FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3022425266> ?p ?o ?g. }

• W3022425266 endingPage "882" @default.
• W3022425266 startingPage "868" @default.
• W3022425266 abstract "Infrared reflectance analysis is facilitated via the comparison of spectra recorded in situ to a databank of actual or synthetic infrared reflectance spectra. It has recently been shown that reference spectra corresponding to the many different morphological forms of the same chemical can be generated synthetically using the imaginary, k, and real, n, components of the complex refractive index, [Formula: see text] = n + i k. One method to obtain the n and k vectors is infrared ellipsometry, which measures the changes in amplitude, tan Ψ, and phase, Δ, of polarized light reflected from the sample both as a function of wavenumber and angle of incidence. The method requires specularly reflected light, so best results are usually obtained with polished planar samples of large surface area. Due to the difficulties of obtaining such samples, however, we investigate the possibility of pressing powders of neat materials and obtaining the corresponding optical constants from the pellets. In this paper, variability in the sample pellet and preparation method is investigated, as is variability in the fitting procedure for the derived optical constants. The n/k vectors are derived from the measured ellipsometric parameters, tan ψ and Δ, as they are fit by an oscillator model which yield n([Formula: see text]) and k([Formula: see text]) vectors as a function of wavenumber, [Formula: see text]. Construction of the oscillator model is not automatic and depends on significant input from the analyst as well as the sample’s physical characteristics. For pellet pressing, the experimental variability was found to be minimized for size-selected powdered samples as gauged by the minimal variance in ψ and Δ for three different pellets; similarly, the analytical precision for multiple measurements of the same pellet was also quite good, suggesting that a pressed pellet is a viable sample preparation method. Experimental variabilities were comparatively small; the greatest variability came in the analytic fitting procedure with differences in the k-peak values up to 10% for only the sharpest bands arising from four different fits to the same data set. The final ellipsometric n/k data are compared to literature values obtained from crystalline ammonium sulfate ((NH 4 ) 2 SO 4 ) samples as well as single-angle reflectance measurements that also used pressed pellets. Comparison with the previous literature values shows generally good agreement, although larger k-values are observed for the independent sets of data derived from pressed pellets. These data are suggested as an improved set of optical constants for (NH 4 ) 2 SO 4 ." @default.
• W3022425266 created "2020-05-13" @default.
• W3022425266 creator A5042983462 @default.
• W3022425266 creator A5054305913 @default.
• W3022425266 creator A5061627667 @default.
• W3022425266 creator A5064263685 @default.
• W3022425266 creator A5080500716 @default.
• W3022425266 date "2020-06-12" @default.
• W3022425266 modified "2023-09-26" @default.
• W3022425266 title "Improved Infrared Optical Constants from Pressed Pellets: II. Ellipsometric <i>n</i> and <i>k</i> Values for Ammonium Sulfate with Variability Analysis" @default.
• W3022425266 cites W1516479638 @default.
• W3022425266 cites W1628375235 @default.
• W3022425266 cites W1663837838 @default.
• W3022425266 cites W1972862937 @default.
• W3022425266 cites W1975538491 @default.
• W3022425266 cites W1988603739 @default.
• W3022425266 cites W1992028193 @default.
• W3022425266 cites W2013595785 @default.
• W3022425266 cites W2017798508 @default.
• W3022425266 cites W2030357483 @default.
• W3022425266 cites W2035872269 @default.
• W3022425266 cites W2056598971 @default.
• W3022425266 cites W2062081790 @default.
• W3022425266 cites W2063383978 @default.
• W3022425266 cites W2063696004 @default.
• W3022425266 cites W2066696084 @default.
• W3022425266 cites W2079712012 @default.
• W3022425266 cites W2084701001 @default.
• W3022425266 cites W2084984003 @default.
• W3022425266 cites W2101729189 @default.
• W3022425266 cites W2141421435 @default.
• W3022425266 cites W2141578665 @default.
