Electrodes can not be attached to one nanoparticle. Therefore, you can not measure the electrical conductivity of a nanoparticle. You can measure the electrical conductivity of a nanoparticle powder or nanoparticle dispersion by instruments called conductometers.

in addition to Yuri's answer, I would like to add this:

- you can press the nanoparticle powder and form a pressling which can be measured

- when measuring the conductivity of dispersions, you can make a serie of concentrations from low percentage to maximum filling degree and measure the conductivities of these various dispersions (you will find an S-shaped curve which tells you a lot about the character of your nanoparticles and their interactions with the dispersion matrix)

read this:

Chapter Conductive Polymers as Organic Nanometals

Article Dispersion-The key tool for understanding, improving and usi...

Article Electrical conductivity in heterogeneous polymer systems. V ...

- if you want to study using more advanced techniques, read this which allows you to measure the intrinsic conductivity of your nanoparticles:

Article EPR study of charge transfer in polyaniline highly doped by ...

Article EPR study of polyaniline highly doped by p-toluenesulfonic acid

I agree with Yuri Mirgorod and Bernhard Wessling, however, please refer to the attached article to have a different point of view.

@ Imad Disher ,

I read the article recommended by you. It describes a possible methodology for electrical measurements of nanoparticles. But there is no specific device in it that can measure the electrical conductivity of a nanoparticle.

@Yuri Mirgorod

Dear Sir,

First of all, I would like to thank you for all your valuable contributions on RG. I learned a lot from you.

Regarding the current issue, you are absolutely right. However, my point was NOT to give names for specific devices.

I tried to tell Vasu Babu that:

1) One need to think in different way, regarding the properties and testing, when he/she deals with nanomaterials.

2) Still there is a right way and a wrong way to measure the properties in nanoscale.

3) Nano-manipulators and nano-probing devices are available and their sensing and accurecy are under development.

I understand your point of view.

Imad Disher, interesting article, but it does not change my suggestions,

a) measure the conductivity contribution of nanoparticles in a dispersion

b) measure their intrinsic conductivity properties by EPR

@Bernhard Wessling

Dear Sir,

You gave practical and valuable suggestions.

I tried to highlight different issue.