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Electrosynthesis an...
Electrosynthesis and characterization of gold nanoparticles for electronic capacitance sensing of pollutants
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- Cioffi, Nicola (author)
- University Bari Aldo Moro, Italy
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- Colaianni, Lorenzo (author)
- Schaefer S E Europe SRL Italy
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- Ieva, Eliana (author)
- Solvay Solexis SpA
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- Pilolli, Rosa (author)
- University Bari Aldo Moro, Italy
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- Ditaranto, Nicoletta (author)
- University Bari Aldo Moro, Italy
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- Daniela Angione, Maria (author)
- University Bari Aldo Moro, Italy
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- Cotrone, Serafina (author)
- University Bari Aldo Moro, Italy
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- Buchholt, Kristina (author)
- Linköpings universitet,Tillämpad Fysik,Tekniska högskolan
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- Lloyd Spetz, Anita (author)
- Linköpings universitet,Tillämpad Fysik,Tekniska högskolan
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- Sabbatini, Luigia (author)
- University Bari Aldo Moro, Italy
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- Torsi, Luisa (author)
- University Bari Aldo Moro, Italy
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(creator_code:org_t)
- Elsevier Science B.V., Amsterdam. 2011
- 2011
- English.
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In: Electrochimica Acta. - : Elsevier Science B.V., Amsterdam.. - 0013-4686 .- 1873-3859. ; 56:10, s. 3713-3720
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Abstract
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- In the present study, gold/surfactant core/shell colloidal nanoparticles with a controlled morphology and chemical composition have been obtained via the so-called sacrificial anode technique, carried out in galvanostatic mode. As synthesized Au-NPs had an average core diameter comprised between 4 and 8 nm, as a function of the electrochemical process experimental conditions. The UV-Vis characterization of gold nanocolloids showed clear spectroscopic size effects, affecting both the position and width of the nanoparticle surface plasmon resonance peak. The nanomaterial surface spectroscopic characterization showed the presence of two chemical states, namely nanostructured Au(0) (its abundance being higher than 90%) and Au(I). Au-NPs were then deposited on the top of a capacitive field effect sensor and subjected to a mild thermal annealing aiming at removing the excess of stabilizing surfactant molecules. Au-NP sensors were tested towards some gases found in automotive gas exhausts. The sensing device showed the largest response towards NOx, and much smaller - if any - responses towards interferent species such as NH3, H-2, CO, and hydrocarbons.
Keyword
- Gold nanoparticle
- NOx sensing
- XPS
- Spectroscopic size effects
- SAE
- TECHNOLOGY
- TEKNIKVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
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Cioffi, Nicola
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Colaianni, Loren ...
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Ieva, Eliana
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Pilolli, Rosa
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Ditaranto, Nicol ...
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Daniela Angione, ...
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Cotrone, Serafin ...
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Buchholt, Kristi ...
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Lloyd Spetz, Ani ...
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Sabbatini, Luigi ...
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Torsi, Luisa
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- Articles in the publication
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Electrochimica A ...
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Linköping University