Accession Number : ADA500697


Title :   Solution Deposition Methods for Carbon Nanotube Field-Effect Transistors


Descriptive Note : Final rept. May-Dec 2008


Corporate Author : ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE


Personal Author(s) : Salaets, Natalie ; Ervin, Matthew


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a500697.pdf


Report Date : Jun 2009


Pagination or Media Count : 32


Abstract : This study evaluated different methods for controlled deposition of carbon nanotubes (CNTs) from solution onto a silicon substrate to make CNT field-effect transistors (FETs). The goal of this deposition was to achieve reproducible device properties through more uniform CNT densities and other traits. This method serves as an easier, room temperature alternative to chemical vapor deposition growth. Three different types of CNT solutions were spun onto substrates: pristine tubes solubilized with surfactant, COOH-functionalized tubes, and aminopyrene non-covalently functionalized tubes. Characterization of the CNT films was done with scanning electron microscopy. The CNTs were processed into FETs using standard microelectronics processing techniques. The resulting devices were characterized using a semiconductor parameter analyzer to measure their electrical properties. Preliminary results showed that the aminopyrene non-covalently functionalized CNTs were better dispersed and centrifugation could remove agglomerated tubes from the solution prior to spin-coating. A comparison of the results for each deposition method will help to determine which conditions are useful for producing CNT devices for chemical sensing and electronic applications.


Descriptors :   *CARBON NANOTUBES , DETECTION , CHEMICAL VAPOR DEPOSITION , SUBSTRATES , FIELD EFFECT TRANSISTORS , SEMICONDUCTORS , SCANNING ELECTRON MICROSCOPY , DEPOSITION , SILICON , MICROELECTRONICS , ANALYZERS , CHEMICAL DETECTION , ELECTRONICS , ROOM TEMPERATURE


Subject Categories : Electrical and Electronic Equipment
      Refractory Fibers


Distribution Statement : APPROVED FOR PUBLIC RELEASE