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New transistors: An alternative to silicon and better than graphene (molybdenite)
Ecole Polytechnique Fédérale de Lausanne ^ | January 30, 2011 | Unknown

Posted on 01/30/2011 11:18:33 AM PST by decimon

Smaller and more energy-efficient electronic chips could be made using molybdenite, a material developed in Switzerland

Smaller and more energy-efficient electronic chips could be made using molybdenite. In an article appearing online January 30 in the journal Nature Nanotechnology, EPFL's Laboratory of Nanoscale Electronics and Structures (LANES) publishes a study showing that this material has distinct advantages over traditional silicon or graphene for use in electronics applications.

A discovery made at EPFL could play an important role in electronics, allowing us to make transistors that are smaller and more energy efficient. Research carried out in the Laboratory of Nanoscale Electronics and Structures (LANES) has revealed that molybdenite, or MoS2, is a very effective semiconductor. This mineral, which is abundant in nature, is often used as an element in steel alloys or as an additive in lubricants. But it had not yet been extensively studied for use in electronics.

100,000 times less energy

"It's a two-dimensional material, very thin and easy to use in nanotechnology. It has real potential in the fabrication of very small transistors, light-emitting diodes (LEDs) and solar cells," says EPFL Professor Andras Kis, whose LANES colleagues M. Radisavljevic, Prof. Radenovic et M. Brivio worked with him on the study. He compares its advantages with two other materials: silicon, currently the primary component used in electronic and computer chips, and graphene, whose discovery in 2004 earned University of Manchester physicists André Geim and Konstantin Novoselov the 2010 Nobel Prize in Physics.

One of molybdenite's advantages is that it is less voluminous than silicon, which is a three-dimensional material. "In a 0.65-nanometer-thick sheet of MoS2, the electrons can move around as easily as in a 2-nanometer-thick sheet of silicon," explains Kis. "But it's not currently possible to fabricate a sheet of silicon as thin as a monolayer sheet of MoS2." Another advantage of molybdenite is that it can be used to make transistors that consume 100,000 times less energy in standby state than traditional silicon transistors. A semi-conductor with a "gap" must be used to turn a transistor on and off, and molybdenite's 1.8 electron-volt gap is ideal for this purpose.

Better than graphene

In solid-state physics, band theory is a way of representing the energy of electrons in a given material. In semi-conductors, electron-free spaces exist between these bands, the so-called "band gaps." If the gap is not too small or too large, certain electrons can hop across the gap. It thus offers a greater level of control over the electrical behavior of the material, which can be turned on and off easily.

The existence of this gap in molybdenite also gives it an advantage over graphene. Considered today by many scientists as the electronics material of the future, the "semi-metal" graphene doesn't have a gap, and it is very difficult to artificially reproduce one in the material.

###

For more information:

Nature Nanotechnology: http://www.nature.com/nnano/index.html

Direct link to the article: http://dx.doi.org/10.1038/nnano.2010.279

Contact: Professor Andras Kis, Laboratory of Nanoscale Electronics and Structures (LANES), andras.kis@epfl.ch, tel: +41 21 693 39 25

Other links:

Groups which were involved in or supported this research:

LANES (http://lanes.epfl.ch)

LBEN (http://lben.epfl.ch)

European Research Council (http://erc.europa.eu/)


TOPICS: Computers/Internet; Science
KEYWORDS: graphene; molybdenite

Caption: This is a digital model showing how molybdenite can be integrated into a transistor.

Credit: Credit: EPFL

Usage Restrictions: With Mention

1 posted on 01/30/2011 11:18:39 AM PST by decimon
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To: SunkenCiv

More Moore ping.


2 posted on 01/30/2011 11:19:20 AM PST by decimon
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To: decimon

bookmark


3 posted on 01/30/2011 11:32:42 AM PST by Free Vulcan (Vote conservative! You can vote Democrat when you're dead.)
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To: decimon

Moore’s Law, states that the number of transistors on a chip will double about every two years.

Every-time we think we reached our limit, something new appears on the horizon.


