Nano Medicine the application of technology to do everything from drug delivery to repairing of cells. It is the application of tiny machines to the treatment and prevention of disease. Nano robots are advancements in Nano medicine as miniature surgeons. These machines help repair damaged cells they replicate themselves, correct genetic deficiencies by replacing or altering DNA molecules. For example artificial antibodies, antiviral, Nano robots,  artificial white and red Blood cells. These Nano machines could affect the behaviour of individual cells. Hormones or Dispense drugs as needed in people with deficiency states or chronic imbalance can be solved using implanted Nanotechnology devices.

Nano electronics holds few answers for how we might increase the capabilities of electronics devices when we reduce their weight and power consumption. Nano electronics and technology are widely used in all aspects of modern life. Life Safety, Healthcare, Transportation, Computing, Energy and Telecommunications are some of the major fields benefiting from the growth of Nano electronic applications

Molecular  Nanotechnology  a technological revolution which seeks nothing less than perfectibility. Molecular manufacturing technology can be clean and self-contained. Molecular Nano manufacturing will slowly transform our connection towards matter and molecules as clear as the computer changed our relationship to information and bits. It will help accurate, inexpensive control of the structure of matter.

Nanotoxicology is the study of the toxicity of nanomaterials. Because of quantum size effects and large surface area to volume ratio, nano materials have unique properties compared with their larger counterparts. Nanotoxicology is a branch of bionanoscience which deals with the study and application of toxicity of nanomaterials. Nanomaterials, even when made of inert elements like gold, become highly active at nanometer dimensions. Nanotoxicological studies are intended to determine whether and to what extent these properties may pose a threat to the environment and to human beings. For instance, Diesel nanoparticles have been found to damage the cardiovascular system in a mouse model.

Nanotopography refers to specific surface features which form or are generated at the nanoscopic scale. While the term can be used to describe a broad range of applications ranging from integrated circuits to microfluidics, in practice it typically applied to sub-micron textured surfaces as used in biomaterials research.

Nanofluidics is the study of the behavior, manipulation, and control of fluids that are confined to structures of nanometer (typically 1–100 nm) characteristic dimensions (1 nm = 10⁻⁹ m). Fluids confined in these structures exhibit physical behaviors not observed in larger structures, such as those of micrometer dimensions and above, because the characteristic physical scaling lengths of the fluid, (e.g. Debye length, hydrodynamic radius) very closely coincide with the dimensions of the nanostructure itself.

Nanoweapon is the name given to military technology currently under development which seeks to exploit the power of nanotechnology in the modern battlefield. People such as state agencies, criminals and enterprises could use nano-robots to eavesdrop on conversations held in private. Nanoparticles used in different military materials could potentially be a hazard to the soldiers that are wearing the material, if the material is allowed to get worn out. As the uniforms wear down it is possible for nanomaterial to break off and enter the soldiers’ bodies.

Nanotechnology ("nanotech") is manipulation of matter on an atomic, molecular, and supra molecular scale. The earliest, widespread description of nanotechnology referred to the particular technological goal of precisely manipulating atoms and molecules for fabrication of macro scale products, also now referred to as molecular nanotechnology. A more generalized description of nanotechnology was subsequently established by the National Nanotechnology Initiative, which defines nanotechnology as the manipulation of matter with at least one dimension sized from 1 to 100 nanometers. This definition reflects the fact that quantum mechanical effects are important at this quantum-realm scale, and so the definition shifted from a particular technological goal to a research category inclusive of all types of research and technologies that deal with the special properties of matter which occur below the given size threshold.

Nanotechnology refers to a broad range of tools, techniques and applications that simply involve particles on the approximate size scale of a few to hundreds of nanometers in diameter. Particles of this size have some unique physicochemical and surface properties that lend themselves to novel uses. Indeed, advocates of nanotechnology suggest that this area of research could contribute to solutions for some of the major problems we face on the global scale such as ensuring a supply of safe drinking water for a growing population, as well as addressing issues in medicine, energy, and agriculture.

Nanocomposite is a multiphase solid material where one of the phases has one, two or three dimensions of less than 100 nanometers (nm), or structures having nano-scale repeat distances between the different phases that make up the material. In the broadest sense this definition can include porous media, colloids, gels and copolymers, but is more usually taken to mean the solid combination of a bulk matrix and nano-dimensional phases differing in properties due to dissimilarities in structure and chemistry. The mechanical, electrical, thermal, optical, electrochemical, catalytic properties of the nanocomposite will differ markedly from that of the component materials. Size limits for these effects have been proposed, <5 nm for catalytic activity, <20 nm for making a hard magnetic material soft, <50 nm for refractive index changes, and <100 nm for achieving super paramagnetism, mechanical strengthening or restricting matrix dislocation movement.

The nanoscale usually refers to structures with a length scale applicable to nanotechnology, usually cited as 1–100 nanometers. therefore one nanometer is one-billionth of a meter.  The nanoscopic scale is a lower bound to the mesoscopic scale for most solids.

Nanoparticles that are obviously occurring or they are the incidental by products of combustion processes is usually physically, chemically varied and often termed as ultrafine particles.

Various geophysical and social weights are changing a move from fossil energizes to renewable and manageable vitality sources. To impact this progression, we should make the materials that will bolster developing vitality advancements.

Development of Nanotechnology and creating of Nanomaterials opened new perspectives for a number of areas of industry. These materials explain enlarged strength, toughness, biocompatibility, and can ensure higher service properties, reliability and systems.

Two significant chemical methods: high-temperature thermal putrefaction and liquid-liquid interface reaction, suitable for creating films of many metals and metal oxide nanoparticles

Nanotechnology has made great step forward in the making of new surfaces, new materials and new forms which also find application in the biomedical field

Molecular mimics are the theoretical possibility of sequence similarities among foreign and self-peptides which are sufficient in subsequent at cross-activation of autoreactive T or B cells by pathogen-derived peptides.

Nanotechnology is a considerable tool for combating cancer and is being put to use in other applications that may reduce pollution, greenhouse gas emissions, and help prevent diseases. Nanotechnology in Cancer is working to secure those nanotechnologies for cancer applications are developed responsibly.

Nano photonics is where photonics merges with Nano science and nanotechnology, and where spatial confinement considerably modifies light propagation and light-matter interaction.

The application of nanotechnology and nanomaterials is found in many cosmetic products which includes moisturisers, hair care products, make up and sunscreen. The first of these is the use of nanoparticles as UV filters.zinc oxide and Titanium dioxide are the main compounds used in these applications. Organic alternatives to these have also been developed.

Tissue engineering is one of the fast growing scientific area in this era which is used to create, repair, replace cells, tissues and organs by using cell or combinations of cells with biomaterials . biologically active molecules which helps to produce materials which very much resembles to body's native tissue/tissues.

Nanotechnology applications are being researched currently, tested and in some cases already applied across the entire scope of food technology, from agriculture to food processing, packaging and food supple