{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:21:18Z","timestamp":1760239278771,"version":"build-2065373602"},"reference-count":65,"publisher":"MDPI AG","issue":"21","license":[{"start":{"date-parts":[[2020,10,23]],"date-time":"2020-10-23T00:00:00Z","timestamp":1603411200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"iGOSP-ERAPLANET Project-Integrated Global Observing Systems for Persistent Pollutants (H2020-SC5-15-2015 \u201cStrengthening the European Research Area in the domain of Earth Observation\u201d)","award":["68944"],"award-info":[{"award-number":["68944"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Passive air samplers (PASs) have been used for mapping gaseous mercury concentration in extensive areas. In this work, an easy-to-use and -prepare gold nanoparticle (NP)-based PAS has been investigated. The PAS is constituted of a microfibrous quartz disk filter impregnated of gold NP photo-growth on TiO2 NPs (Au@TiO2) and used as gaseous mercury adsorbing material. The disk was housed in a cylinder glass container and subjected to an axial diffusive sampling. The adsorbed mercury was measured by thermal desorption using a Tekran\u00ae instrument. Different amounts of Au@TiO2 (ranging between 4.0 and 4.0 \u00d7 10\u22123 mg) were deposited by drop-casting onto the fibrous substrate and assessed for about 1 year of deployment in outdoor environment with a mercury concentration mean of about 1.24 \u00b1 0.32 ng\/m3 in order to optimize the adsorbing layer. PASs showed a linear relation of the adsorbed mercury as a function of time with a rate of 18.5 \u00b1 0.4 pg\/day (\u22481.5% of the gaseous concentration per day). However, only the PAS with 4 mg of Au@TiO2, provided with a surface density of about 3.26 \u00d7 10\u22122 mg\/mm2 and 50 \u03bcm thick inside the fibrous quartz, kept stability in working, with a constant sampling rate (SR) (0.0138 \u00b1 0.0005 m3\/day) over an outdoor monitoring experimental campaign of about 1 year. On the other hand, higher sampling rates have been found when PASs were deployed for a few days, making these tools also effective for one-day monitoring. Furthermore, these PASs were used and re-used after each thermal desorption to confirm the chance to reuse such structured layers within their samplers, thus supporting the purpose to design inexpensive, compact and portable air pollutant sampling devices, ideal for assessing both personal and environmental exposures. During the whole deployment, PASs were aided by simultaneous Tekran\u00ae measurements.<\/jats:p>","DOI":"10.3390\/s20216021","type":"journal-article","created":{"date-parts":[[2020,10,23]],"date-time":"2020-10-23T08:59:28Z","timestamp":1603443568000},"page":"6021","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Characteristics and Performances of a Nanostructured Material for Passive Samplers of Gaseous Hg"],"prefix":"10.3390","volume":"20","author":[{"given":"Joshua","family":"Avossa","sequence":"first","affiliation":[{"name":"Institute of Atmospheric Pollution Research\u2014National Research Council, Research Area of Rome 1, Via Salaria km 23,600, Monterotondo, 00016 Rome, Italy"},{"name":"Laboratory for Biomimetic Membranes and Textiles, Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9810-8746","authenticated-orcid":false,"given":"Fabrizio","family":"De Cesare","sequence":"additional","affiliation":[{"name":"Institute of Atmospheric Pollution Research\u2014National Research Council, Research Area of Rome 1, Via Salaria km 23,600, Monterotondo, 00016 Rome, Italy"},{"name":"Department of Innovation in Biological Systems, Food and Forestry (DIBAF), Via S. Camillo de Lellis, University of Tuscia, 00100 Viterbo, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3794-3988","authenticated-orcid":false,"given":"Paolo","family":"Papa","sequence":"additional","affiliation":[{"name":"Institute of Atmospheric Pollution Research\u2014National Research Council, Research Area of Rome 1, Via Salaria km 23,600, Monterotondo, 00016 Rome, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4344-5547","authenticated-orcid":false,"given":"Emiliano","family":"Zampetti","sequence":"additional","affiliation":[{"name":"Institute of Atmospheric Pollution Research\u2014National Research Council, Research Area of Rome 1, Via Salaria km 23,600, Monterotondo, 00016 Rome, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7513-6581","authenticated-orcid":false,"given":"Andrea","family":"Bearzotti","sequence":"additional","affiliation":[{"name":"Institute of Atmospheric Pollution Research\u2014National Research Council, Research Area of Rome 1, Via Salaria km 23,600, Monterotondo, 00016 Rome, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3662-7326","authenticated-orcid":false,"given":"Marcello","family":"Marelli","sequence":"additional","affiliation":[{"name":"Institute of Chemical Sciences and Technologies \u201cGiulio Natta\u201d (SCITEC)\u2014National Research Council, c\/o Area di Ricerca di Milano 1, Sede Fantoli, Via Fantoli 16\/15, 20138 Milano, Italy"}]},{"given":"Nicola","family":"Pirrone","sequence":"additional","affiliation":[{"name":"Institute of Atmospheric Pollution Research\u2014National Research Council, Division of Rende, UNICAL Polifuzionale, 87036 Rende, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6015-4832","authenticated-orcid":false,"given":"Antonella","family":"Macagnano","sequence":"additional","affiliation":[{"name":"Institute of Atmospheric Pollution Research\u2014National Research Council, Research Area of Rome 1, Via Salaria km 23,600, Monterotondo, 00016 Rome, Italy"},{"name":"Department of Innovation in Biological Systems, Food and Forestry (DIBAF), Via S. 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