The official definition of nanoparticles is a 1-100nm size, but I found some publications that mention a range of 1-1000nm.
Certainly not. It just a range of micrometer particle into manometer. But being a micrometer or 1000nm it is the border line of a particle getting down the line t nano range and would ascribe slightly the features of nano range. For visibility it will be colloidal solution or suspension exhibiting Tyndall effect, Brownian motion and zeta potential etc
One cant distinguish nano particle as nano-sphere or nano-capsule. The reason is being so sub-micron the surface texture isn't so clear as you witness for micron sized particles. That is the region often they were called as nano particles unlike micro sphere or micro-capsule.
I too agree with above answers. In biomaterials engineering, diamaeter of 200nm isthe biggest diameter for being called a nanosphere, for example.
To assess whether a material falls within the definition of "nanomaterial" should not consider the size range but the "size distribution based on the number". There is no universally accepted definition, but generally we consider those nanomaterials that have 50% of the forms within the size distribution that falls in the range 1-100 nm.
Particles are generally recognized as nano-particles when the average droplet diameter is in the range of 20–200 nm . Although the range of particle diameter has been stated as high as 500 nm in the literature, this issue is still open for debate.
I think it's dependent on the field that you involved. For example, in the field of computer or engineering, ususally consider nanopaticles in a range of 1-100 nm.
However, in the pharmaceutical field, usually consider nanoparticles in a range of 10-1000 nm. However, if you get particles of 1000 nm. It is quite difficult, one may say that this is microparticles.
Yes, but in pharmaceutical or biomedical areas, 200nm is seen as the biggest nanoparticle; and the ones bigger than that are called as microparticles.
Material must show certain unique properties related to their size distribution as compered to their bulk counterpart either it is 1-100 or 1-1000 nm. In biological sciences where molecules are bigger in size as compered to metal or other inorganic materials, 1-1000 nm could be applied .
Anything with a dimension (only one of its dimensions will be enough) in submicron range is within the realm of nano.
Pretty much like 999 gr is not within kilogram domain or 999 meters is still not a kilometer.
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