Welcome
Join us in Edinburgh, or online, in June 2023 for this latest addition to our Faraday Discussion series. For over 100 years and 300 meetings, Faraday Discussions have been the forefront of physical chemistry, and many of these Discussions have become landmark meetings in their field. The unique format of the Faraday Discussions allows for in-depth discussions and opportunities to establish new collaborations.Studying interaction of solvated ions with interfaces and their transport inside ionic devices has been a recurrently hot topic for research at the interface of physics, chemistry, and processing technologies. Iontronics, in a general use of this term, concern systems in which dissolved ions such as Na+, Cl-, and Ca2+ get transported. The driving force in iontronics is not necessarily electric or diffusive, but sometimes also convective due to fluid flows. The coupling between charge and fluid transport has found a wide range of applications, from signal transduction to energy generation or storage. The breadth and diversity of iontronic concepts, however, has been studied in parallel scientific tracks. To create opportunities for cross-fertilization between these tracks, this Faraday Discussion will be an opportunity to present the most recent experimental, theoretical, and numerical methods in the field, to review some of the existing challenges, both in fundamental research (e.g. understanding nanoscale ion transport) and in industrial applications (e.g. membrane technology, energy storage, imaging at the nanoscale), and to strengthen synergetic interactions between researchers addressing the microscopic and device-level mechanisms involved in these very pressing problems.
On behalf of the organising committee, we look forward to welcoming you to Edinburgh, or if you are joining us virtually, online.
Serge Lemay and Sanli Faez
Chairs
Format of the Discussion
Faraday Discussions remain amongst the only conferences to distribute the speakers’ research papers in advance, allowing the majority of each meeting to be devoted to discussion in which all delegates can participate. Following each meeting a written record of the discussion is published alongside the papers in the Faraday Discussions journal. Find out more about the Faraday Discussions in the video available.Themes
The session topics for this Discussion emphasize the key building blocks of iontronic systems and devices. For each block, we have chosen speakers from at least two complementary sub-disciplines so as to create synergy in the discussions and create fertile conditions for identifying parallels and persisting challenges.The Faraday Discussion will be organised into the following themes:
Iontronic coupling
The complexity of iontronics stems in large part from the various couplings inherent to these systems, further compounded by the often subtle roles of geometry and surface chemistry. This leads to surprising effects such as concentration polarization, flow-dependent charge regulation and enormous areal power densities in nm-thick membranes. This session will explore the most recent theoretical and experimental insights on ion transport through nanometric-to-micrometric channels and pores, from a microscopic perspective, at a fundamental level and with an eye for applications.
Iontronic dynamics
Iontronic processes involve several time scales. While most description and electrochemical methods are geared towards (quasi-)equilibrium conditions, transient responses have attracted more attention in recent years. Key challenges which will be discussed in this session include: (i) understanding the coupling between field effects on ions and solvent, ion-ion interactions and surface-ion interactions and their respective time scales; (ii) understanding ion-specific effects, related to differences in mass, valence, and hydration, on the dynamics; (iii) addressing the non-linear regimes, e.g. strong electric fields, where the interaction energy of an ion with the electric field is much greater than its thermal energy.
Iontronics under confinement
The study of ion flows and electrochemical processes confined to nanoscale dimensions has three main motivations: (i) the nanometer scale is the natural length scale for ions, and confinement at this level provides a new window into the elementary processes of screening, transport and charge transfer; (ii) many heterogeneous systems of technological interest, in particular in the energy sector (supercapacitors, batteries, catalysts), exploit confinement to improve the interfacial-area-to-volume ratio, yet the implications remain poorly understood; and (iii) the interest in miniaturized bioanalytical systems based on micro- and nanofluidic devices continues to mount. This session will address recent advances in experimental methods ranging from scanning probes to microfabricated structures.
Iontronic microscopy
Many iontronics processes in liquid environments are dictated by the interaction of ions with charged surfaces. The surface charge, however, is often highly heterogeneously distributed. Providing the required range of temporal and spatial resolution for sensing the surface charge heterogeneities is challenging and often hard to achieve with sufficient charge sensitivity. Recently, some direct imaging methods have been demonstrated that are sensitive to the local electric field and/or the ion concentration in the electric double layer. In this session, we aim are presenting these novel methods to the community and investigating their opportunities and limitations for investigation of iontronic processes.
Useful links
Downloads
- Draft programme
- Preprints Session 1 - Iontronic coupling
- Preprints Session 1 cont. - Iontronic coupling
- Preprints Session 2 - Iontronic dynamics
- Preprints Session 2 cont. - Iontronic dynamics
- Preprints Session 3 - Iontronic microscopy
- Preprints Session 3 cont. - Iontronic microscopy
- Preprints Session 4 - Iontronics under confinement
- Preprints Session 4 cont - Iontronics under confinement