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PORTALE DELLA DIDATTICA

Surface Impedance Measurement

01TDFRU

A.A. 2018/19

Course Language

English

Course degree

Doctorate Research in Metrology - Torino

Course structure
Teaching Hours
Lezioni 20
Teachers
Teacher Status SSD h.Les h.Ex h.Lab h.Tut Years teaching
Grassini Sabrina Professore Associato ING-IND/23 20 0 0 0 1
Teaching assistant
Espandi

Context
SSD CFU Activities Area context
*** N/A ***    
2018/19
PERIODO: MARZO - APRILE Le misure di spettroscopia d’impedenza elettrochimica o EIS (Electrochemical Impedance Spectroscopy) sono un metodo semplice per valutare diversi fenomeni sia nel campo elettrochimico sia nel settore della bioingegneria. Anche se le misure d’impedenza vengono condotte a diverse frequenze, l’attenzione viene normalmente posta a parametri diversi da quelli comuni. In particolare, la natura della misura, che è intrinsecamente non stabile in un tempo medio-lungo, pone i problemi di incertezza in secondo piano. Questo corso cerca di evidenziare queste problematiche in particolare riguardo alle misure a bassa e bassissima frequenza (tra 1mHz e 1MHz), quando sono presenti tensioni spurie e marcate non-linearità, che richiedono specifiche precauzioni e tecniche di misurazione. Il corso prevede una parte teorica ed una sperimentale per dare agli studenti la possibilità di fare misure in laboratorio e di interpretarle attribuendo loro un significato fisico, legato al sistema in esame.
PERIOD: MARCH - APRIL Electrochemical Impedance Spectroscopy EIS, is a powerful though simple method to assess several phenomena both in the electrochemical and in the biomedical field. Even though the EIS is an impedance measurement performed at different frequencies, the focus is often on parameters that are different from the usual ones. Specifically, the nature of the measurand, which is inherently not stable, at least in medium-long terms, put the accuracy of measurement behind several other problems. This course addresses the problems related to measuring the impedance at low and mid frequencies (usually from 1mHz to 1MHz) in the presence of spurious voltages and in the presence of strong impedance non linearities, which require special attention during the measurements. The course provides theoretical lectures and some experimental activities giving the students the possibility of performing impedance measurements and fitting the obtained results.
- Definizione di EIS e problematiche di misura - Definizione di potenziale elettrochimico - Celle elettrochimiche ed elettrodi di riferimento - Componenti elettrici equivalenti (Warburg, CPE,....), loro significato ed uso per descrivere gli spettri di impedenza - Esempi di spettro e possibili interpretazione: studio dei diagrammi di Nyquist and Bode - Identificazione dei parametri di un circuito a partire dallo spetto - Misure di impedenza in laboratorio
- EIS definition and problem in practical measurements - Electrochemical potential definition - Electrochemical cells and reference electrodes - Electrical equivalent components (Warburg, CPE,....) and their meaning and use in describing the impedance spectra - Examples of spectrum and their interpretation: Nyquist and Bode plots and their study - EIS equivalent circuit fitting - Performing an EIS session
1st lecture - 16th September 2019 from 9.30 - 12.30 from 14.30 to 16.30 2nd lecture - 17th September 2019 from 9.30 - 12.30 from 14.30 to 16.30 3rd lecture - 18th September 2019 from 9.30 - 12.30 from 14.30 to 16.30 4th lecture - 19th September 2019 from 9.30 - 12.30 from 14.30 to 16.30 All lectures will be held in the Shannon Room (DET) located close to room 12. Supporting materials will be posted on the web site, and the attendance to the lectures is not mandatory; the exam will consist of a short presentation related to a subject agreed with the professor. The course and the exams will be held in time to collect the required points in this academic year.
1st lecture - 16th September 2019 from 9.30 - 12.30 from 14.30 to 16.30 2nd lecture - 17th September 2019 from 9.30 - 12.30 from 14.30 to 16.30 3rd lecture - 18th September 2019 from 9.30 - 12.30 from 14.30 to 16.30 4th lecture - 19th September 2019 from 9.30 - 12.30 from 14.30 to 16.30 All lectures will be held in the Shannon Room (DET) located close to room 12. Supporting materials will be posted on the web site, and the attendance to the lectures is not mandatory; the exam will consist of a short presentation related to a subject agreed with the professor. The course and the exams will be held in time to collect the required points in this academic year.
Modalità di esame:
Exam:


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