used to deposit the diamond-like carbon (DLC) film on the microdrills. It could keep friction low results in improving the productivity of the drill holes on the printed circuit board (PCB). In order to improve the adhesion strength of the DLC films,functionally gradient Ti/TiN/TiCN supporting multilayer were pre-deposited initially on the microdrills. The hard coatings of titanium nitride (TiN) and titanium carbonitride (TiCN) as multilayer are deposited by PVD with high rate coating sources based on the principle of electrical arc vaporization and magnetron sputtering process. The on it following dry lubricant coating is composed of amorphous, diamond like carbon (DLC) deposited by ECRCVD plasma in the same recipient. The structural characteristics of DLC films were investigated by Raman spectroscopy and standard scratch and pin-on-disk test.The properties of DLC films coating on the microdrills are obtained and summarized as follows: excellent adhesion 65N, and coefficients of friction less than 0.15. After micro-hole drilling, we obtained the high quality drilled hole from the inspection of roughness and nailheading. As a result of adapting a microdrill coated with DLC film, the drilling lifetime was significantly improved to reach about 2.5 times than that of the uncoated one.

The purpose of this research was to deposit the protective diamond-like carbon (DLC) films on polycarbonate substrates for optical applications. In this study, by using the PECVD method is the better way to deposit DLC film on polycarbonate substrates since the whole process were performed at low temperature to avoiding any degradation of the adhesion of DLC film on polycarbonate substrates occurred at high temperature. In order to further increase the adhesion between the polycarbonate substrates and the DLC film, we deposited the SiO2 layer as an interlayer, and select HMDSO as precursor because it contain Si and O atoms. It is because that SiOx films that can be deposited from HMDSO/oxyzen feeds are relatively hard and against mechanical damages due to forming the glass-link structure. In addition, SiOx films are fully transparent in the UV range and decrease the difference of TCE ( thermal expansion coefficient) of PC and coating films. In experiments, it is preceded being focus on the analysis of Raman spectrum for the films grown at various CH4 gas fluxes, substrates bias voltages, Si-doping concentrations and the distance of electrode separation. The dependence of the intensity ratio of D-band and G-band ( ID/IG ) on the surface roughness, hardness and mechanical properties were investigated, and the adhesion of coating layer depends on the thickness of intermediate layer were studied under various substrate bias voltage. At least, the properties of diamond-like carbon (DLC) film coatings on phase-change recording media were characterized by Raman spectroscopy, atomic force microscope (AFM), UV-visible spectrometer and disc testers. The dependence of mechanical, optical and structural properties of DLC films included the characteristics of surface roughness, hardness, transmittance and electrical signals of discs on serveral DLC film thicknesses were investigated. Our experimental results indicate that DLC films provide a suitable coating to protect PC substrate and make it no difference for data stored on phase-change optical discs.

Diamond-Like carbon (DLC) films has a lot of advantages, such as high hardness, high thermal conductivity, low expansion coefficient, low friction coefficient, high chemical stability, high impedance. These properties make the DLC films suitable for becoming an insulator in metal insulator semiconductor structure. In this study, DLC films were deposited by electro-deposition technique onto silicon (Si) substrates, in which a mixture of acetic acid and water is used as the electrolyte. The structure of the DLC films is characterized by Raman Spectroscopy. The thermal evaporation technique was used to deposit an aluminum films on the DLC/Si-substrates, to make it as the structure of metal-insulator semiconductor (MIS), and the electrical properties of the MIS were measured by semiconductor parameter analyzer. DLC films were deposited by varying the parameters of electro-deposition process included mainly as the concentration of solution, the spacing between electrode and silicon substrate, deposition temperature, and the applied voltages. The properties and film growth of DLC attributed to the effect of parameters were described in detail. Finally, an electro-deposition model is obtained to describe the growth mechanism of electro-deposition of DLC film.

Diamond-Like Carbon (DLC) films have been deposited on different substrates such as p-type Silicon substrate and ITO glass substrate. DLC thin film was electrodeposited at low DC potential using a mixture of acetic acid and DI water. The DLC film deposition parameters include DC potential, deposited temperature, solution concentration, are used to study the characteristics of DLC film in detail. In addition, the growth mechanism of deposition process is also discussed. We are to improve and to solve the edge induced effect on inhomogeneous film thickness during electrodeposition. The Raman spectra shows two peaks located near 1358cm-1 and 1580cm-1, assigned as the characteristics peaks of DLC films. That is an evidence for DLC film deposited successfully on ITO glass and Silicon substrates. Scanning electron microscopy (SEM) can make insight into accurately the surface morphology and uniformity of DLC films so as used to grow the best quality of DLC films. Finally, N-type of doped DLC films has been achieved on p-type silicon substrate to form the hetero-junction diode, and the intrinsic DLC film acts as the insulating layer for MIS structure is also obtained. The electrical characteristics of hetero-junction diode and MIS devices are presented and to be discussed in future.