Functional Microstructures by Self-Assembly - Molecular Self-Assembly: Advances and Applications - page 395

emission at the molecule/metal interface controls conduction for
long channel lengths [3,4].

Figure 12.6 Electrical characteristics of gated multilayer structures of

PYPA. (a) Scanning electron micrographs and schematic of
device configuration. (b) Drain-source current in dependency
of channel length (top) and temperature (bottom). Curve
fitting for temperature dependency utilized Poole

−

Frenkel

emission model. (c) Temperature dependent I vs. V

DS GS

characteristics with inset displaying on/off current ratios.
Reprinted with permission from Ref. [4]. Copyright 2006,
American Institute of Physics.

12.2.3 Self-Assembled Quantum Dot Subdiffraction

Waveguides

Nanoscale photonic waveguides based on light transmission by
semiconducting QDs are ideal in that they allow for subwavelength
dimensions with versatile shapes, overcoming the diffraction
limit, and reducing the loss in energy transfer by optical pumping.
Moreover, they can act as intermediary between electron and photon
manipulations, therefore enabling a potential integration of photonic
systems in existing electronic circuit technology.
The quantum dot waveguides (QDWs) presented here are
composed of an array of densely packed QDs deposited on a