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
- Sandy on the Practicalities of Molecular Testing in Newly Diagnosed Lung Canceron August 1, 2022 at 7:00 am
Beth Sandy, MSN, CRNP, discusses some of the challenges that may be associated with molecular testing, and how oncology nurses can help play a role in ensuring that the reports are received.
- Champion semiconductor could replace silicon, say researcherson August 1, 2022 at 2:00 am
Experimental evidence for exceptional thermal conductivity and hole mobility in cubic boron arsenide raises hopes for future applications ...
- Taiwan Startup Molsentech Ultra-high Sensitivity Biomedical Detection Technology Leaps Onto Global Stageon July 28, 2022 at 8:00 pm
With its impressive achievements, Molsentech (Molecular Sensoring Technology Co., Ltd.) has been selected by the TTA Global Challenge sponsored by Taiwan's Ministry of Science and Technology to ...
- Ultra-High Molecular Weight Polyethylene Market Size is projected to reach USD 5.51 billion by 2030, growing at a CAGR of 12.75%: Straits Researchon July 28, 2022 at 4:40 am
The global market for ultra-high molecular weight polyethylene was valued at USD 1.87 billion in 2021, and it is projected to increase at a CAGR of 12.75 per cent to reach USD 5.51 billion by 2030. It ...
- Cadence expands into molecular simulationon July 26, 2022 at 1:52 am
Technological advancements, coupled with the rising demand for new drugs across a range of diseases, are driving increased demand for computational drug design. The growing utilisation of ...
- Cadence Expands into Molecular Simulation with Acquisition of OpenEye Scientific, a Pioneering Leader in Computational Molecular Designon July 25, 2022 at 6:27 am
Design Systems, Inc. (Nasdaq: CDNS) announced today that it has entered into a definitive agreement to acquire privately held OpenEye Scientific Software, Inc., a leading provider of computational ...
- Quantum models reveal electronic properties of amorphous carbonon July 25, 2022 at 2:01 am
When carbon atoms stack into a perfectly repeating three-dimensional crystal, they can form precious diamonds. Arranged another way, in repetitive flat sheets, carbon makes the shiny gray graphite ...
- Researchers Publish New Observations On Graphiteon July 22, 2022 at 11:23 am
The Okazaki Institute for Molecular Science’s researchers used an electron microscope and a newly designed photoelectron spectroscopy device to analyze the surface state of graphite in an effort to ...
- Global Molecular Imaging Equipment Market Size, In-depth Analysis Report and Forecast to 2028on July 11, 2022 at 8:20 am
Molecular Imaging (MI ... Neusoft Corporation, MiE Medical Imaging Electronics GmbH, Mediso Ltd., Koninklijke Philips N.V., GE Healthcare, Digirad Corporation, DDD-Diagnostic A/S, CMR Naviscan ...
via Bing News