A New Correlative Microscopy Platform Integrating AFM with in situ SEM
Kerim AratHamed AlemansourAndreas AmanLuis MontesJeffrey GardinerChris H SchwalbLukas StühnMarion WolffSebastian SeibertS. Spagna
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Journal Article A New Correlative Microscopy Platform Integrating AFM with in situ SEM Get access Kerim Arat, Kerim Arat Quantum Design Inc., San Diego, California, United States Search for other works by this author on: Oxford Academic Google Scholar Hamed Alemansour, Hamed Alemansour Quantum Design Inc., San Diego, California, United States Search for other works by this author on: Oxford Academic Google Scholar Andreas Aman, Andreas Aman Quantum Design Inc., San Diego, California, United States Search for other works by this author on: Oxford Academic Google Scholar Luis Montes, Luis Montes Quantum Design Inc., San Diego, California, United States Search for other works by this author on: Oxford Academic Google Scholar Jeffrey Gardiner, Jeffrey Gardiner Quantum Design Inc., San Diego, California, United States Search for other works by this author on: Oxford Academic Google Scholar Chris H Schwalb, Chris H Schwalb Quantum Design Microscopy, Darmstadt, Germany Search for other works by this author on: Oxford Academic Google Scholar Lukas Stühn, Lukas Stühn Quantum Design Microscopy, Darmstadt, Germany Search for other works by this author on: Oxford Academic Google Scholar Marion Wolff, Marion Wolff Quantum Design Microscopy, Darmstadt, Germany Search for other works by this author on: Oxford Academic Google Scholar Sebastian Seibert, Sebastian Seibert Quantum Design Microscopy, Darmstadt, Germany Search for other works by this author on: Oxford Academic Google Scholar Stefano Spagna Stefano Spagna Quantum Design Inc., San Diego, California, United States Corresponding author: stefano.spagna@qdusa.com. Search for other works by this author on: Oxford Academic Google Scholar Microscopy and Microanalysis, Volume 29, Issue Supplement_1, 1 August 2023, Pages 1944–1945, https://doi.org/10.1093/micmic/ozad067.1007 Published: 22 July 2023Keywords:
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Abstract This paper demonstrates the utilisation of in-situ synthesised novel metal organic framework (MOF)-polymer nanocomposite laser-sintered parts with enhanced CO2 adsorption properties. Making use of polyamide PA12, one of the most common materials in powder bed fusion process as the base polymer, an in-situ synthesis of nanofiller ZIF-67 crystals on the surface of polyamide polymer particles was proposed to allow the fabrication of a nanocomposite powder with a good dispersion, reducing any health and safety handling issue arising from use of loose nanoparticles. This in-situ synthesis method allowed a maximum exposure of the ZIF-67 nano-porous sites. Laser sintering was used to fabricate porous structures with additional macro-pores and controlled cavities to increase the surface area. The laser-sintered ZIF67-PA12 part at only 2.6% wt ZIF-67 concentration exhibited a CO2 capacity of 3.02 and 4.89 cm3/g at 298 K and 273 K at 1 bar. This in-situ synthesis method of making ZIF67-PA12 powders combined with the design freedom and the ease of fabrication of parts opens opportunities in a wider range of applications for MOFs such as energy storage and conversion.
Selective laser sintering
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Atomic force microscopy (AFM) has evolved from the originally morphological imaging technique to a powerful and multifunctional technique for manipulating and detecting the interactions between molecules at nanometer resolution. However, AFM cannot provide the precise information of synchronized molecular groups and has many shortcomings in the aspects of determining the mechanism of the interactions and the elaborate structure due to the limitations of the technology, itself, such as non-specificity and low imaging speed. To overcome the technical limitations, it is necessary to combine AFM with other complementary techniques, such as fluorescence microscopy. The combination of several complementary techniques in one instrument has increasingly become a vital approach to investigate the details of the interactions among molecules and molecular dynamics. In this review, we reported the principles of AFM and optical microscopy, such as confocal microscopy and single-molecule localization microscopy, and focused on the development and use of correlative AFM and optical microscopy.
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In this contribution, we combine for the first time tip-enhanced Raman spectroscopy (TERS) and photoinduced force microscopy (PiFM) synergistically and examine this instrumental approach on the 2D material molybdenum disulfide (MoS2). In a first step the PiFM technique was applied to map the electrical field distribution of the incident light field with nanometer resolution according to the plasmon resonance of the TERS tip. This experiment provides a fast and nondestructive characterization of the TERS tips focus interaction and is in good agreement with theoretical models. Subsequently, combined TERS and PiFM experiments on a MoS2 monolayer finally demonstrate a correlation of maximum TERS signal enhancement and the corresponding PiFM image with respect to the depth and lateral position of the focal laser spot. Hence, the results indicate a significantly improved route toward the alignment efficiency of TERS experiments and establish MoS2 as an outstandingly suitable TERS test sample.
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This review provides a detailed picture of the innovative efforts to combine atomic force microscopy and different super-resolution microscopy techniques to elucidate biological questions.
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Abstract Atomic force microscopy (AFM) is a nano‐mechanical tool uniquely suited for biological studies at the molecular scale. AFM operation is based on mechanical interaction between the tip and the sample, a mechanism of contrast capable of measuring different information, including surface topography, mechanical, and electrical properties. However, the lack of specificity highlights the need to integrate AFM data with other techniques providing compositional hints. In particular, optical microscopes based on fluorescence as a mechanism of contrast can access the local distribution of specific molecular species. The coupling between AFM and super‐resolved fluorescence microscopy solves the resolution mismatch between AFM and conventional fluorescence optical microscopy. Recent advances showed that also the inherently label‐free imaging capabilities of the AFM are fundamental to complement the fluorescence images. In this review, we have presented a brief historical view on correlative microscopy, and, finally, we have summarized the progress of correlative AFM‐super‐resolution microscopy in biological research.
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