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The rheology of silicon nanoparticle inks fro screen printing electronic devices
In the development of inks for printed electronics, it is important to understand the behaviour of the functional inks and more especially their rheology and surface properties. This project emphasises the importance of ink characterization by performing rheological tests on silicon nanoparticle bas...
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| Format: | Thesis |
| Language: | English |
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Department of Physics
2014
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| _version_ | 1867613186957508608 |
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| access_status_str | Open Access |
| author | Mathe, Ntombizodwa |
| author_browse | Mathe, Ntombizodwa |
| author_facet | Mathe, Ntombizodwa |
| author_sort | Mathe, Ntombizodwa |
| collection | Thesis |
| description | In the development of inks for printed electronics, it is important to understand the behaviour of the functional inks and more especially their rheology and surface properties. This project emphasises the importance of ink characterization by performing rheological tests on silicon nanoparticle based inks that are used in the screen printing of electronic devices. The inks were characterized for linear viscoelastic behaviour, flow behaviour, change in properties with angular frequency, as well as thixotropic behaviour. All showed shear thinning, with the more dilute inks showing a power law (Ostwald / de Waele model) behaviour dependence of complex viscosity on angular frequency. The flow behaviour of the inks was also seen to follow a Windhab model. The printability of the inks primarily depends on the shear-dependent viscosity as highly viscous and dilute inks do not produce good printed structures. The printed layers showed electrical and optical activity. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/6536 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:08.355Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Physics |
| publisherStr | Department of Physics |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/6536 The rheology of silicon nanoparticle inks fro screen printing electronic devices Mathe, Ntombizodwa Physics In the development of inks for printed electronics, it is important to understand the behaviour of the functional inks and more especially their rheology and surface properties. This project emphasises the importance of ink characterization by performing rheological tests on silicon nanoparticle based inks that are used in the screen printing of electronic devices. The inks were characterized for linear viscoelastic behaviour, flow behaviour, change in properties with angular frequency, as well as thixotropic behaviour. All showed shear thinning, with the more dilute inks showing a power law (Ostwald / de Waele model) behaviour dependence of complex viscosity on angular frequency. The flow behaviour of the inks was also seen to follow a Windhab model. The printability of the inks primarily depends on the shear-dependent viscosity as highly viscous and dilute inks do not produce good printed structures. The printed layers showed electrical and optical activity. 2014-08-13T20:08:18Z 2014-08-13T20:08:18Z 2010 Master Thesis Masters MSc http://hdl.handle.net/11427/6536 eng application/pdf Department of Physics Faculty of Science University of Cape Town |
| spellingShingle | Physics Mathe, Ntombizodwa The rheology of silicon nanoparticle inks fro screen printing electronic devices |
| thesis_degree_str | Master's |
| title | The rheology of silicon nanoparticle inks fro screen printing electronic devices |
| title_full | The rheology of silicon nanoparticle inks fro screen printing electronic devices |
| title_fullStr | The rheology of silicon nanoparticle inks fro screen printing electronic devices |
| title_full_unstemmed | The rheology of silicon nanoparticle inks fro screen printing electronic devices |
| title_short | The rheology of silicon nanoparticle inks fro screen printing electronic devices |
| title_sort | rheology of silicon nanoparticle inks fro screen printing electronic devices |
| topic | Physics |
| url | http://hdl.handle.net/11427/6536 |
| work_keys_str_mv | AT mathentombizodwa therheologyofsiliconnanoparticleinksfroscreenprintingelectronicdevices AT mathentombizodwa rheologyofsiliconnanoparticleinksfroscreenprintingelectronicdevices |