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Electronic Devices, Simulations of technology Athena-Atlas, Bio-nano-electronics

Our organisation type is:: University, Research institution, End user organisation

We are active in the following Technologies: User perspective, Hardware, sensors, actuators, Integration, Learning & Training, Other technology provider, Communication / Dissemination / Marketing, Project management

Applications: Health & wellness, Hobbies , Home care, Information and learning, Knowledge Transfer, Mobility, Safety, security, privacy, Skills enhancement, Social interaction, Supply with goods & chores, Work, Other

Our group - BioNEC Group (Biodevices and Nano-electronics of Cells)  is with the

"Politehnica" University of Bucharest, Romania, Faculty of Electronics Telecommunications and Information Technology, Microelectronics Department.

Address: Bdul Iuliu Maniu 1-3, District 6, Bucharest, Romania, Europe.

Head of the Group: Cristian Ravariu - Full Professor at UPB, Faculty of Electronics

Members and partners:

- Florin Babarada - Full Professor, UPB, Faculty of Electronics

- Dan Mihaescu - Assoc. Prof., UPB, Organic Chemistry

- Dan Cozma - Physicist, assoc. member to UPB

- Ala Bondarciuc - Clinician, Spectrum SRL; associated.

- C.Ionescu-Tirgoviste, Institute of Diabetes; associated;

- Sorin Arama, UMF, Faculty of Medicine; associated;

Each prior member has his own sub-team.

Areas of expertise:

Topic 1: Electron Devices

1.1. Modeling and simulations of nanoscale effect of the MOSFET transistors. Athena-Atlas technology-device coupling, Spice additional models. Applications to IC and SSC-S. Proposal for some new methods for Spice parameters extracting (VT, Theta, SS, deriv III). Coupling Alas-Spice-Logic mixed simulations in Silvaco. HIGHK : High-k Gate Dielectric Application.

1.2. SOI devices, nanoscale aspects, simulations, multi-layer <-> multi-valent logic, novel materials as Diamond, SiC, organic semiconductors; DC, AC, transient analysis and performances.

1.3. 3-D device simulations and study in agreement with aggressive technology;  

1.4. Organic electronics; simulations of OFET, simulations of OLED; solar cells with organic layers; organic insulators - applications in microwaves (collab. LAAS); experimental synthesis and new technologies for organic layers (collab. Organic Chemistry Dept). Searching specific applications.

1.5. Noise study in devices (pn, MOS, SOI, NOI, vacuum), then analysis in circuits by Spice, then applications in the biosignals or very small signal cropping from a noisy zone.

1.6. Thermal effects simulations in different devices (jpn, MOSFET, SOI, SIT, nano, Org); including 3D aspects; LAT.TEMP, Hot Electron/Hole Injection, Power dissipation, Hot carriers - HHI, HEI, Hot Electron Reliability.

1.7. Breakdown and reliability simulations in active or nano-devices (comparisons among many type: SOI/NOI, Tunnel-FET/MOSFET, Org-FET/TFT, SIT/PowerMOSFET etc; Hot Electron Reliability.

1.8. Tunnel-FETs, Fin-FET and Ferroelectric-Transistors modeling and simulation; DC, AC, transient analysis and performances; techiques of Atlas simulation of PZT.

1.9. Photodetectors and applications in optical communications; Cylindrical Avalanche Photodiode; User-defined Photo-Generation Rate. Noise in photodetectors modelling.

Topic 2: Electronic devices used as transducer for sensors

2.1. Pressure sensor as MOS/SOI transistor with piezoelectric / piezoresistive layer - work principle, modelling, design, optimization for an application, technology of manufacturing, simulations, possible experimental models.

2.2. Magnetotransistors: evolution from BJT, to MOS, to SOI, to nano-core-shell; work principle, modelling, design and optimization, simulation under magnetic stimulus, few technological tests, possible final product tests.

2.3. Thermal sensors for harsh environment / biological environment; particularities, work principle for pn junction with Si, SiC, or C, modeling and design, simulations, applications.

2.4. Ion sensors, chemical sensors: ISFET tranzistors as main transducers, modeling and simulation; new software creation for simulation of I-st and II-nd order conduction.

2.5. Radiation sensors and radiation detectors and devices working in radiation environment (collab. Lidia).

2.6. Simulations in Atlas of Solar Cells with light stimulus starting from Athena.

Topic 3: Fragments from Nanoscience

3.1. Synthesis of nano-materials: CNT, graphene, core-shell, others - at lab of Organic Chemistry

3.2. Applications of new/known nanomaterials for novel architecture of electron devices. - creation of p-type and n-type semiconductors by core-shell technique, etc.

3.3. New properties of Known nanodevices investigation: for SET, for SEM, Graphene-Transistor, Org-TFT, CNT-FET.

3.4. New nanodevice proposal and novel type of application in circuitry - aNOI transistor.

3.5. Vacuum nano-devices advances - in the NOI case. quantum effects; modeling. implementation and experimental validation.

3.6. Quantum effect modelling in nanoscale devices: strong modelling, math and physics of devices; starting by Quantum Tunnelling in a Silicon Diode; n-MOS in Atlas. Quantum in SET /NOI/aNOI.

Topic 4: Biodevices

4.1. Biosensors - as devices; modeling, including III-ord derivative, work principle; creation of software interface between Atlas and Bio-materials, new concepts. Experiments in collab. (IMT).

4.2. Technologies for biosensors in collab (Org. Chem, IMT, others)

4.3. Biomimetic devices <-> inspired by cellular nanoelectronics; parallel between CCD and along axonal conduction; 3D-effects; Myelin-Transistors; Huxley circuit optimization; techniques of simulations in Atlas using cylindrical coordinates in 3D structures. Searching potential applications.

Topic 5: Interferences with life sciences

5.1. Biomodeling: from nano-scale to macro-scale; modeling of the pharmacological reply.

5.2. Electrophysiology; biosignals cropping.

5.3. Cells investigations: Imagistics, electrical properties, cellular parameters monitoring and characterization, in collab (C. Moldovan , altii).

5.4. MM waves interaction by living matter, studies in collab (Spectrum UIF)


 Experience in previous research Projects  - more than 7 projects. 

Few details are available at:     = see  RESEARCH EXPERIENCE 


Contact details


Cristian Ravariu, Professor Dr. Eng.
Phone: +4021-4024840


Polytechnic University of Bucharest, Faculty of Electronics
Splaiul Independentei 313, 060042 Bucharest