Molecular switch will facilitate the development of pioneering electro-optical devices
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative effort, a team of physicists at the Technical University of Munich has succeeded to use single molecules as switching elements for light signals.
“Switching with just a single molecule brings future electronics one step closer to the ultimate limit of miniaturization,” says nanoscientist Joachim Reichert from the Physics Department of the Technical University of Munich.
DIFFERENT STRUCTURE – DIFFERENT OPTICAL PROPERTIES
The team initially developed a method that allowed them to create precise electrical contacts with molecules in strong optical fields and to address them using an applied voltage. At a potential difference of around one volt, the molecule changes its structure: It becomes flat, conductive and scatters light.
This optical behavior, which strongly depends on the structure of the molecule, is quite exciting for the researchers because the scattering activity – Raman scattering, in this case – can be both observed and, at the same time, switched on and off via an applied voltage.
The researchers used molecules synthesized by a team based in Basel and Karlsruhe. The molecules change their structure in a specific way when they get charged. They are arranged on a metal surface and contacted using the corner of a glass fragment with a very thin metal coating as a tip.
This serves as an electrical contact, light source and light collector, all in one. The researchers used the fragment to direct laser light to the molecule and measure tiny spectroscopic signals that vary with the applied voltage.
Establishing reliable electric contacts between individual molecules is extremely challenging from a technical point of view. The scientists have now successfully combined this procedure with single-molecule spectroscopy, allowing them to observe even the smallest structural changes in molecules with great precision.
COMPETITION FOR SILICON
One goal of molecular electronics is to develop novel devices that can replace traditional silicon-based components using integrated and directly addressable molecules.
Thanks to its tiny dimensions, this nanosystem is suitable for applications in optoelectronics, in which light needs to be switched by an electrical potential.
Learn more: Switching with molecules
The Latest on: Molecular electronics
via Google News
The Latest on: Molecular electronics
- Samsung Develops Stretchable Electronic Skin to Detect and Display Heart Rateon August 23, 2021 at 4:30 am
Researchers at the Samsung Advanced Institute of Technology (SAIT) have designed a stretchable electronic skin, which can simultaneously measure and display a wearer’s heart rate in real-time.
- Molecular Cytogenetics Market to Grow Expansively at Overwhelming Pace, Key Players -Abbott Laboratories Thermo Fisher Scientificon August 20, 2021 at 6:20 am
New York, United States :Our research wizards at Decisive Markets Insights have effectively crafted a report on the Molecular Cytogenetics MARKET ... Semiconductors and Electronics, Healthcare, ...
- Molecular Scissoring Technology Market Size, Share, Analysis, COVIDE-19 Impact, Global Opportunity Analysis and Industry Forecast, 2021–2030on August 20, 2021 at 6:19 am
The study on the global Molecular Scissoring Technology Market encompasses ... Energy & Power, Semiconductor & Electronics, Automotive & Transportation, ICT & Media, Aerospace & Defense, and BFSI. We ...
- Crain's Health Pulse is your source for actionable, exclusive and inside news on the health care industry.on August 20, 2021 at 3:15 am
As companies across industries struggle to craft vaccine mandates, all eyes are on health care organizations, which are among the best-equipped to manage religious exemption requests having long ...
- NU launching accelerator for faculty-led startupson August 19, 2021 at 9:31 am
The university has $75 million to renovate an Evanston facility will provide lab space close to campus for researchers.
- Seeing Is Believing: Scientists Visualize Record Exciton Diffusion Lengthon August 18, 2021 at 4:47 pm
A team of Molecular Foundry researchers directly visualized and measured excitons hopping across very long distances.
- Weakly-bonded salt is a key ingredient for high-purity [email protected] film
- Researchers discover new strategy for developing human-integrated electronicson August 12, 2021 at 8:29 am
Researchers at the (PME) have developed a new strategy to overcome that limitation. Called “click-to-polymer” or CLIP, this approach uses a chemical reaction to attach new functional units onto ...
- Invisible barrier breakthrough a boon for electronics, artwork and moreon August 10, 2021 at 5:13 am
Curtin University researchers have found applying a thin invisible layer of graphene oxide to silicon forms an impermeable barrier, which could be used to protect artwork, prevent corrosion of metals, ...
via Bing News