Study of negatronic device based on amorphous carbon/nickel nanocomposite
Identifieur interne : 000094 ( Main/Exploration ); précédent : 000093; suivant : 000095Study of negatronic device based on amorphous carbon/nickel nanocomposite
Auteurs : N. Ben Mansour [Tunisie] ; L. El Mir [Tunisie, Arabie saoudite]Source :
- Applied surface science [ 0169-4332 ] ; 2014.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Carbone, Nickel, Matériau composite.
English descriptors
- KwdEn :
Abstract
Composite based on pyrogallol and formaldehyde (PF) reached by NiO nanoparticles has been prepared using sol-gel method to obtain negatronic PF/Ni devices. The obtained materials were subjected to heat treatment under inert atmosphere at 650 °C for 2 h. The X-ray diffraction analysis (XRD) shows that PF sample was composed of amorphous material while PF/Ni XRD spectra exhibited the presence of metallic nickel characteristic lines. The transmission electron microscopy (TEM) images indicate that PF sample was formed by homogenous material, and metallic nickel nanoparticles sized around 30 nm were dispersed in the PF/Ni nanocomposite. dc I(V) characteristics indicate a symmetric and non-linear behavior and the presence of negative differential resistance (RDN) phase in the PF/Ni sample. The dc conductivity (σdc) can be explained by Variable Range Hopping (3D-VRH) conduction model in both samples. The ac conductance shows the dominance of hopping conduction mechanism in PF sample; however, the Correlated Barrier Hopping (CBH) model seems to be dominant in the PF/Ni nanocomposite. The Nyquist plots were used to identify an equivalent circuit with the aim to study the possible contribution of the grains and boundary grains to the samples conductivities.
Affiliations:
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El Mir</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Gabes University, Faculty of Sciences</s1><s2>Gabes, Gabes</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>Gabes, Gabes</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Al Imam Mohammad Ibn Saud Islamic University (IMSIU), College of Sciences, Department of Physics</s1><s2>Riyadh 11623</s2><s3>SAU</s3><sZ>2 aut.</sZ></inist:fA14><country>Arabie saoudite</country><wicri:noRegion>Riyadh 11623</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">14-0167066</idno><date when="2014">2014</date><idno type="stanalyst">PASCAL 14-0167066 INIST</idno><idno type="RBID">Pascal:14-0167066</idno><idno type="wicri:Area/PascalFrancis/Corpus">000023</idno><idno type="wicri:Area/PascalFrancis/Curation">000418</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000008</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000008</idno><idno type="wicri:doubleKey">0169-4332:2014:Ben Mansour N:study:of:negatronic</idno><idno type="wicri:Area/Main/Merge">000095</idno><idno type="wicri:Area/Main/Curation">000094</idno><idno type="wicri:Area/Main/Exploration">000094</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Study of negatronic device based on amorphous carbon/nickel nanocomposite</title><author><name sortKey="Ben Mansour, N" sort="Ben Mansour, N" uniqKey="Ben Mansour N" first="N." last="Ben Mansour">N. Ben Mansour</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Gabes University, Faculty of Sciences</s1><s2>Gabes, Gabes</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>Gabes, Gabes</wicri:noRegion></affiliation></author><author><name sortKey="El Mir, L" sort="El Mir, L" uniqKey="El Mir L" first="L." last="El Mir">L. El Mir</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Gabes University, Faculty of Sciences</s1><s2>Gabes, Gabes</s2><s3>TUN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>Gabes, Gabes</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Al Imam Mohammad Ibn Saud Islamic University (IMSIU), College of Sciences, Department of Physics</s1><s2>Riyadh 11623</s2><s3>SAU</s3><sZ>2 aut.</sZ></inist:fA14><country>Arabie saoudite</country><wicri:noRegion>Riyadh 11623</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Applied surface science</title><title level="j" type="abbreviated">Appl. surf. sci.</title><idno type="ISSN">0169-4332</idno><imprint><date when="2014">2014</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Applied surface science</title><title level="j" type="abbreviated">Appl. surf. sci.</title><idno type="ISSN">0169-4332</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Amorphous state</term><term>Carbon</term><term>Composite materials</term><term>Nanocomposites</term><term>Nanostructured materials</term><term>Negative differential conductivity</term><term>Nickel</term><term>Sol-gel process</term><term>Transition elements</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Etat amorphe</term><term>Carbone</term><term>Métal transition</term><term>Nickel</term><term>Matériau composite</term><term>Nanomatériau</term><term>Nanocomposite</term><term>Procédé sol gel</term><term>Conductivité différentielle négative</term><term>C</term><term>Ni</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Carbone</term><term>Nickel</term><term>Matériau composite</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Composite based on pyrogallol and formaldehyde (PF) reached by NiO nanoparticles has been prepared using sol-gel method to obtain negatronic PF/Ni devices. The obtained materials were subjected to heat treatment under inert atmosphere at 650 °C for 2 h. The X-ray diffraction analysis (XRD) shows that PF sample was composed of amorphous material while PF/Ni XRD spectra exhibited the presence of metallic nickel characteristic lines. The transmission electron microscopy (TEM) images indicate that PF sample was formed by homogenous material, and metallic nickel nanoparticles sized around 30 nm were dispersed in the PF/Ni nanocomposite. dc I(V) characteristics indicate a symmetric and non-linear behavior and the presence of negative differential resistance (RDN) phase in the PF/Ni sample. The dc conductivity (σ<sub>dc</sub>) can be explained by Variable Range Hopping (3D-VRH) conduction model in both samples. The ac conductance shows the dominance of hopping conduction mechanism in PF sample; however, the Correlated Barrier Hopping (CBH) model seems to be dominant in the PF/Ni nanocomposite. The Nyquist plots were used to identify an equivalent circuit with the aim to study the possible contribution of the grains and boundary grains to the samples conductivities.</div></front></TEI><affiliations><list><country><li>Arabie saoudite</li><li>Tunisie</li></country></list><tree><country name="Tunisie"><noRegion><name sortKey="Ben Mansour, N" sort="Ben Mansour, N" uniqKey="Ben Mansour N" first="N." last="Ben Mansour">N. Ben Mansour</name></noRegion><name sortKey="El Mir, L" sort="El Mir, L" uniqKey="El Mir L" first="L." last="El Mir">L. El Mir</name></country><country name="Arabie saoudite"><noRegion><name sortKey="El Mir, L" sort="El Mir, L" uniqKey="El Mir L" first="L." last="El Mir">L. El Mir</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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