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Yu Q, Wu D, Min H, Ma Y, Liu Y. Research on electrochemical behaviour of reference electrodes for corrosion test under high hydrostatic pressure for simulating deep-sea. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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2
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Reséndiz R, Rodríguez A, Larios E, Torres J, Castañeda F, Antaño-López R. Exploration of new analytical correlations as an alternative to the Kramers-Kronig transforms for the assessment of impedance spectroscopy data. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2021.115879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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3
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Guan F, Liu Z, Dong X, Zhai X, Zhang B, Duan J, Wang N, Gao Y, Yang L, Hou B. Synergistic effect of carbon starvation and exogenous redox mediators on corrosion of X70 pipeline steel induced by Desulfovibrio singaporenus. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 788:147573. [PMID: 34034174 DOI: 10.1016/j.scitotenv.2021.147573] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 04/29/2021] [Accepted: 05/02/2021] [Indexed: 06/12/2023]
Abstract
In microbiologically influenced corrosion (MIC) induced by sulfate-reducing bacteria (SRB), the electrons released from iron were transferred via extracellular electron transfer (EET) to the inner cells. Electron mediators and carbon starvation have also been found to promote steel corrosion. This study aimed to investigate the synergistic effects of electron mediators and carbon starvation on MIC and their effect on biofilm catalytic activity. The results demonstrated that the weight losses of X70 steel were 0.68 and 1.03 mg/cm2 in 100% and 10% carbon source (CS) SRB solution, respectively. The addition of riboflavin and cytochrome c increased the corrosion rate by 1.76 and 1.87 times, respectively, in the 100% CS SRB medium compared to the medium without exogenous redox mediators. For the 10% CS SRB medium, the corrosion rate increased by 1.40 and 1.89 times, respectively, when riboflavin and cytochrome c were added. The addition of riboflavin and cytochrome c also enhanced the biocatalytic activity of the SRB biofilm in both the 100% and 10% CS SRB media.
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Affiliation(s)
- Fang Guan
- Key Laboratory of Marine Environmental Corrosionand Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Zheng Liu
- Key Laboratory of Marine Environmental Corrosionand Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Xucheng Dong
- Key Laboratory of Marine Environmental Corrosionand Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaofan Zhai
- Key Laboratory of Marine Environmental Corrosionand Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - BinBin Zhang
- Key Laboratory of Marine Environmental Corrosionand Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Jizhou Duan
- Key Laboratory of Marine Environmental Corrosionand Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China.
| | - Nan Wang
- Key Laboratory of Marine Environmental Corrosionand Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Ying Gao
- Key Laboratory of Marine Environmental Corrosionand Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lihui Yang
- Key Laboratory of Marine Environmental Corrosionand Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
| | - Baorong Hou
- Key Laboratory of Marine Environmental Corrosionand Bio-Fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
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Application of the Kramers–Kronig relationships in the electrochemical impedance models fit. J Solid State Electrochem 2021. [DOI: 10.1007/s10008-021-04975-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Bahari HS, Ye F, Carrillo EAT, Leliopoulos C, Savaloni H, Dutta J. Chitosan nanocomposite coatings with enhanced corrosion inhibition effects for copper. Int J Biol Macromol 2020; 162:1566-1577. [PMID: 32784028 DOI: 10.1016/j.ijbiomac.2020.08.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/15/2020] [Accepted: 08/04/2020] [Indexed: 11/18/2022]
Abstract
A biopolymer coating on copper was prepared based on chitosan nanocomposite and its corrosion inhibition efficiency was investigated. Inclusion of silica nanoparticles substantially reduces swelling ratio of chitosan coating while enhancing its thermal stability. The corrosion resistance of chitosan-based coatings is improved by introducing 2-mercaptobenzothiazole and silica in the matrix. It is found that upon crosslinking the chitosan coatings, a higher corrosion resistance could be achieved and the highest inhibition efficiency for chitosan nanocomposite coatings is calculated as 85%. The corrosion mechanism is found closely related to mass transition and diffusion process, and also the polarization resistance contributes to the impedance. Calculated impedance using Kramers-Kronig transformation shows good agreement with experimental values, thus validating the impedance measurements. This study exhibits the enhanced efficiency of nanocomposite and potential of chitosan coatings in corrosion prevention for copper.
