People

Professors

Matti Mäntysalo

Professor
Elektroniikka
Faculty of Information Technology and Communication Sciences
Tampere University
+358407576800
matti.mantysalo@tuni.fi

https://orcid.org/0000-0002-7780-6454

Sayani Majumdar

Associate Professor
Thin Film Electronics
Faculty of Information Technology and Communication Sciences
Tampere University
+358405946214
+358405946214
sayani.majumdar@tuni.fi

https://orcid.org/0000-0001-7779-3959

More information

About me

My core research interest is development of Neuromorphic Computing hardware for next generation of energy-efficient, intelligent and adaptive computing and sensing. More specifically, my team's research focus is Non-volatile Memories, synaptic weight elements and leaky-integrate and fire neuron components based on Back-end CMOS compatible Ferroelectric thin films and oxide or 2D semiconductor based heterostructures. My research experience and interest also includes Spintronic components like magnetic tunnel junctions and different other emerging solid state electronic devices including optoelectronic and flexible and wearable sensor components.

Responsibilities

Teaching Courses on Semiconductor Device Physics (spring 2024) and Future Computing Devices and Architecture (upcoming, Fall 2024) and Research on Beyond CMOS computing devices and systems.

Field of expertise

Micro and Nanoscale Solid-state Electronic Device design and fabrication; Characterization; Modelling; and Neuromorphic Computing.

Research topics

Neuromorphic Computing and Adaptive Sensing for Extreme Edge devices
Low-thermal budget ferroelectric memories
Atomic Layer Deposited (ALD) thin film devices

Research unit

Electrical Engineering

Research fields

Neuromorphic Computing hardware; Non-volatile memories; Sensing; Optoelectronics, Cryogenic Electronics for Quantum Computing

Research career

I did my Ph. D. from Indian Association for the Cultivation of Science in 2006 working on fundamental physics of complex oxide materials down to deep cryogenic temperatures.
As a post-doctoral fellow in Åbo Akademi University and University of Turku in Finland, I initiated and led research on hybrid spintronic components.
I was chosen a Junior Group Leader by Turku Collegium for Science and Medicine working on Spintronic Components between 2010-2013.
I worked as a visiting scientist in Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, USA in 2010 and 2011, working on magnetic tunnel junctions.
I was an Academy Research Fellow in Aalto University, Finland , with my key research focus on ferroelectric tunnel junction based memristors and their application as electronic synapses and neurons in neuromorphic computing.
As a senior scientist in VTT, my research portfolio was further diversified to include development of 2D semiconductor based memory and logic components based on ALD grown Hafnia based ferroelectric memory (FeFET, FeTFT) devices for energy-efficient hardware for neuromorphic computing.

Funding

Mission statement

Selected publications

Modelling Ferroelectric Hysteresis of HZO Capacitor with Jiles-Atherton Model for Non-Volatile Memory Applications, Ella Paasio, Mika Prunnila, Sayani Majumdar, IEEE 12th Non-Volatile Memory Systems and Applications Symposium (NVMSA), Niigata, Japan, pp.1, 2023. doi: 10.1109/NVMSA58981.2023.00019.
Back-end and Flexible Substrate Compatible Analog Ferroelectric Field Effect Transistors for Accurate Online Training in Deep Neural Network Accelerators, S Majumdar, I Zeimpekis, Advanced Intelligent Systems, 2300391 (2023).
Large-area synthesis of high electrical performance MoS2 by a commercially scalable atomic layer deposition process, N Aspiotis, K Morgan, B März, K Müller-Caspary, M Ebert, E Weatherby, S Majumdar, I Zeimpekis, npj 2D Materials and Applications 7 (1), 18 (2023).
An efficient deep neural network accelerator using controlled ferroelectric domain dynamics, S Majumdar, Neuromorphic Computing and Engineering 2 (4), 041001 (2022).
Back-End CMOS Compatible and Flexible Ferroelectric Memories for Neuromorphic Computing and Adaptive Sensing, S Majumdar, Advanced Intelligent Systems 4, 2100175 (2022).
Ultrafast Switching and Linear Conductance Modulation in Ferroelectric Tunnel Junctions via P (VDF-TrFE) Morphology Control, S Majumdar, Nanoscale 13, 11270-11278 (2021).
Tactile sensory coding and learning with bio-inspired optoelectronic spiking afferent nerves, H Tan, Q Tao, I Pande, S Majumdar, F Liu, Y Zhou, POÅ Persson, J Rosen, S van Dijken, Nature communications 11 (1), 1369 (2020).
Crossover from synaptic to neuronal functionalities through carrier concentration control in Nb-doped SrTiO3-based organic ferroelectric tunnel junctions, S Majumdar, H Tan, I Pande, S van Dijken, APL Materials 7, 091114 (2019).
Energy‐Efficient Organic Ferroelectric Tunnel Junction Memristors for Neuromorphic Computing, S Majumdar, H Tan, Q Qin, S van Dijken, Advanced Electronic Materials 5, 1800795 (2019).

