TY - JOUR
T1 - Tuning the electrical properties of colloidal nanoalloys by varying their composition
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.
KW - Colloidal nanoalloys
KW - Conductivity
KW - Electrical properties
KW - Impedance spectroscopy
KW - Permittivity
UR - http://www.scopus.com/inward/record.url?scp=85124908477&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2022.128496
DO - 10.1016/j.colsurfa.2022.128496
M3 - Article
AN - SCOPUS:85124908477
SN - 0927-7757
VL - 641
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
M1 - 128496
ER -