<?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>S0035-001X2011000300010</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[&#947;-Fe2O3/ZnO composite particles prepared by a two step chemical soft method]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Romero]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales Leal]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Investigaciones en Materiales ]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2011</year>
</pub-date>
<volume>57</volume>
<numero>3</numero>
<fpage>236</fpage>
<lpage>240</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2011000300010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2011000300010&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2011000300010&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Composite iron oxide-Zinc oxide (&#947;-Fe2O3/ZnO) was synthesized by two step method: in the first one step &#947;-Fe2O3 particles were obtained by a cetyltrimethylammonium hydroxide (CTAOH) assisted hydrothermal method at low temperature (60°C). In the second step, the &#947;-Fe2O3 particles were included in the ZnO particles synthesis, which were obtained by a hexamethylenetetramine (HMTA) assisted hydrothermal method at low temperature (90° C). SEM study of the samples revealed that the &#947;-Fe2O3/ZnO composites present a compact morphology. The &#947;-Fe2O3 and ZnO phases were identified by XRD, energy dispersive X-ray analysis (EDX) and analysis of the IR spectrum. The composite exhibit the characteristic emissions of ZnO under UV radiation and ferromagnetic behavior of &#947;-Fe2O3 under an external magnetic field.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[En este trabajo el compuesto formado entre el óxido de hierro y el óxido de zinc (&#947;-Fe2O3/ZnO) fue sintetizado por el método sol-gel en dos pasos: en el primer paso partículas del óxido de hierro &#947;-Fe2O3 fueron obtenidas por el método hidrotérmico asistido con hidróxido de cetiltrimetilamonio (CTAOH) a baja temperatura (60°C). En el segundo paso, las partículas del óxido &#947;-Fe2O3 fueron incluidas en la síntesis de las partículas de ZnO las cuales fueron obtenidas por el método hidrotérmico asistido con hexametilentetramina HMTA) a una temperatura de 90°C. El análisis SEM de las muestra revele) que las partículas del compuesto &#947;-Fe2O3/ZnO presentan una morfología redonda compacta. Las fases &#947;-Fe2O3 y ZnO fueron identificadas por XRD, análisis de rayos x con energía dispersiva (EDX), y análisis de espectro IR. El compuesto exibe emisión característica del ZnO bajo radiación UV y comportamiento ferromagnético del &#947;-Fe2O3 bajo un campo magnético.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Iron oxides]]></kwd>
<kwd lng="en"><![CDATA[zinc oxides]]></kwd>
<kwd lng="en"><![CDATA[hydrothermal method]]></kwd>
<kwd lng="en"><![CDATA[composites]]></kwd>
<kwd lng="es"><![CDATA[Óxido de hierro]]></kwd>
<kwd lng="es"><![CDATA[óxido de zinc]]></kwd>
<kwd lng="es"><![CDATA[método hidrotérmico]]></kwd>
<kwd lng="es"><![CDATA[materiales compuestos]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p> 	    <p align="center"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="center"><font face="verdana" size="4"><b>&#947;&#150;Fe<sub>2</sub>O<sub>3</sub>/ZnO composite particles prepared by a two step chemical soft method</b></font></p> 	    <p align="center"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="center"><font face="verdana" size="2"><b>S. L&oacute;pez&#150;Romero and F. Morales Leal</b></font></p> 	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="justify"><font face="verdana" size="2"><i>Instituto de Investigaciones en Materiales, Universidad Nacional Aut&oacute;noma de M&eacute;xico, Apartado Postal 70&#150;360, M&eacute;xico D.F., 04510, M&eacute;xico, e&#150;mails:</i> <a href="mailto:sebas@servidor.unam.mx">sebas@servidor.unam.mx</a>; <a href="mailto:fmleal@servidor.unam.mx">fmleal@servidor.unam.mx</a>.</font></p> 	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="justify"><font face="verdana" size="2">Recibido el 3 de febrero de 2011    ]]></body>
