Nanofocused x-ray photon correlation spectroscopy
(2022) In Physical Review Research 4(3).- Abstract
Here, we demonstrate an experimental proof of concept for nanofocused x-ray photon correlation spectroscopy, a technique sensitive to nanoscale fluctuations present in a broad range of systems. The experiment, performed at the NanoMAX beamline at MAX IV, uses a novel event-based x-ray detector to capture nanoparticle structural dynamics with microsecond resolution. By varying the nanobeam size from σ=88 nm to σ=2.5μm, we quantify the effect of the nanofocus on the small-angle scattering lineshape and on the diffusion coefficients obtained from nano-XPCS. We observe that the use of nanobeams leads to a multifold increase in speckle contrast, which greatly improves the experimental signal-to-noise ratio, quantified from the two-time... (More)
Here, we demonstrate an experimental proof of concept for nanofocused x-ray photon correlation spectroscopy, a technique sensitive to nanoscale fluctuations present in a broad range of systems. The experiment, performed at the NanoMAX beamline at MAX IV, uses a novel event-based x-ray detector to capture nanoparticle structural dynamics with microsecond resolution. By varying the nanobeam size from σ=88 nm to σ=2.5μm, we quantify the effect of the nanofocus on the small-angle scattering lineshape and on the diffusion coefficients obtained from nano-XPCS. We observe that the use of nanobeams leads to a multifold increase in speckle contrast, which greatly improves the experimental signal-to-noise ratio, quantified from the two-time intensity correlation functions. We conclude that it is possible to account for influence of the high beam divergence on the lineshape and measured dynamics by including a convolution with the nanobeam profile in the model.
(Less)
- author
- organization
- publishing date
- 2022-07
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Research
- volume
- 4
- issue
- 3
- article number
- L032012
- publisher
- American Physical Society
- external identifiers
-
- scopus:85136471642
- ISSN
- 2643-1564
- DOI
- 10.1103/PhysRevResearch.4.L032012
- language
- English
- LU publication?
- yes
- id
- 5468fa8f-0b46-4a7b-bf38-ed3a48c104e8
- date added to LUP
- 2023-01-02 14:23:06
- date last changed
- 2023-05-10 15:10:59
@article{5468fa8f-0b46-4a7b-bf38-ed3a48c104e8, abstract = {{<p>Here, we demonstrate an experimental proof of concept for nanofocused x-ray photon correlation spectroscopy, a technique sensitive to nanoscale fluctuations present in a broad range of systems. The experiment, performed at the NanoMAX beamline at MAX IV, uses a novel event-based x-ray detector to capture nanoparticle structural dynamics with microsecond resolution. By varying the nanobeam size from σ=88 nm to σ=2.5μm, we quantify the effect of the nanofocus on the small-angle scattering lineshape and on the diffusion coefficients obtained from nano-XPCS. We observe that the use of nanobeams leads to a multifold increase in speckle contrast, which greatly improves the experimental signal-to-noise ratio, quantified from the two-time intensity correlation functions. We conclude that it is possible to account for influence of the high beam divergence on the lineshape and measured dynamics by including a convolution with the nanobeam profile in the model.</p>}}, author = {{Berkowicz, Sharon and Das, Sudipta and Reiser, Mario and Filianina, Mariia and Bin, Maddalena and Crevatin, Giulio and Hennies, Franz and Weninger, Clemens and Björling, Alexander and Bell, Paul and Perakis, Fivos}}, issn = {{2643-1564}}, language = {{eng}}, number = {{3}}, publisher = {{American Physical Society}}, series = {{Physical Review Research}}, title = {{Nanofocused x-ray photon correlation spectroscopy}}, url = {{http://dx.doi.org/10.1103/PhysRevResearch.4.L032012}}, doi = {{10.1103/PhysRevResearch.4.L032012}}, volume = {{4}}, year = {{2022}}, }