Using coherent X-rays to probe dynamical properties of ... · Magmas are mainly silicate melts....
Transcript of Using coherent X-rays to probe dynamical properties of ... · Magmas are mainly silicate melts....
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Using coherent X-rays to probe dynamical properties of materials at
ESRF-EBS
Beatrice Ruta
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Coherence applications at ID10
Measurements of speckles correlations in complex systems …
X-ray Photon Correlation Spectroscopy (XPCS): temporal correlations Dynamics
X-ray Cross Correlation Analysis (XCCA): spatial correlations Structure
Wochner et al. PNAS (2009)
Coherent X-ray Diffraction Imaging (CXDI): 2D & 3D reconstructions
… and imaging of biological systems
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X-ray Photon Correlation Spectroscopy (XPCS)
(DLS)
XPCS allows to measure slow relaxation processes in complex systems
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XPCS uses the partial coherent properties of X-rays in 3rd generation synchrotrons
F. van der Veen & F. Pfeiffer, J. Phys. Cond. Mat. 1998
X-ray Photon Correlation Spectroscopy (XPCS)
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Coherent Radiation
The intensity fluctuations are related to the constructive and
destructive interference between the two waves
http://micro.magnet.fsu.edu/primer/java/interference/doubleslit/
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The intensity of the speckles is related tothe exact spatial arrangement of thescatters inside the system
2
)()(),(
n
triQ
nneQftQI
X-Ray Photon Correlation Spectroscopy
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The intensity of the speckles is related tothe exact spatial arrangement of thescatters inside the system
2
)()(),(
n
triQ
nneQftQI
Information on the dynamics can be obtained by measuring a series ofspeckles patterns and quantifying temporal correlations of intensityfluctuations at a given wave-vector q
2
2 2
( ,0) ( , )( , ) 1 ( ) ( , )
( )
I Q I Q tg Q t A Q F Q t
I Q
A. Madsen, A. Fluerasu and B. Ruta, Springer, 2015
X-Ray Photon Correlation Spectroscopy
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Information on the relaxation dynamics can be obtained from the decay of the intermediate scattering function on a scale 2π/Q
(0) ( )( , )(Q,t)
( ) (0) (0)
Q Q
Q Q
tS Q tF
S Q
0.1 1 10 100 1,0000.0
0.2
0.4
0.6
f(q
,t)
time (s)
2π/Q
τ
tatqf exp),(
The intermediate scattering function
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tatqf exp),(
0.1 1 10 100 1,0000.0
0.2
0.4
0.6
f(q,t
)
time (s)
Information on the relaxation dynamics can be obtained from the decay of the intermediate scattering function on a scale 2π/Q
(0) ( )( , )(Q,t)
( ) (0) (0)
Q Q
Q Q
tS Q tF
S Q
2π/Q
τ
τ: time necessary for structuralrearrangement of the particles.
The intermediate scattering function
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Scientific activity with XPCS at ID10
XPCS: (saxs, waxs, gi-xpcs)
• Supercooled liquids and glasses
• Soft materials (gels, colloids, …)
• Fluctuations at ordering phase transitions
• Driven dynamics by external fields T, E, B
• Interface dynamics in soft matter systems
• Atomic diffusion in alloys
• …
Energy range: 7,8,10 & 21 keV
Time resolution [2D det.]: ≈ ms - 104 s
Probed length scales: 8·10-4 - 3 Å-1
SAXS XPCS
GI-XPCS
Y. Chushkin F. Zontone
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Relaxation processes in colloidal suspensions
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Dispersed in water Laponite originates a charged colloidal suspension of disks ofnanometric size with inhomogeneous charge distribution
2R = (25 ± 2) nm
2H = (0.9 ± 0.1) nm
0 1 2 3
102
103
104
105
t w(h
ours
)
Concentration (%)
Phase
Separation
C=0.3%a) C=3.0%c)C=1.5%b)
EquilibriumGel
Wigner Glass
DHOC Glass
Group of B. Ruzicka & R. Angelini:Phys. Rev. E 77, 020402 (2008)
Phys. Rev. Lett. 104, 085701 (2010)
Nature Mat. 10, 56 (2011)
Nature Commun. 5, 4049(2015)
Colloidal suspensions of Laponite
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Dispersed in water Laponite originates a charged colloidal suspension of disks ofnanometric size with inhomogeneous charge distribution
2R = (25 ± 2) nm
2H = (0.9 ± 0.1) nm
0 1 2 3
102
103
104
105
t w(h
ours
)
Concentration (%)
Phase
Separation
C=0.3%a) C=3.0%c)C=1.5%b)
EquilibriumGel
Wigner Glass
DHOC Glass
Group of B. Ruzicka & R. Angelini:Phys. Rev. E 77, 020402 (2008)
Phys. Rev. Lett. 104, 085701 (2010)
Nature Mat. 10, 56 (2011)
Nature Commun. 5, 4049(2015)
Colloidal suspensions of Laponite
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tw waiting time
0.0
0.2
0.4
0.6
0.8
1.0microscopic relaxation
f(q
,t)
log(t)
structural relaxation
(rattling in the cage)
(cage changes)
τ2 structural relaxation time related to astructural rearrangement of the particles.
