Shear-induced ordering in liquid microjets seen by x-ray cross correlation analysis

Markmann, Verena; Dartsch, Michael; Valério, Joana; Frenzel, Lara; Lokteva, Irina; Walther, Michael; Westermeier, Fabian; Grübel, G.; Lehmkühler, Felix

doi:10.1063/4.0000038

Cited by 5 publications

(4 citation statements)

References 43 publications

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“…For typical values of . γ∼ 1 s −1 , a ∼ 150 nm, resultant orders of magnitude are D 0~1 × 10 −15 cm 2 s −1 and Pe ≥ 10 5 ; this even exceeds the values characteristic of some colloids reported in strongly confined geometries and flows [48][49][50]. The colloidal systems are also entropy driven; metastable crystallization structures are determined by free-energy minima from a combination of electrostatic forces and interparticle interactions [51].…”

Section: Introductionmentioning

confidence: 82%

An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal Media

2021

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A study is presented of the oscillatory shear-ordering dynamics of viscoelastic photonic crystal media, using an optical shear cell. The hard-sphere/“sticky”-shell design of these polymeric composite particles produces athermal, quasi-solid rubbery media, with a characteristic viscoelastic ensemble response to applied shear. Monotonic crystallization processes, as directly measured by the photonic stopband transmission, are tracked as a function of strain amplitude, oscillation frequency, and temperature. A complementary generic spatio-temporal model is developed of crystallization due to shear-dependent interlayer viscosity, giving propagating crystalline fronts with increasing applied strain, and a gradual transition from interparticle disorder to order. The introduction of a competing shear-induced flow degradation process, dependent on the global shear rate, gives solutions with both amplitude and frequency dependence. The extracted crystallization timescales show parametric trends which are in good qualitative agreement with experimental observations.

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Section: Introductionmentioning

confidence: 82%

An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal Media

2021

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“…The wide jets generated by nozzle types D and E (with jet velocities below 20 m s À1 ) allow, for instance, atmospheric operation at synchrotron sources, e.g. for scattering experiments on colloidal systems (Lehmku ¨hler et al, 2017;Markmann et al, 2020). Table 2 provides a comprehensive list of the sample delivery devices currently available at the EuXFEL.…”

Section: Design Parametersmentioning

confidence: 99%

3D printed devices and infrastructure for liquid sample delivery at the European XFEL

Vakili¹,

Bielecki²,

Knoška³

et al. 2022

J Synchrotron Rad

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The Sample Environment and Characterization (SEC) group of the European X-ray Free-Electron Laser (EuXFEL) develops sample delivery systems for the various scientific instruments, including systems for the injection of liquid samples that enable serial femtosecond X-ray crystallography (SFX) and single-particle imaging (SPI) experiments, among others. For rapid prototyping of various device types and materials, sub-micrometre precision 3D printers are used to address the specific experimental conditions of SFX and SPI by providing a large number of devices with reliable performance. This work presents the current pool of 3D printed liquid sample delivery devices, based on the two-photon polymerization (2PP) technique. These devices encompass gas dynamic virtual nozzles (GDVNs), mixing-GDVNs, high-viscosity extruders (HVEs) and electrospray conical capillary tips (CCTs) with highly reproducible geometric features that are suitable for time-resolved SFX and SPI experiments at XFEL facilities. Liquid sample injection setups and infrastructure on the Single Particles, Clusters, and Biomolecules and Serial Femtosecond Crystallography (SPB/SFX) instrument are described, this being the instrument which is designated for biological structure determination at the EuXFEL.

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“…In the following, theory works showed the potentials and limitations of this method. [131,[244][245][246][247][248][249] Besides studies on NP self-assembly, XCCA was applied in different X-ray scattering experiments on, e.g., symmetry of magnetic domains, [250] ordering in liquid crystals, [251][252][253] polymers [254,255] and colloids, [256] particle orientations and structures in liquid jets [257][258][259] as well as correlations between dynamics and structure close to vitrification of hard spheres. [260] In XCCA experiments, the local order is obtained from the full 2D scattering pattern.…”

Section: X-ray Cross-correlation Analysis (Xcca)mentioning

confidence: 99%

Recent Notable Approaches to Study Self‐Assembly of Nanoparticles with X‐Ray Scattering and Electron Microscopy

Schulz

Lokteva

Parak

et al. 2021

Part & Part Syst Charact

Self Cite

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several issues far from being resolved: for many systems long-range periodic order is not routinely achieved, reproducibility is often not optimal and truly emergent and new properties arising from the supercrystal formation could be demonstrated for just a few systems. [3][4][5][6][7] From the materials science perspective there is no established figure of merit or common set of parameters allowing to quantify "quality" of NP superlattices and supercrystals. In lieu of such standard procedures, terms as well-ordered, crystalline order, quasicrystalline, etc., are usually used in literature. However, there exist no commonly accepted definitions of what qualifies, e.g., as "well-ordered."In this review, we want to highlight some recent experimental developments and new approaches to study self-assembly of NPs or structure formation of NP supercrystals and their final structure. We focus on NP, the broad field of photonic materials prepared by self-assembly of larger colloidal particles is not covered herein. [8][9][10] The introduction of the basic concepts of NP self-assembly will be kept short and should be considered as an overview, for more background and details excellent comprehensive reviews are available. [2,11] We will then briefly address and discuss the expectations associated with self-assembled materials, especially the proposed emergence of new properties directly related to order. In the second part of the review, we will present recent innovative approaches for the investigation of self-assembly and self-assembled structures that go beyond the standard characterization. We focus mainly on structure and structure formation and less on properties, so most of the studies are based on scattering and electron microscopy. Figure 1 provides an overview roughly following this outline. Self-Assembly of NanoparticlesSelf-assembly is a broad term and occurs on all scales from atoms, ions, and molecules to galaxies, as pointed out by Whitesides and Grzybowski. [12] It can be defined as the autonomous organization of multiple discrete components into ordered structures, driven by energetics or entropy or both. [2,13] In nature, countless examples of highly complex and functional structures resulting from self-assembly can be found, Self-assembly of nanoparticles (NPs) has evolved into a powerful tool for the synthesis of superstructures with tailored properties. The quality, diversity, and complexity of synthesized structures are continuously improving and fascinating new collective properties are demonstrated. At the same time, the rapid development of electron microscopy and synchrotron sources for X-rays has enabled new exciting experimental approaches to study structure and structure formation in the context of NP self-assembly. In this review, some recent studies and what can be learned from them are highlighted and discussed. It is started with a general introduction covering important concepts, experimental approaches, commonly obtained structures, the ideas of artificial atoms, and emerging properties a...

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Shear-induced ordering in liquid microjets seen by x-ray cross correlation analysis

Cited by 5 publications

References 43 publications

An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal Media

An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal Media

3D printed devices and infrastructure for liquid sample delivery at the European XFEL

Recent Notable Approaches to Study Self‐Assembly of Nanoparticles with X‐Ray Scattering and Electron Microscopy

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