Close Menu
  • News
  • Medical
  • Technology
  • Nanomaterials
  • Research
  • Blog
    • Nasiol.com
  • Contact
    • Tech7685@gmail.com
What's Hot

A new molecular model of bilayer graphene with higher semiconducting properties

May 31, 2025

5 Nanomaterial Innovations That Didn’t Deliver (Yet)

May 30, 2025

Scientists identify new 2D copper boride material with unique atomic structure

May 30, 2025
Facebook X (Twitter) Instagram
Nanotech – Nanomaterials | Medical | Research | News Stories Updated Daily Nanotech – Nanomaterials | Medical | Research | News Stories Updated Daily
  • News
  • Medical
  • Technology
  • Nanomaterials
  • Research
  • Blog
    • Nasiol.com
  • Contact
    • Tech7685@gmail.com
Facebook X (Twitter) Instagram
Nanotech – Nanomaterials | Medical | Research | News Stories Updated Daily Nanotech – Nanomaterials | Medical | Research | News Stories Updated Daily
Home»News»Neutralizing electronic inhomogeneity in cleaved bulk MoS₂
News

Neutralizing electronic inhomogeneity in cleaved bulk MoS₂

November 11, 2023No Comments2 Mins Read
Facebook Twitter Pinterest Telegram LinkedIn Tumblr WhatsApp Email
Neutralizing electronic inhomogeneity in cleaved bulk MoS₂
Share
Facebook Twitter LinkedIn Pinterest Telegram Email
The illustration shows the MoS2 lattice structure (green: Mo, yellow: S). The material after cleaving is shown in the forefront, the surface is jagged, and the measured surface electronic structure is inhomogeneous (colored map). In the back is the cleaved material after exposure to atomic hydrogen (represented by the white balls). The measured surface electronic structure, shown in the map, is more homogenous. Credit: Martin Künsting / HZB

Molybdenum disulfide (MoS2) is a highly versatile material that can function, for example, as a gas sensor or as a photocatalyst in green hydrogen production. Although the understanding of a material usually starts from investigating its bulk crystalline form, for MoS2 much more studies have been devoted to mono and few layer nanosheets.

The few studies conducted thus far show diverse and irreproducible results for the electronic properties of cleaved bulk MoS2 surfaces, highlighting the need for a more systematic study.

Dr. Erika Giangrisostomi and her team at HZB carried out such a systematic study at the LowDosePES end-station of the BESSY II light source. They utilized X-ray photoelectron spectroscopy technique to map the core-level electron energies across extensive surface areas of MoS2 samples. Using this method, they were able to monitor the changes in the surface electronic properties after in-situ ultra-high-vacuum cleaving, annealing and exposure to atomic and molecular hydrogen.

The results from this study point to two main findings. Firstly, the study unambiguously reveals sizeable variations and instabilities in electron energies for the freshly cleaved surfaces, demonstrating how easy it is to come to diverse and irreproducible outcomes. Secondly, the study shows that room temperature atomic hydrogen treatment is remarkably effective in neutralizing the surface electronic inhomogeneity and instability.

This is rationalized by the ability of hydrogen atoms to either accept or give away an electron, and calls for further characterizations of the functional properties of the hydrogenated material. “We hypothesize that atomic hydrogen helps rearranging sulfur vacancies and excess of sulfur atoms yielding a more ordered structure,” Erika Giangrisostomi says.

See also  Researchers develop proton barrier films using pore-free graphene oxide

This study marks a fundamental step in the investigation of MoS2. Due to the extensive use of MoS2 in all kinds of applications, the findings of this research have the potential to reach a wide audience in the fields of electronics, photonics, sensors and catalysis.

The study is published in the journal Advanced Materials Interfaces.

Provided by
Helmholtz Association of German Research Centres



Source link

bulk cleaved electronic inhomogeneity MoS₂ neutralizing
Share. Facebook Twitter Pinterest LinkedIn Tumblr Email

Related Posts

A new molecular model of bilayer graphene with higher semiconducting properties

May 31, 2025

5 Nanomaterial Innovations That Didn’t Deliver (Yet)

May 30, 2025

Scientists identify new 2D copper boride material with unique atomic structure

May 30, 2025

Nanoscale biosensor lets scientists monitor molecules in real time

May 30, 2025

How should we govern nanotechnology?

May 29, 2025

The Future of Needle-Free Immunization

May 28, 2025

Comments are closed.

Top Articles
News

Hybrid nanomaterials promise a sustainability boost across multiple industries

News

What is a Graphene Field Effect Transistor?

News

The Difference Between Soft Lithography and 3D Printing

Editors Picks

A new molecular model of bilayer graphene with higher semiconducting properties

May 31, 2025

5 Nanomaterial Innovations That Didn’t Deliver (Yet)

May 30, 2025

Scientists identify new 2D copper boride material with unique atomic structure

May 30, 2025

New contact lenses allow wearers to see in the near-infrared

May 30, 2025
About Us
About Us

Your go-to source for the latest nanotechnology breakthroughs. Explore innovations, applications, and implications shaping the future at the molecular level. Stay informed, embrace the nano-revolution.

We're accepting new partnerships right now.

Facebook X (Twitter) Instagram Pinterest
Our Picks

Bacteria in polymers create cable-like structures that grow into living gels

January 28, 2025

Novel quantum dot hydrogel shows improved photothermal conversion efficiency

September 18, 2024

High-performance 3D-printed graphene composites developed for efficient ice control

May 2, 2025

Subscribe to Updates

Get the latest creative Nano Tech news from Elnano.com

© 2025 Elnano.com - All rights reserved.
  • Contact
  • Privacy Policy
  • Terms & Conditions

Type above and press Enter to search. Press Esc to cancel.

Cleantalk Pixel