Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Instrument at BESSY II shows how light activates MoS2 layers to become catalysts

A new instrument at BESSY II can be used to study molybdenum-sulfide thin films that are of interest as catalysts for solar hydrogen production. A light pulse triggers a phase transition from the semiconducting to the metallic phase and thus enhances the catalytic activity.

CREDIT
Martin Künsting /HZB
A new instrument at BESSY II can be used to study molybdenum-sulfide thin films that are of interest as catalysts for solar hydrogen production. A light pulse triggers a phase transition from the semiconducting to the metallic phase and thus enhances the catalytic activity. CREDIT Martin Künsting /HZB

Abstract:
MoS2 thin films of superposed alternating layers of molybdenum and sulfur atoms form a two-dimensional semiconducting surface. However, even a surprisingly low-intensity blue light pulse is enough to alter the properties of the surface and make it metallic. This has now been demonstrated by a team at BESSY II.

Instrument at BESSY II shows how light activates MoS2 layers to become catalysts

Berlin, Germany | Posted on March 8th, 2021

The exciting thing is that the MoS2 layers in this metallic phase are also particularly active catalytically. They can then be employed, for example, as catalysts for splitting of water into hydrogen and oxygen. As inexpensive catalysts, they could facilitate the production of hydrogen - an energy carrier whose combustion produces no CO2, only water.

Physicist Dr. Nomi Sorgenfrei and her team have constructed a new instrument at BESSY II to precisely measure the changes in samples using temporally-resolved electron spectroscopy for chemical analysis (trESCA) when irradiating the samples with low-intensity, ultra-short light pulses. These light pulses are generated at BESSY II using femtosecond time-slicing (femtoslicing) and are therefore both low intensity and extremely short duration. The new instrument, named can also rapidly obtain meaningful measurements of electron energies, surface chemistry, and transient alterations using these low-intensity light pulses.

Analysis of the empirical data showed that the light pulse leads to a transient accumulation of charge at the surface of the sample, triggering the phase transition at the surface from a semiconducting to a metallic state.

"This phenomenon should also occur in other representatives of this class of materials, the p-doped semiconducting dichalcogenides, so it opens up possibilities of influencing functionality and catalytic activity in a deliberate way", Sorgenfrei explains.

####

For more information, please click here

Contacts:
Antonia Roetger


@HZBde

Copyright © Helmholtz-Zentrum Berlin für Materialien und Energie

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

Antibody binding-site conserved across COVID-19 virus variants: The structural revelation could have implications as a therapeutic target in all SARS-CoV-2 variants April 9th, 2021

Discovery could help lengthen lifespan of electronic devices: The research could lead to electronics being designed with better endurance April 9th, 2021

Graphene: Everything under control: Research team demonstrates control mechanism for quantum material April 9th, 2021

Energy transmission by gold nanoparticles coupled to DNA structures April 9th, 2021

2 Dimensional Materials

Chile coating and composite industry makes leap forward leveraging graphene nanotube solutions April 9th, 2021

3D design leads to first stable and strong self-assembling 1D nanographene wires April 6th, 2021

2D materials for conducting hole currents from grain boundaries in perovskite solar cells April 2nd, 2021

Kirigami-style fabrication may enable new 3D nanostructures April 2nd, 2021

Possible Futures

Antibody binding-site conserved across COVID-19 virus variants: The structural revelation could have implications as a therapeutic target in all SARS-CoV-2 variants April 9th, 2021

Discovery could help lengthen lifespan of electronic devices: The research could lead to electronics being designed with better endurance April 9th, 2021

Graphene: Everything under control: Research team demonstrates control mechanism for quantum material April 9th, 2021

Energy transmission by gold nanoparticles coupled to DNA structures April 9th, 2021

Chip Technology

Discovery could help lengthen lifespan of electronic devices: The research could lead to electronics being designed with better endurance April 9th, 2021

Graphene: Everything under control: Research team demonstrates control mechanism for quantum material April 9th, 2021

Energy transmission by gold nanoparticles coupled to DNA structures April 9th, 2021

Knowledge and Power: Oxford Instruments Plasma Technology and LayTec join forces to provide critical front end processing solutions for the production of compound semiconductor devices April 7th, 2021

Discoveries

Antibody binding-site conserved across COVID-19 virus variants: The structural revelation could have implications as a therapeutic target in all SARS-CoV-2 variants April 9th, 2021

Discovery could help lengthen lifespan of electronic devices: The research could lead to electronics being designed with better endurance April 9th, 2021

Graphene: Everything under control: Research team demonstrates control mechanism for quantum material April 9th, 2021

Energy transmission by gold nanoparticles coupled to DNA structures April 9th, 2021

Materials/Metamaterials

Chile coating and composite industry makes leap forward leveraging graphene nanotube solutions April 9th, 2021

Scientists observe role of cavitation in glass fracturing April 2nd, 2021

DNA--Metal double helix: Single-stranded DNA as supramolecular template for highly organized palladium nanowires March 26th, 2021

Fast-acting, color-changing molecular probe senses when a material is about to fail March 25th, 2021

Announcements

Discovery could help lengthen lifespan of electronic devices: The research could lead to electronics being designed with better endurance April 9th, 2021

Graphene: Everything under control: Research team demonstrates control mechanism for quantum material April 9th, 2021

Energy transmission by gold nanoparticles coupled to DNA structures April 9th, 2021

A new agent for the brain diseases: mRNA April 9th, 2021

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

Antibody binding-site conserved across COVID-19 virus variants: The structural revelation could have implications as a therapeutic target in all SARS-CoV-2 variants April 9th, 2021

Discovery could help lengthen lifespan of electronic devices: The research could lead to electronics being designed with better endurance April 9th, 2021

Graphene: Everything under control: Research team demonstrates control mechanism for quantum material April 9th, 2021

Energy transmission by gold nanoparticles coupled to DNA structures April 9th, 2021

Photonics/Optics/Lasers

Microscope that detects individual viruses could power rapid diagnostics March 19th, 2021

Teamwork makes light shine ever brighter: Combined energy sources return a burst of photons from plasmonic gold nanogaps March 18th, 2021

Compression or strain - the material expands always the same March 10th, 2021

CEA-Leti Envisions Widespread Use of LiDAR Systems Based on Integrated Optical Phased Arrays (OPAs): OPAs with Solid-State Beam Steering Can Reduce the Cost and Size of LiDAR Systems & Improve Performance; Results Reported at Photonics West 2021 March 9th, 2021

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