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Affiliation(s)
- Helma Sadat Bahari
- School of Physics, College of Science, University of Tehran, North-Kargar Street, P.O. Box 14395-547, Tehran, Iran; Functional Materials, Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, Hannes Alfvéns väg 12, 114 19 Stockholm, Sweden
| | - Fei Ye
- Functional Materials, Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, Hannes Alfvéns väg 12, 114 19 Stockholm, Sweden.
| | - Esteban Alejandro Toledo Carrillo
- Functional Materials, Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, Hannes Alfvéns väg 12, 114 19 Stockholm, Sweden
| | - Christos Leliopoulos
- Functional Materials, Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, Hannes Alfvéns väg 12, 114 19 Stockholm, Sweden
| | - Hadi Savaloni
- School of Physics, College of Science, University of Tehran, North-Kargar Street, P.O. Box 14395-547, Tehran, Iran
| | - Joydeep Dutta
- Functional Materials, Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, Hannes Alfvéns väg 12, 114 19 Stockholm, Sweden.
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Malkow T. Immittance Data Validation by Kramers-Kronig Relations - Derivation and Implications. ChemElectroChem 2018; 4:2777-2782. [PMID: 29577007 PMCID: PMC5861665 DOI: 10.1002/celc.201700630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Indexed: 11/09/2022]
Abstract
Explicitly based on causality, linearity (superposition) and stability (time invariance) and implicit on continuity (consistency), finiteness (convergence) and uniqueness (single valuedness) in the time domain, Kramers-Kronig (KK) integral transform (KKT) relations for immittances are derived as pure mathematical constructs in the complex frequency domain using the two-sided (bilateral) Laplace integral transform (LT) reduced to the Fourier domain for sufficiently rapid exponential decaying, bounded immittances. Novel anti KK relations are also derived to distinguish LTI (linear, time invariant) systems from non-linear, unstable and acausal systems. All relations can be used to test KK transformability on the LTI principles of linearity, stability and causality of measured and model data by Fourier transform (FT) in immittance spectroscopy (IS). Also, integral transform relations are provided to estimate (conjugate) immittances at zero and infinite frequency particularly useful to normalise data and compare data. Also, important implications for IS are presented and suggestions for consistent data analysis are made which generally apply likewise to complex valued quantities in many fields of engineering and natural sciences.
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Affiliation(s)
- T Malkow
- European Commission Directorate-General Joint Research Centre Westerduinweg 31755 LE Petten The Netherlands
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Malkow T, Papakonstantinou G, Pilenga A, Grahl-Madsen L, Tsotridis G. Immittance Data Validation using Fast Fourier Transformation (FFT) Computation - Synthetic and Experimental Examples. ChemElectroChem 2018; 4:2771-2776. [PMID: 29577006 PMCID: PMC5861679 DOI: 10.1002/celc.201700629] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Indexed: 11/09/2022]
Abstract
Exact data of an electric circuit (EC) model of RLC (resistor, inductor, capacitor) elements representing rational immittance of LTI (linear, time invariant) systems are numerically Fourier transformed to demonstrate within error bounds applicability of the Hilbert integral tranform (HT) and Kramers-Kronig (KK) integral tranform (KKT) method. Immittance spectroscopy (IS) data are validated for their HT (KKT) compliance using non-equispaced fast Fourier transformation (NFFT) computations. Failing of HT (KKT) testing may not only stem from non-compliance with causality, stability and linearity which are readily distinguished using anti HT (KKT) relations. It could also indicate violation of uniform boundedness to be overcome either by using singly or multiply subtracted KK transform (SSKK or MSKK) or by seeking KKT of the same set of data at a complementary immit- tance level. Experimental IS data of a fuel cell (FC) are also numerically HT (KKT) validated by NFFT assessing whether LTI principles are met. Figures of merit are suggested to measure success in numerical validation of IS data.
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Affiliation(s)
- T Malkow
- European Commission Directorate-General Joint Research Centre Westerduinweg 31755 LE Petten The Netherlands
| | - G Papakonstantinou
- European Commission Directorate-General Joint Research Centre Westerduinweg 31755 LE Petten The Netherlands.,Present address: Max-Planck-Institut für Dynamik komplexer technischer Systeme 39106 Magdeburg Germany
| | - A Pilenga
- European Commission Directorate-General Joint Research Centre Westerduinweg 31755 LE Petten The Netherlands
| | - L Grahl-Madsen
- EWI.I. Fuel Cells A/S Emil Neckelmannsvej 15 A&B5220 Odense SØ Denmark
| | - G Tsotridis
- European Commission Directorate-General Joint Research Centre Westerduinweg 31755 LE Petten The Netherlands
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Rasouli H, Naji L, Hosseini MG. 3D structured polypyrrole/reduced graphene oxide (PPy/rGO)-based electrode ionic soft actuators with improved actuation performance. NEW J CHEM 2018. [DOI: 10.1039/c8nj00936h] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a facile approach to fabricate 3D polypyrrole/reduced graphene oxide (PPy/rGO)-based electrodes for Nafion-based ionic soft actuators.