<body><![CDATA[<br> 	Aceptado el 8 de abril de 2011</font></p> 	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p> 	    <p align="justify"><font face="verdana" size="2">Composite iron oxide&#150;Zinc oxide  (&#947;&#150;Fe<sub>2</sub>O<sub>3</sub>/ZnO) was synthesized by two step method: in the first one step &#947;&#150;Fe<sub>2</sub>O<sub>3</sub> particles were obtained by a cetyltrimethylammonium hydroxide (CTAOH) assisted hydrothermal method at low temperature (60&deg;C). In the second step, the &#947;&#150;Fe<sub>2</sub>O<sub>3</sub> particles were included in the ZnO particles synthesis, which were obtained by a hexamethylenetetramine (HMTA) assisted hydrothermal method at low temperature (90&deg; C). SEM study of the samples revealed that the &#947;&#150;Fe<sub>2</sub>O<sub>3</sub>/ZnO composites present a compact morphology. The &#947;&#150;Fe<sub>2</sub>O<sub>3</sub> and ZnO phases were identified by XRD, energy dispersive X&#150;ray analysis (EDX) and analysis of the IR spectrum. The composite exhibit the characteristic emissions of ZnO under UV radiation and ferromagnetic behavior of &#947;&#150;Fe<sub>2</sub>O<sub>3</sub> under an external magnetic field.</font></p> 	    <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> Iron oxides; zinc oxides; hydrothermal method; composites.</font></p> 	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p> 	    <p align="justify"><font face="verdana" size="2">En este trabajo el compuesto formado entre el &oacute;xido de hierro y el &oacute;xido de zinc (&#947;&#150;Fe<sub>2</sub>O<sub>3</sub>/ZnO) fue sintetizado por el m&eacute;todo sol&#150;gel en dos pasos: en el primer paso part&iacute;culas del &oacute;xido de hierro &#947;&#150;Fe<sub>2</sub>O<sub>3</sub> fueron obtenidas por el m&eacute;todo hidrot&eacute;rmico asistido con hidr&oacute;xido de cetiltrimetilamonio (CTAOH) a baja temperatura (60&deg;C). En el segundo paso, las part&iacute;culas del &oacute;xido &#947;&#150;Fe<sub>2</sub>O<sub>3</sub> fueron incluidas en la s&iacute;ntesis de las part&iacute;culas de ZnO las cuales fueron obtenidas por el m&eacute;todo hidrot&eacute;rmico asistido con hexametilentetramina HMTA) a una temperatura de 90&deg;C. El an&aacute;lisis SEM de las muestra revele) que las part&iacute;culas del compuesto &#947;&#150;Fe<sub>2</sub>O<sub>3</sub>/ZnO presentan una morfolog&iacute;a redonda compacta. Las fases &#947;&#150;Fe<sub>2</sub>O<sub>3</sub> y ZnO fueron identificadas por XRD, an&aacute;lisis de rayos x con energ&iacute;a dispersiva (EDX), y an&aacute;lisis de espectro IR. El compuesto exibe emisi&oacute;n caracter&iacute;stica del ZnO bajo radiaci&oacute;n UV y comportamiento ferromagn&eacute;tico del &#947;&#150;Fe<sub>2</sub>O<sub>3</sub> bajo un campo magn&eacute;tico.</font></p> 	    <p align="justify"><font face="verdana" size="2"><b>Descriptores:</b> &Oacute;xido de hierro; &oacute;xido de zinc; m&eacute;todo hidrot&eacute;rmico; materiales compuestos.</font></p> 	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">PACS: 81.05Mh</font></p> 	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v57n3/v57n3a10.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p> 	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="justify"><font face="verdana" size="2"><b>Acknowledgements</b></font></p> 	    <p align="justify"><font face="verdana" size="2">The author gratefully acknowledge useful contribution with L. Ba&ntilde;os and Adriana Tejeda for his support in carrying out x&#150;ray study, Omar Novelo for their support in electron microscopy characterization and Miguel A. Canseco for his support in carrying out IR study.</font></p> 	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p> 	    <p align="justify"><font face="verdana" size="2"><b>References</b></font></p> 	    <!-- ref --><p align="justify"><font face="verdana" size="2">1. Hongwei Gu <i>et al, J. Am. Chem. Soc.</i> <b>126</b> (2004) 5664.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8368104&pid=S0035-001X201100030001000001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p> 	    ]]></body>
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