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Pioneering innovative energy and environmental
devices with Atomic-scale Nanotechnology

*This Lab. is not accepting new student.

MIZUTA Lab.
Senior Lecturer: MURUGANATHAN, Manoharan

E-mail:
[Research areas]
Atomic scale devices, Quantum and Hybrid Electronics, Atomistic simulations
[Keywords]
Graphene, Nano-Electro-Mechanical Systems (NEMS), Single Molecule sensor, 2D van der Waals(vdW) Heterostructure

Skills and background we are looking for in prospective students

In Mizuta-Manoharan laboratory, we are conducting interdisciplinary research by integrating physics, electrical and electronics engineering, mechanical engineering, chemistry and Biology research fields. We welcome any student with fundamental knowledge in these fields and interested in innovative energy and environmental device research.

What you can expect to learn in this laboratory

Mizuta-Manoharan laboratory utilizes atomic layer materials like graphene, h-BN, MoS2, etc and ultrafine fabrication technology with 1 nm precision to develop ultra-sensitive environmental sensor devices, low power consumption NEMS switches, quantum information processing devices, and so on. Based on these researches, students will obtain first-hand experience in (1) Electron Beam lithography and cutting edge Helium ion beam patterning technologies and nano-device fabrication processes, (2) Environmentally controlled 5 K to 500 K temperature range DC and RF probe stations, dilution refrigerator, Electrical characteristic measurements, (3) Design and analysis techniques ranging from first principles calculation to device and circuit simulations.

【Job category of graduates】 Information and Communications Technology Companies and Manufacturing Industries.

Research outline

In this laboratory, we carry out research using graphene and other 2D atomic layer materials and ultra-fine fabrication technology with atomic scale precision for Extremely sensitive environmental sensor, Ultra-low power consumption NEMS switch, Quantum information processing device, Thermal phonon engineering devices, etc. We are aiming to contribute to energy and environmental problems.

Specifically, we focus on following four research topics:

1.Graphene Nanoelectromechanical (GNEM) sensors:


Fig. 1 (a) Schematic diagram and (b) AFM image of the suspended graphene with bottom electrode

Fig.2 Monolayer GNEMS Switch

Fig.3 (a) CO2 molecule adsorbed on to graphene beam (b) Charge distribution across the molecule (c) Molecular dynamics simulation

By using highly sensitive GNEM devices, we are developing Extremely sensitive environmental sensors enabling detection of even single molecule. Using GNEM device structure, we are developing energy harvesting architecture for environmental sensor self-powering capability.

2.Graphene Nano Electro Mechanical Switches

We are developing novel NEMS devices that are impossible with conventional semiconductor materials. Graphene and other 2D materials NEMS switches research work is carried out for ultra-low power integrated system operating at low voltage.

3.Quantum information device and Graphene tunnel field effect transistor

We study the quantum information devices using graphene and other 2D materials to realize long spin decoherence time. Tunnel field eff ect transistors (TFET) are electrical switching devices based on novel physics, which can overcome the theoretical subthreshold slope limitation of conventional silicon MOSFETs. As silicon TFETs suff ers from low ON current, we study the operation mechanism and performance limit of graphene TFETs both experimentally and multi-scale simulations (first-principles and device level).

4.Atomistic and Multiscale Phonon simulations

We aim to develop a graphene phononic device that can control thermal phonons (phonon in the THz regime) by forming periodic nanopore structure in graphene. We also study single dopants in Silicon and vacancy-centers in diamond by first-principles simulations.

 

Key publications

  1. N. H. Van, M. Muruganathan, J. Kulothungan, and H. Mizuta, Fabrication of a three-terminal graphene nanoelectromechanical switch using two-dimensional materials. Nanoscale (2018).
  2. J. Sun, M. Muruganathan, and H. Mizuta, ʻRoom temperature detection of individual molecular physisorption using suspended bilayer graphene’, Science Advances 2, 4, e1501518 (2016)
  3. M. Muruganathan, J. Sun, T. Imanura and H. Mizuta, ʻElectrically-tunable van der Waals interaction in graphene-molecule complex’, Nano Letters 15,8176-8180 (2015)

Teaching policy

We explore a variety of emerging nanotechnologies for 'More-than-Moore' and 'Beyond CMOS' era. We warmly welcome young scientists seeking an active international research environment and innovative atomistic scale devices research.

[Website] URL:http://www.jaist.ac.jp/ms/labs/mizuta-lab/english/index.html

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