Navigation Links
Michigan Tech scientist models molecular switch
Date:6/16/2008

HOUGHTON, Mich.--Michigan Technological University physicist Ranjit Pati and his team have developed a model to explain the mechanism behind computing's elusive Holy Grail, the single molecular switch.

If born out experimentally, his work could help explode Moore's Law and could revolutionize computing technology.

Moore's Law predicts that the number of transistors that can be economically placed on an integrated circuit will double about every two years. But by 2020, Moore's Law is expected to hit a brick wall, as manufacturing costs rise and transistors shrink beyond the reach of the laws of classical physics.

A solution lies in the fabled molecular switch. If molecules could replace the current generation of transistors, you could fit more than a trillion switches onto a centimeter-square chip. In 1999, a team of researchers at Yale University published a description of the first such switch, but scientists have been unable to replicate their discovery or explain how it worked. Now, Pati believes he and his team may have found the mechanism behind the switch.

Applying quantum physics, he and his group developed a computer model of an organometallic molecule firmly bound between two gold electrodes. Then he turned on the juice.

As the laws of physics would suggest, the current increased along with the voltage, until it rose to a miniscule 142 microamps. Then suddenly, and counterintuitively, it dropped, a mysterious phenomenon known as negative differential resistance, or NDR. Pati was astonished at what his analysis of the NDR revealed.

Up until the 142-microamp tipping point, the molecule's cloud of electrons had been whizzing about the nucleus in equilibrium, like planets orbiting the sun. But under the bombardment of the higher voltage, that steady state fell apart, and the electrons were forced into a different equilibrium, a process known as "quantum phase transition."

"I never thought this would happen," Pati said. "I was really excited to see this beautiful result."

Why is this important? A molecule that can exhibit two different phases when subjected to electric fields has promise as a switch: one phase is the "zero" and the other the "one," which form the foundation of digital electronics.


'/>"/>

Contact: Marcia Goodrich
mtunews@mtu.edu
906-487-2343
Michigan Technological University
Source:Eurekalert

Related biology technology :

1. Ash Stevens Inc. Named One of Michigan 50 Companies to Watch
2. Beaumont Hospitals in Michigan Selects Halogen Software for Pay for Performance System
3. Lambert, Edwards & Associates Named Agency of Record for The West Michigan Science & Technology Initiative
4. West Michigan Science & Technology Initiative Seeks Exhibitors for Annual Life Science Showcase
5. Ann Arbor SPARK Receives $3.75M from Michigans Company Formation & Growth Fund
6. Michigan Life Science Network: Virtual Companies Get Global Reception
7. Michigan Catholic Conference Responds to Formation of Embryonic Stem Cell Research Ballot Committee
8. Michigan Life Science Network to Form Two New Virtual Companies
9. MichBio Announces Student Career Day at Michigan State University
10. MichBio Issues 2007/8 Michigan Life Sciences Directory and Resources Guide
11. Michigan Life Sciences Pipeline to Kick Off MichBio Expo
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/22/2017)... ... September 22, 2017 , ... ... will host a booth at premier packaging event PACK EXPO International in Las ... Packaging Machinery Manufacturers Institute (PMMI). , At this year’s PACK EXPO at the ...
(Date:9/21/2017)... ... ... Greg Leyer, Chief Scientific Officer of UAS Labs, will be presenting at SupplySide West ... Probiotics Resource Center, Mandalay Bay Expo Hall. , “I am very pleased to ... data in areas outside the gut including heart health, Vitamin D status, upper respiratory ...
(Date:9/21/2017)... ... September 21, 2017 , ... When a downtown Greenville ... was swift and efficient thanks to the continuing efforts of members of the ... more than 50 stakeholders, including officials from area counties and cities, Renewable Water ...
(Date:9/20/2017)... ... September 20, 2017 , ... Diversity focused business accelerator, ... Fueling the Growth pitch competition to uncover the top technology-driven, women-led startups in Boston, ... integral part of each city’s entrepreneurial events going on that week – in Boston, ...
Breaking Biology Technology:
(Date:4/5/2017)... 2017 KEY FINDINGS The global ... a CAGR of 25.76% during the forecast period of ... factor for the growth of the stem cell market. ... MARKET INSIGHTS The global stem cell market is ... geography. The stem cell market of the product is ...
(Date:3/30/2017)... YORK , March 30, 2017 Trends, ... type (physiological and behavioral), by technology (fingerprint, AFIS, iris ... voice recognition, and others), by end use industry (government ... and immigration, financial and banking, and others), and by ... Europe , Asia Pacific , ...
(Date:3/24/2017)... , Mar 24, 2017 Research and Markets ... System Market Analysis & Trends - Industry Forecast to 2025" ... ... grow at a CAGR of around 15.1% over the next decade ... industry report analyzes the market estimates and forecasts for all the ...
Breaking Biology News(10 mins):