Tuning the electrical properties of colloidal nanoalloys by varying their composition

Affi N. Hidayah; Yuliati Herbani; Eden Steven; Achmad Subhan; Djoko Triyono; Isnaeni; Maria M. Suliyanti; Muhandis Shiddiq

doi:10.1016/j.colsurfa.2022.128496

Tuning the electrical properties of colloidal nanoalloys by varying their composition

Affi N. Hidayah, Yuliati Herbani, Eden Steven, Achmad Subhan, Djoko Triyono, Isnaeni, Maria M. Suliyanti, Muhandis Shiddiq

Department of Physics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Colloidal nanoalloys have been shown to have combined advantageous properties of their metallic constituents. However, the research on the electrical properties of colloidal nanoalloys is still lacking. We report an electrical properties study of gold-silver nanoalloys of various compositions suspended in Milli-Q water using impedance spectroscopy. We model the impedance spectra with an equivalent electrical circuit that consists of a constant phase element (CPE) in series with a parallel of a resistor and a capacitor. Through this model, we can extract information about the conductivity, relative permittivity, and electrode/solution interface properties of the colloidal nanoalloys. We have found that the conductivity and relative permittivity increase almost linearly with the increase of gold molar fraction in the solution. This means that the electrical properties of colloidal nanoalloys can be easily tuned by varying their composition. A possible direct application of these findings is for tailoring nanoparticles as contrast agents in applications such as electrical impedance tomography.

Original language	English
Article number	128496
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	641
DOIs	https://doi.org/10.1016/j.colsurfa.2022.128496
Publication status	Published - 20 May 2022

Keywords

Colloidal nanoalloys
Conductivity
Electrical properties
Impedance spectroscopy
Permittivity

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10.1016/j.colsurfa.2022.128496

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title = "Tuning the electrical properties of colloidal nanoalloys by varying their composition",

abstract = "Colloidal nanoalloys have been shown to have combined advantageous properties of their metallic constituents. However, the research on the electrical properties of colloidal nanoalloys is still lacking. We report an electrical properties study of gold-silver nanoalloys of various compositions suspended in Milli-Q water using impedance spectroscopy. We model the impedance spectra with an equivalent electrical circuit that consists of a constant phase element (CPE) in series with a parallel of a resistor and a capacitor. Through this model, we can extract information about the conductivity, relative permittivity, and electrode/solution interface properties of the colloidal nanoalloys. We have found that the conductivity and relative permittivity increase almost linearly with the increase of gold molar fraction in the solution. This means that the electrical properties of colloidal nanoalloys can be easily tuned by varying their composition. A possible direct application of these findings is for tailoring nanoparticles as contrast agents in applications such as electrical impedance tomography.",

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author = "Hidayah, {Affi N.} and Yuliati Herbani and Eden Steven and Achmad Subhan and Djoko Triyono and Isnaeni and Suliyanti, {Maria M.} and Muhandis Shiddiq",

note = "Funding Information: This work was supported by Indonesian Institute of Sciences (LIPI) , Indonesia, LIPI National Research Program (Decision of The Deputy of Scientific Services of LIPI No. 114/A/DJ/2020 ) and LIPI Flagship National Research Incentives (Contract No. 038/P/RPL-LIPI/INSINAS-1/ II/2019 ). Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

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doi = "10.1016/j.colsurfa.2022.128496",

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AU - Hidayah, Affi N.

AU - Herbani, Yuliati

AU - Steven, Eden

AU - Subhan, Achmad

AU - Triyono, Djoko

AU - Isnaeni,

AU - Suliyanti, Maria M.

AU - Shiddiq, Muhandis

N1 - Funding Information: This work was supported by Indonesian Institute of Sciences (LIPI) , Indonesia, LIPI National Research Program (Decision of The Deputy of Scientific Services of LIPI No. 114/A/DJ/2020 ) and LIPI Flagship National Research Incentives (Contract No. 038/P/RPL-LIPI/INSINAS-1/ II/2019 ). Publisher Copyright: © 2022 Elsevier B.V.

PY - 2022/5/20

Y1 - 2022/5/20

N2 - Colloidal nanoalloys have been shown to have combined advantageous properties of their metallic constituents. However, the research on the electrical properties of colloidal nanoalloys is still lacking. We report an electrical properties study of gold-silver nanoalloys of various compositions suspended in Milli-Q water using impedance spectroscopy. We model the impedance spectra with an equivalent electrical circuit that consists of a constant phase element (CPE) in series with a parallel of a resistor and a capacitor. Through this model, we can extract information about the conductivity, relative permittivity, and electrode/solution interface properties of the colloidal nanoalloys. We have found that the conductivity and relative permittivity increase almost linearly with the increase of gold molar fraction in the solution. This means that the electrical properties of colloidal nanoalloys can be easily tuned by varying their composition. A possible direct application of these findings is for tailoring nanoparticles as contrast agents in applications such as electrical impedance tomography.

AB - Colloidal nanoalloys have been shown to have combined advantageous properties of their metallic constituents. However, the research on the electrical properties of colloidal nanoalloys is still lacking. We report an electrical properties study of gold-silver nanoalloys of various compositions suspended in Milli-Q water using impedance spectroscopy. We model the impedance spectra with an equivalent electrical circuit that consists of a constant phase element (CPE) in series with a parallel of a resistor and a capacitor. Through this model, we can extract information about the conductivity, relative permittivity, and electrode/solution interface properties of the colloidal nanoalloys. We have found that the conductivity and relative permittivity increase almost linearly with the increase of gold molar fraction in the solution. This means that the electrical properties of colloidal nanoalloys can be easily tuned by varying their composition. A possible direct application of these findings is for tailoring nanoparticles as contrast agents in applications such as electrical impedance tomography.

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Tuning the electrical properties of colloidal nanoalloys by varying their composition

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