scholarly journals High depth-resolution laser ablation chemical analysis of additive-assisted Cu electroplating for microchip architectures

2015 ◽  
Vol 30 (12) ◽  
pp. 2371-2374 ◽  
Author(s):  
A. Riedo ◽  
V. Grimaudo ◽  
P. Moreno-García ◽  
M. B. Neuland ◽  
M. Tulej ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Chemical Analysis ◽  
Grain Boundary ◽  
Depth Resolution ◽  
Boundary Analysis ◽  
Highly Sensitive ◽  
Cu Electroplating ◽  
First Time ◽  
High Depth

Highly sensitive LIMS measurements allow for the first time quantitative grain boundary analysis at the nanometre regime.

Direct Measurement of the Subsurface Hydrogen Barrier Layer in Plasma-Treated Silicon Ribbon

1985 ◽  
Vol 46 ◽  
Author(s):  
A.E. Jaworowski ◽  
L.S. Wielunski ◽  
T.W. Listerman
Keyword(s):  
Barrier Layer ◽  
Direct Method ◽  
Depth Resolution ◽  
Surface Region ◽  
Near Surface ◽  
Surface Hydrogen ◽  
Plasma Treatments ◽  
Silicon Ribbon ◽  
First Time ◽  
High Depth

AbstractThe near-surface hydrogen profile was measured using the 15N hydrogen profiling technique in silicon ribbon grown by the edge-defined film-fed growth (EFG) process. This direct method has a high depth resolution of 10 - 30 Å, can be used to a depth of several microns, and can measure hydrogen in concentration of 100 at. ppm. By appropriate surface treatment we were able to observe for the first time the separation of the near-surface hydrogen profile in silicon from the surface hydrogen contamination layer. Using our technique, hydrogen profiling of the near-surface region revealed the existence of a subsurface hydrogen layer which acts as a barrier to the transfer of hydrogen into the bulk of both passivated and untreated silicon. The structure of this hydrogen barrier was measured for different plasma treatments.

A New Numerical Model for Electron-Probe Analysis at High Depth Resolution

1996 ◽  
Vol 54 ◽  
pp. 490-491
Author(s):  
P.-F. Staub ◽  
C. Bonnelle ◽  
F. Vergand ◽  
P. Jonnard
Keyword(s):  
Electron Probe ◽  
Surface Segregation ◽  
Depth Distribution ◽  
Computing Time ◽  
Depth Resolution ◽  
Physical Parameters ◽  
Electron Probe Analysis ◽  
Interface Phases ◽  
Excitation Conditions ◽  
High Depth

Characterizing dimensionally and chemically nanometric structures such as surface segregation or interface phases can be performed efficiently using electron probe (EP) techniques at very low excitation conditions, i.e. using small incident energies (0.5<E0<5 keV) and low incident overvoltages (1<U0<1.7). In such extreme conditions, classical analytical EP models are generally pushed to their validity limits in terms of accuracy and physical consistency, and Monte-Carlo simulations are not convenient solutions as routine tools, because of their cost in computing time. In this context, we have developed an intermediate procedure, called IntriX, in which the ionization depth distributions Φ(ρz) are numerically reconstructed by integration of basic macroscopic physical parameters describing the electron beam/matter interaction, all of them being available under pre-established analytical forms. IntriX’s procedure consists in dividing the ionization depth distribution into three separate contributions:

Atomic emission spectrometry analysis of metals and alloys using a two-jet arc plasma with spark sampling and calibration by solutions

2021 ◽  
Author(s):  
A. V. Kuptsov ◽  
A. V. Volzhenin ◽  
V. A. Labusov ◽  
A. I. Saprykin
Keyword(s):  
Chemical Analysis ◽  
Atomic Emission ◽  
Metals And Alloys ◽  
Atomic Emission Spectrometry ◽  
Emission Spectrometry ◽  
Quantitative Chemical Analysis ◽  
Arc Plasma ◽  
Spectrometry Analysis ◽  
First Time ◽  
Quantitative Chemical

For the first time, the injection of solutions into the plasma of a two-jet arc plasmatron was used for the analysis of metals and alloys. Tandem calibration was used for quantitative chemical analysis by the TJP-AES method.

Grain boundary analysis in TEM. I. Practical determination of bicrystal orientations

1978 ◽  
Vol 50 (2) ◽  
pp. 703-709 ◽  
Author(s):  
Th. Karakostas ◽  
G. Nouet ◽  
G. L. Bleris ◽  
S. Hagege ◽  
P. Delavignette
Keyword(s):  
Grain Boundary ◽  
Boundary Analysis

scholarly journals Direct Chemical Analysis of Solids by Laser Ablation in an Ion Storage Time-of-Flight Mass Spectrometer

2004 ◽  
Vol 76 (5) ◽  
pp. 1249-1256 ◽  
Author(s):  
Gregory L. Klunder ◽  
Patrick M. Grant ◽  
Brian D. Andresen ◽  
Richard E. Russo
Keyword(s):  
Laser Ablation ◽  
Chemical Analysis ◽  
Mass Spectrometer ◽  
Storage Time ◽  
Time Of Flight ◽  
Flight Mass Spectrometer ◽  
Ion Storage

A study of underwater stand-off laser-induced breakdown spectroscopy for chemical analysis of objects in the deep ocean

2015 ◽  
Vol 30 (5) ◽  
pp. 1050-1056 ◽  
Author(s):  
F. J. Fortes ◽  
S. Guirado ◽  
A. Metzinger ◽  
J. J. Laserna
Keyword(s):  
Chemical Analysis ◽  
Deep Ocean ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Submerged Objects ◽  
First Time

In this work, we demonstrate for the first time the feasibility of stand-off laser induced breakdown spectroscopy (ST-LIBS) for the analysis of distant submerged objects.

