Ultrasensitive sensor for NO2 detection at room temperature, based on SAW devices

 

Team

Dr. Angela Mihaela BARACU, ([email protected])

Research Scientist grade III,
Simulation, Modelling and Computer-Aided Design Laboratory
She received BSc (2011) in electronics, from the University Politehnica of Bucharest, Faculty of Electronics, Telecommunications and Information Technology. In 2013 she became Master of Science in Microsystems and in 2018 she received the Ph.D. in Electronics and Telecommunications from the same University (thesis title: Technological improvements for sensors and MEMS).
Her main field of scientific interest is focused on design, micro-nanofabrication and characterization of sensors based on surface acoustic waves (SAW); fabrication and characterization of MEMS/RF-MEMS structures: cantilevers, membranes, microgrippers, radio frequency switches; development of optical lenses based on metasurfaces.
Dr. Baracu is coordinating two national projects: Ultrasensitive sensor for NO2 detection at room temperature, based on SAW devices <NO2SAW> PN-III-P1-1.1-PD-2021-0495 (2022-2024) and Molecular imprinting technique integrated with surface acoustic wave technology for the development of sensitive and selective sensors for glyphosate detection from water samples <GLYSens> PN-III-P2-2.1-PED-2021-3279 (2022-2024).  During 2013-2021 she coordinated one subsidiary project financed from structural funds (POC-G): Sensitive platform with SAW sensor for the detection of flammable, potentially explosive gases <SAWGAS> in collaboration with a Romanian company, Ctr. No. C77.3D/08.03.2018 (2018-2019) and has been involved in numerous international (ERANET, SEE-Grant EEA-RO-NO) and national (PN-III: PED, PCCDI) projects as a key member of the research team.

Her scientific activity has resulted in over 40 scientific papers presented at national and international conferences and published in prestigious ISI journals (author and co-author) and three patents.

Dr. Alexandru Muller ([email protected])

MS in Solid State Physics-1972; Ph.D. in Semiconductor Physics-1990, University of Bucharest; habilitated at the Politechnica Univ. Bucharest in the Electronics Telecommunications and Nanotechnology domain-2017.
In the early years of his career, he worked on the design manufacturing and characterization of silicon microwave diodes (varactor, pin, multiplier SRD’s) and GaAs Schottky diodes, developing new innovative technological processes and high-performance devices used in various industrial applications.
His PhD thesis was focused on a new physical model describing the switching behavior of narrow base pin diodes. This model was used in the optimization of the efficiency of microwave step recovery multiplier diodes. Results have been partially published in prestigious journals like Solid State Electronics and Solid State Phenomena (1989). After 1995 his activity was focused on Silicon, GaAs and GaN micromachining and nanoprocessing, manufacturing of RF MEMS components and circuits, manufacuring of microwave passive membrane supported circuits, micromachined inductors, filters and antennae, monolithically as well as hybrid integrated receiver modules. He was the leader of the first European project in the ISTtopic coordinated by an East European Country -the FP4 project MEMSWAVE (1998-2001), nominated in 2002 between the 10 finalists for the Descartes prize of the EC. Since 2006 his research work was focused on developing acoustic devices (SAWs and FBARs) based on micromachining and nanoprocessing of wide bandgap semiconductors (GaN, AlN). Very new results were obtained in manufacturing of FBAR and SAW on GaN/Si resonators operating in the GHz frequency range as well as and temperature and pressure sensors based on GaN/Si. Also Dr. Muller worked on analysis and application in sensors of superior propagation modes in GaN/Si and GaN membranes (Sezawa, respectively Lamb modes). These results represent the state of the art for this type of devices and were published in top journals in the topics (IEEE Electron Devices Lett., Sensors and Actuators A, Thin Solid Films, Journal of Micromechanics and Microengng., etc.) and at the prestigious conferences IEEE IMS MTT-S International Microwave Symposium (2014, 2016, 2018) and Transducers (2017 and 2019) both with a rejection rate higher than 50%. Dr. Muller was the coordinator the coordinator of the European MIMOMEMS Centre of Excellence (2008-2011). He was the coordinator of the Romanian team in European project on the AMICOM NoE. (2004-2007), and the coordinator of the Romanian team in the SMARTPOWER project (2011-2016) (coordinated by Thales TRT) where the IMT team has developed a GHz operating GaN/Si SAW sensor which was hybrid integrated with a GaN based HPA for airport radar applications. 
In the last years Dr. Müller was involved in novel ScAlN/Si SAW-type devices targeting surface acoustic wave/spin wave coupling and also in characterization techniques of microwave semiconductor devices and acoustic devices at cryogenic temperatures (1.5 – 6K) with/without magnetic field and also regarding devices, technology and characterization techniques for the quantum computing domain. He is the leader of the Romanian team in the first FET OPEN projects with Romanian involvement: CHIRON (2018-2022) and I-Qubits (2019-2023). He has co-authored in the last years (2018-2022) papers on these topics in Applied Phys. Letters, IEEE EDL, and IEEE Trans on Electron Devices) 

 

News

New! SURFACE ACOUSTIC WAVE SENSORS FOR NO2 DETECTION BASED ON SULFUR-DOPED GRAPHENE, A. M. Baracu, V. Buiculescu, L. A. Dinu, C. Brasoveanu, R. Müller, IMT Bucharest, Romania, CAS 2022, October 2022


Results

- Recent Progress on Nanomaterials for NO2 Surface Acoustic Wave Sensors, Nanomaterials 2022, 12(12), 2120; https://doi.org/10.3390/nano12122120

 


Project financed by UEFISCDI
PNIII, P1, Programme Human Resources, Postdoctoral research project,
PN-III-P1-1.1-PD-2021-0495, Contract no. 55 PD/2022.

 

Contact information

National Institute for Research and Development in Microtechnologies
IMT Bucharest
Project manager: Dr. Mihaela-Angela BARACU
E-mail: [email protected]