Currently, the gate length, the characteristic length parameter in
transistors, has hit about 90 nm. The shorter the gate length, the faster
transistors can switch on and off. In fact, the transistors have gotten so
fast, that the delay as electrons flow through the skinnier and longer
wires needed to cross larger, complex chips is on track to become the
limiting factora in speed. This delay is just one of the fundamental
problems that threatens to make the nanoscale regime of electronics
unfaithful to Moore's Law and demands the design of new materials and
structures or a complete ****ft in chip architecture.
Hello,
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18 Stanford Scientific Review successfully demonstrated their use as
highly sensitive toxic gas sensors, and with Professor Calvin Quate
(Electrical Engineering), has commercialized nanotubes as scanning probe
tips to increase probe resolution and tip durability. An area that Dai has
just begun exploring is the drug delivery potential of carbon nanotubes.
"The tube has a large surface area and is empty inside. So either you can
attach the drug to the outer surface, or fill it up like a test tube," says
Dai. Furthermore, multiple functional molecules can be attached to the
surface: "Say, a molecule that fluoresces to tell you where the drug is in
the cell and an antibody that specifically targets the site of drug
delivery." So far, Dai re****ts that his research finds nanotubes to be
quite "biologically friendly."
Currently, the gate length, the characteristic length parameter in
transistors, has hit about 90 nm. The shorter the gate length, the faster
transistors can switch on and off. In fact, the transistors have gotten so
fast, that the delay as electrons flow through the skinnier and longer
wires needed to cross larger, complex chips is on track to become the
limiting factora in speed. This delay is just one of the fundamental
problems that threatens to make the nanoscale regime of electronics
unfaithful to Moore's Law and demands the design of new materials and
structures or a complete ****ft in chip architecture.
Just this April, a large cross-departmental group of Stanford faculty was
awarded a multi-million dollar grant to take up such challenges and develop
new devices and technology for use in 3-D ICs. Chidsey, for instance, is
one of the researchers involved in integrating nanowire transistors into
3-D circuits, which requires being able to position nanowires reliably and
accurately. With the development of 3-D ICs, you can expect all-in-one MP3
player-telephone-digital camera-PDA devices the size of Star Trek
communicators to hit the shelves at Fry's within this decade.
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