State of the art X-ray fluorescence imaging facilities · 2018. 2. 16. · XFM: Aquatic Ecosystems...
Transcript of State of the art X-ray fluorescence imaging facilities · 2018. 2. 16. · XFM: Aquatic Ecosystems...
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synchrotron.org.au
State of the art X-ray
fluorescence imaging facilitiesLINXS Workshop on X-ray Fluorescence imaging:How to plan and execute the perfect experiment
David Paterson
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synchrotron.org.au
Fast X-ray fluorescence microscopy
2
1 Gigapixel image 40×9 mm = 66667×15000 (600 nm) pixels, 133 µsec, raw data 250 GB, 38 hrs. Petrographic section high grade ore, Sunrise Dam gold deposit, WA. Fisher et al., Miner. Deposita 50, 665-674 (2015).
Sr:Fe:Rb
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synchrotron.org.au
• Major (mainly) hard X-ray facilities
• Ptychography for super resolution
X-ray Fluorescence Microscopy
• Macro large objects fast, high sensitivity
• Micro microprobes, versatile, in-situ environments
• Nano nanoprobes, ultimate resolution <10 nmResolution
• Tomography
• Chemical speciation XAS
• XANES imaging
3D
Energy range
• Specialised environments and cells
• Cryostream
• Frozen hydrated
In situ
Cryo
State of the art X-ray fluorescence imaging
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synchrotron.org.au
Selenium toxicity in aquatic environments
Zn Se S
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synchrotron.org.au
Eye lensIris Brain
Liver
Gallbladder
Lung
Gut interior
Notochord
Tadpole exposed to SeIV (30 µg/L) for 7 days
Zinc
SeleniumSulphur
XFM: Aquatic Ecosystems Selenium
Bioaccumulation on the Micron Scale
Chantal Lanctôt (Griffith University),
Tom Cresswell (Environmental Research
ANSTO) et al.
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synchrotron.org.au
State of the art XFM facilities
• ESRF ID21*, ID16A*, ID16B
• PETRAIII P.06* microprobe and nanoprobe
• Diamond ID14 nanoprobe, ID18 microprobe
• Soleil Nanoscopium
• APS 2ID, 26ID 13IDE, Bionanoprobe*
• NSLSII HXN, SRX
• AS XFM*
• Asia Japan, China, South Korea, Taiwan
• MAXIV Up next!
• Elletra TwinMic
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synchrotron.org.au
ID21 ESRF
• Sulfur mapping and speciation
• Volcanically-induced drainage of
divalent iron-rich waters during
the Last Glacial Maximum
significantly contributed to the
global carbon cycle. Evidence
provided by micro X-ray
fluorescence and XANES
coupled to petrographic,
geochemical and DNA studies
of subglacial calcites from the
East Antarctic Ice.
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synchrotron.org.au
ID16 - Nanoprobes ESRF
• ID16A - Nano-imaging
• ID16B - Nano-analysis
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synchrotron.org.au
APS
Biological samples (primarily)
• 2-ID-D sub-micron fluorescence, XANES and
ptychography
• 2-ID-E well automated high throughput
Hard materials (mainly)
• 26-ID nanoprobe
GeoSoilEnviroCARS best geology
• 13 IDE
– Compositional analysis and mapping ~ 2-28 keV.
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synchrotron.org.au
Micro/Nano-Probe P06 at PETRA III
Micro/nanoscopic spatial resolution with XRF, XAS and XRD.
Ptychographic schemes => increased spatial resolution to
low nm range
Maia detector on microprobe
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synchrotron.org.au
HXN, SRX at NSLS-II
• Hard X-ray Nanoprobe (HXN) 3-ID structural
and X-ray fluorescence imaging.
– hard X-ray imaging of structure, elements, strain
and chemical states with spatial resolution
ranging from 10 to 30 nm
• Primarily materials research.
• Multilayer Laue Lenses (MLLs)
– spot size of 8.4 nm by 6.8 nm
Saša Bajt et al.;
Light: Science and Applications,
2017; DOI: 10.1038/lsa.201
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synchrotron.org.au
Submicron Resolution X-ray Spectroscopy SRX
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synchrotron.org.au
Bionanoprobe APS
Subcellular imaging, frozen hydrated
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synchrotron.org.au
X-ray Fluorescence Microscopy AS
Energy range: 4 to 25 keV
• Hard x-ray microprobe ΔE/E ~10-4
• X-ray fluorescence mapping (µ-XRF)
• X-ray fluorescence µ-XANES => XANES imaging
Only hard X-ray microprobe servicing Australasia
Martin de Jonge (Physicist)
• biological, biomedical and life science, tomography
Daryl Howard (Chemist)
• cultural heritage, forensic and mm-scale investigations
Cameron Kewish: AS fellow (Physicist)• XFM + ptychography
Juliane Reinhardt: AS fellow (Physicist)• XFM + ptychography with chemical contrast
David Paterson (Physicist)
• environmental and geological science
Probe Resolution Field of View H X V
KB Microprobe 1 µm 150 X 100 mm
Milliprobe 50 µm 600 X 1200 mm
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synchrotron.org.au
Macro scale XRF Imaging
Fred McCubbin “North Wind”
mercury: arsenic :iron
Hg: As: Fe
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synchrotron.org.au
Megapixels/hour:
bio-fortification of cereal grains
ZincIronManganese
10 keV incident
PotassiumCopperCalcium
Lombi et al.J. Exp. Botany 62, 273 (2011).
