AI SearchStudies on the synthesis of carbon nanotubes by chemical vapor deposition using a low vacuum process
Call Number: AIT Thesis no.ISE-12-54 Material type:
SeriesSeries: Asian Institute of Technology. Thesis ; no. ISE-12-54Publication details: Pathum Thani : Asian Institute of Technology, 2012Description: 1online resource (68 p.) : illSubject(s): Online resources: Dissertation note: Thesis (M. Sc.) - Asian Institute of Technology, 2012 Summary: Carbon nanotubes (CNTs) have incomparable physical properties and their applicationsin various fields have been well established over the last two decades. The electronic properties of CNTs, however, significantly change depending on their chirality and the number of graphene walls. Therefore, first of all, theselective growth of graphene wallsis required, and ultimately, chiral selection technology should be established. In order to improve the selectivity and uniformity of CNTs, we have examined the growthof CNTs on aquartz substrate. Carbon nanotubes (CNTs) were fabricated by chemical vapor deposition (CVD) using a low vacuumprocess.Cobalt (Co) nanoparticles and molybdenum (Mo) sensitizerswere deposited as metal catalysts on quartz substratesby spray evaporation technique.Acetylene wasutilized asthe carbon feedstock and 5% H2/Ar was the carrier gas. The growth of CNTswas carried out at 650-750 °C for 30 minutes. In this work, optimum CNT synthesis conditions were determined for threereaction parametersnamely, concentration of catalyst solution, precursor flow rate,and reaction temperature. CNTsamples were characterized by scanning electron microscope (SEM) and transmission electron microscopy(TEM).
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Asian Institute of Technology Library AIT Publications | AIT Thesis no.ISE-12-54 (Browse shelf(Opens below)) | 1 | Available | 30050120845416 |
A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Nanotechnology, School of Engineering and Technology
Thesis (M. Sc.) - Asian Institute of Technology, 2012
Carbon nanotubes (CNTs) have incomparable physical properties and their applicationsin various fields have been well established over the last two decades. The electronic properties of CNTs, however, significantly change depending on their chirality and the number of graphene walls. Therefore, first of all, theselective growth of graphene wallsis required, and ultimately, chiral selection technology should be established. In order to improve the selectivity and uniformity of CNTs, we have examined the growthof CNTs on aquartz substrate. Carbon nanotubes (CNTs) were fabricated by chemical vapor deposition (CVD) using a low vacuumprocess.Cobalt (Co) nanoparticles and molybdenum (Mo) sensitizerswere deposited as metal catalysts on quartz substratesby spray evaporation technique.Acetylene wasutilized asthe carbon feedstock and 5% H2/Ar was the carrier gas. The growth of CNTswas carried out at 650-750 °C for 30 minutes. In this work, optimum CNT synthesis conditions were determined for threereaction parametersnamely, concentration of catalyst solution, precursor flow rate,and reaction temperature. CNTsamples were characterized by scanning electron microscope (SEM) and transmission electron microscopy(TEM).
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