COLL 295 |
| Interfacial boundary layer scattering at nanowire surfaces is a mechanism to sense chemisorption, particularly of Lewis bases, and a key challenge is to extract information about chemical dynamics through statistical characterization of current noise in structures supporting ballistic electron transport . These structures are composed of metallic wires which, at the narrowest constriction, are a few Au atoms in the transverse dimension. Current conduction is dominated by ballistic transport, and these structures are exceptionally sensitive to adsorption-induced alterations in electron scattering, the latter being measured through changes in the in-plane conductance. The principal focus of the work to be described is: (1) to understand the role played by dynamic chemical equilibrium in developing chemically derived signals at nanostructured measurement components; and (2) to use this understanding to develop new electrochemical and surface-initiated routes to chemical sensing and stimulus-responsive structures with nanometer-level control over growth and placement of molecular architectures. |
|
Electrochemistry-Enabled Nano S&T
9:00 AM-11:55 AM, Tuesday, April 8, 2008 Morial Convention Center -- Rm. 226, Oral
Division of Colloid & Surface Chemistry |