Alpuim Group
The Alpuim Group focuses on platforms and device technologies based on two-dimensional (2D) materials.
Graphene liquid-gate field-effect transistor (FET) platforms and functionalised 2D channels are developed for biomarker detection, immuno-assays, and DNA sensing. Specificity is achieved via controlled functionalisation of the graphene channel, enabling high sensitivity and wide dynamic range. Multiplexed graphene transistor platforms and dedicated high-speed electronics are developed for brain activity recording of key neurotransmitters (dopamine, gamma-aminobutyric acid (GABA), glutamate) with physiological spatiotemporal resolution. CMOS heterogeneous integration is under development in collaboration with Fraunhofer-IZM (Berlin) within the Chips JU program.
Chemical vapor deposition (CVD) growth, transfer methodologies, and cleanroom-based device fabrication of 2D materials are advanced, supported by elemental, structural, and spectroscopic characterisation. In parallel, scalable liquid-phase exfoliation (LPE) approaches are developed to produce 2D materials-based inks, pastes, and slurries compatible with inkjet, screen printing, and spray coating for low-cost and large-area device fabrication. Applications under development include electromagnetic shielding coatings, membranes for efficient liquid filtration, and energy harvesting systems based on transition-metal dichalcogenides (TMDs).
Research activities also include memristive devices for memory and neuromorphic applications based on layered semiconductors and van der Waals heterostructures. Additional activities include defect-engineered quantum emitters in hexagonal boron nitride (h-BN), and exploratory directions in twistronics and topological insulators.
Research Lines:
- 2D materials-based chemical sensing (Jerome Borme)
- Advanced processing of 2D materials (Andrea Capasso)
- Graphene-based materials for flexible electronics, energy, and environmental applications (Andrea Capasso)
Projects
Publications
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Fully screen-printed thermoelectric generator from PbSe quantum dots
MATERIALS TODAY ENERGY, 2025Temperature-and Bias-Dependent Capture-Emission Time Maps in Electrolyte-Gated Graphene Field-Effect Transistors
IEEE TRANSACTIONS ON ELECTRON DEVICES, 2025Small form factor implantable neural probe with efficient flip chip μLED for in vivo optogenetics
BIOMEDICAL MICRODEVICES, 2025Wafer-Level Fabrication of Radiofrequency Devices Featuring 2D Materials Integration
NANOMATERIALS, 2025A gas ionization sensor with a novel pyroelectric lithium niobate crystal as a voltage source
SENSORS AND ACTUATORS A-PHYSICAL, 2025Can structure influence hydrovoltaic energy generation? Insights from the metallic 1T′ and semiconducting 2H phases of MoS2
NANOSCALE, 2025CMOS Platform for Neurochemical Detection Using 32 Graphene FETs Array at 16 kS/s per Channel
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2025Electrically Conductive Nanocarbon/Elastomer Composite Inks for Flexible and Wearable Strain Sensing
SMALL, 2025Graphene-Based Glucose Sensors with an Attomolar Limit of Detection
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2025Interaction-driven giant electrostatic modulation of ion permeation in atomically small capillaries
NATURE COMMUNICATIONS, 2025Interface Engineering of Chemical Vapor-Deposited 2D MoSe2
