Cover Image

Fabrication and optical behaviour of nanocomposites from electrodeposited au nanoparticles in polymer microcavities / Tan Kim Han

Metal composites and artificial electromagnetic materials might have unusual electromagnetic properties including negative refractive index, highly effective permittivity and permeability values that could be tuned by controlling meta-atoms arrangement, the smallest resonant unit cells in these mate...

Full description

Saved in:
Bibliographic Details
Main Author: Tan , Kim Han
Format: Thesis
Published: 2019
Subjects:
TA Engineering (General). Civil engineering (General)
TP Chemical technology
Online Access:http://studentsrepo.um.edu.my/10517/1/Tan_Kim_Han.pdf
http://studentsrepo.um.edu.my/10517/2/Tan_Kim_Han_%E2%80%93_Thesis.pdf
http://studentsrepo.um.edu.my/10517/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.um.stud.10517
record_format eprints
spelling my.um.stud.105172020-01-31T00:05:00Z Fabrication and optical behaviour of nanocomposites from electrodeposited au nanoparticles in polymer microcavities / Tan Kim Han Tan , Kim Han TA Engineering (General). Civil engineering (General) TP Chemical technology Metal composites and artificial electromagnetic materials might have unusual electromagnetic properties including negative refractive index, highly effective permittivity and permeability values that could be tuned by controlling meta-atoms arrangement, the smallest resonant unit cells in these materials. In this work, a composite of gold nanoparticles (Au NPs) deposited within the polymeric arrays of fringes was demonstrated. The fabrication procedure was suggested by exploiting distinct electromagnetic properties between the ordered polymer molecules and different sizes of Au NPs. The synthesized Au NPs were electrodeposited in the well-ordered square microcavities of positive photoresist (PR) that were formed under electrophoretic deposition (EPD) at 30 DV for 120 sec. The surface plasmon resonance (SPR) of Au NPs and the flexibility of the photoresist (PR) polymer serving as a dielectric made them be used in preparing metal-dielectric nanocomposites. The cavities were constructed from UV-patterning of the PR that was spin-coated on indium tin oxide (ITO) substrate with the assist of copper grids as a photomask. The optical constants become smaller which the highest gain (real permittivity) with the lowest losses (imaginary permittivity) were obtained due to the well-ordered cavities containing the Au NPs. By depositing the Au NPs with different sizes in a relatively ordered manner within the polymeric material, the optical constants and electromagnetic properties of the thin film could be tuned accordingly to suit in applications such as superlens (subwavelength imaging), flat panel displays, optical sensing, and absorbing media. 2019-04 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/10517/1/Tan_Kim_Han.pdf application/pdf http://studentsrepo.um.edu.my/10517/2/Tan_Kim_Han_%E2%80%93_Thesis.pdf Tan , Kim Han (2019) Fabrication and optical behaviour of nanocomposites from electrodeposited au nanoparticles in polymer microcavities / Tan Kim Han. PhD thesis, University of Malaya. http://studentsrepo.um.edu.my/10517/
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Student Repository
url_provider http://studentsrepo.um.edu.my/
topic TA Engineering (General). Civil engineering (General)
TP Chemical technology
spellingShingle TA Engineering (General). Civil engineering (General)
TP Chemical technology
Tan , Kim Han
Fabrication and optical behaviour of nanocomposites from electrodeposited au nanoparticles in polymer microcavities / Tan Kim Han
description Metal composites and artificial electromagnetic materials might have unusual electromagnetic properties including negative refractive index, highly effective permittivity and permeability values that could be tuned by controlling meta-atoms arrangement, the smallest resonant unit cells in these materials. In this work, a composite of gold nanoparticles (Au NPs) deposited within the polymeric arrays of fringes was demonstrated. The fabrication procedure was suggested by exploiting distinct electromagnetic properties between the ordered polymer molecules and different sizes of Au NPs. The synthesized Au NPs were electrodeposited in the well-ordered square microcavities of positive photoresist (PR) that were formed under electrophoretic deposition (EPD) at 30 DV for 120 sec. The surface plasmon resonance (SPR) of Au NPs and the flexibility of the photoresist (PR) polymer serving as a dielectric made them be used in preparing metal-dielectric nanocomposites. The cavities were constructed from UV-patterning of the PR that was spin-coated on indium tin oxide (ITO) substrate with the assist of copper grids as a photomask. The optical constants become smaller which the highest gain (real permittivity) with the lowest losses (imaginary permittivity) were obtained due to the well-ordered cavities containing the Au NPs. By depositing the Au NPs with different sizes in a relatively ordered manner within the polymeric material, the optical constants and electromagnetic properties of the thin film could be tuned accordingly to suit in applications such as superlens (subwavelength imaging), flat panel displays, optical sensing, and absorbing media.
format Thesis
author Tan , Kim Han
author_facet Tan , Kim Han
author_sort Tan , Kim Han
title Fabrication and optical behaviour of nanocomposites from electrodeposited au nanoparticles in polymer microcavities / Tan Kim Han
title_short Fabrication and optical behaviour of nanocomposites from electrodeposited au nanoparticles in polymer microcavities / Tan Kim Han
title_full Fabrication and optical behaviour of nanocomposites from electrodeposited au nanoparticles in polymer microcavities / Tan Kim Han
title_fullStr Fabrication and optical behaviour of nanocomposites from electrodeposited au nanoparticles in polymer microcavities / Tan Kim Han
title_full_unstemmed Fabrication and optical behaviour of nanocomposites from electrodeposited au nanoparticles in polymer microcavities / Tan Kim Han
title_sort fabrication and optical behaviour of nanocomposites from electrodeposited au nanoparticles in polymer microcavities / tan kim han
publishDate 2019
url http://studentsrepo.um.edu.my/10517/1/Tan_Kim_Han.pdf
http://studentsrepo.um.edu.my/10517/2/Tan_Kim_Han_%E2%80%93_Thesis.pdf
http://studentsrepo.um.edu.my/10517/
_version_ 1738506377178906624
score 13.211869

Similar Items