Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > The feature size and functional range of molecular electronic devices: Monitoring the transition from tunneling leakage current to molecular tunneling

The tunneling leakage is a major quantum obstacle which hinders further miniaturization of electronic devices. To explore the miniaturization limits of molecular electronics, the oligo(aryleneethynylene) (OAE) molecules were employed to investigate the transition between through-space tunneling and molecular tunneling. For the shortest OAE molecule, the intrinsic single-molecule charge transport can be outstripped from tunneling leakage at 0.66 nm, suggesting the potential to push the miniaturization limit of molecular electronic devices to the angstrom scale.

CREDIT
Xiamen University
The tunneling leakage is a major quantum obstacle which hinders further miniaturization of electronic devices. To explore the miniaturization limits of molecular electronics, the oligo(aryleneethynylene) (OAE) molecules were employed to investigate the transition between through-space tunneling and molecular tunneling. For the shortest OAE molecule, the intrinsic single-molecule charge transport can be outstripped from tunneling leakage at 0.66 nm, suggesting the potential to push the miniaturization limit of molecular electronic devices to the angstrom scale. CREDIT Xiamen University

Abstract:
Advances of miniaturization in electronics have created dramatic impacts on the industrial innovations and our lives. Nowadays, the semiconductor industry has been devoted to scaling down the feature size of electronic devices to the scale of sub-5 nm. Moore's Law, however, has not been the only priority in semiconductor industry because of some inevitable quantum obstacles which hinder the further miniaturization and integration, such as the tunneling leakage current and the thermal dissipation. As a candidate of the supplementary support and even replacement for future electronic device, the bottom-up strategy to use single molecules as charge transport component can be promising, as the primary molecular elements for building single-molecule electronic components in electronic circuitry possess the intrinsic charge transport properties to overcome the tunneling leakage between the same scale of nanogap distance. Nevertheless, knowing the feature size of the domination of tunneling leakage in molecular electronics is of fundamental significance, which enhances the understanding of the technical limitations and boundaries for using single-molecule components as electronic devices.

The feature size and functional range of molecular electronic devices: Monitoring the transition from tunneling leakage current to molecular tunneling

Xiamen, China | Posted on December 16th, 2018

By employing a series of oligo(aryleneethynylene) (OAE) derivatives with different numbers of repeating units of ethynylphenyl as molecular ruler, we used mechanically controllable break junction technique to investigate the dominant size ranges of the through-space tunneling (tunneling leakage between the source and drain electrode) and molecular tunneling of single-molecule junctions. To avoid the inevitable snap-back effect during the electrode stretching, which might hinder the detection of some molecular junction configurations at the initial stage of gap opening, we chose the electrode gap closing process to provide precise determination of the electrode-electrode distance for the conductance-nanogap size correlation. Hence, by screening this series of OAE molecules, a correlation of the characterized conductance of the molecules with different lengths and configurations is investigated, and the transition between through-space tunneling and molecular tunneling is quantitatively determined.

By retrieving the most probable conductance-distance evolution from conductance-distance histogram of molecular junction, which we called "master curve", we found direct transition between through-space dominated transport and molecular tunneling dominated transport. Therefore, with the molecular length increases, the effective nanogap distance range where the single-molecule devices properly function, which the molecular tunneling dominated, for each OAE molecule is 0.66~1.2 nm for OAE2, 0.91~1.9 nm for OAE3, 1.2~2.5 nm for OAE4 and 1.5~3.3 nm for OAE5, respectively. These findings suggest that in future single-molecule electronics, to use the intrinsic properties of the target molecules, nanogaps within two terminals must reach a certain range of size according to the target molecules to outstrip the tunneling leakage current. On the other hand, for the smallest OAE2, we obtained a feature size of below 0.66 nm, suggesting the shrinking limit for using molecular electronic device. "These conclusions suggest that assembling conjugated molecules with bottom up strategy for molecular electronics are highly promising for future miniaturization of electronic devices." says Junyang Liu, the first author of the study, who dose his postdoctoral research in Collaborative Innovation Center of Chemistry for Energy Materials, China.

