{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,18]],"date-time":"2026-01-18T03:09:16Z","timestamp":1768705756048,"version":"3.49.0"},"reference-count":59,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2022,3,7]],"date-time":"2022-03-07T00:00:00Z","timestamp":1646611200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this study, we report a novel and facile colorimetric assay based on silver citrate-coated Au@Ag nanoparticles (Au@AgNPs) as a chemosensor for the naked-eye detection of morphine (MOR). The developed optical sensing approach relied on the aggregation of Au@Ag NPs upon exposure to morphine, which led to an evident color variation from light-yellow to brown. Au@Ag NPs have been prepared by two different protocols, using high- and low-power ultrasonic irradiation. The sonochemical method was essential for the sensing properties of the resulting nanoparticles. This facile sensing method has several advantages including excellent stability, selectivity, prompt detection, and cost-effectiveness.<\/jats:p>","DOI":"10.3390\/s22052072","type":"journal-article","created":{"date-parts":[[2022,3,9]],"date-time":"2022-03-09T01:50:53Z","timestamp":1646790653000},"page":"2072","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":29,"title":["Naked-Eye Detection of Morphine by Au@Ag Nanoparticles-Based Colorimetric Chemosensors"],"prefix":"10.3390","volume":"22","author":[{"given":"Tahereh","family":"Rohani Bastami","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering and Energy, Quchan University of Technology, Quchan 94771-67335, Iran"}]},{"given":"Mansour","family":"Bayat","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering and Energy, Quchan University of Technology, Quchan 94771-67335, Iran"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2380-1404","authenticated-orcid":false,"given":"Roberto","family":"Paolesse","sequence":"additional","affiliation":[{"name":"Department of Chemical Science and Technologies, University of Rome Tor Vergata, Via Della Ricerca Scientifica 1, 00133 Rome, Italy"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1016\/j.talanta.2014.07.053","article-title":"Combination of electrochemistry with chemometrics to introduce an efficient analytical method for simultaneous quantification of five opium alkaloids in complex matrices","volume":"131","author":"Gholivand","year":"2015","journal-title":"Talanta"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"222","DOI":"10.1093\/jat\/9.5.222","article-title":"Simultaneous Identification and Quantitation of Codeine and Morphine in Urine by Capillary Gas Chromatography and Mass Spectroscopy","volume":"9","author":"Paul","year":"1985","journal-title":"J. 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