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Affiliation(s)
- Haleh Rasouli
- Department of Chemistry
- Amirkabir University of Technology
- Tehran
- Iran
| | - Leila Naji
- Department of Chemistry
- Amirkabir University of Technology
- Tehran
- Iran
| | - Mir Ghasem Hosseini
- Electrochemistry Research Laboratory
- Department of Physical Chemistry
- Chemistry Faculty
- University of Tabriz
- Tabriz
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Kossack W, Schulz M, Thurn-Albrecht T, Reinmuth J, Skokow V, Kremer F. Temperature-dependent IR-transition moment orientational analysis applied to thin supported films of poly-ε-caprolactone. SOFT MATTER 2017; 13:9211-9219. [PMID: 29188852 DOI: 10.1039/c7sm01988b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A novel experimental setup is described which enables one to carry out infrared transition moment orientational analysis (IR-TMOA) depending on temperature. By this, three dimensional molecular order parameter tensors of IR-active transition dipole moments with respect to the sample coordinate system can be determined in their thermal evolution (35 °C < T < 59 °C). As an example crystallinity and macroscopic order of poly-ε-caprolcatone are monitored. Both remain largely unaltered up to T ∼ 50 °C, above which they decrease. These reductions are explained as the melting of flat-on crystalline lamellae that make up about 34% of the crystalline material. The remaining crystallites are arranged into bulk-like, confined spherulitic structures and do not melt by more than (3 ± 3)%. Therefore, flat-on oriented lamellae are supposed to be kinetically favored by confinement during melt crystallization but are thermodynamically less stable than two-dimensionally confined bulk-like spherulites.
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Affiliation(s)
- Wilhelm Kossack
- Molecular Physics department, Peter Debye Institut für weiche Materie, University Leipzig, Linnéstraße 5, 04103 Leipzig, Germany.
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Kossack W, Seidlitz A, Thurn-Albrecht T, Kremer F. Molecular Order in Cold Drawn, Strain-Recrystallized Poly(ε-caprolactone). Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02714] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wilhelm Kossack
- Fakultät
für Physik und Geowissenschaften, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
| | - Anne Seidlitz
- Institut
für Physik, FG Experimentelle Polymerphysik, Martin-Luther-Universität Halle-Wittenberg, 06120 Halle/Saale, Germany
| | - Thomas Thurn-Albrecht
- Institut
für Physik, FG Experimentelle Polymerphysik, Martin-Luther-Universität Halle-Wittenberg, 06120 Halle/Saale, Germany
| | - Friedrich Kremer
- Fakultät
für Physik und Geowissenschaften, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
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11
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Konevskikh T, Lukacs R, Blümel R, Ponossov A, Kohler A. Mie scatter corrections in single cell infrared microspectroscopy. Faraday Discuss 2016; 187:235-57. [DOI: 10.1039/c5fd00171d] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Strong Mie scattering signatures hamper the chemical interpretation and multivariate analysis of the infrared microscopy spectra of single cells and tissues. During recent years, several numerical Mie scatter correction algorithms for the infrared spectroscopy of single cells have been published. In the paper at hand, we critically reviewed existing algorithms for the correction of Mie scattering and suggest improvements. We developed an iterative algorithm based on Extended Multiplicative Scatter Correction (EMSC), for the retrieval of pure absorbance spectra from highly distorted infrared spectra of single cells. The new algorithm uses the van de Hulst approximation formula for the extinction efficiency employing a complex refractive index. The iterative algorithm involves the establishment of an EMSC meta-model. While existing iterative algorithms for the correction of resonant Mie scattering employ three independent parameters for establishing a meta-model, we could decrease the number of parameters from three to two independent parameters, which reduced the calculation time for the Mie scattering curves for the iterative EMSC meta-model by a factor of 10. Moreover, by employing the Hilbert transform for evaluating the Kramers–Kronig relations based on a FFT algorithm in Matlab, we further improved the speed of the algorithm by a factor of 100. For testing the algorithm we simulate distorted apparent absorbance spectra by utilizing the exact theory for the scattering of infrared light at absorbing spheres, taking into account the high numerical aperture of infrared microscopes employed for the analysis of single cells and tissues. In addition, the algorithm was applied to measured absorbance spectra of single lung cancer cells.
