Non-Destructive Sub-Surface Chemical Characterization of Air-Exposed Plasma Polymers by Energy-Resolved XPS

2009 ◽  
Vol 7 (6) ◽  
pp. 474-481 ◽  
Author(s):  
Pierre-Luc Girard-Lauriault ◽  
Iris Retzko ◽  
Sufal Swaraj ◽  
Nobuyuki Matsubayashi ◽  
Thomas Gross ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Surface Chemical ◽  
Plasma Polymers ◽  
Non Destructive

Handheld Portable Energy-Dispersive X-Ray Fluorescence Spectrometry (pXRF)

2016 ◽  
pp. 362-381 ◽  
Author(s):  
Elisabeth Holmqvist
Keyword(s):  
Production Systems ◽  
Matrix Effects ◽  
Chemical Characterization ◽  
High Sensitivity ◽  
Limited Range ◽  
Energy Dispersive ◽  
Analytical Sensitivity ◽  
X Ray ◽  
Non Destructive

Handheld portable energy-dispersive X-ray fluorescence (pXRF) spectrometry is used for non-destructive chemical characterization of archaeological ceramics. Portable XRF can provide adequate analytical sensitivity to discriminate geochemically distinct ceramic pastes, and to identify compositional clusters that correlate with data patterns acquired by NAA or other high sensitivity techniques. However, successful non-destructive analysis of unprepared inhomogeneous ceramic samples requires matrix-defined scientific protocols to control matrix effects which reduce the sensitivity and precision of the instrumentation. Quantification of the measured fluorescence intensities into absolute concentration values and detection of light elements is encumbered by the lack of matrix matched calibration and proper vacuum facilities. Nevertheless, semi-quantitative values for a limited range of high Z elements can be generated. Unstandardized results are difficult to validate by others, and decreased analytical resolution of non-destructive surface analysis may disadvantage site-specific sourcing, jeopardize correct group assignments, and lead to under-interpretation of ceramic craft and production systems.

Surface Chemical Characterization of Copper Oxide and its Relationship to Adhesion in Formed Epoxy/Copper Interfaces

1999 ◽  
Vol 69 (1-2) ◽  
pp. 165-179 ◽  
Author(s):  
B. J. Love ◽  
J. Baborowski ◽  
M. Charbonnier ◽  
M. Romand
Keyword(s):  
Copper Oxide ◽  
Chemical Characterization ◽  
Surface Chemical

scholarly journals Surface Chemical Characterization of Bastnaesite through Electrokinetics

2015 ◽  
Vol 32 (0) ◽  
pp. 176-183 ◽  
Author(s):  
Pradip ◽  
Charles C. H. Li ◽  
Douglas W. Fuerstenau
Keyword(s):  
Chemical Characterization ◽  
Surface Chemical

Beyond Death: Forensic Investigations of pre-Columbian Mummies from the Tarapacá Valley, Chile, Using Variable Pressure SEM and Raman Spectroscopy

2007 ◽  
Vol 15 (6) ◽  
pp. 6-11 ◽  
Author(s):  
S.V. Prikhodko ◽  
C. Fischer ◽  
R. Boytner ◽  
M. C. Lozada ◽  
M. Uribe ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Chemical Characterization ◽  
Quantitative Information ◽  
Mortuary Practices ◽  
Variable Pressure ◽  
Scientific Investigations ◽  
Non Invasive ◽  
Archaeological Materials ◽  
Non Destructive

Variable pressure scanning electron microscopy (VPSEM) coupled with other non-destructive analytical methods, such as energy dispersive (EDS) and Raman spectroscopy (RS) offers new capabilities for non-invasive imaging and chemical characterization of archaeological materials. This article underlines the application of VPSEM-EDS-RS on bioarchaeological specimens of pre-Columbian mummies from the Tarapacá Valley in northern Chile. The aim of the scientific investigations is to identify nonanatomical features and to provide qualitative and quantitative information at molecular levels, complementing the morphological record from studies in physical anthropology, in an effort to understand mortuary practices in the Tarapacá Valley and the effects of the burial environment in the preservation of mummified human remains.