fast relaxation
slow relaxation
τ1 microscopic relaxation time related to theinteractions between a particle and the cage ofits nearest neighbors.
The slow down of the dynamics toward an arrested state corresponds to a continuous shift of the decay time toward longer time scales and the emerging of different relaxation processes.
Relaxation dynamics
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Multi-scales and techniques approach:Dynamic Light Scattering early aging regime τ1& τ 2 (Q [6.2 x 10-4 - 2.1 x 10-3] Å-1)
Neutron Spin Echo early & full aging regime τ1 (Q [1.3 x 10-2 - 1.3 x 10-1] Å-1 )
X-ray Photon Correlation Spectroscopy full aging regime τ2 (Q [3.1 x 10-3- 2.2 x 10-1] Å-1 )
Molecular Dynamics early & full aging regime τ1& τ 2 (around the structure factor peak)
0.0
0.2
0.4
0.6
0.8
1.0microscopic relaxation
f(q
,t)
log(t)
structural relaxation
(rattling in the cage)
(cage changes)
tw waiting timeDLS
NSE
XPCS
MD
Early aging regimeFull-aging regime
Colloidal suspensions of Laponite in D2O
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Early aging regimeDynamic Light Scattering
21
2 11t
exp)a(t
expa),Q(g )(
Diffusive dynamics of both themicroscopic and the structuralrelaxation time
τ1 ≈ Q-2
stationary
Cw=3.0 % in D2O at different waiting time andfor Q [6.2 x 10-4 -2.1 x 10-3 ] Å-1
τ2 ≈ Q-2 & β<1aging
F. A. Melo Marques/B. Ruta et al. Soft Matter, 2015
Colloidal suspensions of Laponite in D2O
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τ2 ≈ Q-1
β<1
Full-aging regimeXPCS
Cw=3.0 % in D2O at different waiting timeand for Q [3.1 x 10-3-2.2 x 10-1] Å-1 (glasstransition at tw≈600 min)
2
2
)2( exp1),(
tbtQg
Kohlrausch-Williams-Watts (KWW)
Discontinuous hoppingof caged particles
F. A. Melo Marques/B. Ruta et al. Soft Matter, 2015
Colloidal suspensions of Laponite in D2O
Agreement with MD simulations
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Nanoscopic dynamics in biominerals
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Nanoscopic dynamics of amorphous calcium carbonate (ACC)
Mg-doped ACC reveal agingphenomena concomitant todehydration of the structure
Ca1-xMgxCO3·nH2O (x=0 - ACC, x=1 - AMC)
A. Koishi/B. Ruta/A. Fernandez Martinez (in preparation)
Study of the effect of different additives on the control of the
crystallization kinetics
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Nanoscopic dynamics of amorphous calcium carbonate (ACC)
The presence of Mg2+
Increases the frequency forstructural rearrangements)
XPCS + neutrons (IINS) Mg2+ acts as stabilizer against
crystallization
A. Koishi/B. Ruta/A. Fernandez Martinez (in preparation)
Ca1-xMgxCO3·nH2O (x=0 - ACC, x=1 - AMC)
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The Extremely Brilliant Source upgrade
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Main parameters for XPCS
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XPCS at ESRF - EBS
EBS will break new ground for XPCS
• Up to 10.000 times faster time scales
• Up to 100 times larger signal to noise ratio
• Extension into hard x-rays beyond 10 keV
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Adapted from O. Shpyrko J. Synch, Rad. 2014
τmin ≈ 100 ns (now only ≈ ms)
Energy: 6.5 - 35 keV(now at 8 keV)
XPCS at ESRF-EBS
XPCS at ESRF - EBS
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Dynamics in biological & soft systems
® Pierre Gilles De Gennes
Fast dynamics + High Energy(≈100ns-1s)
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Ex. Lipid bilayers in presence of nanoparticles (with different philicity): incorporation of hydrophobic nanoparticles, membrane deformations…
[Nano Lett. 2010 10 3733]
Dynamics in biological & soft systems
® Pierre Gilles De Gennes
Fast dynamics + High Energy(≈100ns-1s)
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• Dynamical & spatial heterogeneity are ubiquitous in nature
– Supercooled liquids and glasses
– Domain fluctuations and avalanches in high-Tc superconductors and magnetic systems
– Polymers and biomaterials
Dynamical (left) and spatial (right) heterogeneity in simulations of 2D glass transitions
