Synthesis and characterization of carbon-based micro-and nanostructures using carbon nanopowder via horizontal vapor phase deposition growth technique

• Main Authors: Carlos, Kim Benedict C., Isidro, Gideon Wolfgang A.
• Format: text
• Language: English
• Published: Animo Repository 2010
• Subjects: Carbon; Chemistry
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/5725
• Institution: De La Salle University

Carbon nanotubes (CNT) are carbon-based nanostructures (CNS) that have many promising applications in medicine, engineering, electronics, and other fields. Many different methods have been and are being developed for the synthesis of CNT. This research aims to synthesize CNS using horizontal vapor phase deposition growth technique (HVPG). This method affords many advantages for investigating the dependence of CNS growth on various variables such as heating temperature, heating rate, and heating time. The CNS synthesis was carried out with 0.035g of carbon black and 99.9% carbon nanopowder under vacuum conditions. The material was placed in quartz tubes under vacuum with a pressure of about 106 torr. Baking time and temperatures were varied from 4-8 hrs at a constant temperature of 1200 C. We also varied the baking temperatures from 400-1200 C at a constant time of 8 hrs using the ThermoLyne furnace. Different amount and sizes of CNS were produced. The products were characterized by scanning electron microscope (SEM) and energy dispersive X-ray (EDX) results show that increasing the baking temperatures and times increase the amount of CNS synthesized. Increasing the baking time increases the thickness of the carbon nanowires (CNW). At a certain point, CNWs decrease in thickness before they fuse into thicker carbon wires (CW). Once fusion has occurred, the infused CNWs connected to the CWs may grow thicker. The results of this study could provide insight into the mechanics involved in CNS formation under the conditions used.