Durability of a ventilated stone facade: A case study of a limestone facade affected by the corrosion of the anchorage system

2020 ◽  
Author(s):  
Vera Pires de Almeida Ribeiro
Keyword(s):  
Chemical Characterization ◽  
Masonry Walls ◽  
Concrete Walls ◽  
Reinforced Concrete Walls ◽  
Correct Execution ◽  
Anchoring System ◽  
Ventilated Facade ◽  
Non Destructive

<p>The mechanical behavior of a natural stone ventilated facade is inevitably based on the correct execution of both anchoring elements, stone cladding and enclosure support, either with brick masonry walls or reinforced concrete walls. In the case studied in the present work, the origin of the damages on the facade of a building located in Lisbon has been analyzed, where stone detachments were starting to occur. This enclosure is a ventilated facade cladded with Portuguese limestone Lioz slabs. Non-destructive borescope analysis of the metallic anchoring system employed was performed, as well as X-Ray fluorescence laboratory analysis (FRX) for chemical characterization of the anchoring material. Results obtained demonstrated the problem cause on the stone facade due to incorrect metallic anchoring selection and poor execution combined with stress corrosion effect, especially for slabs with larger dimensions.</p>

Surface chemical characterization of steel clutch plate in ATF

2016 ◽  
Vol 102 ◽  
pp. 319-325 ◽  
Author(s):  
Shaohui Li ◽  
Zechao Di ◽  
Liang Cheng ◽  
Zhongguo Liu ◽  
Jicheng Piao ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Surface Chemical

Surface Chemical Characterization of Internal Interfaces Generated Within Thin-Film Fe-Ti Hydrides

1987 ◽  
Vol 111 ◽  
Author(s):  
Jeffrey H. Sanders ◽  
Bruce J. Tatarchuk
Keyword(s):  
Depth Profiling ◽  
Chemical Characterization ◽  
Decomposition Process ◽  
Surface Chemical ◽  
State Information ◽  
Size Information ◽  
Excellent Candidate ◽  
And Migration ◽  
Insight Into

AbstractFeTi is considered an excellent candidate for the reversible storage of hydrogen and has been studied extensively in an attempt to understand the bulk activation needed for this material before use. Segregation of TiO2 to the surface has been noted to occur during activation explaining a slight loss of efficiency per hydride cycle, however, characterization by a host of bulk and surface sensitive techniques has not revealed the cause of this decomposition process.10 nm FeTi samples were prepared in a UHV evaporator both with and without palladium coatings. Post treatment characterization was performed with backscatter conversion electron Mossbauer spectroscopy (CEMS), XPS and SIMS. CEMS is a powerful tool for providing stoichiometric, electronic, magnetic, chemical, and particle size information of iron at depths down to 100 nm. XPS and SIMS are useful to gain quantitative and chemical state information from the topmost 2 nm and the topmost monolayer, respectively. Activation treatments consisted of annealing at 573K and 623K followed by reduction at 573K. Results indicate that ppm levels of H2O in H2 are sufficient to decompose the FeTi alloy and produce TiO2 and Fe metal domains at the surface. Also, at 573K in vacuum, a solid-state reaction was found to occur between Fe oxides and FeTi to produce Fe metal and TiO2. The Pd-FeTi interface was probed with CEMS and the results demonstrate hydrogen dissociation and migration in the absence of alloy decomposition. Our approach uses nondestructive-depth profiling of non-Pd coated FeTi samples along with interfacial information from Pd-FeTi specimens to obtain unique insight into the decomposition process.

Surface chemical characterization of nanoparticle coated paperboard

2012 ◽  
Vol 258 (7) ◽  
pp. 3119-3125 ◽  
Author(s):  
Milena Stepien ◽  
Jarkko J. Saarinen ◽  
Hannu Teisala ◽  
Mikko Tuominen ◽  
Mikko Aromaa ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Surface Chemical
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