<?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>0379-3982</journal-id>
<journal-title><![CDATA[Revista Tecnología en Marcha]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnología en Marcha]]></abbrev-journal-title>
<issn>0379-3982</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0379-39822017000500104</article-id>
<article-id pub-id-type="doi">10.18845/tm.v30i5.3221</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[CVD growth of ZnO nanorods in situ on graphene and the study of its application as photoanode for solar cells]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Madrigal-Monge]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chaves-Villareal]]></surname>
<given-names><![CDATA[Claudia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,geramadrigal@gmail.com  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>30</volume>
<fpage>104</fpage>
<lpage>118</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0379-39822017000500104&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0379-39822017000500104&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0379-39822017000500104&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We report on the synthesis of a hybrid three-dimensional nanomaterial made up by a graphene platform in which vertically aligned ZnO nanorods (VAZNR) are grown in situ. The procedure used for growing the graphene by chemical vapor deposition (CVD) and transferring it onto glass resulted in a high quality film, as verified by multiple characterization methods. A continuous thin layer of VAZNR was deposited by CVD with high crystallinity and vertical alignment, determined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The application of this hybrid nanomaterial was studied as photoanode of dye-sensitized solar cell (DSSC). A good mechanical stability of the hybrid in the corrosive I3 -/I-electrolyte environment was shown. However, the initial good electrical conductivity of graphene was lost during the deposition of ZnO, according to electrical and electrochemical studies of the DSSC. The graphene film is damaged at temperatures of 570 ° C with oxygen concentration as low as 0.4% v/v. As a result, the DSSC showed no photoresponse when tested under illumination. The hybrid material still could be useful for other applications, like piezoelectric and biomedical devices, where graphene can work as a flexible and conformational sacrificial template in the fabrication process.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se presenta la síntesis de un nanomaterial tridimensional híbrido formado por una plataforma de grafeno en donde se depositan in situ nanobarras de ZnO verticalmente alineadas (VAZNR). El procedimiento utilizado para el crecimiento de grafeno por deposición química de vapores (CVD) y la transferencia sobre vidrio resultó en una película de alta calidad, comprobado por diversos métodos de caracterización. Una capa delgada continua de VAZNR se depositó por CVD con alta cristalinidad y alineación vertical, según confirmamos por medio de difracción de rayos X (XRD) y microscopía electrónica de barrido (SEM). Se estudió la aplicación de este nanomaterial híbrido como el fotoánodo de una celda solar sensibilizada con tinte (DSSC). El fotoánodo mostró buena estabilidad mecánica en el entorno electrolítico corrosivo. Sin embargo, la buena conductividad eléctrica inicial de grafeno se perdió durante la deposición de ZnO, según determinamos por caracterización eléctrica y electroquímica de la DSSC. El grafeno sufre degradación térmica a 570&#730;C bajo concentraciones de oxígeno tan bajas como 0.4%v/v. Como resultado, la DSSC no mostró respuesta eléctrica cuando se expone a la iluminación. El material hibrido puede tener aplicación alternativa en dispositivos piezoelectricos, biomédicos, entre otros, donde el grafeno se utiliza como una plantilla de sacrificio flexible y coformacional en el proceso de fabricación.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Dye sensitized solar cell]]></kwd>
<kwd lng="en"><![CDATA[vertically aligned ZnO nanorods]]></kwd>
<kwd lng="en"><![CDATA[graphene-based photoanode]]></kwd>
<kwd lng="en"><![CDATA[electrochemical impedance spectroscopy]]></kwd>
<kwd lng="en"><![CDATA[thermal damage]]></kwd>
<kwd lng="en"><![CDATA[chemical vapor deposition]]></kwd>
</kwd-group>
</article-meta>
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