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS, 2025Laser-Induced Graphene Interfaces with Controlled Electrical Conductivity, Topography and Wettability for Biomedical Applications
ACS APPLIED NANO MATERIALS, 2025Substrate-Mediated Fluorination of Graphene Directs Biointerface Chemistry and Cellular Interactions
ACS APPLIED MATERIALS & INTERFACES, 2025Broadband high-performance terahertz polarizers by nanoimprint lithography for advanced applications
OPTICS EXPRESS, 2025Precision-Engineered Plasmonic Nanostar Arrays for High-Performance SERS Sensing
ADVANCED OPTICAL MATERIALS, 2025Analytical modeling and experimental characterization of drift in electrolyte-gated graphene field-effect transistors
NPJ 2D MATERIALS AND APPLICATIONS, 2025Graphene transistors' modeling, characterization, and a 180 nm CMOS front-end design
2025 IEEE 16TH LATIN AMERICA SYMPOSIUM ON CIRCUITS AND SYSTEMS, LASCAS, 2025Hybrid DNA Origami - Graphene Platform for Electrically-Gated Nanoscale Motion
ADVANCED MATERIALS INTERFACES, 2025 -
Towards safer and sustainable MXene production
TOXICOLOGY LETTERS, 2024Hybrid graphene nanoflakes for electrochemical sensing with multianalyte detection capability
DIAMOND AND RELATED MATERIALS, 2024PbSe Quantum Dot Superlattice Thin Films for Thermoelectric Applications
ADVANCED FUNCTIONAL MATERIALS, 2024Eco-Friendly Production of 2D Ti3C2Tx MXene and Cytotoxicity Mitigation Toward Biomedical Applications
ADVANCED MATERIALS INTERFACES, 2024The potential of graphene coatings as neural interfaces
NANOSCALE HORIZONS, 2024Geometry-Optimized Flexible Ferroelectret Fabricated by Laser Patterning of an Adhesive Spacer
IEEE SENSORS JOURNAL, 2024Resistive switching and Schottky barrier modulation at CoPt/ ferroelectric‑like MgZnO interface for non‑volatile memories
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2024The Comprehensive Roadmap Toward Malaria Elimination Using Graphene and its Promising 2D Analogs
ADVANCED NANOBIOMED RESEARCH, 2024Sustainable graphene production for solution-processed microsupercapacitors and multipurpose flexible electronics
NANO ENERGY, 2024 -
Graphene Nanogap Interdigitated Asymmetric Electrodes for Photodetection
CHEMOSENSORS, 2023Stable Graphene Membranes for Selective Ion Transport and Emerging Contaminants Removal in Water
ADVANCED FUNCTIONAL MATERIALS, 2023Attomolar detection of hepatitis C virus core protein powered by molecular antenna-like effect in a graphene field-effect aptasensor
BIOSENSORS & BIOELECTRONICS, 2023Bipolar Resistive Switching in 2D MoSe2 Grown by Atmospheric Pressure Chemical Vapor Deposition
ACS APPLIED MATERIALS & INTERFACES, 2023Cu(In,Ga)Se-2 based ultrathin solar cells the pathway from lab rigid to large scale flexible technology
NPJ FLEXIBLE ELECTRONICS, 2023E-MRS Fall Meeting 2022 Symposium L "Doping at the Nanoscale: New Challenges and Advanced Applications"
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, 2023Extraction of Graphene's RF Impedance through Thru-Reflect-Line Calibration
MICROMACHINES, 2023Graphene Biosensors Operated in DC Transistor and AC Electrochemical Modes for DNA sensing
2023 IEEE SENSORS, 2023Integrated Approach from Sample-to-Answer for Grapevine Varietal Identification on a Portable Graphene Sensor Chip
ACS SENSORS, 2023Light-Controlled Pyroelectric Effect: Direct Conversion of Light-Induced Heat to Physical Actuation
R. M. R. Pinto, M. Faraji and K. B. Vinayakumar, "Light-Controlled Pyroelectric Effect: Direct Conversion of Light-Induced Heat to Physical Actuation," Transducers, Kyoto, Japan, 2023, pp. 1260-1263, 2023Material jetting of carbon nano onions for printed electronics
