Sensitivity optimisation of hybrid calixarene-reduced graphene oxide langmuir-blodgett thin films via langmuir, optical, structural and elektrical characterisations

Sensitivity optimisation of hybrid calixarene-reduced graphene oxide langmuir-blodgett thin films via langmuir, optical, structural and elektrical characterisations

The study aimed to investigate the characteristics of calixarene, reduced graphene oxide(rGO) and their composite in order to optimise the sensitivity of the composite. The calixarenes(calix[4]arene, calix[6]arene and calix[8]arene) and rGO were prepared in solutionto form a Langmuir film by using L...

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Main Author: Lim, Darwina Choo Kheng
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Language:eng
Published: 2020
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QC Physics
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spellingShingle QC Physics
Lim, Darwina Choo Kheng
Sensitivity optimisation of hybrid calixarene-reduced graphene oxide langmuir-blodgett thin films via langmuir, optical, structural and elektrical characterisations
description The study aimed to investigate the characteristics of calixarene, reduced graphene oxide(rGO) and their composite in order to optimise the sensitivity of the composite. The calixarenes(calix[4]arene, calix[6]arene and calix[8]arene) and rGO were prepared in solutionto form a Langmuir film by using Langmuir-Blodgett (LB) trough. The values of 30 mN/m and15 mN/m were selected for calixarenes and rGO respectively for the thin film deposition. Thesurface potential (?V) and effective dipole moment (?) of calixarenes were alsoinvestigated. The optical properties of calixarene in solution and thin film were studied using UV-Visible (UV-Vis) spectroscopy and compared to ensure the stability ofthe thin film. Meanwhile, the rGO thin film was characterised with UV-Vis spectroscopy for theoptical property, Raman spectroscopy for the crystallinity and four-point probe for theelectrical property to obtain current-voltage (I-V) characteristics, resistivity, andconductivity. Field Emission Scanning Electron Microscopy (FESEM) was used to observe thesurface morphology of calixarene and rGO thin films. Then, both the materials were fabricated intovarious types of calixarenes-rGO composites using the LB technique. Same characterisationprocedures were applied to the newly formed composites using UV-Vis spectroscopy, Ramanspectroscopy, four-point probe, and FESEM. Results showed that the addition of rGO inthe fabrication of calixarene thin-film has improved the electrical property of thecomposite as calixarene is a non-conductive material. The structural and optical properties investigation also showed good structural and stable thin film formedfrom both materials. Calix[8]arene-rGO composited with 6 layers of rGO is thebest-fabricated composite, as shown from the characterization process. As a conclusion, thisstudy implies that rGO plays a significant role in improving the conductivityperformance of calixarene, thus giverise to the further potential of calixarene in sensing application.
format thesis
qualification_name
qualification_level Master's degree
author Lim, Darwina Choo Kheng
author_facet Lim, Darwina Choo Kheng
author_sort Lim, Darwina Choo Kheng
title Sensitivity optimisation of hybrid calixarene-reduced graphene oxide langmuir-blodgett thin films via langmuir, optical, structural and elektrical characterisations
title_short Sensitivity optimisation of hybrid calixarene-reduced graphene oxide langmuir-blodgett thin films via langmuir, optical, structural and elektrical characterisations
title_full Sensitivity optimisation of hybrid calixarene-reduced graphene oxide langmuir-blodgett thin films via langmuir, optical, structural and elektrical characterisations
title_fullStr Sensitivity optimisation of hybrid calixarene-reduced graphene oxide langmuir-blodgett thin films via langmuir, optical, structural and elektrical characterisations
title_full_unstemmed Sensitivity optimisation of hybrid calixarene-reduced graphene oxide langmuir-blodgett thin films via langmuir, optical, structural and elektrical characterisations
title_sort sensitivity optimisation of hybrid calixarene-reduced graphene oxide langmuir-blodgett thin films via langmuir, optical, structural and elektrical characterisations
granting_institution Universiti Pendidikan Sultan Idris
granting_department Fakulti Sains dan Matematik
publishDate 2020
url https://ir.upsi.edu.my/detailsg.php?det=5564
_version_ 1747833208647450624
spelling oai:ir.upsi.edu.my:55642021-02-16 Sensitivity optimisation of hybrid calixarene-reduced graphene oxide langmuir-blodgett thin films via langmuir, optical, structural and elektrical characterisations 2020 Lim, Darwina Choo Kheng QC Physics The study aimed to investigate the characteristics of calixarene, reduced graphene oxide(rGO) and their composite in order to optimise the sensitivity of the composite. The calixarenes(calix[4]arene, calix[6]arene and calix[8]arene) and rGO were prepared in solutionto form a Langmuir film by using Langmuir-Blodgett (LB) trough. The values of 30 mN/m and15 mN/m were selected for calixarenes and rGO respectively for the thin film deposition. Thesurface potential (?V) and effective dipole moment (?) of calixarenes were alsoinvestigated. The optical properties of calixarene in solution and thin film were studied using UV-Visible (UV-Vis) spectroscopy and compared to ensure the stability ofthe thin film. Meanwhile, the rGO thin film was characterised with UV-Vis spectroscopy for theoptical property, Raman spectroscopy for the crystallinity and four-point probe for theelectrical property to obtain current-voltage (I-V) characteristics, resistivity, andconductivity. Field Emission Scanning Electron Microscopy (FESEM) was used to observe thesurface morphology of calixarene and rGO thin films. Then, both the materials were fabricated intovarious types of calixarenes-rGO composites using the LB technique. Same characterisationprocedures were applied to the newly formed composites using UV-Vis spectroscopy, Ramanspectroscopy, four-point probe, and FESEM. Results showed that the addition of rGO inthe fabrication of calixarene thin-film has improved the electrical property of thecomposite as calixarene is a non-conductive material. The structural and optical properties investigation also showed good structural and stable thin film formedfrom both materials. Calix[8]arene-rGO composited with 6 layers of rGO is thebest-fabricated composite, as shown from the characterization process. As a conclusion, thisstudy implies that rGO plays a significant role in improving the conductivityperformance of calixarene, thus giverise to the further potential of calixarene in sensing application. 2020 thesis https://ir.upsi.edu.my/detailsg.php?det=5564 https://ir.upsi.edu.my/detailsg.php?det=5564 text eng closedAccess Masters Universiti Pendidikan Sultan Idris Fakulti Sains dan Matematik Aradhana, R., Mohanty, S., & Nayak, S. K. (2018). Comparison of mechanical, electricaland thermal properties in graphene oxide and reduced graphene oxide filled epoxy nanocompositeadhesives. Polymer, 141, 109123. doi:10.1016/j.pol ymer.2018.03.005Ariga, K., Yamauchi, Y., Mori, T., & Hill, J. P. (2013). 25th Anniversary Article:What can be done with the Langmuir-Blodgett method? Recent developments and its criticalrole in materials science. 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