Advanced Non-Equilibrium Plasma Diagnostic

In the last two decades a rapid increase in research on nonequilibrium atmospheric-pressure discharges has occurred.  Applications covers the fields of material science, plasma assisted combustion, plasma medicine. The different devices used (surface discharge, jets, microdischarge) are strongly influenced by several processes, and show a transient behaviour strongly influenced by collisions.

In the presence of such characteristics, the development and deployment of optical diagnostics is an essential tools for the understanding of microscopic processes and the development of new innovative plasma tools.

In our lab the diagnostics tools available are the following:

Optical diagnostic techniques

Time-resolved imaging, on the nanosecond and sub-nanosecond  time scale, is used to visualize the breakdown mechanism in the streamer case or in the ‘plasma bullet’ propagation.  In the picture The ionization wave propagation in a nanosecond  volume discharge.

Surface DBD  single streamer nanosecond discharge.

Time and spatially resolved optical emission spectroscopy (TROES) reaching time resolution down to tens of ps.

TROES

Laser-based techniques (laser-induced fluorescence )(LIF), OODR LIF, TALIF .

The LIF techinique can be succesfully applied to monitor radicals , metastable with a time and spatial resolution limited by the laser characteristics,  and high sensitivity.

Laser-based techniques

Absorption based techniques, in its various versions of resonant, broad-band (BBAS), cavity enhanced (CEAS), cavity ring-down (CRDS).

Absorption based techniques

The quantities accessible to spectroscopic diagnostics are gas temperature, electron density, electric field and density of transient species, i.e. radicals and electronic metastable states.

Moreover  kinetics study of transient species can be perfomed and the experimental data used as input for computer modelling of the discharge kinetics.

Our experience in the discharge design enable us to apply the above mentioned techniques in specially designed discharges,  such as single streamer volume/surface dielectric barrier discharges (DBDs). Nevertheless our diagnostics tools can also be used in applicative systems.

Electrical characterizations.

Together with the above mentioned optical techiniques a ful set of electrical characterization tecniques is available including langmuir probes for electron density measurements,.

Acknowledgment.

Part of the experimental investigation reported in this page was perfomed in collaboration of dr. Milan Simek of the Institute of PlasmaPhysics Czech Academy of Science.  (Nanosecond streamer discharge) .

Selected Publications

Facilities & Labs

Energy Transfer in Plasmas @ Bari

People

PaoloFrancesco_AmbricoPaolo Francesco

Ambrico

CNR Researcher

Viso_UomoGiorgio

Dilecce

CNR Researcher

Publications

  1. Dilecce G., Optical spectroscopy diagnostics of discharges at atmospheric pressure, Plasma Sources Science and Technology Volume 23, Issue 1, February 2014, DOI: 1088/0963-0252/23/1/015011
  2. Martini, L.M., Dilecce, G., Guella, G., Maranzana A., Tonachini, G., Tosi, P., Oxidation of CH4 by CO2 in a dielectric barrier discharge, Chemical Physics Letters 593, pp. 55-60 (2014) DOI: 1016/j.cplett.2013.12.069
  3. Martini LM , Dilecce G , Scotoni M, Tosi P, De Benedictis S, OH Density Measurements by Time-Resolved Broad Band Absorption Spectroscopy in a He-H2O Dielectric Barrier Discharge With Small O-2 Addition, PLASMA PROCESSES AND POLYMERS Volume: 13   Issue: 2   Pages: 298-299   (2016) DOI:1002/ppap.201500020
  4. Dilecce, G., Martini, L.M., Tosi, P., Scotoni, M., De Benedictis, S., Laser induced fluorescence in atmospheric pressure discharges, Plasma Sources Science and Technology 24 (3), 034007 (2015) DOI: 10.1088/0963-0252/24/3/034007
  5. Simek, M.; Ambrico, P. F.; Prukner, V., LIF study of N-2(A(3)Sigma (+)(u), v=0-10) vibrational kinetics under nitrogen streamer conditions, JOURNAL OF PHYSICS D-APPLIED PHYSICS Volume: 48   Issue: 26     Article Number: 265202  (2015) DOI:1088/0022-3727/48/26/265202
  6. Ambrico P.F., Ambrico M., Schiavulli L., De Benedictis S., 2D Thermoluminescence imaging of dielectric surface long term charge memory of plasma surface interaction in DBD discharges, JOURNAL OF PHYSICS D-APPLIED PHYSICS   Volume: 47   Issue: 30     Article Number: 305201 (2014) DOI:1088/0022-3727/47/30/305201
  7. Ries D., Dilecce G., Robert E., Ambrico P.F., Ambrico M., Dozias S., Pouvesle J.M., LIF and fast imaging plasma jet characterization relevant for NTP biomedical applications, JOURNAL OF PHYSICS D-APPLIED PHYSICS Volume: 47   Issue: 27  Article Number: 275401 (2014) DOI:1088/0022-3727/47/27/275401
  8. Ratynskaia, S.; Dilecce, G.; Tolias, P, Nitrogen optical emission during nanosecond laser ablation of metals: prompt electrons or photo-ionization?, APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING Volume: 117   Issue: 1   Pages: 409-413  (2014) DOI:1007/s00339-014-8534-9

