مقایسهٔ روشها
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| SERS× | طیفسنجی فروسرخ تبدیل فوریه بازتاب کل تعدیلشده (ATR-FTIR)× | پراکنش دورانی (Circular Dichroism)× | |
|---|---|---|---|
| حوزه | طیفسنجی | طیفسنجی | طیفسنجی |
| خانواده | Process / pipeline | Process / pipeline | Process / pipeline |
| سال پیدایش≠ | 1974 | 1961 | 1969 |
| پدیدآور≠ | Martin Fleischmann | Joop Fahrenfort | Jean-Claude Fasman |
| نوع≠ | Vibrational spectroscopy technique | Vibrational spectroscopy technique | Spectroscopic method |
| منبع بنیادین≠ | Fleischmann, M., Hendra, P. J., & McQuillan, A. J. (1974). Raman spectra of pyridine adsorbed at a silver electrode. Chemical Physics Letters, 26(2), 163-166. DOI ↗ | Harrick, N. J. (1960). Study of physics of internal reflection from metals. Journal of Physics and Chemistry of Solids, 13(2), 143-155. link ↗ | Greenfield, N. J., & Fasman, G. D. (1969). Computed circular dichroism spectra for protein secondary structures. Biochemistry, 8(10), 4108-4116. DOI ↗ |
| نامهای دیگر≠ | Surface-enhanced Raman scattering, SERS spectroscopy | ATR-IR, attenuated total reflectance, FTIR spectroscopy | CD spectroscopy, circular dichroism, CD analysis |
| مرتبط | 3 | 3 | 3 |
| خلاصه≠ | Surface-Enhanced Raman Spectroscopy (SERS) amplifies weak Raman signals by many orders of magnitude when analyte molecules are adsorbed on specially prepared metal (typically silver or gold) nanostructured surfaces. Discovered by Fleischmann, Hendra, and McQuillan in 1974, SERS enables detection of vibrational signatures of single molecules and ultra-trace contaminants, revolutionizing analytical chemistry and forensics. | Attenuated Total Reflectance (ATR) Fourier Transform Infrared (FTIR) spectroscopy is a variant of conventional FTIR that measures infrared absorption through evanescent-wave interrogation of samples in direct contact with a high-refractive-index crystal. Developed by Harrick and Fahrenfort in the 1960s, ATR-FTIR is now the dominant form of FTIR spectroscopy, enabling rapid, non-destructive characterization of organic compounds, polymers, coatings, and biological materials without extensive sample preparation. | Circular Dichroism (CD) spectroscopy measures the differential absorption of left- and right-circularly polarized light by optically active molecules, particularly proteins and nucleic acids. Introduced by Greenfield and Fasman in 1969, CD is a rapid, non-destructive technique for characterizing secondary structure (alpha-helix, beta-sheet), monitoring protein folding transitions, and assessing conformational changes in response to pH, temperature, or ligand binding. |
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