1 nm = 10-9 meter. Materials having their sizes around 10 to 100 nm are called nanomaterials. Of course they show peculiar physical, chemical properties than their bulk counterpart due to their smaller size and large active surface area to total volume.

You can read the following:

https://en.wikipedia.org/wiki/Nanomaterials

https://www.niehs.nih.gov/health/topics/agents/sya-nano/index.cfm

every article or book will present to you nanomaterials as nano-dimension materials with specific properties, usually nano materials are created to enhance properties...to image and understand the difference is good to compare small object to big objects, kids and adult ;) let say materials in nano size tend to be more active...

Nanomaterials are those materials whose one or more dimensions may lie in the order of few tenth nm or comparably shorter. According to this criterion, nanomaterials may be quantum dots (0D), nano-wires/rods (1D), nano-sheets (2D) or 3D nanoparticles.

https://en.wikipedia.org/wiki/Nanomaterials

Any material which has a well controlled dimension of nano size called nano-material. read the attached articles.

Dear Abdalla Hassan Mihdy Jassim,

1. Nanomaterial :

Nanotechnologies involve designing and producing objects or structures at a very small scale, on the level of 100 nanometres (100 millionth of a millimetre) or less. Nanomaterials are one of the main products of nanotechnologies – as nano-scale particles, tubes, rods, or fibres. Nanoparticles are normally defined as being smaller that 100 nanometres in at least one dimension.

2. Nanoparticles of a material show different properties compared to larger particles of the same material :

Forces of attraction between surfaces can appear to be weak on a larger scale, but on a nanoscale they are strong. One reason for this is the surface area to volume ratio. In nanoparticles this is very large. Atoms on the surface of a material are often more reactive than those in the centre, so a larger surface area means the material is more reactive.

I hope I have answered your question.

With Best Wishes,

Samir G. Pandya

Nanomaterials are materials whose constituents have a mean size between 1 and 100 nanometers (1 nm = 0.000 000 001 m), according to a recommendation from the European Commission.

Brother Abdallah,

The nanomaterial is built of small nanoparticles and that distinguishes it with unique properties. These properties could be photoluminescent properties or mechanical properties. As an example, gold nanoparticles as a material has red color instead of the normal golden color. Another example, silicon as a bulk material doesn't have any photoluminescent properties, yet silicon nanocrystal has a photoluminescence property.

Here is a link that could help you to understand the meaning of nanomaterials.

https://en.wikipedia.org/wiki/Nanomaterials

Thanks,

Mahmud,

particles with size less or equal to 100 nm are regarded as nanomaterials.

The lower is the nanosize, the higher is the surface to volume ratio. This factor totally revolutionized the physical properties