News

Scientists Take Step Toward Molecular Electronics

Researchers at the National Institute of Standards and Technology (NIST) have built working electronic devices using a thin layer of organic molecules on a traditional silicon platform, setting the stage for the next step toward practical molecular electronics.

If advances in computing power and speed are to continue as they have in recent decades, integrated circuits will have to break the size barrier presented by traditional complementary metal-oxide semiconductors (CMOS).

Molecular electronics is one of the possible avenues for advancement. The NIST research is being funded in part by the Defense Advanced Research Projects Agency.

"Molecules are the ultimate in scaling," said Curt Richter, lead of NIST's Nanoelectronic Devices Metrology project and a member of the team that built the tiny resistors. "They are not ready yet, but they are the smallest thing mankind can engineer."

But for the engineering of practical molecular components, scientists would have to work with existing commercial chip materials and manufacturing processes, said Nadine Gergel-Hackett, a research associate at the National Research Center. "If it is to be realized, the first step would be a hybrid" of silicon substrate, typically used in CMOS, coupled with organic molecules.

But the traditional silicon crystal structure used in CMOS is "viewed as not chemically friendly," Richter said. Because of this, little research has been done with layering organic molecules onto them. So the team's first job was to show it was possible to use common silicon substrates.

The team, which includes Gergel-Hackett, Curt Richter, L.J. Richter, C.D. Zangmeister and C.A. Hacker, describe their work in a paper in the April issue of the Journal of the American Chemical Society.

"We demonstrated that you can assemble the molecules just as well" on the "technologically relevant" CMOS substrate as on specially designed chip materials, Curt Richter said.

But is "just as well" good enough? "That's why we fabricated the devices," Gergel-Hackett said. "Our definition of 'good enough' is 'good enough to use in a device.'"

And it worked. The team fabricated two molecular electronic devices, each with a single-molecule layer of carbon chains. They used chains in different lengths for each device. Both demonstrated the ability to resist electronic flow, with the longer chains offering greater resistance, as expected.

The next step is to fabricate a CMOS-molecular hybrid circuit to show that molecular electronic components can work alongside current microelectronic technologies. The research is focused on developing components for high-performance computing and it will still be quite a while before this technology is commercialized, the researchers said.

About the Author

William Jackson is the senior writer for Government Computer News (GCN.com).

Featured

  • SameSite Cookie Changes Rolled Back Until Summer

    The Chromium Project announced on Friday that it's delaying enforcement of SameSite cookie changes, and is temporarily rolling back those changes, because of the COVID-19 turmoil.

  • Basic Authentication Extended to 2H 2021 for Exchange Online Users

    Microsoft is now planning to disable Basic Authentication use with its Exchange Online service sometime in the "second half of 2021," according to a Friday announcement.

  • Microsoft Offers Endpoint Configuration Manager Advice for Keeping Remote Clients Patched

    Microsoft this week offered advice for organizations using Microsoft Endpoint Configuration Manager with remote Windows systems that need to get patched, and it also announced Update 2002.

  • Azure Edge Zones Hit Preview

    Azure Edge Zones, a new edge computing technology from Microsoft designed to enable new scenarios for developers and partners, emerged as a preview release this week.

comments powered by Disqus

Office 365 Watch

Sign up for our newsletter.

Terms and Privacy Policy consent

I agree to this site's Privacy Policy.