Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment -...
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Transcript of Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment -...
![Page 1: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/1.jpg)
Fluorescence Fluorescence Correlation Correlation SpectroscopySpectroscopy
물리학과물리학과 // 바이오융합기술바이오융합기술바이오융합기술프로젝트바이오융합기술프로젝트 II
20050818 20050818 차선철 차선철 [email protected]@sogang.ac.krkr
![Page 2: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/2.jpg)
Contents
1.What is FCS?
2.Setup
3.Base Theories
4.What’s FCS used for?
5.Example Experiment - Diffusion
6.Another Example
7.Summary
![Page 3: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/3.jpg)
1. What is FCS ?
FCS is
Fluorescence/Fluctuation Correlation Spectroscopy
FCS is
Suggested 1972, and Renaissance 1990s
FCS is
Calculate correlation function from time dependant intensity fluctuation of dye molecule by confocal microscopy in single molecule level.
![Page 4: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/4.jpg)
2. Setup
![Page 5: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/5.jpg)
3. Based Theories – Gaussian Beam
Sample
Dichroic Mirror
Lens
laser : λ1
By Uncertainty Principle
Focal Volume
![Page 6: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/6.jpg)
3. Based Theories – Fluorescence
Fluorescence light : λ2
Molecules are Fluorescent
λ2
λ1
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3. Based Theories – Confocal MicroscopyO.M Resolution limit ~ 200nm
But we want to see single molecule!
-> Confocal Microscopy
![Page 8: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/8.jpg)
3. Based Theories – Correlation Function
Time lag (τ)
![Page 9: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/9.jpg)
4. What’s FCS used for ?
From Correlation Function, seeing
Chemical Dynamics,
Intra-molecular /
Inter-molecular
Dynamics,
Diffusion,
E T C…
This Expt.
Study Region
![Page 10: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/10.jpg)
5. Example Experiment - Diffusion
Why does the diffusion create?
-> Brownian Motion !
![Page 11: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/11.jpg)
5. Example Experiment - Diffusion
Changing concentration
-> Changed Correlation Function
CG
1~)(
Be used only Concentration ~ few nM
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5. Example Experiment - Diffusion
0 2 4 6 8 100
5
10
15
20
25
30
35
1/G(0
)
Concentration (nM)
inverted g(0)
1E-5 1E-4 1E-3 0.01 0.10.0
0.2
0.4
0.6
0.8
1.0
Nor
mal
ized
Auto
corr
elat
ion
funt
ion.
Lag time (τ )
200pM (norm) 500pM (norm) 1nM (norm) 2nM (norm) 5nM (norm) 10nM (norm)
1E-5 1E-4 1E-3 0.01 0.11.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
Auto
corr
elat
ion
func
tion.
Lag time (τ )
TMR (200pM) TMR (500pM) TMR (1nM) TMR (2nM) TMR (5nM) TMR (10nM)
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6. Another Example - Chemical Reaction
![Page 14: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/14.jpg)
7. Summary
We know theory of FCS
: Uncertainty Principle – Gaussian Beam
: Quantum Mechanics – Fluorescence
: Geometric Optics – Confocal Microscopy
: Statistical Mechanics – Correlation function
We use FCS
Study Brownian Motion – Diffusion
![Page 15: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/15.jpg)
ReferenceP.Schwile and E.Haustein, Fluorescence Correlation Spectroscopy
S.H.Kim, Fluorescence Correlation Spectroscopy
Y.H.Hwang Spectroscopy : Characterization of Material Properties
C.Gell, et al. Handbook of Single Molecule Fluorescence Correlation Spectroscopy
S.Weiss, Fluorescence Spectroscopy of Single Biomolecules
F.Reif, Fundamentals of Statistical and Thermal physics 4th edition
Saleh&Hahaa, Fundamentals of Photonics 4th edition
PerkinElmer, Avalanche Photodiode A User Guide
Hamamatsu, Photomultiplier tubes Basic and Applicaitions
RP Photonics www.rp-photonics.com
Nikon Microscopy www.microscopyu.com
Mek&Tosj www.mekentosh.com
Brownian Motion java animation
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Supplement – Brownian Motion FormulaMolecule Fluctuation Equation of motion : Langevin EquationMolecule Fluctuation Equation of motion : Langevin Equation
)(int tFvFdt
dvm ext
)]1([2 12 tetkT
x
Use it -> Given Stokes-Einstein relation Use it -> Given Stokes-Einstein relation
R
kTD
6Diffusion coefficientDiffusion coefficient
qIn
dVtrCqrSrItF ex
00
)),(()()()(IntensityIntensity
![Page 17: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/17.jpg)
Supplement – Correlation function formula
2A
AA 0
2A
A
tAtdtA
TAA
T
T 0
1lim0
''1
lim00
rrArdrAR
rAAR
R
tBtdtA
TBA
T
T 0
1lim0
Auto correlation functionAuto correlation function
Cross correlation functionCross correlation function
''1
lim00
rrBrdrAR
rBAR
R
DD w
rCBG
2
0
0eff)(1
1
)1(
1
V
1)(
D
r
wrV
D
eff
4
20
020
23
We use Autocorrelation Function (bottom)We use Autocorrelation Function (bottom)
![Page 18: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/18.jpg)
Supplement – Photon Counter
Counting A Few Photon
PMT
Photomultiplier tube
APD
Avalanche Photodiode
![Page 19: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/19.jpg)
Supplement – FRET
: Fluorescence Resonance Energy Transfer
![Page 20: Contents 1.What is FCS? 2.Setup 3.Base Theories 4.What’s FCS used for? 5.Example Experiment - Diffusion 6.Another Example 7.Summary.](https://reader036.fdocuments.net/reader036/viewer/2022081603/56649f525503460f94c75c47/html5/thumbnails/20.jpg)
Supplement – Student’s DATA