Own links

Donald Lupo

External Expert
Faculty of Information Technology and Communication Sciences
Tampere University
donald.lupo@tuni.fi

Staff

Jari Keskinen

Staff Scientist
Faculty of Information Technology and Communication Sciences
Tampere University
+358503567543
jari.keskinen@tuni.fi

https://orcid.org/0000-0002-3144-972X

Amit Tewari

Postdoctoral Research Fellow
Faculty of Information Technology and Communication Sciences
Tampere University
+358504775740
amit.tewari@tuni.fi

https://orcid.org/https://orcid.org/0000-0002-0904-243X

More information

About me

About me:

- Interdisciplinary background (Physics, Materials Science, Electrical Engineering, Life Sciences)

- Lab-On-Chip microscale bioelectronics sensors using Electrochemical Transistors

- Flexible electronics and microfluidic-based wearable medical sensors.

- Micro/nano fabrications of transistors (OTFTs, OECTs, EGOFFT), and memory devices via high-k materials.

- Cleanroom lab facilities access (multilayer deposition, patterning, Photolithography, etching, etc.)

- Highly dispersive and conductive Graphene Inks

- MATLAB, TCAD (Basic), AUTOCAD, LABVIEW

- Teaching experience for 2 years as a Physics lecturer

- International research experience that includes India, Australia, South Korea, and Finland.

- Research Interest: Graphene; Transistors; Bioelectronic Sensors; Memory Devices

Research topics

Project Title:

High-resolution, Printing-Based Patterning and PHOTOnic SINTERing for High-Speed, Low-Voltage Metal-Oxide Thin Film Transistors (HI-PHOTO-SINTER)

Collaborators:

Faculty of Information Technology and Communications (Tampere University, Finland)

Department of Electrical and Computer Engineering (Ohio State University, USA)

VTT Technical Research Centre (Finland)

Chirag Mevada

Postdoctoral Research Fellow
Faculty of Information Technology and Communication Sciences
Tampere University
+358504107256
chirag.mevada@tuni.fi

https://orcid.org/0000-0001-6221-6075

More information

About me

I am working as Postdoc for SUINK Project. My current scientific interests focus on synthesizing nanocomposites and utilizing the same to fabricate printed supercapacitors using additive manufacturing methods and investigating their electrochemical behaviors for next-generation energy storage applications.

Responsibilities

Fabrication, characterization and application of printed biodegradable supercapacitors.

Field of expertise

Synthesis of sustainable nanomaterials (nanoparticles, porous materials, thin films, composites) for next-generation energy storage applications (supercapacitors and batteries).

Research topics

Nanomaterials (nanoparticles, porous materials, thin films, composites) for next-generation energy storage applications (supercapacitors and batteries) and Catalysts and reaction engineering

