Hybrid Material May Outperform Graphene in Several ApplicationsMarch 1, 2019 | Agência FAPESP
Estimated reading time: 2 minutes
Materials that are hybrid constructions (combining organic and inorganic precursors) and quasi-two-dimensional (with malleable and highly compactable molecular structures) are on the rise in several technological applications, such as the fabrication of ever-smaller optoelectronic devices.
Image Caption: A structure comprising a molybdenum disulfide monolayer on an azobenzene substrate could be used to build a highly compactable and malleable quasi-two-dimensional transistor powered by light (image: atomistic representations of molybdenum disulfide monolayer with an azobenzene molecule in its trans and cis isomers/ Physical Review B)
An article published in the journal Physical Review B describes a study in this field resulting from the doctoral research of Diana Meneses Gustin and Luís Cabral, both supervised by Victor Lopez Richard, a professor at the Federal University of São Carlos (UFSCar) in Brazil. Cabral was cosupervised by Juarez Lopes Ferreira da Silva, a professor at the University of São Paulo’s São Carlos Chemistry Institute (IQSC-USP). Gustin was supported by FAPESP via a doctoral scholarship and a scholarship for a research internship abroad.
“Gustin and Cabral explain theoretically the unique optical and transport properties resulting from interaction between a molybdenum disulfide monolayer (inorganic substance MoS2) and a substrate of azobenzene (organic substance C12H10N2),” Lopez Richard told Agência FAPESP.
Illumination makes the azobenzene molecule switch isomerization and transition from a stable trans spatial configuration to a metastable cis form, producing effects on the electron cloud in the molybdenum disulfide monolayer. These effects, which are reversible, had previously been investigated experimentally by Emanuela Margapoti in postdoctoral research conducted at UFSCar and supported by FAPESP.
Gustin and Cabral developed a model to emulate the process theoretically. “They performed ab initio simulations (computational simulations using only established science) and calculations based on density functional theory (a quantum mechanical method used to investigate the dynamics of many-body systems). They also modeled the transport properties of the molybdenum disulfide monolayer when disturbed by variations in the azobenzene substrate,” Richard explained.
While the published paper does not address technological applications, the deployment of the effect to build a light-activated two-dimensional transistor is on the researchers’ horizon.
“The quasi two-dimensional structure makes molybdenum disulfide as attractive as graphene in terms of space reduction and malleability, but it has virtues that potentially make it even better. It’s a semiconductor with similar electrical conductivity properties to graphene’s and it’s more versatile optically because it emits light in the wavelength range from infrared to the visible region,” Richard said.
The hybrid molybdenum-disulfide-azobenzene structure is considered a highly promising material, but a great deal of research and development will be required if it is to be effectively deployed in useful devices.
The first step for a sales team is to directly interact with the targeted customers, converting the leads (created by advertising and research done by the marketing team) into sales. Marketing is the first chapter, and sales is the rest of the story. Get to know the customer and build a relationship with the key decision-makers, be they process engineers, purchasing agents, or just about everyone in between.
Researchers from the Research Center for Materials Nanoarchitectonics (MANA) have introduced a doping method to achieve accurate and consistent conductivity for organic semiconductors.
Fujitsu and Delft University of Technology today announced the establishment of the Fujitsu Advanced Computing Lab Delft at Delft University of Technology, an industry-academia collaboration hub dedicated to the development of quantum computing technologies.
A shift of power that we saw on the worldwide stage also happened in China, the largest smartphone market globally. Apple became the leading smartphone company in China for the first time with record high market share of 17.3% in 2023.
MID4automotive: This is a publicly funded research project in the field of microelectronics/automotive, where Peters is involved alongside numerous other electrical engineering companies and institutes.