Graphene and related materials hold great potential for technological applications such as electronics, sensors, and energy storage devices, among others. Thanks to their high surface sensitivity, these materials are an ideal platform to study the interplay between molecular assemblies at the nanoscale and macroscopic electrical phenomena.
Researchers within the Graphene Flagship designed a molecule that can reversibly undergo chemical transformations when illuminated with ultraviolet and visible light. This molecule –a photoswitchable spiropyran– can be then anchored to the surface of materials such as graphene or molybdenum disulfide, thus generating an atomically precise hybrid macroscopic superlattice. When illuminated, the whole supramolecular structure experiences a collective structural rearrangement, which could be directly visualized with a sub-nanometer resolution by scanning tunneling microscopy.
More importantly, this light-induced reorganization at the molecular level induces large changes in the macroscopic electrical properties of the hybrid devices. The molecules, together with the layers of graphene and related materials, can convert single-molecule events into a spatially homogeneous switching action that generates a macroscopic electrical response. This novel and versatile approach takes supramolecular electronics to the next level.
‘Thanks to this new approach, we can exploit the capacity of collective switching events occurring in superlattices of photochromic molecules assembled onto graphene and related materials to induce large scale and reversible modulation in the electrical properties of high-performance opto-electronic devices,’ explains Paolo Samorì, lead author of the paper. ‘This technology could find applications in the next generation of smart and portable electronics, with programmable properties,’ he adds.
Samorì also explains how this idea of tailoring molecular superlattices could generate a wide variety of new materials with tunable and responsive properties. ‘Dial your functions! You only need to carefully choose the right molecules, the thus-formed superlattice will allow to maximize the change in properties as a response to external inputs,’ he says.
Vittorio Pellegrini, researcher at IIT and Division Leader for Energy, Composites, and Production at the Graphene Flagship, highlights how the research is ‘unique in the way it combines graphene and other related materials with light-responsive chemical molecules. These macroscopic arrangements are promising platforms for optoelectronics.’ Pellegrini points out the outstanding potential of these new findings: ‘the molecular ultra-thin coating can be tailored just by synthesizing different molecules.’ Moreover, ‘this discovery will lead us to the development of devices, as the technique developed by Samorì and his team can be scaled up in reproducible manner,’ he added. Samorì agrees: ‘The limit in the scalability is the accessibility to ultra-flat and atomically precise graphene and related materials.’
These advances, made possible by the collaborative environment of the Graphene Flagship, could lead to promising applications in sensors, optoelectronics, and flexible devices. Researchers now dream of high-performance multifunctional hybrid devices under control of nature’s most abundant and powerful source of energy – light.
The Latest on: Supramolecular electronics
via Google News
The Latest on: Supramolecular electronics
- Stable supramolecular structure system to identify activity origin of carbon dioxide electroreductionon September 28, 2020 at 10:02 am
The catalytic activity of pyridine N for CO 2 electroreduction was first determined structurally by crystal supramolecular coordination compound model system. In this case, crystal ...
- Inorganic Nanoparticles for Predictive Oncology of Breast Canceron September 11, 2020 at 5:00 pm
Key applications are in coatings, pigments, electronics and photonics and ... heterogeneous networks in which molecules and supramolecular structures serve as distinct devices.
- Professor Goran Ungaron February 11, 2020 at 4:31 pm
Two main research areas: The first is the study of structure and phase behaviour of liquid crystalline (l.c.) and supramolecular polymeric and low molecular systems. Molecular organisation is ...
- Laboratory Headson October 17, 2019 at 8:21 pm
Abe, Eisuke RIKEN Center for Emergent Matter Science (CEMS) Superconducting Quantum Electronics Joint Research Unit Abe, Hideki RIKEN Center for Sustainable Resource Science (CSRS) Bioplastic Research ...
- Building bridgeson January 23, 2019 at 7:00 am
Supramolecular gels, which rely on non-covalent interactions, are typically fragile. Now, hydrogels that possess remarkable mechanical strength combined with the ability to rapidly self-heal have ...
- Nanotechnology Research Laboratorieson September 10, 2017 at 2:20 pm
The graduate program in Micro and Nanotechnology is a joint interdisciplinary program of the following Departments: Biological Sciences, Chemistry, Physics, Chemical Engineering, Electrical and ...
- Nanotechnology Degree Programs in Spainon September 10, 2017 at 2:20 pm
It influences, therefore, scientific areas of present-day interest like Molecular Electronics , Molecular Magnetism , the Supramolecular Chemistry , Physics at Superficies, or the Molecular Materials ...
- Anthony Guiseppi-Elieon July 6, 2016 at 4:12 am
Bioelectronics and Organic Electronics: i) The synthesis and characterization of chemically and biologically responsive materials such as CNT-Enzyme supramolecular conjugates, CNT-conductive ...
- Electronics Science and Technology Divisionon October 19, 2015 at 12:11 am
Fabricates millimeter-wave amplifiers based on vacuum electronics, including traveling wave tubes ... molecular films, and supramolecular systems; characterizing the low-frequency (terahertz) ...
via Bing News