Particles

What are Nanoparticles? A nanoparticle is a small object that behaves as a whole unit in terms of its transport and properties.

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Etymology From the Latin, "a share, part" Examples and Observations "Particles are short words. A subatomic particle is a particle smaller than an atom: it may be elementary or composite. Particle physics and nuclear physics concern themselves with the study of. Stacy Trasancos explains the most fascinating concepts of science in terms that anyone can understand. In particle physics, an elementary particle or fundamental particle is a particle whose substructure is unknown; thus, it is unknown whether it is composed of other.

Particles collide with solid blocks. Z particle, massive electrically neutral carrier particle of the weak force that acts upon all known subatomic particles. It is the neutral partner of the. The term "subatomic particle" is largely a retronym of 1960s made to distinguish a big number of baryons and mesons (that comprise hadrons) from particles that are.

Size of nanoparticles. In terms of diameter, fine particles cover a range between 1. Nanoparticles may or may not exhibit size- related properties that are seen in fine particles. Despite being the size of the ultrafine particles individual molecules are usually not referred to as nanoparticles. Nanoclusters have at least one dimension between 1 and 1. Nano powders on the other hand are agglomerates of ultrafine particles, nanoparticles, or nanoclusters. Nano particle sized crystals are called nanocrystals.

Particle definition, a minute portion, piece, fragment, or amount; a tiny or very small bit: a particle of dust; not a particle of supporting evidence. Synonyms for particle at Thesaurus.com with free online thesaurus, antonyms, and definitions. Dictionary and Word of the Day.

Colorized transmission electron micrograph showing chains of cobalt nanoparticles. Hight Walker/NISTNanoparticle research and uses. Nanoparticle research is currently the most studied branch of science with the number of uses of nanoparticles in various fields. The particles have wide variety of potential applications in biomedical, optical and electronic fields. History of nanoparticle research. The history of nanoparticle research is long and the use of these particles dates back to the 9th century in Mesopotamia when artisans used these to generate a glittering effect on the surface of pots. This lustre or glitter over pottery from the Middle Ages and Renaissance is due to a metallic film that was applied to the transparent surface of a glazing.

The lustre can still be visible if the film has resisted atmospheric oxidation and other weathering. The lustre is within the film itself which contained silver and copper nanoparticles dispersed homogeneously in the glassy matrix of the ceramic glaze. Artisans created the nanoparticles by adding copper and silver salts and oxides together with vinegar, ochre and clay, on the surface of previously- glazed pottery. Then the pots were placed into a kiln and heated to about 6. With the heat the glaze would soften, causing the copper and silver ions to migrate into the outer layers of the glaze.

Michael Faraday provided the first description, in scientific terms, of the optical properties of nanometer- scale metals in his 1. Uses and advantages of nanoparticles in medicine. Some of the uses of nanoparticles in biology and medicine include: Creating fluorescent biological labels for important biological markers and molecules in research and diagnosis of diseases. Drug delivery systems.

Particles To Moles

Gene delivery systems in gene therapy. For biological detection of disease causing organisms and diagnosis. Detection of proteins. Isolation and purification of biological molecules and cells in research.

Probing of DNA structure. Genetic and tissue engineering. Destruction of tumours with drugs or heat. In MRI studies. In pharmacokinetic studies. Nanoparticles are being increasingly used in drug delivery systems. This could be used for both passive and active drug targeting. Nanoparticles can be made to control and sustain release of the drug during the transportation as well as the location of the release.

Since distribution and subsequent clearance of the drug from the body can be altered, an increase in drug therapeutic efficacy and reduction in side effects can be achieved. Choosing an appropriate matrix also helps in increasing the efficacy and reducing side effects.

Targeted drugs may be developed. Various routes of administration including oral, nasal, injection, intra- ocular (within the eyes) etc.