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By: NQ   -  In: Uncategorized   -  0   Comments


2014 has been a very profuse year in scientific publications on the subject of Glow Discharge Optical Emission Spectroscopy (GDOES) applications. More than 40 scientific articles and symposium communications have been published where GDOES is applied as a regular surface analysis technique for the characterization of materials where special treatments have been applied in order to improve their properties. Here is a selection of the most interesting works on this subject published in 2014.

Nanosecond laser surface modification of AISI 304L stainless steel: Influence the beam overlap on pitting corrosion resistance

In this paper, an AISI 304L stainless steel is surface modified by laser surface melting (LSM) with nanosecond laser pulses in order to study the influence of this treatment on surface corrosion behavior . The application of GDOES to the different treated and pristine samples, clearly reveals with a nanometer resolution that depth composition profile changes due to the treatment and those changes (mainly iron, chromium and oxygen relative contents) are in correlation with changes in surface corrosion behavior.

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Glow discharge optical emission spectroscopy: a complementary technique to analyze thin electrodeposited polyaniline films

In this paper published in January, the study is done over polyanline thin layers electrodeposited on Fluorine Tin oxide electrodes. In this study, GDOES clearly reveals how the excess of film precursor is eliminated by rinsing and partial de-doping also occurs due to the porosity of the substrate.

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Antimicrobial Activity of Thin Solid Films of Silver Doped Hydroxyapatite Prepared by Sol-Gel Method

In this work, the preparation and characterization of silver doped hydroxyapatite thin films were reported. The composites were characterized by various techniques such as Scanning electron microscopy (SEM) with energy Dispersive X-ray attachment (X-EDS), Fourier transform infrared spectroscopy (FT-IR), and glow discharge optical emission spectroscopy (GDOES). These techniques have permitted the structural and chemical characterisation of the silver doped hydroxyapatite thin films.

Many authors have shown that the optimization of chemical parameters requires adequate analytical techniques with good sensitivity, good reproducibility, and high depth resolution. Many previous studies have demonstrated the capability of GDOES for achieving these requirements.

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Optical Emission Spectrometry for Optimization of Steelmaking Processes

In this paper, GDOES is featured as a powerful tool for steel manufacturing control and optimization. The paper is in Chinese.

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Physical and tribological diagnostic of Ti-(Carbon Nitrides) and Ti-Nb-(Carbon Nitrides) coatings

Electrochemical, mechanical and tribological properties of Ti-C-N and Ti-Nb-C-N coatings deposited onto Si (100) and AISI 4140 steel substrates were determined in this work. Introduction of Nb in the ternary Ti C-N film was evaluated via quantitative elemental concentration depth profile by glow discharge optical emission spectroscopy (GDOES) and the morphology via scanning electron microscopy (SEM) were observed for the layers before the tests. The morphological surface was analyzed via AFM.

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Glow discharge techniques in the chemical analysis of photovoltaic materials

In this work different GD coupled analysis techniques are compared with the focus on photovoltaic materials. Techniques like GS-MS, GDOES are discussing showing by examples the application potential of GD techniques in a PV development or production process. For the first time, novel cell concepts based on crystalline silicon on glass and silicon nanowires are analyzed by GD-OES, revealing precise chemical information on the devices.

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Strip hollow cathode method for plasma thermochemical treatment for surface modification of thin metal strips: Plasma nitriding of austenitic stainless steel sheets for bipolar plates

In this work an austenitic thin steel strips are surface modified by means of plasma nitriding and the nitrided surface layers were studied by XRD and GDOES The diffusion coefficients of nitrogen under different treatment conditions are experimentally determined from GDOES depth profiles.

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 Study of the effects of E × B fields as mechanism to carbon–nitrogen plasma immersion ion implantation on stainless steel samples

In this study, GDOES is applied to measure the implantation process of nitrogen-carbon ions in stainless steel in a process of plasma immersion ion implantation (PIII). GDOES characterization reveals how the magnetic field influences the implantation patterns of C and N during the PIII process.

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 Investigation of the role of electrokinetic effects in corrosion deposit formation

In this work GDOES is applied to assess the thickness and structural composition of oxide layers formed on stainless steel electrodes after simulated corrosion in an electrochemical cell. GDOES characterization reveals that the cathodic sample has a simple Cr rich oxide layer structure and anodic sample forms a multilayered structure with at least three layers of different metal oxide composition.

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Wear and corrosion resistance of anti-bacterial Ti–Cu–N coatings on titanium implants

In this paper, GDOES reveals how a 6µm thick coating of antibacterial Ti- Cu-N is formed on a Ti substrate surface after magnetron sputtering deposition. It also gives information about quantitative elemental composition of the different layers and the deposition process mechanism.

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Addition of phosphates or copper nitrate in a fluotitanate conversion coating containing a silane coupling agent for aluminium alloy AA601

In this study a profuse use of GDOES is made to determine the structure and composition of a protecting complex coating for Al alloy AA601. Three different treated samples are analyzed by GDOES determining how the different elements are assembled on the coating structure.

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