4 posted on 01/30/2011 11:33:29 AM PST by BushCountry (I spoken many wise words in jest, but no comparison to the number of stupid words spoken in earnest)
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To: decimon

There is a shortage of Molybdenum, as referenced in this article from 2009. My friend’s spouse works for a pharmaceutical company and struggles to find the molybdenum required for medications mixed that are used for heart procedures.
http://www.news-medical.net/news/20090805/World-shortage-of-molybdenum-may-hinder-nuclear-medicine-services.aspx


5 posted on 01/30/2011 11:34:18 AM PST by All Blue State
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To: decimon

A whole mountain of molybdenite has been found in Alaska.. also gold, silver and copper..

http://en.wikipedia.org/wiki/Pebble_Mine


6 posted on 01/30/2011 11:35:00 AM PST by hosepipe (This propaganda has been edited to include some fully orbed hyperbole....)
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To: decimon

the 1.8 volt band-gap the article cites would potentially be a fairly big deal. Silicon is .6 - .7 volts. It “could” change a lot of things with regards to circuitry art. I tend to doubt the 1/10,000 current consumption target stated, but it could be 1/100th.


7 posted on 01/30/2011 11:36:19 AM PST by Attention Surplus Disorder ("Looks like I picked the wrong week to quit smoking" - Barack Hussein Obama)
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To: hosepipe

Alas, the habitat of the Alaskan red-bellied gopher is likely to be closed for all future mining activities. [/s]


8 posted on 01/30/2011 11:36:58 AM PST by ClearCase_guy ("Borrowing a trillion is compassionate, cutting a billion is heartless." -- VDH)
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To: All Blue State

That is because Molybdenum currently has a limited scope. Once the big Silicon Manufacturers start demanding an endless supply, someone will build the reactors to meet the demand. In fact, if this is truly going to the most effective means to produce high-powered, low wattage chips, investing in the company that will supply a niche material to meet the demand might be a wise investment.


9 posted on 01/30/2011 11:42:25 AM PST by BushCountry (I spoken many wise words in jest, but no comparison to the number of stupid words spoken in earnest)
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To: hosepipe

That’s great but I do not dismiss the environmental concerns. If the cost of not leaving behind a wasteland is built into the cost of the minerals then so be it.


10 posted on 01/30/2011 11:44:18 AM PST by decimon
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To: decimon

The bulk of the poor environmental track record of mining industry is from a time before current technologies and regulations. Enforce the strict rules, use the latest technology and billions can be dumped into our economy safely. Every environmental issue is hyperbole and based on what might happened. Same excuses for not drilling in the Gulf or harvesting the vast oil reserves we have in shale. With the middle east exploding we can not afford being resource dependent.


11 posted on 01/30/2011 11:56:31 AM PST by BushCountry (I spoken many wise words in jest, but no comparison to the number of stupid words spoken in earnest)
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To: ClearCase_guy
[ Alas, the habitat of the Alaskan red-bellied gopher is likely to be closed for all future mining activities. [/s] ]

The last Alaskan red bellied gopher died with Ted Stevens in an airplane accident recently..

12 posted on 01/30/2011 11:57:21 AM PST by hosepipe (This propaganda has been edited to include some fully orbed hyperbole....)
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To: decimon

I think Molybdenite explains time travel.

13 posted on 01/30/2011 11:59:04 AM PST by Sawdring
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To: decimon

Small FET


14 posted on 01/30/2011 12:02:34 PM PST by sionnsar (IranAzadi|5yst3m 0wn3d-it's N0t Y0ur5:SONY|Why are TSA exempt from their own searches?)
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To: BushCountry
The bulk of the poor environmental track record of mining industry is from a time before current technologies and regulations. Enforce the strict rules, use the latest technology and billions can be dumped into our economy safely. Every environmental issue is hyperbole and based on what might happened. Same excuses for not drilling in the Gulf or harvesting the vast oil reserves we have in shale. With the middle east exploding we can not afford being resource dependent.

As long as the taxpayer doesn't get stuck with the bill for cleanup. As long as Todd Palin doesn't have to take a factory job for there being no fish.

