قارن الطرق
راجع الطرق التي اخترتها جنبًا إلى جنب؛ الصفوف المختلفة مميَّزة.
| التحسين الطيفي للرامان السطحي (SERS)× | مطيافية الأشعة تحت الحمراء ذات الانعكاس الكلي الموهن (ATR-FTIR)× | الدايكروازيّم الدائري× | |
|---|---|---|---|
| المجال | علم الطيف | علم الطيف | علم الطيف |
| العائلة | Process / pipeline | Process / pipeline | Process / pipeline |
| سنة النشأة≠ | 1974 | 1961 | 1969 |
| صاحب الطريقة≠ | Martin Fleischmann | Joop Fahrenfort | Jean-Claude Fasman |
| النوع≠ | Vibrational spectroscopy technique | Vibrational spectroscopy technique | Spectroscopic method |
| المصدر التأسيسي≠ | 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 ↗ |
| الأسماء البديلة≠ | Surface-enhanced Raman scattering, SERS spectroscopy | ATR-IR, attenuated total reflectance, FTIR spectroscopy | CD spectroscopy, circular dichroism, CD analysis |
| ذات صلة | 3 | 3 | 3 |
| الملخص≠ | 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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