• W3022425266 cites W2318983862 @default.
• W3022425266 cites W2611086737 @default.
• W3022425266 cites W2739120785 @default.
• W3022425266 cites W2760538830 @default.
• W3022425266 cites W2886072166 @default.
• W3022425266 cites W2886525606 @default.
• W3022425266 cites W2955616338 @default.
• W3022425266 cites W2974945483 @default.
• W3022425266 cites W4249556850 @default.
• W3022425266 cites W993806645 @default.
• W3022425266 doi "https://doi.org/10.1177/0003702820928358" @default.
• W3022425266 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32367728" @default.
• W3022425266 hasPublicationYear "2020" @default.
• W3022425266 type Work @default.
• W3022425266 sameAs 3022425266 @default.
• W3022425266 citedByCount "8" @default.
• W3022425266 countsByYear W30224252662020 @default.
• W3022425266 countsByYear W30224252662021 @default.
• W3022425266 countsByYear W30224252662022 @default.
• W3022425266 crossrefType "journal-article" @default.
• W3022425266 hasAuthorship W3022425266A5042983462 @default.
• W3022425266 hasAuthorship W3022425266A5054305913 @default.
• W3022425266 hasAuthorship W3022425266A5061627667 @default.
• W3022425266 hasAuthorship W3022425266A5064263685 @default.
• W3022425266 hasAuthorship W3022425266A5080500716 @default.
• W3022425266 hasConcept C113196181 @default.
• W3022425266 hasConcept C120665830 @default.
• W3022425266 hasConcept C121130766 @default.
• W3022425266 hasConcept C121332964 @default.
• W3022425266 hasConcept C1276947 @default.
• W3022425266 hasConcept C134121241 @default.
• W3022425266 hasConcept C153642686 @default.
• W3022425266 hasConcept C158355884 @default.
• W3022425266 hasConcept C159985019 @default.
• W3022425266 hasConcept C171250308 @default.
• W3022425266 hasConcept C178790620 @default.
• W3022425266 hasConcept C180205008 @default.
• W3022425266 hasConcept C18293161 @default.
• W3022425266 hasConcept C185592680 @default.
• W3022425266 hasConcept C19067145 @default.
• W3022425266 hasConcept C192562407 @default.
• W3022425266 hasConcept C2780584874 @default.
• W3022425266 hasConcept C42067758 @default.
• W3022425266 hasConcept C43617362 @default.
• W3022425266 hasConcept C4839761 @default.
• W3022425266 hasConcept C97355855 @default.
• W3022425266 hasConceptScore W3022425266C113196181 @default.
• W3022425266 hasConceptScore W3022425266C120665830 @default.
• W3022425266 hasConceptScore W3022425266C121130766 @default.
• W3022425266 hasConceptScore W3022425266C121332964 @default.
• W3022425266 hasConceptScore W3022425266C1276947 @default.
• W3022425266 hasConceptScore W3022425266C134121241 @default.
• W3022425266 hasConceptScore W3022425266C153642686 @default.
• W3022425266 hasConceptScore W3022425266C158355884 @default.
• W3022425266 hasConceptScore W3022425266C159985019 @default.
• W3022425266 hasConceptScore W3022425266C171250308 @default.
• W3022425266 hasConceptScore W3022425266C178790620 @default.
• W3022425266 hasConceptScore W3022425266C180205008 @default.
• W3022425266 hasConceptScore W3022425266C18293161 @default.
• W3022425266 hasConceptScore W3022425266C185592680 @default.
• W3022425266 hasConceptScore W3022425266C19067145 @default.
• W3022425266 hasConceptScore W3022425266C192562407 @default.
• W3022425266 hasConceptScore W3022425266C2780584874 @default.
• W3022425266 hasConceptScore W3022425266C42067758 @default.
• W3022425266 hasConceptScore W3022425266C43617362 @default.
• W3022425266 hasConceptScore W3022425266C4839761 @default.

• next