NANOTECHNOLOGY, 2023Porous Iron-Nitrogen-Carbon Electrocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC)
CHEMELECTROCHEM, 2023Room-temperature electroluminescence and light detection from III-V unipolar microLEDs without p-type doping
OPTICA, 2023Second harmonic injection locking of coupled spin torque vortex oscillators with an individual phase access
Communications Physics, 2023Self-Powered Flexible Piezoelectret Array for Wearable Applications
2023 IEEE 36TH INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS, MEMS, 2023Solvent-free transfer of monolayer graphene with recrystallized cyclododecane
APPLIED PHYSICS LETTERS, 2023Textile-Based Stretchable Strain Sensor for Human Activity and Health Monitoring
R. M. R. Pinto, M. Faraji and K. B. Vinayakumar, "Textile-Based Stretchable Strain Sensor for Human Activity and Health Monitoring,", Transducers, Kyoto, Japan, 2023, pp. 1612-1615., 2023Solution-Processed Functionalized Graphene Film Prepared by Vacuum Filtration for Flexible NO2 Sensors
SENSORS, 2023Opto-evoked neurotransmitter detection with graphene nanobiosensors
JOURNAL OF NEUROCHEMISTRY, 2023 -
Programmable graphene-based microfluidic sensor for DNA detection
SENSORS AND ACTUATORS B-CHEMICAL, 2022Towards RF graphene devices: A review
FLATCHEM, 2022Room-temperature emitters in wafer-scale few-layer hBN by atmospheric pressure CVD
FLATCHEM, 2022Inkjet-Printing of Carbon Nano Onions for Sensor Applications in Flexible Printed Electronics
2022 IEEE INTERNATIONAL CONFERENCE ON FLEXIBLE AND PRINTABLE SENSORS AND SYSTEMS (IEEE FLEPS 2022), 2022Design and manufacture of an all-polymeric integrated multimode interferometer for visible photonics
OPTICS EXPRESS, 2022Green Solvents for the Liquid Phase Exfoliation Production of Graphene: The Promising Case of Cyrene
FRONTIERS IN CHEMISTRY, 2022Nanocrystalline graphene for ultrasensitive surface-enhanced Raman spectroscopy
APPLIED SURFACE SCIENCE, 2022Optimizing PMMA solutions to suppress contamination in the transfer of CVD graphene for batch production
BEILSTEIN JOURNAL OF NANOTECHNOLOGY, 2022Spectral-temporal luminescence properties of Colloidal CdSe/ZnS Quantum Dots in relevant polymer matrices for integration in low turn-on voltage AC-driven LEDs
OPTICS EXPRESS, 2022Strain-modulated optical response in 2D MoSe2 made by Na-assisted CVD on glass
APPLIED PHYSICS LETTERS, 2022Strain-modulated optical response in 2D MoSe2 made by Na-assisted CVD on glass
APPLIED PHYSICS LETTERS, 2022Surface Passivation of III-V GaAs Nanopillars by Low-Frequency Plasma Deposition of Silicon Nitride for Active Nanophotonic Devices
ACS APPLIED ELECTRONIC MATERIALS, 2022Ultrasensitive dopamine detection with graphene aptasensor multitransistor arrays
JOURNAL OF NANOBIOTECHNOLOGY, 2022Wet-Chemical Noncovalent Functionalization of CVD Graphene: Molecular Doping and Its Effect on Electrolyte-Gated Graphene Field-Effect Transistor Characteristics
JOURNAL OF PHYSICAL CHEMISTRY C, 2022High Seebeck Coefficient from Screen-Printed Colloidal PbSe Nanocrystals Thin Film
MATERIALS, 2022 -
Mechanically Tunable Lattice-Plasmon Resonances by Templated Self-Assembled Superlattices for Multi-Wavelength Surface-Enhanced Raman Spectroscopy
SMALL METHODS, 2021The Challenges of Developing Biosensors for Clinical Assessment: A Review
CHEMOSENSORS, 2021Discovering Light: Fun Experiments with Optics
