A method for determining a property of an unknown material including the steps of determining the IR spectrum of the unknown material, fitting the IR spectrum to a linear combination of known spectra in a database, wherein a database includes spectra of reference materials whose assay properties...
As is the case when using any scientific instrument, you need to make sure the instrument is in good working order before using it to analyze a sample. Checking the response of the instrument for a known sample verifies that the instrument is properly calibrated. Spectrophotometers require period...
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ATR can be used to analyze a wide variety of solids and, depending on the ATR crystal’s structure, some liquids. It’s particularly useful for analyzing thick or multilayered samples such as paints, rubbers, plastics, or coatings. Specular Reflectance –Specular reflectance, or SR, spectroscopy...
Why Can the EQE Spectrum Be Used to Analyze Current Loss in Solar Cells?The operation of solar cells can be broadly divided into four processes: (1) Absorption, (2) Photocarrier Generation, (3) Transport, and (4) Collection. (1) Absorption of photons ...
Each material requires a certificate of analysis that will enable the pharmacopoeia scientists to qualify it as a reference standard that can be used by any company. The pharmacopoeia may also request a Safety Data Sheet (SDS) and other supporting data (e.g., infrared [IR] spectra, Raman ...
This study utilized a constant horizontal flow to analyze MP retention in porous media. As such, we expect gravitational forces to have a larger effect on the retention of suspended particles compared to vertical systems, as the force is perpendicular to the general fluid movement (Chrysikopoulos...
To interpret our model, we further analyze the random forest regression results using SHAP (Shapley Additive exPlanations)35, a generalized metric for feature importance, which utilizes the game-theory-based Shapley values to calculate the contribution of each feature to the model’s output. SHAP in...
which could be advantageous to charge extraction25. To find the underlying mechanism of the enhanced photocurrent and overall photovoltaic performances of the wrinkled morphology perovskite films, we have attempted to analyze microscopic dynamics of the photocarriers inside the films at the hill and vall...
They are revealed by both the ARPES spectra20,22 and large thermoelectric power9. To manifest such effects, the Coulomb on-site repulsion on Co-d orbitals is an indispensable component. In fact, the on-site Coulomb repulsion modifies the above picture in two fundamental ways. Firstly, the ...