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...

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Main Authors: Rao, Manohar, Pandharipande, Rohit, Madhu, Sheri, Ravikanth, Mangalampalli, Rao, V. Ramgopal, Khaderbad, Mrunal A., Jinesh, K. B.
Other Authors: Energy Research Institute @ NTU (ERI@N)
Format: Article
Language:English
Published: 2013
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Online Access:https://hdl.handle.net/10356/106356
http://hdl.handle.net/10220/13734
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.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
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials
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
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.
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.
format Article
author Rao, Manohar
Pandharipande, Rohit
Madhu, Sheri
Ravikanth, Mangalampalli
Rao, V. Ramgopal
Khaderbad, Mrunal A.
Jinesh, K. B.
author_sort Rao, Manohar
title 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_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_sort effect of central metal ion on molecular dipole in porphyrin self-assembled monolayers
publishDate 2013
url https://hdl.handle.net/10356/106356
http://hdl.handle.net/10220/13734
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