Non-Ideal Cyclic Voltammetry of Redox Monolayers on Silicon Electrodes: Peak Splitting is Caused by Heterogeneous Photocurrents and Not by Molecular Disorder
Over the last three decades, research on redox-active monolayers has consolidated their importance as advanced functional material. For widespread monolayer systems, such as alkanethiols on gold, non-ideal multiple peaks in cyclic voltammetry are generally taken as indication of heterogeneous interm...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Language: | English |
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AMER CHEMICAL SOC
2022
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| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/DP190100735 http://hdl.handle.net/20.500.11937/91725 |
| _version_ | 1848765579603738624 |
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| author | Zhang, S. Lyu, X. Hurtado Torres, C. Darwish, Nadim Ciampi, Simone |
| author_facet | Zhang, S. Lyu, X. Hurtado Torres, C. Darwish, Nadim Ciampi, Simone |
| author_sort | Zhang, S. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Over the last three decades, research on redox-active monolayers has consolidated their importance as advanced functional material. For widespread monolayer systems, such as alkanethiols on gold, non-ideal multiple peaks in cyclic voltammetry are generally taken as indication of heterogeneous intermolecular interactions-namely, disorder in the monolayer. Our findings show that, contrary to metals, peak multiplicity of silicon photoelectrodes is not diagnostic of heterogeneous intermolecular microenvironments but is more likely caused by photocurrent being heterogeneous across the monolayer. This work is an important step toward understanding the cause of electrochemical non-idealities in semiconductor electrodes so that these can be prevented and the redox behavior of molecular monolayers, as photocatalytic systems, can be optimized. |
| first_indexed | 2025-11-14T11:37:30Z |
| format | Journal Article |
| id | curtin-20.500.11937-91725 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:37:30Z |
| publishDate | 2022 |
| publisher | AMER CHEMICAL SOC |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-917252023-05-30T08:14:58Z Non-Ideal Cyclic Voltammetry of Redox Monolayers on Silicon Electrodes: Peak Splitting is Caused by Heterogeneous Photocurrents and Not by Molecular Disorder Zhang, S. Lyu, X. Hurtado Torres, C. Darwish, Nadim Ciampi, Simone Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science POTENTIAL SWEEP VOLTAMMOGRAM TERMINATED MONOLAYERS ADSORBED MOLECULES GENERAL EXPRESSION SURFACE ELECTROCHEMISTRY FUNCTIONALIZATION CHEMISTRY COUPLES SINGLE Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science POTENTIAL SWEEP VOLTAMMOGRAM TERMINATED MONOLAYERS ADSORBED MOLECULES GENERAL EXPRESSION SURFACE ELECTROCHEMISTRY FUNCTIONALIZATION CHEMISTRY COUPLES SINGLE Over the last three decades, research on redox-active monolayers has consolidated their importance as advanced functional material. For widespread monolayer systems, such as alkanethiols on gold, non-ideal multiple peaks in cyclic voltammetry are generally taken as indication of heterogeneous intermolecular interactions-namely, disorder in the monolayer. Our findings show that, contrary to metals, peak multiplicity of silicon photoelectrodes is not diagnostic of heterogeneous intermolecular microenvironments but is more likely caused by photocurrent being heterogeneous across the monolayer. This work is an important step toward understanding the cause of electrochemical non-idealities in semiconductor electrodes so that these can be prevented and the redox behavior of molecular monolayers, as photocatalytic systems, can be optimized. 2022 Journal Article http://hdl.handle.net/20.500.11937/91725 10.1021/acs.langmuir.1c02723 English http://purl.org/au-research/grants/arc/DP190100735 http://purl.org/au-research/grants/arc/FT190100148 AMER CHEMICAL SOC fulltext |
| spellingShingle | Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science POTENTIAL SWEEP VOLTAMMOGRAM TERMINATED MONOLAYERS ADSORBED MOLECULES GENERAL EXPRESSION SURFACE ELECTROCHEMISTRY FUNCTIONALIZATION CHEMISTRY COUPLES SINGLE Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science POTENTIAL SWEEP VOLTAMMOGRAM TERMINATED MONOLAYERS ADSORBED MOLECULES GENERAL EXPRESSION SURFACE ELECTROCHEMISTRY FUNCTIONALIZATION CHEMISTRY COUPLES SINGLE Zhang, S. Lyu, X. Hurtado Torres, C. Darwish, Nadim Ciampi, Simone Non-Ideal Cyclic Voltammetry of Redox Monolayers on Silicon Electrodes: Peak Splitting is Caused by Heterogeneous Photocurrents and Not by Molecular Disorder |
| title | Non-Ideal Cyclic Voltammetry of Redox Monolayers on Silicon Electrodes: Peak Splitting is Caused by Heterogeneous Photocurrents and Not by Molecular Disorder |
| title_full | Non-Ideal Cyclic Voltammetry of Redox Monolayers on Silicon Electrodes: Peak Splitting is Caused by Heterogeneous Photocurrents and Not by Molecular Disorder |
| title_fullStr | Non-Ideal Cyclic Voltammetry of Redox Monolayers on Silicon Electrodes: Peak Splitting is Caused by Heterogeneous Photocurrents and Not by Molecular Disorder |
| title_full_unstemmed | Non-Ideal Cyclic Voltammetry of Redox Monolayers on Silicon Electrodes: Peak Splitting is Caused by Heterogeneous Photocurrents and Not by Molecular Disorder |
| title_short | Non-Ideal Cyclic Voltammetry of Redox Monolayers on Silicon Electrodes: Peak Splitting is Caused by Heterogeneous Photocurrents and Not by Molecular Disorder |
| title_sort | non-ideal cyclic voltammetry of redox monolayers on silicon electrodes: peak splitting is caused by heterogeneous photocurrents and not by molecular disorder |
| topic | Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science POTENTIAL SWEEP VOLTAMMOGRAM TERMINATED MONOLAYERS ADSORBED MOLECULES GENERAL EXPRESSION SURFACE ELECTROCHEMISTRY FUNCTIONALIZATION CHEMISTRY COUPLES SINGLE Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science POTENTIAL SWEEP VOLTAMMOGRAM TERMINATED MONOLAYERS ADSORBED MOLECULES GENERAL EXPRESSION SURFACE ELECTROCHEMISTRY FUNCTIONALIZATION CHEMISTRY COUPLES SINGLE |
| url | http://purl.org/au-research/grants/arc/DP190100735 http://purl.org/au-research/grants/arc/DP190100735 http://hdl.handle.net/20.500.11937/91725 |