2019 atomic spectrometry update – a review of advances in X-ray fluorescence spectrometry and its special applications

Vanhoof, Christine; Bacon, Jeffrey R.; Ellis, Andrew T.; Fittschen, Ursula E. A.; Vincze, László

doi:10.1039/c9ja90042j

Cited by 37 publications

(25 citation statements)

References 131 publications

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“…XRF image resolution can be in the order of few microns and its penetration depth is just a couple of mm [ 12 ]. Micro-XRF has been used in plant and soil sciences, biology, and geosciences either as a standalone technique or in combination with other techniques [ 189 , 190 , 191 , 192 ].…”

Section: Imaging Techniquesmentioning

confidence: 99%

Review of Microfluidic Devices and Imaging Techniques for Fluid Flow Study in Porous Geomaterials

Jahanbakhsh

Wlodarczyk

Hand

et al. 2020

Sensors

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Understanding transport phenomena and governing mechanisms of different physical and chemical processes in porous media has been a critical research area for decades. Correlating fluid flow behaviour at the micro-scale with macro-scale parameters, such as relative permeability and capillary pressure, is key to understanding the processes governing subsurface systems, and this in turn allows us to improve the accuracy of modelling and simulations of transport phenomena at a large scale. Over the last two decades, there have been significant developments in our understanding of pore-scale processes and modelling of complex underground systems. Microfluidic devices (micromodels) and imaging techniques, as facilitators to link experimental observations to simulation, have greatly contributed to these achievements. Although several reviews exist covering separately advances in one of these two areas, we present here a detailed review integrating recent advances and applications in both micromodels and imaging techniques. This includes a comprehensive analysis of critical aspects of fabrication techniques of micromodels, and the most recent advances such as embedding fibre optic sensors in micromodels for research applications. To complete the analysis of visualization techniques, we have thoroughly reviewed the most applicable imaging techniques in the area of geoscience and geo-energy. Moreover, the integration of microfluidic devices and imaging techniques was highlighted as appropriate. In this review, we focus particularly on four prominent yet very wide application areas, namely “fluid flow in porous media”, “flow in heterogeneous rocks and fractures”, “reactive transport, solute and colloid transport”, and finally “porous media characterization”. In summary, this review provides an in-depth analysis of micromodels and imaging techniques that can help to guide future research in the in-situ visualization of fluid flow in porous media.

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Section: Imaging Techniquesmentioning

confidence: 99%

Review of Microfluidic Devices and Imaging Techniques for Fluid Flow Study in Porous Geomaterials

Jahanbakhsh

Wlodarczyk

Hand

et al. 2020

Sensors

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“…Two categories of analyses should be used at this stage: those that acquire information on the number of building units and those investigating the number of connections. The first set of analyses can be made using techniques that provide reliable compositional information such as inductively coupled plasma-optical emission spectroscopy or mass spectrometry, [37] elemental analysis, energy-dispersive X-ray spectroscopy, [34,38] X-ray fluorescence, [39] and nuclear magnetic resonance spectroscopy. Thermogravimetric analyses can also provide useful insight into the ratio between organic and inorganic building blocks, which can be compared with the other techniques.…”

Section: Connection Completeness (κ) Describes the Degree Of Architecmentioning

confidence: 99%

Circumventing Wear and Tear of Adaptive Porous Materials

Canossa

Wuttke

2020

Adv Funct Materials

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The assessment of the architectural stability of molecular porous materials is not yet a common practice, but critical to their understanding and development. The conformational adaptation of porous materials to guest binding and other chemical dynamics poses a risk of architectural damage, leading to performance deterioration during their prolonged usage. The deformation of the framework backbone and the disconnection of building units are driven by chemical, mechanical, and thermal perturbations, and can be quantitatively described by the term connection completeness. Analytical means that can be used to measure this parameter are presented in order to provide a standard, practical protocol for evaluating architectural damage made to framework materials. Preventive and remedial strategies are proposed for enhancing the architectural integrity of frameworks without compromising their functional mechanisms, paving the way to the design of robust yet adaptive materials. In this way, the discussion on architectural stability is initiated, and readers are encouraged to carefully characterize molecular porous materials for a better understanding of their structure-property relationship.

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“…Recently, De Almeida [110] used a multivariate approach to evaluate multiple regions in the XRF spectra and obtain the thicknesses of polymeric films. To keep up with all the innovations in this field, every year a review [111][112][113] on the latest advances in XRF group techniques is published to highlight developments in instrumentation, methodologies, and data handling.…”

Section: X-ray Fluorescence Spectroscopymentioning

confidence: 99%

Measuring the Thickness of Metal Films: A Selection Guide to the Most Suitable Technique

Giurlani

Berretti

Lavacchi

et al. 2020

2nd Coatings and Interfaces Web Conference (CIWC-2 2020)

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The determination of thickness has a fundamental importance in all fields in which the implementation of films and coatings are required and takes a crucial role in the electroplating sector. The thickness influences many aspects of the coatings such as electrical, mechanical, corrosion protection, and even aesthetic properties. In the multitude of applications of thin layer coatings, the variability of thicknesses and materials is very high, as well as the variability of possible techniques that can be used to determine the characteristics of the layers of interest. The first distinction that can be made between these techniques is that which divides destructive techniques from non-destructive ones, in which, however, the semi- or micro-destructive techniques are immediately difficult to place. Other important parameters to consider are the cost, both for the purchase of the instrumentation and for each single analysis, the difficulties in preparing and measuring the sample, data processing, and obviously the detectable thickness ranges, the possible measurable materials, and precision and accuracy. The purpose of this work is to compare the characteristics of the various investigation methods, with a particular focus on metal film applications, so that it will be easier to choose the most suitable technique for each purpose.

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2019 atomic spectrometry update – a review of advances in X-ray fluorescence spectrometry and its special applications

Abstract: This 2019 review covers developments in and applications of XRF techniques such as EDXRF, WDXRF, TXRF, XRF microscopy using technologies such as synchrotron sources, X-ray optics, X-ray tubes and detectors in laboratory, mobile and hand-held systems.

Cited by 37 publications

References 131 publications

Review of Microfluidic Devices and Imaging Techniques for Fluid Flow Study in Porous Geomaterials

Review of Microfluidic Devices and Imaging Techniques for Fluid Flow Study in Porous Geomaterials

Circumventing Wear and Tear of Adaptive Porous Materials

Measuring the Thickness of Metal Films: A Selection Guide to the Most Suitable Technique

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