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synchrotron.org.au
Enzo Lombi, et al. Journal of Experimental Botany 62, 273 (2011).
“Megapixel imaging of micronutrients in mature barley grains.”
High definition analysis of elemental correlations
a
cb
Background
20
40
60
80
Zn-C
u f
req
uency
0.01 0.1 1 10 100
Cu (mg/kg)
0.01
0.1
1
10
Zn
(mg
/kg
)
a
b
c
100
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synchrotron.org.au
99
High-definition fast fluorescence tomography
= 2 µm, = 2 ms
2291 pixels, 2001 projections (4.6 Mpix).
3 hrs meas time
Rice grain with husk,
Compton
Ge
Zn
600 µm
10 µm
Compton
Ge
Zn
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synchrotron.org.au
Wheat roots exposed
2 µM As(V) ca. 24 hrA. Light micrograph taken
after completion of the
XANES imaging
B. Elemental map showing
total As distribution after
the XANES imaging.
C. Spatial distribution of
pixel-populations
identified by comparing
energy intensities.
D. Concentrations of
uncomplexed As(V) and
As(III)-thiol complexes in
the transect = red
rectangle in B.
Detailed XANES analysis in hydrated roots
Kopittke et al. New Phytologist 201, 1251-1262 (2014).
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synchrotron.org.au
Normalized As Kα-edge XANES
Energy (keV)
11860 11865 11870 11875 11880 11885 11890
Deriva
tive o
f no
rmaliz
ed x
µ(E
)
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
(i) Wheat As(V) - Outer
As(III)
As(III)-GSH
Energy (keV)
11.86 11.87 11.88 11.89 11.90
Norm
aliz
ed x
µ(E
)
As(III)-GSH
As(III)
As(V)-DMA
As(V)
[i] Wheat As(V) - Outer
[ii] Wheat As(V) - Inner
[iii] Wheat As(III)
[iv] Rice As(V) - Outer
[v] Rice As(V) - Inner
[vi] Rice As(III)
Wheat As(V) - Plaque
(i) Wheat As(V) – Outer
4 standards whitelines: As(V); As(V)-DMA; As(III); As(III)-GSH.
Kopittke et al., Laterally-resolved speciation of arsenic in roots of wheat and rice using fluorescence-XANES imaging, New Phytologist 201, 1251-1262 (2014).
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Fast efficient XFM: Strength
In situ and time-based studies
Mn Ca Compton
Images, data Peter Kopittke & Pax Blamey (U. QLD) Paper submitted PNAS
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Ca Ni
Mn
Alyssum leaf
van der Ent, Harris (2016)
2300 * 3500 pix = 8 Mpix,
dwell = 200 µs, dx = dy = 2 µm
Exposure time = 25 min
Duration = 31 min
Estimated duration without RASCAN = 46 min
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synchrotron.org.au
TwinMic: Elletra
• European Soft X-ray Transmission and
Emission Microscope
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synchrotron.org.au
X-ray Absorption Spectroscopy @ XFM
Access to most heavy elements (4 - 25 keV)
[https://magoosh.com/ged/ged-science-periodic-table/]
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synchrotron.org.au
Full spectral data collection:
raster sample through beam
Conventional synchrotron approach:
Read-out N full spectra at each pixel (~1 sec)
• 150 x 150 pixels ~6-7 hours
• 15 minutes ~30 x 30 pixels
Detector array: N detectors
Raster sample in X,Y through microbeam
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Full spectral data collection:
Event-by-event processing
Nuclear physics approach:
Sample X,Y for each detected X-ray event
• Freedom to use high scan rates
• Real-time processing of event stream
List-mode data stream:
X2, Y2, E2, n2
X3, Y3, E3, n3
X4, Y4, E4, n4
X5, Y5, E5, n5
X6, Y6, E6, n6
X7, Y7, E7, n7
X1, Y1, E1, n1
Xi X coordinate
Yi Y coordinate
Ei Energy
ni Detector #
Approach used on Nuclear Microprobe and XFM at Australian Synchrotron