J.P. Garrahan, PNAS (2011) H. Tanaka et al. Nat. Mat. 2010
ESRF - EBS:1. Dynamics from (sub-)µs to s
2. Length scales: from single particles to particle clusters
3. Structure-dynamics correlationsby combined XPCS and XCCA
Intermittent correlations
Courtesy of F. Lehmkühler, Desy, Hamburg, Germany
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Soft matter in „natural“ environments
• Most soft materials are water-based (particles dispersed in water):
– (bio-)macromolecules, polymers, gels, colloids, membranes, …
• Typically nanometer dimensions → (sub-)microseconds time scales
Unaccessible by state-of-the-art XPCS – two approaches to overcome limitations
Solvent exchange: glycerol
Grey area: accessible time range in current XPCS
Changed sample systems: no access to solvent-particle interactions in the „real“ environment
Microrheology: use of tracer particles
Indirect access to solvent properties only
Courtesy of F. Lehmkühler, Desy, Hamburg, Germany
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Biomineralization processes
Courtesy of A. Fernandez Martinez, IST - Terre, Grenoble
Multi-step, non-classical nucleation pathways involving amorphous precursors occurs in a wide variety of biological and engineered
systems: phosphates, carbonates, sulphates, iron oxides…
XPCS at EBS can provide unique information on the ‘frequency of structural re-organization’, which is directly involved in the kinetic pre-factor of the kinetic barrier to nucleation.
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P. Gallo et al. Chem. Rev. 2016
Mischima et al. Nature 1985
Hierarchical densifications in metallic glasses
Q. Luo et al. Nat. Commun. 2015
H. W. Sheng et al. Nat. Materials 2007
Dynamics at Extreme Conditions
Dynamical evolutions duringpolyamorphic transitions
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Volcanos are among the most productive
glassmakers on Earth.
Magmas are mainly silicate melts.
Nucleation in magmas
Courtesy of M. Zanatta, Padova University, Italy
Crystallization in magmas strongly affects
viscosity, and thus magma flow.
Determining the microscopic mechanism
of crystallization can lead to an a priori
assessment of the volcanic risk.
Atomicdynamics?
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High incident energy
Improved brillance
XPCS can clarify the microscopic atomic dynamics in crystallizing magmas
High temperature studies (HT, about 1000°C).
Edge selective XPCS , sensitivity to impurities.
High pressure studies (HP, about 3-4 kbar).
Realistic conditions (HT-HP, chaotic mixing,…).
Nucleation in magmas
Courtesy of M. Zanatta, Padova University, Italy
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• protein dynamics in living cells• dynamics under confinement• dynamics of polymers, macromolecules, membranes, foams, …• dynamics at buried interfaces• polyamorphism (LL/GG phase transitions)• dynamics at extreme conditions
® Pierre Gilles De Gennes
It’s time to think…
XPCS at ESRF- EBS will have the world leading position
with unique outstanding properties for many years!!!
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EoI from the European User Community
40 authors:
• 26 different institutes
• 6 countries: Germany, France, Italy, Sweden, Netherlands, Spain
Submitted on February 2016
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EBS workshop CDR #1
48 participants:
• 30 different institutes
• 9 countries: Germany, France, Italy, England, Sweden, Slovakia,
Russia, Japan, United States
December 2016
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Coherence: a key feature of the EBS upgrade
30x at 8keV
ESRF Orange Book
The Extremely Brilliant Source upgrade
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Molecular dynamics simulations show intermittent dynamics at sub-micron scales in lipid membranes (time scale below 10 microseconds) depending on the «crowding» of the film
Top: protein poor membraneBottom: protein rich membrane
t=0ns 10ns 100ns 1000ns
In the crowded environment, faster dynamics (red) is observed.
(scales in nm)
Dynamics in model membranes
Courtesy of L. Cristofolini, University of Parma - Italy