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A Greener Synthesis of Core (Fe, Cu)-Shell (Au, Pt, Pd, and Ag) Nanocrystals Using Aqueous Vitamin C

Identifieur interne : 007F93 ( Main/Repository ); précédent : 007F92; suivant : 007F94

A Greener Synthesis of Core (Fe, Cu)-Shell (Au, Pt, Pd, and Ag) Nanocrystals Using Aqueous Vitamin C

Auteurs : RBID : Pascal:08-0092587

Descripteurs français

Pascal (Inist)
- Structure coeur couche, Palladium, Nanocristal, Nanomatériau, Acide ascorbique, Métal transition, Nanoparticule, Agent surface, Microscopie électronique transmission, Diffraction électron sélection aire, Spectre UV visible, Catalyse, Biodétecteur, Fer, Cuivre, Or, Argent, Synthèse nanomatériau, In, 8116B, 8107B, Application technologique.
Wicri :
- concept : Fer, Cuivre, Or, Argent.

English descriptors

KwdEn :
- Ascorbic acid, Biosensors, Catalysis, Copper, Core shell structure, Gold, Iron, Nanocrystal, Nanomaterial synthesis, Nanoparticles, Nanostructured materials, Palladium, SAED, Silver, Surfactants, Technological application, Transition elements, Transmission electron microscopy, Ultraviolet visible spectrum.

Abstract

A greener method to fabricate novel core (Fe and Cu)-shell (noble metals) metal nanocrystals using aqueous ascorbic acid (vitamin C) is described. Transition metal salts such as Cu and Fe were reduced using ascorbic acid, a benign naturally available antioxidant, and then addition of noble metal salts resulted in the formation of the core-shell structure depending on the core and shell material used for the preparation. Pt yielded a tennis ball kind of structure with a Cu core, whereas Pd and Au formed regular spherical nanoparticles. Au, Pt, and Pd formed cube-shaped structures with Fe as the core. Inversely, transition metals with noble metals, such as Pd, as the core also formed interesting structures; these structures were brushlike with indium as the shell and needle-like when Cu was employed as the shell. The method is general uses no surfactant or capping agent and can be extended to noble metals as cores and transition metals as shells. The core-shell nanocrystals were characterized using transmission electron microscopy (TEM), selected area electron diffraction (SAED), and UV-vis spectroscopy. These nanocrystals have unique properties that are not originally present in either the core or shell materials and may have potential functions in catalysis, biosensors, energy storage systems, nanodevices, and ever-expanding other technological applications.

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Pascal:08-0092587

Le document en format XML

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<author><name sortKey="Nadagouda, Mallikarjuna N" uniqKey="Nadagouda M">Mallikarjuna N. Nadagouda</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Sustainable Technology Division, United States Environmental Protection Agency, National Risk Management Research Laboratory, 26 West Martin Luther King Drive, MS 443</s1>
<s2>Cincinnati, Ohio 45268</s2>
<s3>USA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
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<country>États-Unis</country>
<placeName><region type="state">État du Mississippi</region>
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</author>
<author><name sortKey="Varma, Rajender S" uniqKey="Varma R">Rajender S. Varma</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Sustainable Technology Division, United States Environmental Protection Agency, National Risk Management Research Laboratory, 26 West Martin Luther King Drive, MS 443</s1>
<s2>Cincinnati, Ohio 45268</s2>
<s3>USA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
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<country>États-Unis</country>
<placeName><region type="state">État du Mississippi</region>
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<publicationStmt><idno type="inist">08-0092587</idno>
<date when="2007">2007</date>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ascorbic acid</term>
<term>Biosensors</term>
<term>Catalysis</term>
<term>Copper</term>
<term>Core shell structure</term>
<term>Gold</term>
<term>Iron</term>
<term>Nanocrystal</term>
<term>Nanomaterial synthesis</term>
<term>Nanoparticles</term>
<term>Nanostructured materials</term>
<term>Palladium</term>
<term>SAED</term>
<term>Silver</term>
<term>Surfactants</term>
<term>Technological application</term>
<term>Transition elements</term>
<term>Transmission electron microscopy</term>
<term>Ultraviolet visible spectrum</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Structure coeur couche</term>
<term>Palladium</term>
<term>Nanocristal</term>
<term>Nanomatériau</term>
<term>Acide ascorbique</term>
<term>Métal transition</term>
<term>Nanoparticule</term>
<term>Agent surface</term>
<term>Microscopie électronique transmission</term>
<term>Diffraction électron sélection aire</term>
<term>Spectre UV visible</term>
<term>Catalyse</term>
<term>Biodétecteur</term>
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<front><div type="abstract" xml:lang="en">A greener method to fabricate novel core (Fe and Cu)-shell (noble metals) metal nanocrystals using aqueous ascorbic acid (vitamin C) is described. Transition metal salts such as Cu and Fe were reduced using ascorbic acid, a benign naturally available antioxidant, and then addition of noble metal salts resulted in the formation of the core-shell structure depending on the core and shell material used for the preparation. Pt yielded a tennis ball kind of structure with a Cu core, whereas Pd and Au formed regular spherical nanoparticles. Au, Pt, and Pd formed cube-shaped structures with Fe as the core. Inversely, transition metals with noble metals, such as Pd, as the core also formed interesting structures; these structures were brushlike with indium as the shell and needle-like when Cu was employed as the shell. The method is general uses no surfactant or capping agent and can be extended to noble metals as cores and transition metals as shells. The core-shell nanocrystals were characterized using transmission electron microscopy (TEM), selected area electron diffraction (SAED), and UV-vis spectroscopy. These nanocrystals have unique properties that are not originally present in either the core or shell materials and may have potential functions in catalysis, biosensors, energy storage systems, nanodevices, and ever-expanding other technological applications.</div>
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<fC01 i1="01" l="ENG"><s0>A greener method to fabricate novel core (Fe and Cu)-shell (noble metals) metal nanocrystals using aqueous ascorbic acid (vitamin C) is described. Transition metal salts such as Cu and Fe were reduced using ascorbic acid, a benign naturally available antioxidant, and then addition of noble metal salts resulted in the formation of the core-shell structure depending on the core and shell material used for the preparation. Pt yielded a tennis ball kind of structure with a Cu core, whereas Pd and Au formed regular spherical nanoparticles. Au, Pt, and Pd formed cube-shaped structures with Fe as the core. Inversely, transition metals with noble metals, such as Pd, as the core also formed interesting structures; these structures were brushlike with indium as the shell and needle-like when Cu was employed as the shell. The method is general uses no surfactant or capping agent and can be extended to noble metals as cores and transition metals as shells. The core-shell nanocrystals were characterized using transmission electron microscopy (TEM), selected area electron diffraction (SAED), and UV-vis spectroscopy. These nanocrystals have unique properties that are not originally present in either the core or shell materials and may have potential functions in catalysis, biosensors, energy storage systems, nanodevices, and ever-expanding other technological applications.</s0>
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A Greener Synthesis of Core (Fe, Cu)-Shell (Au, Pt, Pd, and Ag) Nanocrystals Using Aqueous Vitamin C

A Greener Synthesis of Core (Fe, Cu)-Shell (Au, Pt, Pd, and Ag) Nanocrystals Using Aqueous Vitamin C

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri