Hi! Thank you for your suggestion. Short answer: As the size becomes smaller, the materials become stronger. The properties are actually proportional to how small an object is. Detailed answer: As known, atoms are the building blocks of matter. Atoms are made of subatomic particles, one of which is the electron. The electrons determine the properties of materials such as reactivity, magnetism and conductivity, among others. It is a standard physics (engineering) knowledge that as things get smaller, they become stronger. As we know, strength is a mechanical property that is related to the physical structure of the material. Further, as the size changes, the surface area also changes which is responsible for some properties. For example, the amount of exposed surface area increases drastically at the nanoscale level, which is the reason the reaction times for chemical reactions increase. Moreover, smaller particles have wider bandgaps. When the wavelength of the incident radiation targeted towards the particle is larger than the actual size, the surface plasmon resonance phenomenon becomes dominant to control the optical properties of nanomaterials. Other phenomena happens as well such as the transformation of nanoparticles to paramagnetic materials indicating some dominance in the surface layer.
@@saritamittal4491 I would suggest studying about two-dimensional materials like graphene, silicene, etc as they have wide range of applications in nanodevices, even as gas sensors and gas reservoirs. You may also want to read about transition metal dichalcogenides like NbSe2 as they have potential applications in superconductors. If you want quasi one dimensional materials, we also have carbon nanotubes which could be imagined as a rolled graphene, forming a timy cylinder of carbon based material. You may want to start reading review articles.
please tell why properties are changes when we go into nano
Hi! Thank you for your suggestion.
Short answer: As the size becomes smaller, the materials become stronger. The properties are actually proportional to how small an object is.
Detailed answer: As known, atoms are the building blocks of matter. Atoms are made of subatomic particles, one of which is the electron. The electrons determine the properties of materials such as reactivity, magnetism and conductivity, among others. It is a standard physics (engineering) knowledge that as things get smaller, they become stronger. As we know, strength is a mechanical property that is related to the physical structure of the material. Further, as the size changes, the surface area also changes which is responsible for some properties. For example, the amount of exposed surface area increases drastically at the nanoscale level, which is the reason the reaction times for chemical reactions increase. Moreover, smaller particles have wider bandgaps. When the wavelength of the incident radiation targeted towards the particle is larger than the actual size, the surface plasmon resonance phenomenon becomes dominant to control the optical properties of nanomaterials. Other phenomena happens as well such as the transformation of nanoparticles to paramagnetic materials indicating some dominance in the surface layer.
Thanku sir .. May u give me idea that i want to get depth knowledge about it .. So wht type of research papers i should search
@@saritamittal4491 I would suggest studying about two-dimensional materials like graphene, silicene, etc as they have wide range of applications in nanodevices, even as gas sensors and gas reservoirs. You may also want to read about transition metal dichalcogenides like NbSe2 as they have potential applications in superconductors. If you want quasi one dimensional materials, we also have carbon nanotubes which could be imagined as a rolled graphene, forming a timy cylinder of carbon based material. You may want to start reading review articles.