15 posted on 01/30/2011 12:07:24 PM PST by decimon
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To: decimon
As long as the taxpayer doesn't get stuck with the bill for cleanup.

A statement like this drives me nuts. First, no taxpayer gets stuck with one individual project or cleanup. Taxpayers get stuck with one large massive bill (this year 4.6 Trillion dollars).

If this project brings in 10 billion in extra revenue and the government has to spend 200 million to clean up an area using the slush fund, then the government is still 9.8 billion to the good. However, people scream we are using tax payer's money to clean it up because the government already spent the 10 billion funding sex education on our kindergartners.

16 posted on 01/30/2011 12:22:16 PM PST by BushCountry (I spoken many wise words in jest, but no comparison to the number of stupid words spoken in earnest)
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To: decimon
that it can be used to make transistors that consume 100,000 times less energy in standby state

Ok, that's when it's not doing anything. Is there any benefit when it is actually doing its job?

17 posted on 01/30/2011 12:28:36 PM PST by Moltke (Always retaliate first.)
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To: BushCountry
If this project brings in 10 billion in extra revenue and the government has to spend 200 million to clean up an area using the slush fund, then the government is still 9.8 billion to the good. However, people scream we are using tax payer's money to clean it up because the government already spent the 10 billion funding sex education on our kindergartners.

This has nothing to do with sex education and my point has nothing to do with your socialistic reasoning. My capitalist, all-American point is that you pay for what you do.

18 posted on 01/30/2011 12:33:48 PM PST by decimon
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To: hosepipe
They proposed opening a mine at the Mysty Fjords area of Alaska, but it was in conflict with Wilderness values.
19 posted on 01/30/2011 12:40:56 PM PST by marsh2
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To: Moltke
that it can be used to make transistors that consume 100,000 times less energy in standby state

Ok, that's when it's not doing anything. Is there any benefit when it is actually doing its job?

The article doesn't say but there may not be any benefit when in an active state. It may be that the standby state is the predominant state but I don't know. I suspect that the circuits in my PC are mostly in standby cuz I'm a boring guy.

20 posted on 01/30/2011 12:43:12 PM PST by decimon
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To: decimon
My capitalist, all-American point is that you pay for what you do.

I wish that was all I paid for; my tax bill would be 1/20th of its current size. Instead, I'm stuck paying for what millions of other incompetent, greedy or lazy people did or didn't "do".

21 posted on 01/30/2011 12:45:59 PM PST by NittanyLion
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To: All Blue State
There is a shortage of Molybdenum, as referenced in this article from 2009

Climax, Colorado
The Climax mine, located in Climax, Colorado, United States, was a major molybdenum mine in Lake and Summit counties, Colorado. In its heyday, the Climax mine was the largest molybdenum mine in the world, and for many years it supplied three-fourths of the world's supply of the metal. The mine is currently (2010) inactive, but may reopen when the economy recovers

22 posted on 01/30/2011 12:59:49 PM PST by Uri’el-2012 (Psalm 119:174 I long for Your salvation, YHvH, Your law is my delight.)
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To: decimon

“transistors that consume 100,000 times less energy”

Well there you go. Greenistors.


23 posted on 01/30/2011 1:00:22 PM PST by bigbob
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To: decimon
..the brain should be able to do about 10 exp12 to 10 exp14 operations per second ...other estimates 10 exp16 synapse operations per second...

...new Supercomputer Can Do 50 Trillion Operations (10 exp12) Per Second...


It seems we are getting there slowly.


24 posted on 01/30/2011 1:04:44 PM PST by Koracan
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To: marsh2
[ They proposed opening a mine at the Mysty Fjords area of Alaska, but it was in conflict with Wilderness values. ]

Wilderness values is Utopian nonsense.. democrat double-talk.. progressive propaganda.

25 posted on 01/30/2011 1:08:51 PM PST by hosepipe (This propaganda has been edited to include some fully orbed hyperbole....)
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To: theKid51

ping


26 posted on 01/30/2011 1:09:36 PM PST by bmwcyle (It is Satan's fault)
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To: bigbob
“transistors that consume 100,000 times less energy”

Well there you go. Greenistors.

