Removal of Thiol-SAM on a Gold Surface for Re-Use of an Interdigitated Chain-Shaped Electrode
The self-assembled monolayer (SAM) is the most common organic assembly utilized for the formation of the monolayers of alkane-thiolates on gold electrode, resulting in a wide range of applications for the modified SAM on gold in various research areas. This study examined the desorption of a SAM tha...
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MDPI AG
2022-03-01
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| author | Hien T. Ngoc Le Le Minh Tu Phan Sungbo Cho |
| author_facet | Hien T. Ngoc Le Le Minh Tu Phan Sungbo Cho |
| author_sort | Hien T. Ngoc Le |
| collection | DOAJ |
| description | The self-assembled monolayer (SAM) is the most common organic assembly utilized for the formation of the monolayers of alkane-thiolates on gold electrode, resulting in a wide range of applications for the modified SAM on gold in various research areas. This study examined the desorption of a SAM that was developed on the gold surface of an interdigitated chain-shaped electrode (the ICE, a unique electrode design, was fabricated by our group) with the goal of determining the most efficient strategy of SAM removal for the ICE to be re-used. A simple and proficient solution-based cleaning procedure was applied for the removal of a SAM on the gold surface of the ICE by using a sodium borohydride solution within short-term treatment, resulting in efficiency for the recovery of the originally electrochemical characteristic of ICE of 90.3%. The re-use of ICE after the removal process was confirmed by the successful re-deposition of a SAM onto the electrode surface, resulting in the high efficiency percentage of 90.1% for the reusability of ICE with the SAM modification. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used as tools to investigate the changes in the electrode interface at each stage of the SAM removal and the electrode recycling. X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were employed, being powerful spectrum techniques, for the characterization of the bonding structure and chemical state of the bare ICE and the modified ICE at each treatment step. Based on the comprehensive discussion of analytical chemistry from the obtained EIS and CV data in this study, we confirmed and proved the effectiveness of this promising method for the removal of a SAM from the ICE and the re-use of ICE in the field of material deposition, with the aims of saving money, improving experimental handling, and protecting the environment. |
| first_indexed | 2024-03-09T13:27:51Z |
| format | Article |
| id | doaj.art-0a39e99a901b4551a2455a075801662c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T13:27:51Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-0a39e99a901b4551a2455a075801662c2023-11-30T21:21:21ZengMDPI AGMaterials1996-19442022-03-01156221810.3390/ma15062218Removal of Thiol-SAM on a Gold Surface for Re-Use of an Interdigitated Chain-Shaped ElectrodeHien T. Ngoc Le0Le Minh Tu Phan1Sungbo Cho2Department of Electronic Engineering, Gachon University, Seongnam-si 13120, KoreaSchool of Medicine and Pharmacy, The University of Danang, Danang 550000, VietnamDepartment of Electronic Engineering, Gachon University, Seongnam-si 13120, KoreaThe self-assembled monolayer (SAM) is the most common organic assembly utilized for the formation of the monolayers of alkane-thiolates on gold electrode, resulting in a wide range of applications for the modified SAM on gold in various research areas. This study examined the desorption of a SAM that was developed on the gold surface of an interdigitated chain-shaped electrode (the ICE, a unique electrode design, was fabricated by our group) with the goal of determining the most efficient strategy of SAM removal for the ICE to be re-used. A simple and proficient solution-based cleaning procedure was applied for the removal of a SAM on the gold surface of the ICE by using a sodium borohydride solution within short-term treatment, resulting in efficiency for the recovery of the originally electrochemical characteristic of ICE of 90.3%. The re-use of ICE after the removal process was confirmed by the successful re-deposition of a SAM onto the electrode surface, resulting in the high efficiency percentage of 90.1% for the reusability of ICE with the SAM modification. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used as tools to investigate the changes in the electrode interface at each stage of the SAM removal and the electrode recycling. X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were employed, being powerful spectrum techniques, for the characterization of the bonding structure and chemical state of the bare ICE and the modified ICE at each treatment step. Based on the comprehensive discussion of analytical chemistry from the obtained EIS and CV data in this study, we confirmed and proved the effectiveness of this promising method for the removal of a SAM from the ICE and the re-use of ICE in the field of material deposition, with the aims of saving money, improving experimental handling, and protecting the environment.https://www.mdpi.com/1996-1944/15/6/2218interdigitated chain-shaped electrodeself-assembled monolayerSAM removalelectrochemical impedance spectroscopy |
| spellingShingle | Hien T. Ngoc Le Le Minh Tu Phan Sungbo Cho Removal of Thiol-SAM on a Gold Surface for Re-Use of an Interdigitated Chain-Shaped Electrode Materials interdigitated chain-shaped electrode self-assembled monolayer SAM removal electrochemical impedance spectroscopy |
| title | Removal of Thiol-SAM on a Gold Surface for Re-Use of an Interdigitated Chain-Shaped Electrode |
| title_full | Removal of Thiol-SAM on a Gold Surface for Re-Use of an Interdigitated Chain-Shaped Electrode |
| title_fullStr | Removal of Thiol-SAM on a Gold Surface for Re-Use of an Interdigitated Chain-Shaped Electrode |
| title_full_unstemmed | Removal of Thiol-SAM on a Gold Surface for Re-Use of an Interdigitated Chain-Shaped Electrode |
| title_short | Removal of Thiol-SAM on a Gold Surface for Re-Use of an Interdigitated Chain-Shaped Electrode |
| title_sort | removal of thiol sam on a gold surface for re use of an interdigitated chain shaped electrode |
| topic | interdigitated chain-shaped electrode self-assembled monolayer SAM removal electrochemical impedance spectroscopy |
| url | https://www.mdpi.com/1996-1944/15/6/2218 |
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