A novel high-resolution laser-melting sampler for discrete analyses of ion concentrations and stable water isotopic compositions in firn and ice cores

2021 ◽  
Author(s):  
Yuko Motizuki ◽  
Yoichi Nakai ◽  
Kazuya Takahashi ◽  
Junya Hirose ◽  
Yu Vin Sahoo ◽  
...  
Keyword(s):  
Ice Core ◽  
Ice Cores ◽  
Depth Resolution ◽  
Climatic Changes ◽  
Accumulation Rates ◽  
Laser Melting ◽  
Ion Concentrations ◽  
Annual Layer ◽  
Annual Resolution ◽  
High Depth

&lt;p&gt;Ice cores preserve past climatic changes and, in some cases, astronomical signals. Here we present a newly developed automated ice-core sampler that employs laser melting. A hole in an ice core approximately 3 mm in diameter is melted and heated well below the boiling point by laser irradiation, and the meltwater is simultaneously siphoned by a 2 mm diameter movable evacuation nozzle that also holds the laser fiber. The advantage of sampling by laser melting is that molecular ion concentrations and stable water isotope compositions in ice cores can be measured at high depth resolution, which is advantageous for ice cores with low accumulation rates. This device takes highly discrete samples from ice cores, attaining depth resolution as small as ~3 mm with negligible cross contamination; the resolution can also be set at longer lengths suitable for validating longer-term profiles of various ionic and water isotopic constituents in ice cores. This technique allows the detailed reconstruction of past climatic changes at annual resolution and the investigation of transient ionic and isotopic signals within single annual layers in low-accumulation cores, potentially by annual layer counting.&lt;/p&gt;

Intramolecular photoinitiator induced atom transfer radical polymerization for electrochemical DNA detection

The Analyst ◽  
2020 ◽  
Vol 145 (3) ◽  
pp. 858-864
Author(s):  
Ligang Ma ◽  
Qianrui Liu ◽  
Lihe Jian ◽  
Shan Ye ◽  
Xiaoke Zheng ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Electrochemical Biosensor ◽  
Dna Detection ◽  
Atom Transfer ◽  
Highly Sensitive ◽  
Electrochemical Dna Detection ◽  
First Time

A novel electrochemical biosensor was reported for the first time to achieve highly sensitive DNA detection based on photoinduced atom transfer radical polymerization (photoATRP).

scholarly journals Analysis of free and protein-bound nitrotyrosine in human plasma by a gas chromatography/mass spectrometry method that avoids nitration artifacts

2000 ◽  
Vol 345 (3) ◽  
pp. 453-458 ◽  
Author(s):  
Matthew T. FROST ◽  
Barry HALLIWELL ◽  
Kevin P. MOORE
Keyword(s):  
Reactive Nitrogen Species ◽  
Plasma Proteins ◽  
Biological Fluids ◽  
Plasma Concentrations ◽  
Normal Subjects ◽  
Gas Chromatography Mass Spectrometry ◽  
Highly Sensitive ◽  
Acidic Conditions ◽  
First Time

Measurement of nitrotyrosine in biological fluids and tissues is increasingly being used to monitor the production of reactive nitrogen species in vivo. The detection of nitrotyrosine in vivo has been reported with the use of a variety of methods including immunoassay, HPLC and GLC/MS. The validity of HPLC and immunoassays have been questioned with regard to their selectivity and sensitivity limits. In principle, the measurement of nitrotyrosine by GLC/MS permits a highly specific, highly sensitive and fully quantitative assay. The nitration of tyrosine under acidic conditions in the presence of nitrite is well documented. Derivatization for the full quantification of nitrotyrosine by using GLC/MS can lead to the artifactual nitration of tyrosine if performed under acidic conditions in the presence of nitrite. We describe a novel alkaline method for the hydrolysis and derivatization of nitrotyrosine and tyrosine, and demonstrate its applicability to the measurement of plasma concentrations of both free and protein-bound nitrotyrosine and tyrosine. A detection limit of 1 pg for nitrotyrosine and 100 pg for tyrosine has been achieved. Our method allows, for the first time, the analysis of free and protein-bound nitrotyrosine and tyrosine in biological samples. The plasma concentrations (means±S.E.M.) of free tyrosine and nitrotyrosine in eight normal subjects were 12±0.6 μg/ml and 14±0.7 ng/ml respectively. Plasma proteins contained tyrosine and nitrotyrosine at 60.7±1.7 μg/mg and 2.7±0.4 ng/mg respectively.

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