Less energy consumed should mean less heat produced. When reading about Intel's and AMD's new architectures, I read that large server operations are, if you will, hot for those architectures for their consuming less electricity and producing less heat.

27 posted on 01/30/2011 1:15:55 PM PST by decimon
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To: UriÂ’el-2012

—the milling part of the operation is being rebuilt and they are advertising for miners-—if I wasn’t seventy I’d go back in a minute—worked there 17 years-—


28 posted on 01/30/2011 2:03:05 PM PST by rellimpank (--don't believe anything the media or government says about firearms or explosives--)
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To: rellimpank
—the milling part of the operation is being rebuilt and they are advertising for miners-—if I wasn’t seventy I’d go back in a minute—worked there 17 years-—

Did or do you know Harry Smith of BV ?

29 posted on 01/30/2011 2:20:18 PM PST by Uri’el-2012 (Psalm 119:174 I long for Your salvation, YHvH, Your law is my delight.)
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To: UriÂ’el-2012

—name is familiar—I left in 1977 before the bust-—


30 posted on 01/30/2011 2:48:47 PM PST by rellimpank (--don't believe anything the media or government says about firearms or explosives--)
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To: decimon

This is a press release.

I am still waiting for the various Algea to gasoline press releases to make any impact.


31 posted on 01/30/2011 3:58:38 PM PST by NoLibZone (Five time DNC backed candidate Fred Phelps: "God sent the shooter".)
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To: decimon; Ernest_at_the_Beach; blam

Thanks decimon. I’m just glad it wasn’t another graphene topic. ;’)


32 posted on 01/30/2011 4:42:01 PM PST by SunkenCiv (The 2nd Amendment follows right behind the 1st because some people are hard of hearing.)
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To: SunkenCiv
Thanks decimon. I’m just glad it wasn’t another graphene topic. ;’)

Yeah, that graphene sex and violence is getting out of hand.

33 posted on 01/30/2011 5:15:34 PM PST by decimon
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To: decimon
Very cool; thanks for posting. I need some MoS2 FETs to try out!
34 posted on 01/30/2011 5:31:12 PM PST by backwoods-engineer (Any politician who holds that the state accords rights is an oathbreaker and an "enemy... domestic.")
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To: Attention Surplus Disorder
the 1.8 volt band-gap the article cites would potentially be a fairly big deal. Silicon is .6 - .7 volts.

It sure would be cool to have a bandgap reference made out of MoS2. You could have a stable, temperature-proportional voltage reference without current mirrors which add noise.

35 posted on 01/30/2011 5:50:01 PM PST by backwoods-engineer (Any politician who holds that the state accords rights is an oathbreaker and an "enemy... domestic.")
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To: decimon

Some folks probably missed 'em, so...
36 posted on 01/30/2011 6:54:36 PM PST by SunkenCiv (The 2nd Amendment follows right behind the 1st because some people are hard of hearing.)
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To: hosepipe
Wilderness values is Utopian nonsense.. democrat double-talk.. progressive propaganda.

But a true Conservative is intelligent and principled enough to both mine and preserve the environment, (i.e. resoil, replant, and effectively remove toxic waste). A good Conservative is conservative with the environment. We ARE the champions!

37 posted on 05/16/2012 7:14:46 PM PDT by Bellflower (The LORD is Holy, separated from all sin, perfect, righteous, high and lifted up.)
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To: Bellflower

[ But a true Conservative is intelligent and principled enough to both mine and preserve the environment ]

A true conservative is not conservative but a radical..
They want radical change in Washington D.C. not conservative change..

The word conservative was invented by progressives to highlight their enemies..

Conservatives (that use this word) have been brain washed by liberal progressives..
And most are ignorant of this or deny it..

People “you know”..... LIKE YOU..


38 posted on 05/17/2012 10:30:20 AM PDT by hosepipe (This propaganda has been edited to include some fully orbed hyperbole...)
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