Research unit

Printable Electronics Research Group, Tampere University

Research fields

Development of printed biodegradable energy storage devices

Project links

Mission statement

Selected publications

C. Mevada, V.S. Parihar, A. Tewari, J. Keskinen, M. Kellomaki, M. Mantysalo. Dopamine functionalized activated carbon-based 3D-printed biodegradable electrode for supercapacitor. IEEE Journal on Flexible Electronics. (2025) 1-1
C. Mevada, J. Tissari, V.S. Parihar, A. Tewari, J. Keskinen, M. Mäntysalo, Bio-inspired 3D-Printed Supercapacitors for Sustainable Energy Storage, J Power Sources 624, (2024) 235529
C. Mevada, J. Tissari, V.S. Parihar, A. Tewari, J. Keskinen, M. Kellomäki, M. Mäntysalo, A 3D-printed fully biocompatible supercapacitor, J Mater Chem A 12, (2024) 24357-24369
C. Mevada, M. Mukhopadhyay, Electrochemical performance of aqueous asymmetric supercapacitor based on synthesized tin oxide positive and commercial titanium dioxide negative electrodes, J Energy Storage 33 (2021) 102058
C. Mevada, M. Mukhopadhyay, Limitations and recent advances in high mass loading asymmetric supercapacitors based on pseudocapacitive materials, Ind Eng Chem Res 60 (2021) 1096–1111
C. Mevada, M. Mukhopadhyay, High mass loading tin oxide-ruthenium oxide-based nanocomposite electrode for supercapacitor application, J Energy Storage 31 (2020) 101587
C. Mevada, M. Mukhopadhyay, Electrochemical performance enhancement of high mass loading H-RuO2NPs electrode and aqueous symmetrical supercapacitor in the neutral electrolyte, J Energy Storage 30 (2020) 101453
C. Mevada, M. Mukhopadhyay, Enhancement of electrochemical properties of hydrous ruthenium oxide nanoparticles coated on chemically activated carbon cloth for solid-state symmetrical supercapacitor application, Mater Chem Phys 245 (2020) 122784
C. Mevada, P.S. Chandran, M. Mukhopadhyay, Room-temperature synthesis of tin oxide nanoparticles using gallic acid monohydrate for symmetrical supercapacitor application, J Energy Storage (2020) 101197

Hamed Pourkheirollah

Postdoctoral Research Fellow
Faculty of Information Technology and Communication Sciences
Tampere University
+358504784434
hamed.pourkheirollah@tuni.fi

https://orcid.org/0000-0002-8995-0349

More information

Research fields

Printed electronics, Printed supercapacitors, Flexible energy storage systems

Funding

Latest publications

Enhancing specific capacitance and energy density in printed supercapacitors: The role of activated wood carbon and electrolyte dynamics

Pourkheirollah, H., Vitto, R. I. M., Volperts, A., Vindt, S. T., Grīnberga, L., Kučinskis, G., Keskinen, J. & Mäntysalo, M., tammik. 2025, julkaisussa: Carbon Trends. 18, 100436.

Tutkimustuotos: Artikkeli › Tieteellinen › vertaisarvioitu

Advancements in Supercapacitor Technology: Optimizing Graphene-Enhanced Carbon Materials for Printed Supercapacitor Applications

Pourkheirollah, H., 16 lokak. 2024.

Tutkimustuotos: Other conference contribution › Tieteellinen

Experiments

Bernards, J. P. C., Ketelaars, P. H. J. M., Lupo, D., van Dongen, M. H. A., Tuukkanen, S., Pourkheirollah, H., Hiltunen, A. & Bhalerao, S., 24 toukok. 2024, Organic and Printed Electronics, Fundamentals and Applications. Nisato, G., Lupo, D. & Rudolf, S. (toim.). 2nd toim. New York: Jenny Stanford Publishing, s. 677-714

Tutkimustuotos: Luku › Tieteellinen

Optimizing Graphene-Enhanced Carbon Materials for Printed Supercapacitor Applications

Pourkheirollah, H., Vitto, R., Volperts, A., Vindt, S. T., Grīnberga, L., Kučinskis, G., Keskinen, J. & Mäntysalo, M., 15 lokak. 2024.

Tutkimustuotos: Posteri › Tieteellinen

Integration of printed supercapacitor modules and irreversible electrochromic displays

Pourkheirollah, H., Howard, E., Pinheiro, C., Parola, A. J., A.T. Laja, C., Mäntysalo, M. & Lupo, D., maalisk. 2023.

