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:6/23/2016)... ... June 23, 2016 , ... ... of its second eBook, “Clinical Trials Patient Recruitment and Retention Tips.” Partnering with ... in this eBook by providing practical tips, tools, and strategies for clinical researchers. ...
(Date:6/23/2016)... , June 23, 2016   Boston Biomedical ... novel compounds designed to target cancer stemness pathways, ... been granted Orphan Drug Designation from the U.S. ... of gastric cancer, including gastroesophageal junction (GEJ) cancer. ... designed to inhibit cancer stemness pathways by targeting ...
(Date:6/23/2016)... Md. , June 23, 2016 A person ... from the crime scene to track the criminal down. ... the U.S. Food and Drug Administration (FDA) uses DNA evidence ... Sound far-fetched? It,s not. The FDA ... sequencing to support investigations of foodborne illnesses. Put as simply ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... and Mold) microbial test has received AOAC Research Institute approval 061601. , “This ... introduced last year,” stated Bob Salter, Vice President of Regulatory and Industrial Affairs. ...
Breaking Biology Technology:
(Date:3/31/2016)...   LegacyXChange, Inc. ... LegacyXChange is excited to release its first ... be launched online site for trading 100% guaranteed authentic ... also provide potential shareholders a sense of the value ... industry that is notorious for fraud. The video is ...
(Date:3/23/2016)... , March 23, 2016 ... erhöhter Sicherheit Gesichts- und Stimmerkennung mit Passwörtern ... (NASDAQ: MESG ), ein führender ... das Unternehmen mit SpeechPro zusammenarbeitet, um erstmals ... Finanzdienstleistungsbranche, wird die Möglichkeit angeboten, im Rahmen ...
(Date:3/21/2016)... Massachusetts , March 22, 2016 ... facial recognition with passcodes for superior security   ... ), a leading provider of secure digital communications services, ... their biometric technology and offer enterprise customers, particularly those ... secure facial recognition and voice authentication within a mobile ...
Breaking Biology News(10 mins):