Nanoionic Devices Group

Development of Nanoionic Devices Enabling Diverse New Functions

Importance of next-generation nanodevices

Many electronic devices, the majority of which are semiconductor-based, are used in familiar information and communications equipment.  Although semiconductor devices continue to achieve astonishing progress, supported by technical developments in miniaturization and integration, there are fears that this progress may slow in the near future.  To ensure sustained progress toward an advanced, next-generation information society, we must actively create devices which operate on principles different from those of conventional semiconductor devices, and thereby realize new functions and higher performance.  At MANA, we are focused on the development of nanoionic devices for these new devices. 

Nanoarchitectonics utilizing ion transport and molecular displacement

Fig. 1 Nanoionic Device Research Flow

One distinctive feature of nanoionic devices, which differentiates them from conventional semiconductor devices, is that they control/utilize the transport of ions, which form crystal lattices, on the atomic to nano scales.  Ion transport in crystals reconstructs their crystalline structures, interfacial structures, and other parameters, enabling nano architecture, that is, "nanoarchitectonics," in materials.  The use of nanoarchitectonics gives nanoionic devices plasticity and enables functional and structural changes where necessary.  Since such plasticity is an important feature of human neurological function, nanoionics is ideally suited for use in artifical intelligence devices.

Specialized Research Field

Our group aims to create nanoionic devices, based on solid-state nanoionics and nanotechnology,  that enable a variety of new functions.  Fig. 1 above outlines our research.  By utilizing surface nanoarchitectonic local ion transport, i.e. interface nanoarchitectonics, we have developed nanoionic devices such as, to name a few, an atomic switch, a brain-type device, all solid electric double-layer transistor, a multifunctional on-demand device, and a superconducting device that can modulate the transition temperature.  These devices enable new functions and high performance that were not possible using conventional semiconductor devices.  Based on the basic research into the said new nanoionic device operating principles, we are actively pursuing research on their practical use through collaborative research with allied companies.
Furthermore, we are investigating novel methods for constructing molecular nano-systems, in which single organic molecules and single conductive polymers are connected to each other, and are also developing methods for measuring the functions of such molecular nano-systems.  From these studies, we intend to demonstrate single molecule diodes and transistors and develop single molecule circuits.  We will also investigate the effects of carrier doping on molecular nano-systems using nano-ionics, and intend to demonstrate their new functionalities.


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Nanoionic Device Group
1-1 Namiki, Tsukuba, Ibaraki, 305-0044 JAPAN
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