2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 4. Mamalis Intl. Symp. / Advanced Manufacturing
| Editors: | F. Kongoli, A. G. Mamalis, K. Hokamoto |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2018 |
| Pages: | 352 pages |
| ISBN: | 978-1-987820-88-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Au@Pt Core-Shell Nanoparticles with Nanostructured Dendritic Pt Shells as Solid Contacts in Ion Selective Electrodes
Masoumeh Saber Zaeimian1; Anthony Piazza1; Athanasios G. Mamalis2; Xiaoshan Zhu1; Li Wan3;1UNIVERSITY OF NEVADA, RENO, Reno, United States; 2PC-NAE, DEMOKRITOS NATIONAL CENTER FOR SCIENTIFIC RESEARCH, Athens, Greece; 3WENZHOU UNIVERSITY, Wenzhou, China;
Type of Paper: Regular
Id Paper: 205
Topic: 48
Abstract:
Ion-selective electrodes (ISEs) have been widely used in chemical or clinical analysis for the detection of various ions. Conventional ISEs are fabricated with an ion selective membrane in contact with an inner solution. The inner solution causes short lifetimes of ISEs, complex assembly and maintenance, and difficulties in ISE further miniaturization. Instead of an inner solution, ISEs with an internal solid contact (SC) have been recognized as the next generation of ISEs because they possess important merits in easy miniaturization, simple fabrication and ruggedness [1-2]. Different materials ranging from conducting polymers through to inorganic nanomaterials/nanostructures (e.g., carbon, gold) have been applied as SC for ISEs.
In this work, to the best of our knowledge, it is the first time to report using Au@Pt core-shell nanoparticles with nanostructured dendritic Pt shells as an active ion-to-electron transducer layer (or solid contacts) for ISEs. Compared to other reported inorganic nanomaterials/nanostructures, the Au@Pt core-shell nanoparticles possess large and electron-state-rich surfaces for high electrochemical activity, ease synthesis by simply mixing chemical reagents in room temperature, and high stability in environments due to inert noble metal compositions. We anticipate that the merits of the Au@Pt core-shell nanoparticles will enhance the ISE performance in fast response, sensing stability against many interferences, low limit of detection, and wide linear detection range.
Specifically, ISE using these nanoparticles for ammonium detection is developed. Ammonium is one of important biological nutrients in soil or environmental water and critical for the plant growth or the blooming/fading of microbiome in water. This ISE can be used for the identification and management of the nutrients for soil/water quality monitoring [3]. Moreover, ammonium is present in blood mostly as a result of the breakdown of proteins [4]. Therefore, the ISE can be used to determine the levels of this cation in plasma and thus to provide extremely relevant physiological information related to the metabolic state of the individual, dietary conditions, or even liver malfunctions. Although our ISE currently is developed on a glassy carbon rod, it can be developed on any flexible substrates for further wearable applications (e.g., detecting ammonium in sweat).
Keywords:
Biomedical engineering; Environment; Nanoparticles; Nanostructured materials; Nanotechnology/Nanomaterials manufacturing; Polymers;References:
[1] B. P. Nikolskii, E. A. Materova, Ion-Selective Electrode Reviews, 1985, 7, 3-39.[2] Michalska A, Electroanalysis, 2012, 24, 1253-1265.
[3] K. Sato, W. H. Kang, K. Saga and K. T. Sato, J. Am. Acad. Dermatol., 1989, 20, 537-563.
[4] R. Athavale, I. Kokorite, et al., Anal. Chem., 2015, 87, pp 11990-11997.