Projects

APULIA SPACE: Esperti nell’uso di tecnologia abilitanti nel settore dello spazio,  PON03PE_00067_6, (2014-2016)

Latest News

Loretta del Mercato, si aggiudica l'ERC STARTING GRANT 2017

Loretta del Mercato, si aggiudica  l'ERC STARTING GRANT 2017

uno dei bandi più competitivi a livello europeo.

Lecce, 6 settembre 2017 

Lo European Research Council, che promuove la ricerca di eccellenza in Europa, nei giorni scorsi ha reso noti i nomi dei 406 vincitori della selezione ERC STARTING GRANT 2017, il bando tra i più competitivi a livello internazionale.

Su 3085 progetti presentati, 406 i progetti selezionati a cui sono stati destinati i 605 i milioni di euro di investimento. 48 le nazioni di provenienza dei ricercatori, soltanto 17 gli Italiani che condurranno le loro ricerche nel nostro paese, tra cui Loretta del Mercato, ricercatrice dell'Istituto di Nanotecnologia del Consiglio Nazionale delle Ricerche di Lecce.

Un importante riconoscimento alla ricerca nel settore della medicina di precisione condotta presso il CNR NANOTEC, un indiscusso premio al talento della giovane ricercatrice che, a 38 anni e un contratto a tempo determinato, sarà a capo del progetto "Sensing cell-cell interaction heterogeneity in 3D tumor models: towards precision medicine – INTERCELLMED".

Il progetto, il cui obiettivo è affrontare uno dei problemi più spinosi della ricerca sul cancro, ovvero la difficoltà nel trasformare i risultati delle ricerche scientifiche in applicazioni cliniche per i pazienti e che vedrà coinvolto l'Istituto tumori "Giovanni Paolo II" di Bari, si propone di sviluppare nuovi modelli in vitro 3D di tumore del pancreas, alternativi ai modelli animali, ingegnerizzati con un set di sensori nanotecnologici che consentiranno di monitorare le interazioni delle cellule tumorali con il loro micorambiente, verificare l'appropriatezza delle terapie prima della somministrazione ai pazienti oncologici e quindi prevedere la risposta dei singoli pazienti ad una o più terapie antitumorali.

La realizzazione di queste piattaforme 3D multifunzionali consentirà di superare le evidenti differenze intercorrenti tra "modelli animali" ed esseri umani fornendo dati attendibili ed in tempi più rapidi rispetto ai dati ottenuti tramite lunghi e costosi procedimenti di sperimentazione sugli animali. Le tecnologie e i modelli sviluppati saranno estesi anche ad altre forme di tumori solidi nonché impiegati per studi nell'ambito della ingegneria tissutale e della medicina rigenerativa.

Rassegna stampa e Video

Zeiss Microscopy Technology and Complete Correlative Workflow

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Zeiss Microscopy Technology and Complete Correlative Workflow

Lecce, Italy, 2017 Wednesday July 19th 

CNR NANOTEC @ Lecce, Aula Seminari – pal. G, Piano Terra

Program - PDF

Zeiss, as microscopy technology leader, provides the unique complete imaging solution ranging from light, confocal, electron, ion and Xray modalities with a complete and straightforward correlative workflow. An overview of different technologies will be presented with a special focus on X-Rray microscopy.

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MCS 2017

International Workshop on Micropropulsion and CubeSats

Bari, Italy, 26 - 27 June 2017

Program - MSC2017

This narrow-field, invited-only meeting is the first attempt to bring together the Materials and Micropropulsion communities with a view to contribute to the development of the Global Materials and Micropropulsion Roadmap, and set such meetings to a regular basis.