PDF ISBN: 9781510639362 | Print ISBN: 9781510639355, 2021Interactions between Primary Neurons and Graphene Films with Different Structure and Electrical Conductivity
ADVANCED FUNCTIONAL MATERIALS, 2021Interplay of Magnetic Properties and Doping in Epitaxial Films of h-REFeO3 Multiferroic Oxides
SMALL, 2021Efficient ReSe2 Photodetectors with CVD Single-Crystal Graphene Contacts
NANOMATERIALS, 2021Efficient ReSe2 Photodetectors with CVD Single-Crystal Graphene Contacts
NANOMATERIALS, 2021Role of sublimation kinetics of ammonia borane in chemical vapor deposition of uniform, large-area hexagonal boron nitride
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 2021Highly-efficient GaAs/AlGaAs Nanopillars and NanoLEDs via SiNx Surface Passivation
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC), 2021High-Performance and Industrially Viable Nanostructured SiOx Layers for Interface Passivation in Thin Film Solar Cells
SOLAR RRL, 2021Hydrogenated Graphene Improves Neuronal Network Maturation and Excitatory Transmission
ADVANCED BIOLOGY, 2021Influence of the Electrolyte Salt Concentration on DNA Detection with Graphene Transistors
BIOSENSORS-BASEL, 2021Interactions Between 2D Materials and Living Matter: A Review on Graphene and Hexagonal Boron Nitride Coatings
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY, 2021On the Importance of Joint Mitigation Strategies for Front, Bulk, and Rear Recombination in Ultrathin Cu(In,Ga)Se-2 Solar Cells
ACS APPLIED MATERIALS & INTERFACES, 2021Room temperature two terminal tunnel magnetoresistance in a lateral graphene transistor
NANOSCALE, 2021Tuning the Electronic Properties of Graphane via Hydroxylation: An Ab Initio Study
JOURNAL OF PHYSICAL CHEMISTRY C, 2021Efficient infrared sunlight absorbers based on gold-covered, inverted silicon pyramid arrays
MATERIALS ADVANCES, 2021Environmentally Friendly Graphene Inks for Touch Screen Sensors
ADVANCED FUNCTIONAL MATERIALS, 2021Non-volatile artificial synapse based on a vortex nano-oscillator.
Scientific Reports, 2021Seedless Cu Electroplating on Co-W Thin Films in Low pH Electrolyte: Early Stages of Formation
NANOMATERIALS, 2021 -
Efficient light extraction in subwavelength GaAs/AlGaAs nanopillars for nanoscale light-emitting devices
OPTICS EXPRESS, 2020Multi-beam two-photon polymerization for fast large area 3D periodic structure fabrication for bioapplications
SCIENTIFIC REPORTS, 2020Recent Advancements on the CVD of Graphene on Copper from Ethanol Vapor
C-JOURNAL OF CARBON RESEARCH, 2020Effects of magnetic monopoles charge on the cracking reversal processes in artificial square ices
SCIENTIFIC REPORTS, 2020Non-invasive molecular assessment of human embryo development and implantation potential
BIOSENSORS & BIOELECTRONICS, 2020Over 6% Efficient Cu(ln,Ga)Se-2 Solar Cell Screen-Printed from Oxides on Fluorine-Doped Tin Oxide
ACS APPLIED ENERGY MATERIALS, 2020Raman Spectroscopy for Tumor Diagnosis in Mammary Tissue
PROCEEDINGS OF THE 8TH INTERNATIONAL CONFERENCE ON PHOTONICS, OPTICS AND LASER TECHNOLOGY (PHOTOPTICS), 2020Rational Design of Photo-Electrochemical Hybrid Devices Based on Graphene and Chlamydomonas reinhardtii Light-Harvesting Proteins
SCIENTIFIC REPORTS, 2020Clean-Room Lithographical Processes for the Fabrication of Graphene Biosensors
MATERIALS, 2020Double grain boundary configurations on graphite surfaces
CARBON, 2020Field-effect transistors made of graphene grown on recycled copper foils
