<?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>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2023000300007</article-id>
<article-id pub-id-type="doi">10.31349/revmexfis.69.031001</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Optical and structural properties of graphene oxide-incorporated polyvinylpyrrolidone/copper ternary nanocomposites (PVP/Cu/GO) films]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Agobi]]></surname>
<given-names><![CDATA[A. U.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A3"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ikeuba]]></surname>
<given-names><![CDATA[A. I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ekpunobi]]></surname>
<given-names><![CDATA[A. J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ikhioya]]></surname>
<given-names><![CDATA[I. L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Udofia]]></surname>
<given-names><![CDATA[K. I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ntibi]]></surname>
<given-names><![CDATA[J. Effiom-Edem]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ozoemena]]></surname>
<given-names><![CDATA[C. N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Abua]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Nnamdi Azikiwe University Faculty of Physical Sciences Department of Physics and Industrial Physics]]></institution>
<addr-line><![CDATA[Awka ]]></addr-line>
<country>Nigeria</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,University of Calabar Faculty of Physical Sciences Department of Physics]]></institution>
<addr-line><![CDATA[Calabar ]]></addr-line>
<country>Nigeria</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,University of Calabar Faculty of Physical Sciences Department of Pure and Applied Chemistry]]></institution>
<addr-line><![CDATA[Calabar ]]></addr-line>
<country>Nigeria</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,University of Nigeria Faculty of Physical Sciences Department of Physics and Astronomy]]></institution>
<addr-line><![CDATA[Nsukka Enugu State]]></addr-line>
<country>Nigeria</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,University of Calabar Faculty of Allied Medicine Department of Radiography and Radiological sciences]]></institution>
<addr-line><![CDATA[Calabar ]]></addr-line>
<country>Nigeria</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,University of Calabar Faculty of Environmental Sciences Department of Geography and Environmental Sciences]]></institution>
<addr-line><![CDATA[Calabar ]]></addr-line>
<country>Nigeria</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<volume>69</volume>
<numero>3</numero>
<fpage>0</fpage>
<lpage>0</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2023000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2023000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2023000300007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Novel ternary nanocomposite films based on polyvinylpyrrolidone copper nanoparticles graphene oxide (PVP/Cu/GO) were prepared using electrochemical deposition technique on Fluorine doped tin oxide (FTO) substrate. This facile and effective approach has been proven to be very useful for the fabrication of inexpensive, high-performance electrochemical devices. To achieve uniform deposition of the nanocomposite films, the three components of the nanocomposites were mixed under controlled conditions. The impact of different GO loading on the PVP/Cu/GO composites was measured using ultraviolet-visible spectrophotometry (UV-vis), X-Ray Diffraction (XRD) spectroscopy, scanning electron microscopy (SEM), Energy dispersive X-ray spectroscopy (EDX), and four-point probe techniques to evaluate their optical, structural, morphological, compositional, and electrical properties, respectively. UV-visible analysis shows that the optical band gap (E  g ) of the nanocomposite decreased from 3.51 to 2.02 eV with increasing GO loading. All of the nanocomposites showed UV absorbance of &#8776; 450 nm. According to the XRD results, the GO materials were very well dispersed in the PVP/Cu/GO composites, while also revealing the crystalline nature of the nanocomposites. The SEM results revealed spherical-shaped grains of the deposited films, while the EDX results revealed the major elements deposited. Four-point probe analysis of the nanocomposites revealed slight increase in conductivity with low GO content, thus confirming the semiconducting properties of the nanocomposites with the GO content. The obtained results herein shows that the PVP/Cu/GO nanocomposites are successfully synthesized with attractive physiochemical properties suitable for the fabrication of organic electronic devices and photovoltaic devices.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Graphene oxide]]></kwd>
<kwd lng="en"><![CDATA[polymer]]></kwd>
<kwd lng="en"><![CDATA[polyvinylpyrrolidone]]></kwd>
<kwd lng="en"><![CDATA[nanocomposites]]></kwd>
</kwd-group>
</article-meta>
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