Carbon nanotubes (CNTs) are a viable product for many different markets, one of which is energy development due to its unique properties related to electrical conductivity. One specific area of promise is the use of vertically aligned CNTs in supercapacitors. The CNT synthesis is a two-step process with the first being the formation of a thin film layer. The thin film substrate is created by means of the Thermal Evaporation Physical Vapor Deposition (TPVD) process and is performed within a high vacuum chamber. The layer deposit is monitored by a quartz crystal microbalance. The nanoparticle thin film substrate, ranging in thickness, is synthesized using a transition metal which acts as the nucleation points for CNT growth. After the thin film substrate is deposited, the CNTs are grown in a Chemical Vapor Deposition (CVD) growth chamber. Analysis of the thin film substrate and CNTs is performed primarily using Scanning Electron Microscopy (SEM). The measurements of the nanoparticles’ diameters and CNTs’ dimensions are carried out by image analysis program ImageJ. The results show the inclusion of ultrapure water in the CVD process contributed to the success of CNT growth. The CNT formation differs between silver thin film deposited on silicon substrate and iron thin film deposited on alumina (Al2O3) substrate. The focus of this thesis project is to explore and investigate different materials and conditions for optimal CNT synthesis in the hopes of creating a uniform forest of vertically aligned carbon nanotubes.
|Commitee:||Enjalran, Matthew, Horch, Elliot|
|School:||Southern Connecticut State University|
|School Location:||United States -- Connecticut|
|Source:||MAI 58/06M(E), Masters Abstracts International|
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