MATERIALS CHEMISTRY AND PHYSICS, 20202D semiconducting materials for electronic and optoelectronic applications: potential and challenge
2D MATERIALS, 2020Highly flexible graphene nanoplatelet-polydimethylsiloxane strain sensors with proximity-sensing capability
MATERIALS RESEARCH EXPRESS, 2020 -
Negative thermoelectric power of melt mixed vapor grown carbon nanofiber polypropylene composites
CARBON, 2019Rear Optical Reflection and Passivation Using a Nanopatterned Metal/Dielectric Structure in Thin-Film Solar Cells
IEEE JOURNAL OF PHOTOVOLTAICS, 2019Graphene setting the stage: tracking DNA hybridization with nanoscale resolution
2D MATERIALS, 2019A morphological and electronic study of ultrathin rear passivated Cu(In,Ga)Se-2 solar cells
THIN SOLID FILMS, 2019Electrically Conducting and Mechanically Strong Graphene-Polylactic Acid Composites for 3D Printing
ACS APPLIED MATERIALS & INTERFACES, 2019Experimental and theoretical evidences for the ice regime in planar artificial spin ices
JOURNAL OF PHYSICS-CONDENSED MATTER, 2019Functionalization of single-layer graphene for immunoassays
APPLIED SURFACE SCIENCE, 2019Spin torque nano-oscillator driven by combined spin injection from tunneling and spin Hall current
COMMUNICATIONS PHYSICS, 2019Template-directed self-organization of colloidal PbTe nanocrystals into pillars, conformal coatings, and self-supported membranes
NANOSCALE ADVANCES, 2019Tuning magnetic monopole population and mobility in unidirectional array of nanomagnets as a function of lattice parameters
APPLIED PHYSICS LETTERS, 2019Attomolar Label-Free Detection of DNA Hybridization with Electrolyte-Gated Graphene Field-Effect Transistors
ACS SENSORS, 2019 -
Effect of argon ion energy on the performance of silicon nitride multilayer permeation barriers grown by hot-wire CVD on polymers
THIN SOLID FILMS, 2015Flexible organic-inorganic hybrid layer encapsulation for organic opto-electronic devices
PROGRESS IN ORGANIC COATINGS, 2015Impact of MgO Thickness on the Performance of Spin-Transfer Torque Nano-Oscillators
IEEE TRANSACTIONS ON MAGNETICS, 2015Degradation of all-inkjet-printed organic thin-film transistors with TIPS-pentacene under processes applied in textile manufacturing
ORGANIC ELECTRONICS, 2015Permeation barrier performance of Hot Wire-CVD grown silicon-nitride films treated by argon plasma
THIN SOLID FILMS, 2015Silicon nanowire arrays coupled with cobalt phosphide spheres as low-cost photocathodes for efficient solar hydrogen evolution
CHEMICAL COMMUNICATIONS, 2015Ultra-Compact 100 x 100 mu m(2) Footprint Hybrid Device with Spin-Valve Nanosensors
SENSORS, 2015 -
Piezoresistive sensors for force mapping of hip-prostheses
SENSORS AND ACTUATORS A-PHYSICAL, 2013 -
Integration of Magnetoresistive Biochips on a CMOS Circuit
IEEE TRANSACTIONS ON MAGNETICS, 2012Scanning tunneling spectroscopy of epitaxial graphene nanoisland on Ir(111)
NANOSCALE RESEARCH LETTERS, 2012Magnetic Response and Spin Polarization of Bulk Cr Tips for In-Field Spin-Polarized Scanning Tunneling Microscopy
JAPANESE JOURNAL OF APPLIED PHYSICS, 2012Atomic structure and spectroscopy of graphene edges on Ir(111)
PHYSICAL REVIEW B, 2012Effect of hot-filament annealing in a hydrogen atmosphere on the electrical and structural properties of Nb-doped TiO2 sputtered thin films
THIN SOLID FILMS, 2012 -
Direct Observation of Electron Confinement in Epitaxial Graphene Nanoislands
ACS NANO, 2011Switching Fields of Individual Co Nanoislands
IEEE TRANSACTIONS ON MAGNETICS, 2011
