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Title: In Situ Electric-Field-Induced Contrast Imaging of Electronic Transport Pathways in Nanotube-Polymer Composites

Abstract

An electric-field-induced contrast mechanism for scanning electron microscopy is reported which permits the visualization of embedded nanomaterials inside various matrices with high contrast and high definition. The high contrast is proposed to result from localized enhancement of secondary electron emission from the nanomaterials due to electric-field-induced changes in their work functions. By utilizing a stage that allows in situ current-voltage measurements inside a scanning electron microscope, single-walled carbon nanotubes embedded within polymethyl methacrylate films were visualized directly. In addition to the rapid assessment of nanotube dispersion within polymers, electric-field-induced contrast imaging enables the determination of percolation pathways. From the contrast in the images, the relative voltage at all points in the electron micrograph can be determined, providing a new mechanism to understand electronic percolation through nanoscale networks.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1003605
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 89; Journal Issue: 1
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; CARBON; ELECTRON EMISSION; ELECTRON MICROSCOPES; ELECTRONS; MATRICES; METHACRYLATES; NANOTUBES; POLYMERS; SCANNING ELECTRON MICROSCOPY; TRANSPORT; WORK FUNCTIONS

Citation Formats

Jesse, Stephen, Guillorn, Michael A, Ivanov, Ilia N, Puretzky, Alexander A, Howe, Jane Y, Britt, Phillip F, and Geohegan, David B. In Situ Electric-Field-Induced Contrast Imaging of Electronic Transport Pathways in Nanotube-Polymer Composites. United States: N. p., 2006. Web. doi:10.1063/1.2220058.
Jesse, Stephen, Guillorn, Michael A, Ivanov, Ilia N, Puretzky, Alexander A, Howe, Jane Y, Britt, Phillip F, & Geohegan, David B. In Situ Electric-Field-Induced Contrast Imaging of Electronic Transport Pathways in Nanotube-Polymer Composites. United States. doi:10.1063/1.2220058.
Jesse, Stephen, Guillorn, Michael A, Ivanov, Ilia N, Puretzky, Alexander A, Howe, Jane Y, Britt, Phillip F, and Geohegan, David B. Sun . "In Situ Electric-Field-Induced Contrast Imaging of Electronic Transport Pathways in Nanotube-Polymer Composites". United States. doi:10.1063/1.2220058.
@article{osti_1003605,
title = {In Situ Electric-Field-Induced Contrast Imaging of Electronic Transport Pathways in Nanotube-Polymer Composites},
author = {Jesse, Stephen and Guillorn, Michael A and Ivanov, Ilia N and Puretzky, Alexander A and Howe, Jane Y and Britt, Phillip F and Geohegan, David B},
abstractNote = {An electric-field-induced contrast mechanism for scanning electron microscopy is reported which permits the visualization of embedded nanomaterials inside various matrices with high contrast and high definition. The high contrast is proposed to result from localized enhancement of secondary electron emission from the nanomaterials due to electric-field-induced changes in their work functions. By utilizing a stage that allows in situ current-voltage measurements inside a scanning electron microscope, single-walled carbon nanotubes embedded within polymethyl methacrylate films were visualized directly. In addition to the rapid assessment of nanotube dispersion within polymers, electric-field-induced contrast imaging enables the determination of percolation pathways. From the contrast in the images, the relative voltage at all points in the electron micrograph can be determined, providing a new mechanism to understand electronic percolation through nanoscale networks.},
doi = {10.1063/1.2220058},
journal = {Applied Physics Letters},
number = 1,
volume = 89,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}