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Affiliation(s)
- Tatiana Konevskikh
- Department of Mathematical Sciences and Technology (IMT)
- Norwegian University of Life Sciences
- 1430 Ås
- Norway
| | - Rozalia Lukacs
- Department of Mathematical Sciences and Technology (IMT)
- Norwegian University of Life Sciences
- 1430 Ås
- Norway
| | | | - Arkadi Ponossov
- Department of Mathematical Sciences and Technology (IMT)
- Norwegian University of Life Sciences
- 1430 Ås
- Norway
| | - Achim Kohler
- Department of Mathematical Sciences and Technology (IMT)
- Norwegian University of Life Sciences
- 1430 Ås
- Norway
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Suter M, Quack M. Line shape of amplitude or frequency-modulated spectral profiles including resonator distortions. APPLIED OPTICS 2015; 54:4417-4431. [PMID: 25967497 DOI: 10.1364/ao.54.004417] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 04/07/2015] [Indexed: 06/04/2023]
Abstract
We report experiments and an improved method of analysis for any harmonics of frequency-modulated spectral line shapes allowing for very precise determinations of the resonance frequency of single absorption lines for gigahertz spectroscopy in the gas phase. Resonator perturbations are implemented into the formalism of modulation spectroscopy by means of a full complex transmission function being able to model the asymmetrically distorted absorption line shapes for arbitrary modulation depths, modulation frequencies, and resonator reflectivities. Exact equations of the in-phase and the quadrature modulation signal, taking into account a full resonator transmission function, are simultaneously adjusted to two-channel lock-in measurements performed in the gigahertz regime to obtain the spectral line position. The determination of the absorption line position of the rotational transition J' = 7 ← J" = 6 of (16)O(12)C(32)S in the vibrational ground state is investigated while changing the resonator distortions. The results are subjected to the approach proposed here and compared to standard methods known from the literature.
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Watts B. Calculation of the Kramers-Kronig transform of X-ray spectra by a piecewise Laurent polynomial method. OPTICS EXPRESS 2014; 22:23628-23639. [PMID: 25321829 DOI: 10.1364/oe.22.023628] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
An algorithm is presented for the calculation of the Kramers-Kronig transform of a spectrum via a piecewise Laurent polynomial method. This algorithm is demonstrated to be highly accurate, while also being computationally efficient. The algorithm places no requirements on data point spacing and is capable of integrating across the full spectrum (i.e. from zero to infinity). Further, we present a computer application designed to aid in calculating the Kramers-Kronig transform on near-edge experimental X-ray absorption spectra (extended with atomic scattering factor data) in order to produce the dispersive part of the X-ray refractive index, including near-edge features.
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Watts B, Swaraj S, Nordlund D, Lüning J, Ade H. Calibrated NEXAFS spectra of common conjugated polymers. J Chem Phys 2011; 134:024702. [PMID: 21241141 DOI: 10.1063/1.3506636] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Near edge x-ray absorption fine structure (NEXAFS) spectroscopy has evolved into a powerful characterization tool for polymeric materials and is increasingly being used to elucidate composition and orientation in thin films of relevance to organic electronic devices. For accurate quantitative compositional analysis, insight into the electronic structure and the ability to assess molecular orientation, reliable reference spectra with known energy resolution and calibrated energy scale are required. We report a set of such NEXAFS spectra from 23 semiconducting polymers and some related materials that are frequently used in organic device research.
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Affiliation(s)
- B Watts
- North Carolina State University, Raleigh, North Carolina 27695, USA.
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15
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Influence of bis-(2-benzothiazolyl)-disulfide on corrosion inhibition of mild steel in hydrochloric acid media. J Solid State Electrochem 2010. [DOI: 10.1007/s10008-010-1162-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wang XM, Hu JM, Zhang JQ, Cao CN. Characterization of surface fouling of Ti/IrO2 electrodes in 4-chlorophenol aqueous solutions by electrochemical impedance spectroscopy. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2007.11.070] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Meneses DDS, Rousseau B, Echegut P, Matzen G. Piecewise polynomial dielectric function model and its application for the retrieval of optical functions. APPLIED SPECTROSCOPY 2007; 61:644-8. [PMID: 17650377 DOI: 10.1366/000370207781269710] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A new expression of dielectric function model based on piecewise polynomials is introduced. Its association with spline and more recent shape preserving interpolation algorithms allows easy reproduction of every kind of experimental spectra and thus retrieval of all the linear optical functions of a material. Based on a pure mathematical framework, the expression of the model is always applicable and does not necessitate any knowledge of the microscopic mechanisms of absorption responsible for the optical response. The potential of piecewise polynomial dielectric functions is shown through synthetic examples and the analysis of experimental spectra.
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