Real-time Intelligent Chemical and Biological Nanosensors on Flexible Platform - II

Abstract

In this report, we investigate the current rectification property of chemical vapor deposited (CVD), as-grown single-walled carbon nanotubes (SWNTs). We use the long strands of SWNT bundles to fabricate multiple arrays of switching devices with channel lengths of 3, 5, 7, and 10 micrometer on a 15 x 15 mm2 silicon dioxide (SiO2) on silicon (Si) substrate. A majority of the fabricated devices, regardless of channel length, showed current rectification characteristics with high throughput of current (I) in the forward bias (V). Atomic force microscopic (AFM) analysis of the device structure and surface topology of SWNTs suggests the observed rectification of current results from surface irregularities and is possibly due to change in the chirality of a single tube. Using fabricated SWNT field-effect transistors (FETs), we have demonstrated the effects of gases, particularly O2and N2, on the fabricated devices.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2009
Accession Number
ADA496166

Entities

People

  • Govind Mallick
  • Shashi P. Karna

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Carbon Nanotubes
  • Chemical Vapor Deposition
  • Chemical Warfare Agents
  • Detection
  • Detectors
  • Electron Microscopes
  • Electronics
  • Field Effect Transistors
  • Fullerenes
  • Materials
  • Materials Science
  • Measurement
  • Military Research
  • Nanosensors
  • Platforms
  • Semiconductors
  • Switching

Fields of Study

  • Physics

Readers

  • Integrated Circuit Design and Technology.
  • Nanoscale Plasmonic Nanotechnology