<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2448-5691</journal-id>
<journal-title><![CDATA[Mundo nano. Revista interdisciplinaria en nanociencias y nanotecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Mundo nano]]></abbrev-journal-title>
<issn>2448-5691</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias Aplicadas y Tecnología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-56912023000200103</article-id>
<article-id pub-id-type="doi">10.22201/ceiich.24485691e.2023.31.69774</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Desarrollo y evaluación de un sensor portátil para la detección de Hg2+, a través de la síntesis verde de AuNP utilizando extracto acuoso de Sargassum spp]]></article-title>
<article-title xml:lang="en"><![CDATA[Development and evaluation of a portable sensor for Hg2+ detection by AuNP green synthesis using Sargassum spp aqueous extract]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Molina]]></surname>
<given-names><![CDATA[Gustavo A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Miranda]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Reyna]]></surname>
<given-names><![CDATA[Marlen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Esparza]]></surname>
<given-names><![CDATA[Rodrigo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estevez]]></surname>
<given-names><![CDATA[Miriam]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Física Aplicada y Tecnología Avanzada Posgrado en Ciencia e Ingeniería de Materiales]]></institution>
<addr-line><![CDATA[ Querétaro]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Física Aplicada y Tecnología Avanzada ]]></institution>
<addr-line><![CDATA[ Querétaro]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>16</volume>
<numero>31</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-56912023000200103&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-56912023000200103&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-56912023000200103&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El presente trabajo tiene la finalidad de dar a conocer el desarrollo de un prototipo de sensor para la medición de mercurio (Hg2+) en solución acuosa sobre una plataforma electroquímica basada en electrodos serigrafiados de nanotubos de carbonos (CNT-SPE) en conjunto con nanopartículas de oro (NPs-Au) realizadas a través de síntesis verde, utilizando extracto acuoso de Sargassum spp. Para esto, se realizó la caracterización de las NPs-Au por espectroscopía ultravioleta-visible (UV-Vis), infrarrojo (TF-IR), difracción de rayos X (DRX) y microscopía electrónica de barrido (SEM); obteniendo nanopartículas entre 80-100 nm las cuales poseen un recubrimiento orgánico que les confiere una sinergia al momento de ser conjugadas con CNT-SPE oxidadas/activadas. Posteriormente, las NPs-Au se utilizaron para modificar el CNT-SPE a través del método drop-casting y así ensamblar un novedoso sensor electroquímico para la medición de Hg2+, cuya validación y habilidad para medir fue demostrada utilizando voltametría diferencial de pulso (DPV). Se obtuvieron límites de detección de 2.38 &#120583;M y cuantificación de 3 &#120583;M. Los resultados demuestran que la plataforma desarrollada es una alternativa, rápida, eficiente y portátil para la medición de Hg2+.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The present manuscript&#8217;s objective is to develop a sensor prototype for measuring mercury (Hg2+) in an aqueous solution. An electrochemical platform based on screen-printed carbon nanotube electrodes (CNT-SPE) and gold nanoparticles (NPs-Au) synthesized using a green synthesis method with an aqueous extract of Sargassum spp. For this, the characterization of the NPs-Au was carried out by ultraviolet-visible (UV-Vis), infrared (TF-IR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) spectroscopy. The nanoparticles have sizes between 80-100 nm and an organic coating that allows them a synergy when conjugated with oxidized/activated CNT-SPE. Subsequently, the NPs-Au were used to modify the CNT-SPE through the drop-casting method and thus assemble a novel electrochemical sensor for the measurement of Hg2+, whose validation and ability to measure was demonstrated using differential pulse voltammetry (DPV). Detection limits of 2.38 &#120583;M and quantification of 3 &#120583;M were obtained. The results show that the developed platform is a fast, efficient and portable alternative for the measurement of Hg2+.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[sensor electroquímico]]></kwd>
<kwd lng="es"><![CDATA[nanopartículas de oro]]></kwd>
<kwd lng="es"><![CDATA[mercurio]]></kwd>
<kwd lng="es"><![CDATA[sargazo]]></kwd>
<kwd lng="es"><![CDATA[electrodos serigrafiados]]></kwd>
<kwd lng="en"><![CDATA[electrochemical sensor]]></kwd>
<kwd lng="en"><![CDATA[gold nanoparticles]]></kwd>
<kwd lng="en"><![CDATA[mercury]]></kwd>
<kwd lng="en"><![CDATA[sargassum]]></kwd>
<kwd lng="en"><![CDATA[screen-printed electrodes]]></kwd>
</kwd-group>
</article-meta>
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