Waves of Charge Density in Hybrid
Molecular - Semiconductor Structures
Y.B. Gaididei and V.Y. Chekh*
National Technical University of Ukraine
This is an abstract
for a poster to be presented at the
Fifth
Foresight Conference on Molecular Nanotechnology.
There will be a link from here to the full article when it is
available on the web.
One of the key problems for the developing of future molecular
information processing devices is the problem of interface, i.e.
how to make real time information exchange with the molecular
processors. We assume that one of the most prospect directions is
to create molecular devices which could process information by
controlled dynamic structures and nonlinear waves because these
phenomenae are the macroeffects and could be complexly indicated
and controlled in real time.
One possible variant of the design of such a molecular
processor with optic information input is submitted here. We
propose to immobilize the Langmuir-Blodgett film of donor -
mediator chain - acceptor molecular chains on doped semiconductor
structure which to be the substrate of the processor. The
acceptor moleculae must contact with the substrate, the donor
ones have to be covered with thin transparent metal (Au) film. It
is proved that different types of autowave processes and/or
stationary spatially heterogeneous structures could be obtained
in such structures if the electron-conformation interaction in
donor and acceptor moleculae is enough strong. External voltage
applies to molecular film through metal and semiconductor to
provide feedback in the electric circuit of the system; autowave
processes could be initialized and controlled by optic pump of
donor moleculae through transparent metal cover.
It is shown what profiles of doping of semiconductor substrate
are optimum for creation of different types of autowaves. The
scheme of natural experience to observe the dynamics of voltage
changing and propagation of autowaves of charge density in such
structures has been proposed.
The potential computing power of such a molecular processor
has been estimated (we do not discuss in detail the algorithms
possible to be implemented in autowave molecular processors as
well as their current soft- and hardware implementation because
they are out of the frames of the present message). Some problems
which could be actual for the design of the proposed device, for
previous investigations and for design of computing systems which
is this processor included in are discussed.
*Corresponding Address:
Victor Yu. Chekh,16 Polytechnichna Str., Design Office
"Storm", National Technical University of Ukraine
252056 Kiev, Ukraine, ph: +038-044-274-0295, fax :
+038-044-274-1015, email : [email protected]
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