####

For more information, please click here

Contacts:
Wenjing Hong

86-059-221-80680

Copyright © Xiamen University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE:

Related News Press

News and information

The lightest shielding material in the world: Protection against electromagnetic interference July 3rd, 2020

Spintronics: Faster data processing through ultrashort electric pulses July 3rd, 2020

A path to new nanofluidic devices applying spintronics technology: Substantial increase in the energy conversion efficiency of hydrodynamic power generation via spin currents July 3rd, 2020

Towards lasers powerful enough to investigate a new kind of physics: An international team of researchers has demonstrated an innovative technique for increasing the intensity of lasers July 3rd, 2020

Hardware

A Carbon Nanotube Microprocessor Mature Enough to Say Hello: Three new breakthroughs make commercial nanotube processors possible March 2nd, 2020

Powering the future: Smallest all-digital circuit opens doors to 5 nm next-gen semiconductor February 11th, 2020

SUNY Poly Professor Partners with Leading Institutions on NSF Award for Quantum Information Science Research: SUNY Poly Research Builds Upon Recent Quantum-related Research Initiatives and Workshops January 27th, 2020

Do you Kyoto? World-leading companies share their approaches to environmentally friendly business at NAUMí19 October 14th, 2019

Govt.-Legislation/Regulation/Funding/Policy

Towards lasers powerful enough to investigate a new kind of physics: An international team of researchers has demonstrated an innovative technique for increasing the intensity of lasers July 3rd, 2020

Carbon-loving materials designed to reduce industrial emissions July 3rd, 2020

Charcoal a weapon to fight superoxide-induced disease, injury: Nanomaterials soak up radicals, could aid treatment of COVID-19 July 2nd, 2020

The nature of nuclear forces imprinted in photons June 30th, 2020

Possible Futures

Spintronics: Faster data processing through ultrashort electric pulses July 3rd, 2020

A path to new nanofluidic devices applying spintronics technology: Substantial increase in the energy conversion efficiency of hydrodynamic power generation via spin currents July 3rd, 2020

Towards lasers powerful enough to investigate a new kind of physics: An international team of researchers has demonstrated an innovative technique for increasing the intensity of lasers July 3rd, 2020

Crystal structure discovered almost 200 years ago could hold key to solar cell revolution July 3rd, 2020

Molecular Nanotechnology

DNA origami to scale-up molecular motors June 13th, 2019

Big energy savings for tiny machines May 24th, 2019

2D gold quantum dots are atomically tunable with nanotubes April 11th, 2019

Insights into magnetic bacteria may guide research into medical nanorobots December 12th, 2018

Chip Technology

Spintronics: Faster data processing through ultrashort electric pulses July 3rd, 2020

A path to new nanofluidic devices applying spintronics technology: Substantial increase in the energy conversion efficiency of hydrodynamic power generation via spin currents July 3rd, 2020

Extensive review of spin-gapless semiconductors: Next-generation spintronics candidates: spin-gapless semiconductors (SGSs) bridge the zero-gap materials and half-metals June 26th, 2020

Process for 'two-faced' nanomaterials may aid energy, information tech June 26th, 2020

Nanoelectronics

Oriented hexagonal boron nitride foster new type of information carrier May 22nd, 2020

A new strategy to create 2D magnetic order April 10th, 2020

Double-walled nanotubes have electro-optical advantages :Rice University calculations show they could be highly useful for solar panels March 27th, 2020

O-FIB: Far-field-induced near-field breakdown for direct nanowriting in an atmospheric environment March 20th, 2020

Announcements

Towards lasers powerful enough to investigate a new kind of physics: An international team of researchers has demonstrated an innovative technique for increasing the intensity of lasers July 3rd, 2020

Crystal structure discovered almost 200 years ago could hold key to solar cell revolution July 3rd, 2020

Flexible material shows potential for use in fabrics to heat, cool July 3rd, 2020

Carbon-loving materials designed to reduce industrial emissions July 3rd, 2020

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

A path to new nanofluidic devices applying spintronics technology: Substantial increase in the energy conversion efficiency of hydrodynamic power generation via spin currents July 3rd, 2020

Towards lasers powerful enough to investigate a new kind of physics: An international team of researchers has demonstrated an innovative technique for increasing the intensity of lasers July 3rd, 2020

Crystal structure discovered almost 200 years ago could hold key to solar cell revolution July 3rd, 2020

Flexible material shows potential for use in fabrics to heat, cool July 3rd, 2020

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project