Tutkimustuotos: Other conference contribution › Tieteellinen

Integration of Supercapacitors to Trigger In-Situ Electropolymerization for Irreversible Visual Indicators

Howard, E., Pourkheirollah, H., Pinheiro, C., A.T. Laja, C., Parola, A. J., Mäntysalo, M. & Lupo, D., 28 elok. 2023, 2023 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS). IEEE Xplore: IEEE, s. 1-4 4 Sivumäärä (IEEE International Conference on Flexible and Printable Sensors and Systems).

Tutkimustuotos: Konferenssiartikkeli › Tieteellinen › vertaisarvioitu

Printed Supercapacitors for Energy Storage and Functional Applications, Modeling, Analysis, and Integration

Pourkheirollah, H., 2023, Tampere: Tampere University. (Tampere University Dissertations - Tampereen yliopiston väitöskirjat; Vuosikerta 929)

Tutkimustuotos: Väitöskirja › Collection of Articles

Simplified exponential equivalent circuit models for prediction of printed supercapacitor's discharge behavior - Simulations and experiments

Pourkheirollah, H., Keskinen, J., Mäntysalo, M. & Lupo, D., 16 maalisk. 2023, julkaisussa: Journal of Power Sources. 567, 14 Sivumäärä, 232932.

Tutkimustuotos: Artikkeli › Tieteellinen › vertaisarvioitu

Statistical analysis and Monte-Carlo simulation of printed supercapacitors for energy storage systems

Pourkheirollah, H., Keskinen, J., Mäntysalo, M. & Lupo, D., 30 marrask. 2023, julkaisussa: Journal of Power Sources. 585, 10 Sivumäärä, 233626.

Tutkimustuotos: Artikkeli › Tieteellinen › vertaisarvioitu

A Modified Exponential Equivalent Parallel Resistance (EPR) Model for Predicting Self-Discharge Behavior of Printed Flexible Supercapacitors

Pourkheirollah, H., Keskinen, J., Lupo, D. & Mäntysalo, M., 2022, 2022 IEEE 9th Electronics System-Integration Technology Conference (ESTC). IEEE, s. 264-268 5 Sivumäärä

Tutkimustuotos: Konferenssiartikkeli › Tieteellinen › vertaisarvioitu

Karem Lozano Montero

University Instructor
Faculty of Information Technology and Communication Sciences
Tampere University
+358504525417
karem.lozanomontero@tuni.fi

Kapil Bhardwaj

Postdoctoral Research Fellow
Faculty of Information Technology and Communication Sciences
Tampere University
kapil.bhardwaj@tuni.fi

Remuel Vitto

Doctoral Researcher
Faculty of Information Technology and Communication Sciences
Tampere University
+358503315482
remuel.vitto@tuni.fi

Ninja Kajas

Doctoral Researcher
Faculty of Information Technology and Communication Sciences
Tampere University
+358503094204
ninja.kajas@tuni.fi

Timo Punkari

Doctoral Researcher
Faculty of Information Technology and Communication Sciences
Tampere University
timo.punkari@tuni.fi

Padma Srivari

Doctoral Researcher
Faculty of Information Technology and Communication Sciences
Tampere University
padma.srivari@tuni.fi

Kanwar Adam

Doctoral Researcher
Faculty of Information Technology and Communication Sciences
Tampere University
+358505756825
kanwar.adam@tuni.fi

Xinye Li

Doctoral Researcher
Faculty of Information Technology and Communication Sciences
Tampere University
xinye.li@tuni.fi

Aapo Kattainen

Research Assistant
Faculty of Information Technology and Communication Sciences
Tampere University
aapo.kattainen@tuni.fi

Aregaw Kujansuu

Research Assistant
Faculty of Information Technology and Communication Sciences
Tampere University
+358505629804
aregaw.kujansuu@tuni.fi

Ella Paasio

Doctoral Researcher
Faculty of Information Technology and Communication Sciences
Tampere University
ella.paasio@tuni.fi

Tiina Koskinen

Laboratory Coordinator
Faculty of Information Technology and Communication Sciences
Tampere University
+358504128420
tiina.h.koskinen@tuni.fi