TY  - UNPB
ID  - discovery1356840
UR  - https://discovery.ucl.ac.uk/id/eprint/1356840/
EP  -  323
N2  - This thesis describes the characteristics and properties of aerosol assisted chemical vapour deposition (AACVD) and conventional atmospheric chemical vapour deposition (CVD) metal oxide thin films on glass substrates with or without metal, Au, Ag, Cu or Al dopants. Host metal oxide matrices including, ZnO and TiO2 with various dopants are known to give specific physical and optical properties desired by many industries and have various potential properties e.g. thermochromic, photochromic and are known as ?intelligent coatings?. The AACVD synthesis technique was used singularly or in combination with APCVD to achieve thin films on glass substrates either in static or dynamic situations with a range of temperatures (300-600 ÂșC). Computational fluid dynamics (CFD), Fluent? software, was used in a 2-equation, numerical study of fluid flow, velocity, particle trajectory, evaporation and thermophoretic effects on six combined AACVD/APCVD vertical reactor head designs; two designs were then selected as experimental prototypes and tested on a pilot rig chosen to more accurately simulate commercial Float glass production. Various functionalities of the thin films were analysed using transmittance/reflectance spectroscopy, RZ ink and stearic acid photocatalysis tests, resistivity and a variety of analytical techniques including SEM, XRD and XPS were used. The main findings include the effect of noble metal dopants (particularly Au and Ag), substrate synthesis temperature, fluid flow and droplet size have on the physical and chemical properties such as the morphology, crystallinity, water surface contact angle of the host metal oxide matrices. The nebulised AACVD droplet size, for solvent systems, are critical for deposition of the precursor chemicals onto the surface of the substrate, CFD particle trajectory of nebulised AACVD methanol droplets were calculated to be 1 order of magnitude too small to overcome the main forces of influence aerodynamic drag and at higher synthesis temperature evaporation.
AV  - public
M1  - Doctoral
Y1  - 2012/09/28/
TI  - Characteristics of aerosol assisted and conventional chemical vapour deposition of metal oxide thin films on glass, with or without metal dopants
PB  - UCL (University College London)
A1  - Walters, G
KW  - chemical vapour deposition
KW  -  thin films
KW  -  metal oxide
KW  -  aerosol assisted chemical vapour deposition
KW  -  metal dopants
KW  -  Noble metal dopants
KW  -  gold dopant
KW  -  silver dopant
KW  -  copper dopant
KW  -  zinc oxide
KW  -  titania films
KW  -  RZ indicator ink
KW  -  computational fluid dynamics
KW  -  k-e Realizable Model
KW  -  k-w SST Model
KW  -  2 equation numerical modelling
KW  -  thermophoresis
KW  -  droplet trajectory modelling
KW  -  discrete modelling
KW  -  turbulent modelling
KW  -  turbulent flow
KW  -  laminar flow
KW  -  volume mesh generation
KW  -  Fluent
KW  -  Gambit
KW  -  evaporation modelling
KW  -  stearic acid test
KW  -  Al dopant
SP  - 1 
N1  - Unpublished
ER  -