Role of gas feed delivery and dilutent on oxide etching in an inductively coupled plasma etch system

1998 ◽  
Vol 16 (3) ◽  
pp. 1459-1463 ◽  
Author(s):  
M. J. Lercel ◽  
D. Dang ◽  
N. Marmillion ◽  
W. Mlynko
Keyword(s):  
Inductively Coupled Plasma ◽  
Plasma Etch ◽  
Inductively Coupled ◽  
Oxide Etching

scholarly journals Authentication and Traceability Study on Barbera d’Asti and Nizza DOCG Wines: The Role of Trace- and Ultra-Trace Elements

Beverages ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 63
Author(s):  
Maurizio Aceto ◽  
Federica Gulino ◽  
Elisa Calà ◽  
Elisa Robotti ◽  
Maurizio Petrozziello ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Multivariate Data Analysis ◽  
Market Value ◽  
Elemental Distribution ◽  
Average Price ◽  
Chemical Markers ◽  
Grape Variety ◽  
Inductively Coupled ◽  
Ultra Trace

Barbera d’Asti—including Barbera d’Asti superiore—and Nizza are two DOCG (Denominazione di Origine Controllata e Garantita) wines produced in Piemonte (Italy) from the Barbera grape variety. Differences among them arise in the production specifications in terms of purity, ageing, and zone of production, in particular with concern to Nizza, which follows the most stringent rules, sells at three times the average price, and is considered to have the highest market value. To guarantee producers and consumers, authentication methods must be developed in order to distinguish among the different wines. As the production zones totally overlap, it is important to verify whether the distinction is possible or not according to metals content, or whether chemical markers more linked to winemaking are needed. In this work, Inductively Coupled Plasma (ICP) elemental analysis and multivariate data analysis are used to study the authentication and traceability of samples from the three designations of 2015 vintage. The results show that, as far as elemental distribution in wine is concerned, work in the cellar, rather than geographic provenance, is crucial for the possibility of distinction.

Fabrication and repair of GaN nanorods by plasma etching with self-assembled nickel nanomasks

2021 ◽  
Author(s):  
Shiying Zhang ◽  
Lei Zhang ◽  
Yueyao Zhong ◽  
Guodong Wang ◽  
Qingjun Xu
Keyword(s):  
Inductively Coupled Plasma ◽  
Average Diameter ◽  
Etching Time ◽  
X Ray Diffraction ◽  
Plasma Etch ◽  
Inductively Coupled ◽  
Icp Etching ◽  
Self Organized ◽  
Gan Film ◽  
Koh Etching

High crystal quality GaN nanorod arrays were fabricated by inductively coupled plasma (ICP) etching using self-organized nickel (Ni) nano-islands mask on GaN film and subsequent repaired process including annealing in ammonia and KOH etching. The Ni nano-islands have been formed by rapid thermal annealing, whose density, shape, and dimensions were regulated by annealing temperature and Ni layer thickness. The structural and optical properties of the nanorods obtained from GaN epitaxial layers were comparatively studied by high-resolution X-ray diffraction (HRXRD), Raman spectroscopy and photoluminescence (PL). The results indicate that damage induced by plasma can be successfully healed by annealing in NH3 at 900 °C. The average diameter of the as-etched nanorod was effectively reduced and the plasma etch damage was removed after a wet treatment process in a KOH solution. It was found that the diameter of the GaN nanorod was continuously reduced and the PL intensity first increased, then reduced and finally increased as the KOH etching time sequentially increased.

scholarly journals Comparison of Chromium and Iron Distribution in Serum and Urine among Healthy People and Prediabetes and Diabetes Patients

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Qi Zhou ◽  
Wenjia Guo ◽  
Yanan Jia ◽  
Jiancheng Xu
Keyword(s):  
Inductively Coupled Plasma ◽  
Chinese Population ◽  
Potential Role ◽  
Fasting Glucose ◽  
Inductively Coupled ◽  
Simvastatin Therapy ◽  
Plasma Spectrometer

The effect of chromium (Cr) and iron (Fe) on prevalence of diabetes has received great attention. This study investigated serum and urinary Cr and Fe levels among patients with impaired fasting glucose (IFG), impaired glucose tolerance (IGT), type 1 diabetes (T1D), and type 2 diabetes (T2D) in the Northeast Chinese population. From January 2010 to October 2011, patients with IFG (n=12), IGT (n=15), T1D (n=25), T2D (n=137) and healthy controls (n=50) were enrolled in the First Hospital of Jilin University. Trace elements were detected using an inductively coupled plasma spectrometer. Serum Cr levels decreased in T2D without complications, diabetic retinopathy (DR), diabetic peripheral neuropathy (DPN), and diabetic nephropathy (DN) (P<0.05). The urinary Cr level in T1D was the highest of all, which significantly exceeded those of the T2D groups with and without complications. No significant differences of serum Fe levels were found among all groups. The urinary Fe level of T1D was significantly increased (P<0.05). The correlation between serum Cr and serum Fe in T2D was obviously positive (P<0.05). One month of simvastatin therapy exerted no effects on serum or urinary Cr and Fe levels. These results suggest the potential role of Cr and Fe in diabetes should receive attention.

Instability of Si3N4/, SiC/, and MoSi2/ethanol suspensions

2003 ◽  
Vol 18 (1) ◽  
pp. 45-52 ◽  
Author(s):  
Yoko Fukada ◽  
Patrick S. Nicholson
Keyword(s):  
Photoelectron Spectroscopy ◽  
Inductively Coupled Plasma ◽  
Ammonium Hydroxide ◽  
Inductively Coupled ◽  
Transmission Electron ◽  
Tetramethyl Ammonium Hydroxide ◽  
Powder Addition ◽  
The Stability ◽  
Insight Into

Time-dependent suspension behavior is reported for nonoxide ceramic powders (Si3N4, SiC, and MoSi2) in ethanol. The suspension pH (and therefore the stability) changed with time. X-ray photoelectron spectroscopy, inert gas fusion, inductively coupled plasma, and high-resolution transmission electron microscopy were used to track changes of surface chemistry. The adsorption of the base, tetramethyl ammonium hydroxide (TMAH), is examined. The pH drop on powder addition to pure EtOH was used to gain insight into the role of TMAH coverage of the powder surfaces.

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