Molybdenum

Researchers integrate large-area graphene-perovskite solar panels into stand-alone solar farm

An international research group, including teams from CHOSE at the University of Rome Tor Vergata, Hellenic Mediterranean University in Greece and others, has developed a large-area perovskite solar panel with graphene-doped electron transporting layers (ETLs) and functionalized molybdenum disulfide (fMoS2) buffer layers inserted between the perovskite layer and the hole transporting layer (HTL).

Nine GRAPE panels integrated in a stand-alone solar farm-powered infrastructure installed in Crete

The team reported that with increasing temperatures, the module exhibited a smaller drop in open-circuit voltage than commercially available crystalline silicon panels.

Read the full story Posted: Jun 24,2022

Researchers create miniscule graphene-MoS2 transistors

Researchers from China's Tsinghua University and East China Normal University have created a transistor with the smallest gate length ever reported. This milestone was made possible by using graphene and molybdenum disulfide and stacking them into a staircase-like structure with two steps.

Vertical MoS2 transistors with sub-1-nm gate lengths imageThe structure of the side-wall transistor: Silicon dioxide base (dark blue), aluminum covered in aluminum oxide (brown ), the thin, light blue strip is graphene, the yellow and black strip is molybdenum disulfide, and underneath it, the hafnium dioxide.

On the higher step, there is the source, and on top of the lower step, there is the drain. Both are made of a titanium palladium alloy separated by the surface of the stairs, which is made of a single sheet of a molybdenum disulfide (MoS2), itself resting on a layer of hafnium dioxide that acts as an electrical insulator.

Read the full story Posted: Mar 15,2022

Researchers experiment with LIG to create improved wearable health devices

A Penn State-led international research team (led by Professor Huanyu Larry Cheng at Penn State) recently published two studies that could boost research and development of future motion detection, tactile sensing and health monitoring devices.

Graphene made with lasers for wearable health devices image

There are various substances that can be converted into carbon to create graphene through laser radiation, in a process called laser-induced graphene (LIG). The resulting product can have specific properties determined by the original material. The team set out to test this process and has reached interesting conclusions.

Read the full story Posted: Sep 04,2021

Graphene ‘nano-origami’ could enable tiny microchips

Scientists at the University of Sussex have developed a technique for making tiny microchips from graphene and other 2D materials, using a form of ‘nano-origami’.

By creating distortions in the structure of the graphene, the researchers were able to make the nanomaterial behave like a transistor. We’re mechanically creating kinks in a layer of graphene, says Professor Alan Dalton of the School of Mathematical and Physics Sciences at the University of Sussex. It’s a bit like nano-origami. Using these nanomaterials will make our computer chips smaller and faster. It is absolutely critical that this happens as computer manufacturers are now at the limit of what they can do with traditional semiconducting technology. Ultimately, this will make our computers and phones thousands of times faster in the future.

Read the full story Posted: Feb 16,2021

New technique may enable large-area integration of 2D materials

Researchers affiliated with the Graphene Flagship from RWTH Aachen University, Universität der Bundeswehr München and AMO in Germany, KTH Royal Institute of Technology in Sweden and with Protemics have reported a new method to integrate graphene and 2D materials into semiconductor manufacturing lines, a milestone for the recently launched 2D-EPL project.

Schematic illustration of the methodology for wafer-level transfer of two-dimensional materials imageImage from Nature Communications

Two-dimensional (2D) materials have a huge potential for providing devices with much smaller size and extended functionalities with respect to what can be achieved with today's silicon technologies. But to exploit this potential, it is vital to be able to integrate 2D materials into semiconductor manufacturing lines - a notoriously difficult step. This new technique could be a step in the right direction as far as solving this problem is concerned.

Read the full story Posted: Feb 15,2021

Stretchable and ultrasensitive NO2 sensors based on rGO and MOS2 nanocomposites

Researchers at Penn State, Northeastern University and five universities in China have developed and tested a stretchable, wearable gas sensor for environmental sensing.

Stretchable, ultrasensitive, and low-temperature NO2 sensors based on MoS2@rGO nanocomposites image

The sensor combines a newly developed laser-induced graphene foam material with a unique form of molybdenum disulfide and reduced-graphene oxide nanocomposites. The researchers were interested in seeing how different morphologies of the gas-sensitive nanocomposites affect the sensitivity of the material to detecting nitrogen dioxide molecules at very low concentration. To change the morphology, they packed a container with very finely ground salt crystals.

Read the full story Posted: Sep 02,2020

Graphene and MoS2 make for a highly light-absorbent and tunable material

Physicists at the University of Basel have created a novel structure with the ability to absorb almost all light of a selected wavelength, by layering different 2D materials: graphene and molybdenum disulfide.

A highly light-absorbent and tunable material made of graphene and MoS2 imageSchematic illustration of the electron-hole pairs (electron: pink, hole: blue), which are formed by absorption of light in the two-layer molybdenum disulfide layer. Credit: Nadine Leisgang and Lorenzo Ceccarelli, Department of Physics, University of Basel

The new structure's particular properties reportedly make it a candidate for applications in optical components or as a source of individual photons, which play a key role in quantum research.

Read the full story Posted: Aug 12,2020

New technique allows for processing surfaces on an atomic scale

Researchers at TU Wien have designed a nano-structuring method, with which certain layers of a material can be perforated with extreme precision while others are left completely untouched, even though the projectile penetrates all layers.

Atomic-Scale Carving of Nanopores into 2D materials imageThe projectile penetrates all layers, but only in the top layer, a big hole is created. The graphene below remains intact. Credit: TU Wien

This is made possible with the help of highly charged ions - they can be used to selectively process the surfaces of novel 2D material systems, for example to anchor certain metals on them, which can then serve as catalysts.

Read the full story Posted: Aug 04,2020

An interview with Patrick Frantz, planarTECH's co-founder and CEO

UK-based planarTECH has launched an equity crowdfunding campaign on Seedrs, as part of Graphene-Info's Graphene Crowdfunding Arena. planarTECH aims to expand its current business and also initiate new graphene endeavors. Investors are now able to participate in this financing round.

Here's our interview with planarTECH's co-founder and CEO, J. Patrick Frantz - who explains the company's technology, business and future plans.

Read the full story Posted: Mar 02,2020

Graphene production systems maker planarTECH launches an equity crowdfunding campaign to support its future growth potential

UK-based planarTECH is launching an equity crowdfunding campaign at on Seedrs, as part of Graphene-Info's Graphene Crowdfunding Arena. planarTECH aims to expand its current business and also initiate new graphene endeavors.

planarTECH planarGROW 8S photo

planarTECH, founded in 2014, supplies CVD equipment for the production of high quality graphene sheets, as well as other 2D materials. The company was focused on research institutes, and already sold over 65 systems with a customer list that includes Manchester University, the University of Cambridge, Stanford University and the National University of Singapore.

Read the full story Posted: Feb 06,2020