PHYS 667 |
| We developed a novel laser-based microscopy for addressing electrical properties of a large number of individual nanostructures. Here, a diffraction limited laser spot was scanned over nanostructures to induce local heating, decreasing their electrical conductance. Surprisingly, this laser induced heating signal (Figure) provides a direct measure of the electrical conductance of the illuminated structure. We applied this technique to successfully characterize a large number of carbon nanotubes grown over a macroscopic area (~millimeters) with a high throughput (> 100/min). Our technique is an important step toward a real-time chemical imaging with which one can monitor electrical conductance change of an array of nanostructures while they are exposed to various chemical reactions.
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Nanostructured Materials
8:20 AM-12:00 PM, Thursday, April 10, 2008 Morial Convention Center -- Rm. 338/339, Oral
Division of Physical Chemistry |
