Could anyone explain the way to find the conductivity or resistance of the TiO2 coated layer on the glass sheet?. Can we do it by autolab set up or there is any other simple way to do it ?. Thank you
You can create your own fixture. Use suitable power supply and current controlling resistance with voltage & current meter.
Take two suitable length wires with crocodile clip at one end (Let red & black wires). In series with selected resistor, through two wires, allow current to flow. Two crocodile clips to be connected together. Positive of PSU connect Resistor. Other end of resistor connect to Red wire and Black wire to negative of PSU. Note down the current at prefixed voltage say I1.
Now, introduce your sheet under test, between crocodile clips. Red wire crocodile clip to one end of sheet and Black wire crocodile to opposite end of sheet. Measure current keeping same voltage say I2.
I2/I1 = (R+Rx)/R. Value of R is known, I1 and I2 are measured. Unknown Rx can be calculated. Rx is the resistance of sheet over a length (or distance) between two crocodile clips when connected through sheet.
Hope this will help
Thank you sir for you answer but still I am not sure well about the method you explained. For your information I attached the TiO2 coated layer on the glass sheet. We want to find the conductivity or resistance of the white TiO2 layer as can be seen from the attached image. Regards
Could you elaborate your answer a bit more, please.
You can do it with Autolab Galvanostat/Potentiostat. Using any electrochemical method CV or DPV
TiO2 is an insulating film.
make a (metal-insulator-metal) MIM structure.
Take a metallized glass and coat you insulating TiO2 layer on top of the metal layer.
After this deposit top electrodes dots (say of about 0.5 to 1.0 mm diameter,).
You can make many top dots by depositing a metal layer through a shodow mask.
thus you have a MIM structure.
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Now you have to use a three terminal holder.
You can apply a dc voltage, and measure the current through you fabricated MIM structure.
In your calculations you must take into account the thickness (d) of the film, and the area of the top dot electrode.
You can easily find the dc conductivity of your deposited TiO2 film.
K. Sreenivas
It's called a Surface Resistance Meter and has 4 pins. It can be found if you Google for it. Price is about $1500 USD. Sold by many manufacturers.
Thanks for your answer. Could you just explain a bit more what is TLM and how it works?
you can measure conductivity by hall effect measurement and the resistivity you can measure with four point probe
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