PHYS 288 |
| The development of highly-sensitive chemical sensors for hydrophobic (bio)markers is of great scientific and technological interests. Towards this end, Field Effect Transistors (FETs) in which the semiconducting channel between the “source” and “drain” is made from individual nanowires (NWs) of hexa-peri-hexabenzocoronene (HBC) derivatives were fabricated and characterized. Exposing the HBC NW FETs to a variety of hydrophobic analytes showed changes in the FET signals and dependence of the FET responses on the geometry (i.e., diameter and length) and preparation conditions of the HBC NWs. The results indicate that the sensing activity of the developed devices could be attributed to the large degree of freedom of the HBC surfaces and to their ability to undergo oriental and positional fluctuations, which assist charge transport and lead to a considerably enhanced conductivity and sensitivity. |
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Nanostructured Materials
1:20 PM-5:00 PM, Wednesday, April 9, 2008 Morial Convention Center -- Rm. 338, Oral
Division of Physical Chemistry |