Acoustic response of a laser-excited polycrystalline Au-film studied by ultrafast Debye–Scherrer diffraction at a table-top short-pulse x-ray source

Lü, Wei; Nicoul, M.; Shymanovich, U.; Brinks, Fabian; Afshari, Mohammadmahdi; Tarasevitch, A.; Linde, D. von der; Sokolowski‐Tinten, K.

doi:10.1063/1.5142220

Cited by 9 publications

(3 citation statements)

References 50 publications

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“…In addition, compared with the XRD of the standard UiO-66, the diffraction peaks of four kinds of UIO-66-(COOH) 2 were diffused and widened. According to the Debye-Scherrer formula [34], this is as a result of the smaller particle size of the MOF nanoparticles (~50 nm), which is consistent with the results of the transmission electron microscopy. Sherrer's formula describes the relationship between grain size and half peak width of the diffraction peak.…”

Section: Preparation and Characterization Of Uio-66-(cooh) 2 Crystalsupporting

confidence: 88%

Negatively Charged MOF-Based Composite Anion Exchange Membrane with High Cation Selectivity and Permeability

Afsar

Chen

et al. 2022

Membranes

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Every metal and metallurgical industry is associated with the generation of wastewater, influencing the living and non-living environment, which is alarming to environmentalists. The strict regulations about the dismissal of acid and metal into the environment and the increasing emphasis on the recycling/reuse of these effluents after proper remedy have focused the research community’s curiosity in developing distinctive approaches for the recovery of acid and metals from industrial wastewaters. This study reports the synthesis of UiO-66-(COOH)2 using dual ligand in water as a green solvent. Then, the prepared MOF nanoparticles were introduced into the DMAM quaternized QPPO matrix through a straightforward blending approach. Four defect-free UiO-66-(COOH)2/QPPO MMMs were prepared with four different MOF structures. The BET characterization of UiO-66-(COOH)2 nanoparticles with a highly crystalline structure and sub-nanometer pore size (~7 Å) was confirmed by XRD. Because of the introduction of MOF nanoparticles with an electrostatic interaction and pore size screening effect, a separation coefficient (SHCl/FeCl2) of 565 and UHCl of 0.0089 m·h−1 for U-C(60)/QPPO were perceived when the loading dosage of the MOF content was 10 wt%. The obtained results showed that the prepared defect-free MOF membrane has broad prospects in acid recovery applications.

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Section: Preparation and Characterization Of Uio-66-(cooh) 2 Crystalsupporting

confidence: 88%

Negatively Charged MOF-Based Composite Anion Exchange Membrane with High Cation Selectivity and Permeability

Afsar

Chen

et al. 2022

Membranes

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“…Their characteristics and operating capabilities have been improved for decades 5 – 8 especially thanks to the continuous progress of femtosecond lasers in terms of intensity, spatial and temporal beam quality, repetition rate, reliability and compactness. In particular, such x-ray sources of ultrashort pulse duration driven by femtosecond laser systems offer an intrinsic synchronization for pump and probe experiments like time-resolved x-ray diffraction 9 and time-resolved x-ray absorption spectroscopy 10 .…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of size broadening of a Kα x-ray source produced by high intensity laser pulses

Gambari

Clady

Videau

et al. 2021

Sci Rep

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The size of a hard Kα x-ray source ($${\mathrm{E}}_{{\rm{K}}_{\rm{\alpha }}}$$ E K α = 17.48 keV) produced by a high intensity femtosecond laser interacting with a solid molybdenum target is experimentally investigated for a wide range of laser intensity (I ~ 1017–2.8 × 1019 W/cm2) and for four values of the temporal contrast ratio (6.7 × 107 < CR < 3.3 × 1010). Results point out the size enlargement of the x-ray source with the increase of laser intensity and with the deterioration of temporal contrast. It amounts up to sixteen times the laser spot size at the highest laser intensity and for the lowest temporal contrast ratio. Using hydrodynamic simulations, we evaluate the density scale length of the pre-plasma L/λ just before the main pulse peak. This allows us to show that a direct correlation with the laser absorption mechanisms is not relevant to explain the large size broadening. By varying the thickness of the molybdenum target down to 4 µm, the impact of hot electron scattering inside the solid is also proved irrelevant to explain the evolution of both the x-ray source size and the Kα photon number. We deduce that the most probable mechanism yielding to the broadening of the source size is linked to the creation of surface electromagnetic fields which confine the hot electrons at the solid surface. This assumption is supported by dedicated experiments where the evolution of the size enlargement of the x-ray source is carefully studied as a function of the laser focal spot size for the highest contrast ratio.

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“…The advent of compact table-top laser-driven pulsed X-ray sources (Korn et al, 2002;Zamponi et al, 2009;Uhlig et al, 2013) has enabled significant progress in time-resolved studies (Rischel et al, 1997;Rousse et al, 2001;Hauf et al, 2019;Lu et al, 2020) using mid-to high-power laser systems (e.g. Batysta et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Implementation of a crossed-slit system for fast alignment of sealed polycapillary X-ray optics

Zymaková¹,

Khakurel²,

Picchiotti³

et al. 2020

J Synchrotron Radiat

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A new modification of a table-top laser-driven water-jet plasma X-ray source has been successfully implemented and commissioned at the Extreme Light Infrastructure (ELI) Beamlines user facility. In order to preserve the broadband nature of the source for spectroscopic experiments, a polycapillary lens was initially chosen as the focusing element. Generally, polycapillary X-ray optics have a narrow photon acceptance angle and small field of view, making alignment complicated and time-consuming. This contribution demonstrates a straightforward, reliable and reproducible procedure for aligning polycapillary focusing optics with broadband X-rays. The method involves a pre-alignment step where two X-ray slits are mounted orthogonally on opposite sides of a 3D-printed cylindrical polycapillary holder. This helps to precisely determine the optical axis of the X-ray beam. Subsequent mounting of the polycapillary in the pre-aligned holder with the slits removed allowed for immediate transmission of the X-ray photons through the optics and has provided a good starting point for fine alignment.

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Acoustic response of a laser-excited polycrystalline Au-film studied by ultrafast Debye–Scherrer diffraction at a table-top short-pulse x-ray source

Cited by 9 publications

References 50 publications

Negatively Charged MOF-Based Composite Anion Exchange Membrane with High Cation Selectivity and Permeability

Negatively Charged MOF-Based Composite Anion Exchange Membrane with High Cation Selectivity and Permeability

Experimental investigation of size broadening of a Kα x-ray source produced by high intensity laser pulses

Implementation of a crossed-slit system for fast alignment of sealed polycapillary X-ray optics

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