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      Recent progress on MOF-based optical sensors for VOC sensing

      review-article
      , ,
      Chemical Science
      The Royal Society of Chemistry

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          Abstract

          The raising apprehension of volatile organic compound (VOC) exposures urges the exploration of advanced monitoring platforms. Metal–organic frameworks (MOFs) provide many attractive features including tailorable porosity, high surface areas, good chemical/thermal stability, and various host–guest interactions, making them appealing candidates for VOC capture and sensing. To comprehensively exploit the potential of MOFs as sensing materials, great efforts have been dedicated to the shaping and patterning of MOFs for next-level device integration. Among different types of sensors (chemiresistive sensors, gravimetric sensors, optical sensors, etc.), MOFs coupled with optical sensors feature distinctive strength. This review summarized the latest advancements in MOF-based optical sensors with a particular focus on VOC sensing. The subject is discussed by different mechanisms: colorimetry, luminescence, and sensors based on optical index modulations. Critical analysis for each system highlighting practical aspects was also deliberated.

          Abstract

          MOF-based optical sensors can achieve volatile organic compound sensing via different mechanisms: colorimetric sensing, luminescent sensing and optical-index modulation sensing.

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          Most cited references193

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          Double-slit photoelectron interference in strong-field ionization of the neon dimer

          Wave-particle duality is an inherent peculiarity of the quantum world. The double-slit experiment has been frequently used for understanding different aspects of this fundamental concept. The occurrence of interference rests on the lack of which-way information and on the absence of decoherence mechanisms, which could scramble the wave fronts. Here, we report on the observation of two-center interference in the molecular-frame photoelectron momentum distribution upon ionization of the neon dimer by a strong laser field. Postselection of ions, which are measured in coincidence with electrons, allows choosing the symmetry of the residual ion, leading to observation of both, gerade and ungerade, types of interference.
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            Anomalous collapses of Nares Strait ice arches leads to enhanced export of Arctic sea ice

            The ice arches that usually develop at the northern and southern ends of Nares Strait play an important role in modulating the export of Arctic Ocean multi-year sea ice. The Arctic Ocean is evolving towards an ice pack that is younger, thinner, and more mobile and the fate of its multi-year ice is becoming of increasing interest. Here, we use sea ice motion retrievals from Sentinel-1 imagery to report on the recent behavior of these ice arches and the associated ice fluxes. We show that the duration of arch formation has decreased over the past 20 years, while the ice area and volume fluxes along Nares Strait have both increased. These results suggest that a transition is underway towards a state where the formation of these arches will become atypical with a concomitant increase in the export of multi-year ice accelerating the transition towards a younger and thinner Arctic ice pack.
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              Present and Future of Surface-Enhanced Raman Scattering

              The discovery of the enhancement of Raman scattering by molecules adsorbed on nanostructured metal surfaces is a landmark in the history of spectroscopic and analytical techniques. Significant experimental and theoretical effort has been directed toward understanding the surface-enhanced Raman scattering (SERS) effect and demonstrating its potential in various types of ultrasensitive sensing applications in a wide variety of fields. In the 45 years since its discovery, SERS has blossomed into a rich area of research and technology, but additional efforts are still needed before it can be routinely used analytically and in commercial products. In this Review, prominent authors from around the world joined together to summarize the state of the art in understanding and using SERS and to predict what can be expected in the near future in terms of research, applications, and technological development. This Review is dedicated to SERS pioneer and our coauthor, the late Prof. Richard Van Duyne, whom we lost during the preparation of this article.
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                Author and article information

                Journal
                Chem Sci
                Chem Sci
                SC
                CSHCBM
                Chemical Science
                The Royal Society of Chemistry
                2041-6520
                2041-6539
                5 October 2022
                7 December 2022
                5 October 2022
                : 13
                : 47
                : 13978-14007
                Affiliations
                [a] Institut des Matériaux Poreux de Paris, Ecole Normale Supérieure, ESPCI Paris, CNRS, PSL University 75005 Paris France antoine.tissot@ 123456ens.psl.eu christian.serre@ 123456ens.psl.eu
                Author information
                https://orcid.org/0000-0003-1528-7641
                Article
                d2sc04314a
                10.1039/d2sc04314a
                9728564
                36540831
                16879093-68da-4821-8c39-d5af611e7de7
                This journal is © The Royal Society of Chemistry
                History
                : 3 August 2022
                : 4 October 2022
                Page count
                Pages: 30
                Funding
                Funded by: H2020 Marie Skłodowska-Curie Actions, doi 10.13039/100010665;
                Award ID: 754387
                Categories
                Chemistry
                Custom metadata
                Paginated Article

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