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You searched for +publisher:"University of Limerick" +contributor:("Liu, Ning"). Showing records 1 – 2 of 2 total matches.

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University of Limerick

1. Bhowmick, Saikat. Ordered layers of nanocrystals through EPD.

Degree: 2019, University of Limerick

It is quite well-known that, deposition of highly-ordered layers of colloidal nanocrystals (mostly semiconductor and metal) onto different types of substrates is a really important aspect for various types of device fabrication and for other applications in many diverse areas. There are various different methods for forming these thin films/coatings of nanocrystals onto different substrates. But, among them, electrophoretic deposition (EPD) technique has attracted a lot of attention in the recent years due to its simplicity, high level of efficiency and cost-effectiveness. In this study, highly-ordered, close-packed, vertically-aligned, multi-layered assemblies of semiconductor nanorods (mainly CdSe) were deposited successfully by EPD process onto different types of substrates. Also, multi-layered, vertically- aligned, close-packed assemblies of two different types of semiconductor nanorods (CdSe and CdSeS) on the same substrate were obtained by EPD process. Apart from that, EPD of gold nanorods were also performed and good vertical alignment was obtained as well. Different parameters related to the EPD process have been studied in this work, which will help us in understanding the process of EPD in depth for various useful applications and device fabrication. Advisors/Committee Members: Ryan, Kevin M., Liu, Ning.

Subjects/Keywords: nanocrystals; nanorods; EPD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Bhowmick, S. (2019). Ordered layers of nanocrystals through EPD. (Thesis). University of Limerick. Retrieved from http://hdl.handle.net/10344/8494

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Bhowmick, Saikat. “Ordered layers of nanocrystals through EPD.” 2019. Thesis, University of Limerick. Accessed July 09, 2020. http://hdl.handle.net/10344/8494.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Bhowmick, Saikat. “Ordered layers of nanocrystals through EPD.” 2019. Web. 09 Jul 2020.

Vancouver:

Bhowmick S. Ordered layers of nanocrystals through EPD. [Internet] [Thesis]. University of Limerick; 2019. [cited 2020 Jul 09]. Available from: http://hdl.handle.net/10344/8494.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bhowmick S. Ordered layers of nanocrystals through EPD. [Thesis]. University of Limerick; 2019. Available from: http://hdl.handle.net/10344/8494

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


University of Limerick

2. Pita, Isabel A. The formation and enhancement of heterostructures to optimize surface plasmon propagation in nano-optics devices.

Degree: 2017, University of Limerick

This thesis focuses on the formation of heterogeneous structures, and their optimization to form improved components for nanocircuits; including light source, antenna incorporation for enhanced wave guiding, and probe tip fabrication for device testing. A method was developed for the heteroaggregation assisted wet synthesis of core-shell nanowires by coating silver nanowires with a thin silica layer followed by an outer shell of CdSe or Au nanoparticles. Total coverage of nanoparticles on nanowires was found to increase with the nanoparticle size, which is attributed to the increase in the van der Waals interaction between the nanoparticles and the nanowire with the increasing size of nanoparticles, with steric repulsion also contributing due length of capping ligands limiting the overall achievable coverage. Investigation of the core-shell nanowire’s optical properties yielded CdSe Raman peak enhancement by a factor of 2-3 due to the excitation of surface plasmon propagation making them suitable for probe tip incorporation. A CdSe-SiO2-Si heterostructure was developed and optimized by determining the optimum silica layer thickness for different CdSe block thicknesses through COMSOL simulations to form a nanocircuit light source. Once obtained; the optimum structure was formed through electrophoretic deposition of CdSe on silica coated silicon wafers and tested for lasing. A 500 nm thick CdSe layer on 100 nm of silica coated silver nanowires showed a lasing peak around 670 nm highlighting the effective mode confinement. The optimum thickness for trench patterns was also determined through simulations; though no further enhancement was achievable through antenna use. The overall improvement in surface plasmon waveguide propagation afforded by antenna structures was investigated by comparing bowtie and semicircle antenna for the surface plasmon propagation in Au-Mica trench patterned and line cut plain waveguide structures both experimentally and through COMSOL simulations. Both the effects of polarization and wavelength were investigated and discussed. In a broadband system; the bowtie antenna was shown to result in an enhancement factor of 2.12 ± 0.40 when the beam was perpendicular to the regular waveguide yet with no enhancement for parallel polarizations, and for the line cut strong enhancement for a parallel polarization with no noticeable enhancement for the perpendicular condition. Similar results were obtained for the semicircle antenna for the line cut; yet with no noticeable enhancement for the trench cut plain waveguide structure. This was found to be due to the excitation of different modes: surface plasmon modes and gap modes, depending on beam polarization. The mode leakage into the substrate was also discussed. The effects of filling the trench and line cut structures with semiconductor materials for the Au-Mica substrates are also investigated through COMSOL simulations. Filling the Au-Mica line cuts improves surface plasmon propagation by a factor of 10 due to improved mode confinement. The potential… Advisors/Committee Members: Liu, Ning, Silien, Christophe, Ryan, Kevin M..

Subjects/Keywords: heterogeneous structures; nanocircuits; nano-optics devices

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Pita, I. A. (2017). The formation and enhancement of heterostructures to optimize surface plasmon propagation in nano-optics devices. (Thesis). University of Limerick. Retrieved from http://hdl.handle.net/10344/8176

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Pita, Isabel A. “The formation and enhancement of heterostructures to optimize surface plasmon propagation in nano-optics devices.” 2017. Thesis, University of Limerick. Accessed July 09, 2020. http://hdl.handle.net/10344/8176.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Pita, Isabel A. “The formation and enhancement of heterostructures to optimize surface plasmon propagation in nano-optics devices.” 2017. Web. 09 Jul 2020.

Vancouver:

Pita IA. The formation and enhancement of heterostructures to optimize surface plasmon propagation in nano-optics devices. [Internet] [Thesis]. University of Limerick; 2017. [cited 2020 Jul 09]. Available from: http://hdl.handle.net/10344/8176.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pita IA. The formation and enhancement of heterostructures to optimize surface plasmon propagation in nano-optics devices. [Thesis]. University of Limerick; 2017. Available from: http://hdl.handle.net/10344/8176

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.