Events
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| 14
Start: 2007-05-14 16:00
End: 2007-05-14 18:00
Semiconducting carbon nanotubes are extremely sensitive to their electrostatic environment. We use this property to build single-nanotube sensors in liquid environments that detect bio-molecule adsorption in real time via changes in device conductivity. The mechanisms for conductance modulation upon adsorption have been controversial. I will present scanned probe measurements and liquid gating measurements that resolve much of this controversy. We show how modulation of Schottky barrier contacts, together with bulk doping of the nanotubes, lead to gate-dependant changes in conductivity. | 15
Start: 2007-05-15 14:00
End: 2007-05-15 16:00
For more information, please see www.physics.oregonstate.edu/TeachSeminar | 16
Start: 2007-05-16 16:00
End: 2007-05-16 18:00
There has been considerable interest in the potential application of terahertz (THz) time domain spectroscopy (TDS) for a variety of problems, including the detection of explosive devices and imaging for biomedical applications. The THz regime has many advantages, including the possibility of a safe (non-ionizing) screening modality and the potential for high-resolution 3D imaging. It also has the advantage of exhibiting spectral peaks that can be used, for example, to classify explosives or detect the presence of cancerous cells. | 17
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