[재료공학, 생체재료]Raman spectroscopy

소개글

Raman spectroscopy 발표자료

목차

Raman effect
Raman scattering
Vibrational motion
Physics of Rayleigh scattering
SRS & CARS
Raman Theory
Raman scattering cross-section
Raman Shift
Raman experimental setup
Raman microspectroscopy
Raman detector
Raman 분광법의 장점과 단점
IR vs Raman
IR vs Raman in spectrum
How Do Raman and Infrared Differ?

본문내용

Raman effect

Brillouin(1922), Smekal(1923) → Raman(1928)
Spontaneous Raman scattering

Scattering signal : spectrum containing information on intensity and distribution of vibration and rotation states of species

Inelastic scattering
Stokes Raman: λRaman > λo
Anti-Stokes Raman : λRaman < λo

Density, Concentration, temperature from scattering signal


Physics of Raman scattering

Polarizability (α) depends on molecular structure
Molecule vibration (and rotation) causes their structure, and
therefore their polarizability, to change with time
– αv = α0 + α1 cos ωvt
Resulting dipole oscillation
– P
Induced dipole has three frequency & emits dipole radiation
– ω : Rayleigh scattering
– ω0 – ωv : Stokes vibrational Raman scattering
– ω0 + ωv : anti-Stokes vibrational Raman scatterin

참고 자료

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