U think T1000 is impossible? The robot which can change shape
in
Terminator 2. Think again. What was considered science fiction 50
years ago are reality now. T1000 is frigteningly possible through
the use of DNA and molecular electronics
molecular transistors which can integrate into substances that are
flexibe in nature like mercury and water can produce a "robot or
computer" with the ability to process calculations! u will be able
to see liquids or mercury changing shape, moving and able to think
like robots and computers .
The ability of DNA to transfer electrons through the center of the
double helix has been established by recent experiments. As
biologists figure out what this means for medicine, nanoscientists
are using DNA to assemble nanoelectronic devices. Several methods
are available for using DNA a nanomechanical control system. The
latest research into the mechanical properties movement of DNA is
discussed with references, in particular, in vivo implications of
supercoiling as an ionic switch.
Numerous molecules that can function as molecular scale wires [11],
switches [12], transistors [13], and much more [7] have been
characterized both by molecular simulations [14] and experiments
[15]. Most of these molecular components have already been
synthesized and characterized with traditional chemical methods,
thus providing a supply of components that can be mass produced on
the order of Avagadro's number (1 mole = 6*1023 molecules). So, you
might ask: why do our computers still have only millions of
transistors per chip? Major obstacles keeping molecular electronics
from being feasible today can be divided into two categories:
integration and interfacing.
Integration of the components involves molecular assembly, also
known as supramolecular chemistry. Rather than patterning two
dimensional semiconductor surfaces with doped regions, as is
currently staple in silicon-based microelectronics, molecular
electronics would have to assemble discrete molecular components
into functional circuitry. Although tools such as scanning probe
microscopy have demonstrated the possibility of manipulating single
molecules, parallel methods of integration such as self-assembly
and directed assembly are more promising aproaches [16]. While
traditional chemistry and current methods of self-assembly result
in imperfect circuitry [17], improvements in nanoscale chemistry
are rapidly advancing [18].
Interfacing involves reading and writing to the molecular
electronic devices. Being so small, there must be a way for us to
communicate with the device by writing our input and reading the
output. There are numerous methods that might be used for
interfacing molecular electronic devices with our current
microtechnology. Optical methods for interfacing seem to be one of
the more promising aproaches. For instance, Martini et. al. [19]
has demonstrated that electron transfer reactions can be controlled
with femtosecond laser pulses. With lasers being one of the more
coherent tools for reading and writing, optical interfacing may
provide a convenient method for interacting with quantum devices
[20].
