Effect of central metal ion on molecular dipole in porphyrin self-assembled monolayers
The physical and electronic properties of nano-scale semiconductor devices are mainly decided by their surfaces and interfaces. Use of dipolar self-assembled monolayer (SAM) on semiconductor/oxide interfaces has an enormous potential to tailor the behavior of nanoelectronic, optical and biological d...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/106356 http://hdl.handle.net/10220/13734 |
| _version_ | 1826123035092975616 |
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| author | Rao, Manohar Pandharipande, Rohit Madhu, Sheri Ravikanth, Mangalampalli Rao, V. Ramgopal Khaderbad, Mrunal A. Jinesh, K. B. |
| author2 | Energy Research Institute @ NTU (ERI@N) |
| author_facet | Energy Research Institute @ NTU (ERI@N) Rao, Manohar Pandharipande, Rohit Madhu, Sheri Ravikanth, Mangalampalli Rao, V. Ramgopal Khaderbad, Mrunal A. Jinesh, K. B. |
| author_sort | Rao, Manohar |
| collection | NTU |
| description | The physical and electronic properties of nano-scale semiconductor devices are mainly decided by their surfaces and interfaces. Use of dipolar self-assembled monolayer (SAM) on semiconductor/oxide interfaces has an enormous potential to tailor the behavior of nanoelectronic, optical and biological devices. Among different molecules, porphyrins have been identified to form chemically stable SAMs on different substrates and their dipolar properties can be tuned by incorporating various metal species in them. This allows work-function tuning according to various technological needs. In this paper, we describe the effect of central metal ion (selected period-4 transition metal ions Zn, Cu, Ni, Fe and Co) incorporated in 5-(4-hydroxyphenyl)-10,15,20-tri(p-tolyl)porphyrin (TTPOH) on the surface potential using Kelvin probe microscopy. Density functional theory (DFT) calculations were performed to estimate the magnitude of dipole moments. Also, absorption spectra of TTPOH molecule and its metal derivatives are compared. |
| first_indexed | 2024-10-01T05:58:02Z |
| format | Journal Article |
| id | ntu-10356/106356 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:58:02Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/1063562021-01-08T06:08:06Z Effect of central metal ion on molecular dipole in porphyrin self-assembled monolayers Rao, Manohar Pandharipande, Rohit Madhu, Sheri Ravikanth, Mangalampalli Rao, V. Ramgopal Khaderbad, Mrunal A. Jinesh, K. B. Energy Research Institute @ NTU (ERI@N) DRNTU::Engineering::Materials The physical and electronic properties of nano-scale semiconductor devices are mainly decided by their surfaces and interfaces. Use of dipolar self-assembled monolayer (SAM) on semiconductor/oxide interfaces has an enormous potential to tailor the behavior of nanoelectronic, optical and biological devices. Among different molecules, porphyrins have been identified to form chemically stable SAMs on different substrates and their dipolar properties can be tuned by incorporating various metal species in them. This allows work-function tuning according to various technological needs. In this paper, we describe the effect of central metal ion (selected period-4 transition metal ions Zn, Cu, Ni, Fe and Co) incorporated in 5-(4-hydroxyphenyl)-10,15,20-tri(p-tolyl)porphyrin (TTPOH) on the surface potential using Kelvin probe microscopy. Density functional theory (DFT) calculations were performed to estimate the magnitude of dipole moments. Also, absorption spectra of TTPOH molecule and its metal derivatives are compared. 2013-09-30T06:33:01Z 2019-12-06T22:09:45Z 2013-09-30T06:33:01Z 2019-12-06T22:09:45Z 2012 2012 Journal Article Khaderbad, M. A., Rao, M., Jinesh, K. B., Pandharipande, R., Madhu, S., Ravikanth, M., & Rao, V. R. (2012). Effect of central metal ion on molecular dipole in porphyrin self-assembled monolayers. Nanoscience and nanotechnology letters, 4(7), 729-732. https://hdl.handle.net/10356/106356 http://hdl.handle.net/10220/13734 10.1166/nnl.2012.1380 en Nanoscience and nanotechnology letters |
| spellingShingle | DRNTU::Engineering::Materials Rao, Manohar Pandharipande, Rohit Madhu, Sheri Ravikanth, Mangalampalli Rao, V. Ramgopal Khaderbad, Mrunal A. Jinesh, K. B. Effect of central metal ion on molecular dipole in porphyrin self-assembled monolayers |
| title | Effect of central metal ion on molecular dipole in porphyrin self-assembled monolayers |
| title_full | Effect of central metal ion on molecular dipole in porphyrin self-assembled monolayers |
| title_fullStr | Effect of central metal ion on molecular dipole in porphyrin self-assembled monolayers |
| title_full_unstemmed | Effect of central metal ion on molecular dipole in porphyrin self-assembled monolayers |
| title_short | Effect of central metal ion on molecular dipole in porphyrin self-assembled monolayers |
| title_sort | effect of central metal ion on molecular dipole in porphyrin self assembled monolayers |
| topic | DRNTU::Engineering::Materials |
| url | https://hdl.handle.net/10356/106356 http://hdl.handle.net/10220/13734 |
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