Recent Advances in Transmission Electron Microscopy for Materials Science at the EMAT Lab of the University of Antwerp

Guzzinati, Giulio; Altantzis, Thomas; Batuk, Maria; Backer, Annick De; Lumbeeck, Gunnar; Samaee, Vahid; Batuk, Dmitry; Idrissi, Hosni; Hadermann, Joke; Aert, Sandra Van; Schryvers, D.; Verbeeck, Johan

doi:10.3390/ma11081304

Cited by 21 publications

(15 citation statements)

References 123 publications

(157 reference statements)

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“…Direct imaging techniques such as electron microscopy also provide unique opportunities for structure analysis at a more local scale and thus complement diffraction techniques [12,13]. A transmission electron microscope (TEM), for example, can provide multidimensional analysis…”

Section: Introductionmentioning

confidence: 99%

Structure of Manganese Oxide Nanoparticles Extracted via Pair Distribution Functions

et al. 2020

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The structure of nanoparticles has been difficult to determine accurately because the traditional structure methods rely on large monocrystals. Here, we discuss the structure of nanoparticles based on real-space modeling of the pair distribution function obtained by a Fourier transformation of the high-energy X-ray scattering structure factor. In particular, we consider X-ray scattering data taken from colloidal manganese oxide nanoparticles used in Lithium-ion batteries, air-purification, and biomedical systems, which are known to exist in various nanometer-sized polymorphs. Insight is thus obtained into characterizing the structural relaxation of the MnO6 octahedra, which are the key building blocks of oxide nanoparticles, important in many technologies.

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Section: Introductionmentioning

confidence: 99%

Structure of Manganese Oxide Nanoparticles Extracted via Pair Distribution Functions

et al. 2020

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“…Once the crystal structure is obtained, the unit cell volume and the number of connections per unit cell can be easily derived and used to obtain the theoretical connection density ρ C (number of connections per volume) of the ideally perfect crystal phase, as illustrated in the case of MOF-5 in Figure 3. As the next step, scanning and transmission electron microscopy [34,35] can be employed to obtain fine details about crystal size, morphology, and their distributions, while a combination of small angle X-ray scattering [36] and powder XRD (PXRD) can add valuable information to confirm the reliability of the outcomes of electron microscopy techniques. Once size and morphology have been determined, the volume can be readily calculated and all the values defining C max are available.…”

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

confidence: 99%

“…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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“…Since the early Thirties of the last century, when the first electron microscope was built, the high-resolution images provided by this revolutionary instrument has constituted an inexhaustible source of information in any research field of both life science 1 and materials science. 2 …”

Section: Introductionmentioning

confidence: 99%

Ultrastructural histochemistry in biomedical research: Alive and kicking

Malatesta

2018

Eur J Histochem

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The high-resolution images provided by the electron microscopy has constituted a limitless source of information in any research field of life and materials science since the early Thirties of the last century. Browsing the scientific literature, electron microscopy was especially popular from the 1970’s to 80’s, whereas during the 90’s, with the advent of innovative molecular techniques, electron microscopy seemed to be downgraded to a subordinate role, as a merely descriptive technique. Ultra -structural histochemistry was crucial to promote the Renaissance of electron microscopy, when it became evident that a precise localization of molecules in the biological environment was necessary to fully understand their functional role. Nowadays, electron microscopy is still irreplaceable for ultrastructural morphology in basic and applied biomedical research, while the application of correlative light and electron microscopy and of refined ultrastructural histochemical techniques gives electron microscopy a central role in functional cell and tissue biology, as a really unique tool for high-resolution molecular biology in situ.

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Recent Advances in Transmission Electron Microscopy for Materials Science at the EMAT Lab of the University of Antwerp

Cited by 21 publications

References 123 publications

Structure of Manganese Oxide Nanoparticles Extracted via Pair Distribution Functions

Structure of Manganese Oxide Nanoparticles Extracted via Pair Distribution Functions

Circumventing Wear and Tear of Adaptive Porous Materials

Ultrastructural histochemistry in biomedical research: Alive and kicking

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