FABRICATION OF SWNTs FOR WATER DESALINATION AND MULTILAYER STRUCTURE FOR DNA SEQUENCING

• Main Author: Yao, Jingyuan
• Format: Others
• Published: UKnowledge 2012
• Subjects: Single wall carbon nanotube; Zeolite; water desalination; Multilayer; DNA sequencing; Materials Science and Engineering
• Online Access: http://uknowledge.uky.edu/cme_etds/40; http://uknowledge.uky.edu/cgi/viewcontent.cgi?article=1041&context=cme_etds

0.7nm single wall carbon nanotubes have been synthesized within VPI-5 zeolite channels with sucrose as carbon precursor. VPI-5 molecular sieves are synthesized hydrothermally under conventional heating. X-ray powder diffraction, micro raman, scanning electron microscope (SEM), transmission electron microscope (TEM), Thermogravimetric analysis have been used to investigate the structure of zeolite and thermal decoposition process of carbon precursors. 0.4nm single wall carbon nanotubes have also been fabricated within AlPO4-5 nanopores. A key challenge is to produce high yield single wall carbon nanotubes with uniform diameter. In order to improve the carbon nanotube yield, different organic precursors are employed. Although the problem is still the repetition and low yield of CNTs, it is still an improvement for 0.7nm SWNTs synthesis with the new template prolysis method. The novel multilayer conductor/insulator/conductor structures have been fabricated. This structure might find potential application in DNA sequential reactions because each layer might be individually addressed with voltage. When bias is applied to the conductive layer, it can be chemically functionalized, which leads to membrane pore with multiple reaction sequences when the molecule traverses the membrane reactor. In this thesis, Carbon/polymer/carbon system and copper/polymer system will be introduced. O2 RIE was used to expose the edge of carbon/polymer/carbon structure. However, the conductivity of carbon layer is not high enough for electroplating. Copper pores etched by FeCl3 solution shows good conductivity, and can be electroplated with metal nanoparticles.