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March 11, 2008

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kurt9

Guys,

Hold your horses.

This device can only operate at temperatures near absolute zero. Like all of the other nano-mechanical stuff that has been done, none of it can work anywhere near room temperature.

I will be impressed (and convinced that it is real) once they can make such a system to work at room temperature. Until then, I maintain that the future is wet and squishy rather than dry and hard (think Blade Runner instead of Terminator).

Mike Treder, CRN

Kurt, the article at LiveScience states:

The device needs to be made in vacuum conditions at extremely cold temperatures — about -321 degrees F (-196 degrees C). Bandyopadhyay said it could be operated at room temperature, however.

So, yes, very low temps are required to build the device, but it can, according to the lead scientist, "be operated at room temperature."

Brian

The MSNBC article also mentions that the researchers believe within 18 months they expect to have 1024 of the devices working together. Mark Ratner indicated that Nanoink (maker of massively parallel dip pen lithography arrays) has one of the options for input and output [from macroscale to the devices and back]. A promising architecture and approach for more powerful computing and devices. they talk not just of computing but other kinds of devices.

kurt9

Mike,

I would like to know more about its operation. I would have to purchase the article for that. More likely, I can go to the university research library and read the article. If it works as advertised, it does represent a partial step to validating mechano-nanotechnology. However, full validation of this concept does require both fabrication as well as operation at room temperature.

kurt9

I do not want to be critical of the applications of this device or this technology. This could very well prove to be the next step in electronics technology. Certainly the information storage and manipulation capabilities of this goes way beyond anything envisioned by Drexler and company back in the day.

I noticed that this device was assembled at liquid Nitrogen temperature, not near absolute zero. Liquid nitrogen cryogenics is cheap, unlike the absolute zero regime. I can see a fab line using cryogenic vacuum environment to make these things commercially. In this sense, the manufacturing economies would be no different than conventional semiconductor or MEMS process technology.

the oakster1

I don't see your worry about cryogenic temperatures. Like materials acting differently on nanoscales, cooler temperatures at the nanoscales is not so hard or expensive. Of course, this device is still connected to the macroscale by an stm, but that is a problem that will surelly be soon corrected.

Drexler's daimondoid machiens work in vacuum - the coldest temperatures!

Dan S

I can't read original article (no subscription to PNAS), but it seems to be this device does not actually *computed* anything. It's not immediately apparent how to make switches or logic gates from it (is that architecture really Turing complete?).

Dan S

to oakster1: vacuum does not mean "coldest temperatures" - molecular machines in vacuum could still be heated by IR radiation and power provided to them also dissipates as heat. In fact devices from Drexler's Nanosystems are designed to operate at room temperature.

Brian Wang

I believe they are not yet computing. But there is a lot of related molecular electronics work where I believe suitable modifications can be made to the chemical strucure to enable computation and memory and other eight+ nanodevice types that they have identified to operate. It is a promising architecture which we can see how well it progresses over the next 18 months with the researchers goal of 1024 interconnected devices and collaboration on input and output methods.

John Akers

How does this stack up to quantum computers in terms of speed?

John Akers

Brian

Quantum computers can handle different kinds of algorithms. so for certain kinds of problems quantum computers would be superior to a molecular classical computer. A molecular classical computer like this would be could be a million times faster than the best petaflop machines that we have now. Estimates for the human brain are 100 teraflop to 20 petaflops.

http://vadim.oversigma.com/MAS862/Project.html

A large quantum computer with millions of qubits or more would be able to process certain problems faster.
If the qubits could allow say a problem to be solved as the square root of n * n where is the qubits versus the best classical algorithm which might be some exponential function or X**3 or something. then you could see when X**0.333 (where X is the flops of the molecular computer, change the functions based on the kind of problem) is less than n qubits.

LarryLarryLarry

This headline is disgraceful. You people are liars, plain and simple. There is no computer at all, much less a powerful one. You're all sitting around making up technologies which don't even exist yet, to be paired with this molecular arrangement, in order to make a "powerful computer".

Nothing good can come from wildly exaggerating and lying about technology when the facts are in plain view for all to see.

Pure hype and not even remotely convincing.

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