<?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>0121-4470</journal-id>
<journal-title><![CDATA[Momento]]></journal-title>
<abbrev-journal-title><![CDATA[Momento]]></abbrev-journal-title>
<issn>0121-4470</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-44702021000200001</article-id>
<article-id pub-id-type="doi">10.15446/mo.n63.91515</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[EFFECT OF THE MAGNETIC FIELD ON THE SYNTHESIS OF COLLOIDAL SILVER AND GOLD NANOPARTICLES BY LASER ABLATION IN BIDESTILATED WATER]]></article-title>
<article-title xml:lang="es"><![CDATA[EFECTO DEL CAMPO MAGNETICO EN LA SINTESIS DE NANOPARTICULAS DE ORO Y PLATA COLOIDAL POR ABLACIÓN LASER EN AGUA BIDESTILADA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valverde-Alva]]></surname>
<given-names><![CDATA[Miguel A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Agreda-Delgado]]></surname>
<given-names><![CDATA[Jhenry F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vega-González]]></surname>
<given-names><![CDATA[Juan A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soto]]></surname>
<given-names><![CDATA[Juan C. Rodríguez-]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Idrogo-Córdova]]></surname>
<given-names><![CDATA[Julio C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Angelats-Silva]]></surname>
<given-names><![CDATA[Luis M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aldama-Reyna]]></surname>
<given-names><![CDATA[Claver W.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Trujillo Facultad de Ciencias Físicas y Matemáticas Departamento Académico de Física]]></institution>
<addr-line><![CDATA[Trujillo ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Trujillo Facultad de Ingeniería Departamento de Ingeniería Metalúrgica]]></institution>
<addr-line><![CDATA[Trujillo ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Trujillo Facultad de Ciencias Biológicas Laboratorio de Citometría]]></institution>
<addr-line><![CDATA[Trujillo ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Privada Antenor Orrego Laboratorio de investigación multidisciplinaria (LABINM) ]]></institution>
<addr-line><![CDATA[Trujillo ]]></addr-line>
<country>Peru</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<numero>63</numero>
<fpage>1</fpage>
<lpage>11</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-44702021000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-44702021000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-44702021000200001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The effect of the magnetic field of 0.3 T on the concentration, distribution of sizes in suspension, and zeta potential of colloidal gold and colloidal silver nanoparticles, obtained by considering the pulsed laser ablation in double distilled water was studied. The magnetic field was transverse to the direction of incidence of the laser radiation and parallel to the surface of a submerged target. An Nd: YAG laser was used (1064 nm in wavelength, 10 ns in duration, a repetition rate of 10 Hz, and 37 mJ of energy) to ablate targets. The colloids were characterized by inductively coupled plasma optical emission spectroscopy, ultraviolet-visible spectroscopy, dynamic light scattering, and zeta potential. Concentration analysis suggested that applying a magnetic field of 0.3 T during nanoparticle synthesis leads to higher concentration. Applying magnetic field led to an eleven percent increase in the concentration of the colloid with gold nanoparticles and a five percent increase in the concentration of the colloidal silver nanoparticles. The absorption spectra suggested the presence of spherical nanoparticles. When analyzing the effect of the magnetic field on the hydrodynamic size distribution of the nanoparticles and the zeta potential of the colloids, no significant changes were evidenced. The magnetic confinement of the plasma-induced by laser ablation caused changes in the characteristics of the colloids.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se estudió el efecto del campo magnético (0.3 T) sobre la concentración, distribución de tamaños en suspensión y potencial zeta de nanopartículas coloidales de oro y plata, obtenidas al considerar la técnica de ablación láser pulsada en agua bidestilada. El campo magnético fue transversal a la dirección de incidencia de la radiación láser y paralelo a la superficie del blanco sumergido. Se utilizó un laser Nd:YAG, emitiendo pulsos de 1064 nm de longitud de onda, 10 ns de duración, razón de repetición de 10 Hz y 37 mJ de energía. Los coloides fueron caracterizados al considerar las técnicas: espectroscopia de emisión por plasma de acoplamiento inductivo, espectroscopia ultravioleta-visible, esparcimiento dinámico de luz y potencial zeta. Los análisis de concentración demostraron que aplicar campo magnético de 0.3 T durante la síntesis de nanopartículas conlleva a obtener mayor concentración. Aplicar campo magnético conllevó a incrementar en once por ciento la concentración del coloide con nanopartículas de oro y en cinco por ciento la concentración del coloide con nanopartículas de plata. Los espectros de absorción obtenidos son característicos de nanopartículas esféricas. Al analizar el efecto del campo magnético en la distribución de tamaños hidrodinámicos de las nanopartículas y en el potencial zeta, no se evidenció cambios significativos. El confinamiento magnético del plasma inducido por ablación láser ocasionó cambios en las características de los coloides.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Laser ablation in liquids]]></kwd>
<kwd lng="en"><![CDATA[magnetic confinement]]></kwd>
<kwd lng="en"><![CDATA[nanoparticles concentration]]></kwd>
<kwd lng="es"><![CDATA[Ablación laser en líquidos]]></kwd>
<kwd lng="es"><![CDATA[confinamiento magnético]]></kwd>
<kwd lng="es"><![CDATA[concentración de nanopartículas]]></kwd>
</kwd-group>
</article-meta>
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