Microelectrode‐enabled Electrocrystallization of Cobalt TCNQ Complex for Gas Sensing
Abstract Electrocrystallization is a promising method for controlled charge‐transfer complex (CTC) deposition on microfabricated electrodes for gas sensing applications. However, there remains a gap in our understanding of CTC electrodeposition. In this study, we focus on investigating the electrocr...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2024-04-01
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| Series: | ChemElectroChem |
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| Online Access: | https://doi.org/10.1002/celc.202300826 |
| _version_ | 1797222099117408256 |
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| author | Jiancheng Lin Dr. Mohamed Kilani Dr. Mahroo Baharfar Dr. Jianbo Tang Jiewei Zheng Dr. Priyank V. Kumar Prof. Kourosh Kalantar‐Zadeh Prof. Guangzhao Mao |
| author_facet | Jiancheng Lin Dr. Mohamed Kilani Dr. Mahroo Baharfar Dr. Jianbo Tang Jiewei Zheng Dr. Priyank V. Kumar Prof. Kourosh Kalantar‐Zadeh Prof. Guangzhao Mao |
| author_sort | Jiancheng Lin |
| collection | DOAJ |
| description | Abstract Electrocrystallization is a promising method for controlled charge‐transfer complex (CTC) deposition on microfabricated electrodes for gas sensing applications. However, there remains a gap in our understanding of CTC electrodeposition. In this study, we focus on investigating the electrocrystallization of cobalt tetracyanoquinodimethane (Co‐TCNQ) on a microdisk electrode to elucidate and control the process. Leveraging the microelectrode technique, we conduct steady‐state measurements to observe nucleation and crystal growth dynamics, particularly in the early stages of electrocrystallization. We use cyclic voltammetry and chronoamperometry to examine Co‐TCNQ electrocrystallization under various electrolytic conditions. We identify electrocrystallization kinetics, ranging from electrokinetic to diffusion‐limited growth, governing the nucleation and growth of Co‐TCNQ crystals. Notably, we pinpoint the applied overpotential and precursor concentration range necessary for a single nucleation site on the microelectrode. Moreover, we demonstrate control over crystal orientation and morphology. Our findings reveal a nonclassical growth pathway for Co‐TCNQ crystals characterized by oriented attachment of small crystallites along the conductive long axis. Importantly, electrodeposited Co‐TCNQ on patterned microelectrodes exhibits selective sensing capabilities for nitrogen dioxide gas. Overall, this study sheds light on CTC electrodeposition through a proof‐of‐concept demonstration involving Co‐TCNQ electrodeposition on microelectrodes, presenting potential applications across diverse materials. |
| first_indexed | 2024-04-24T13:15:56Z |
| format | Article |
| id | doaj.art-5bb64c70d5334bf2a61e2ebc95e8fdf0 |
| institution | Directory Open Access Journal |
| issn | 2196-0216 |
| language | English |
| last_indexed | 2024-04-24T13:15:56Z |
| publishDate | 2024-04-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemElectroChem |
| spelling | doaj.art-5bb64c70d5334bf2a61e2ebc95e8fdf02024-04-04T17:37:38ZengWiley-VCHChemElectroChem2196-02162024-04-01117n/an/a10.1002/celc.202300826Microelectrode‐enabled Electrocrystallization of Cobalt TCNQ Complex for Gas SensingJiancheng Lin0Dr. Mohamed Kilani1Dr. Mahroo Baharfar2Dr. Jianbo Tang3Jiewei Zheng4Dr. Priyank V. Kumar5Prof. Kourosh Kalantar‐Zadeh6Prof. Guangzhao Mao7School of Chemical Engineering University of New South Wales (UNSW Sydney) Sydney New South Wales AustraliaSchool of Chemical Engineering University of New South Wales (UNSW Sydney) Sydney New South Wales AustraliaSchool of Chemical Engineering University of New South Wales (UNSW Sydney) Sydney New South Wales AustraliaSchool of Chemical Engineering University of New South Wales (UNSW Sydney) Sydney New South Wales AustraliaSchool of Chemical Engineering University of New South Wales (UNSW Sydney) Sydney New South Wales AustraliaSchool of Chemical Engineering University of New South Wales (UNSW Sydney) Sydney New South Wales AustraliaSchool of Chemical and Biomolecular Engineering The University of Sydney Sydney New South Wales AustraliaSchool of Chemical Engineering University of New South Wales (UNSW Sydney) Sydney New South Wales AustraliaAbstract Electrocrystallization is a promising method for controlled charge‐transfer complex (CTC) deposition on microfabricated electrodes for gas sensing applications. However, there remains a gap in our understanding of CTC electrodeposition. In this study, we focus on investigating the electrocrystallization of cobalt tetracyanoquinodimethane (Co‐TCNQ) on a microdisk electrode to elucidate and control the process. Leveraging the microelectrode technique, we conduct steady‐state measurements to observe nucleation and crystal growth dynamics, particularly in the early stages of electrocrystallization. We use cyclic voltammetry and chronoamperometry to examine Co‐TCNQ electrocrystallization under various electrolytic conditions. We identify electrocrystallization kinetics, ranging from electrokinetic to diffusion‐limited growth, governing the nucleation and growth of Co‐TCNQ crystals. Notably, we pinpoint the applied overpotential and precursor concentration range necessary for a single nucleation site on the microelectrode. Moreover, we demonstrate control over crystal orientation and morphology. Our findings reveal a nonclassical growth pathway for Co‐TCNQ crystals characterized by oriented attachment of small crystallites along the conductive long axis. Importantly, electrodeposited Co‐TCNQ on patterned microelectrodes exhibits selective sensing capabilities for nitrogen dioxide gas. Overall, this study sheds light on CTC electrodeposition through a proof‐of‐concept demonstration involving Co‐TCNQ electrodeposition on microelectrodes, presenting potential applications across diverse materials.https://doi.org/10.1002/celc.202300826crystal growthelectrochemistrynanostructuresnanotechnologysurface chemistry |
| spellingShingle | Jiancheng Lin Dr. Mohamed Kilani Dr. Mahroo Baharfar Dr. Jianbo Tang Jiewei Zheng Dr. Priyank V. Kumar Prof. Kourosh Kalantar‐Zadeh Prof. Guangzhao Mao Microelectrode‐enabled Electrocrystallization of Cobalt TCNQ Complex for Gas Sensing ChemElectroChem crystal growth electrochemistry nanostructures nanotechnology surface chemistry |
| title | Microelectrode‐enabled Electrocrystallization of Cobalt TCNQ Complex for Gas Sensing |
| title_full | Microelectrode‐enabled Electrocrystallization of Cobalt TCNQ Complex for Gas Sensing |
| title_fullStr | Microelectrode‐enabled Electrocrystallization of Cobalt TCNQ Complex for Gas Sensing |
| title_full_unstemmed | Microelectrode‐enabled Electrocrystallization of Cobalt TCNQ Complex for Gas Sensing |
| title_short | Microelectrode‐enabled Electrocrystallization of Cobalt TCNQ Complex for Gas Sensing |
| title_sort | microelectrode enabled electrocrystallization of cobalt tcnq complex for gas sensing |
| topic | crystal growth electrochemistry nanostructures nanotechnology surface chemistry |
| url | https://doi.org/10.1002/celc.202300826 |
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