Georgi Nadjakov
Encyclopedia
Georgi Nadjakov is a famous Bulgaria
n physicist
. He became a corresponding member of the Göttingen Academy of Sciences (1940), member of the Bulgarian Academy of Sciences (1945) and member of the Russian Academy of Sciences
(1958).
Sofia University sent him to specialise in the laboratories of Paul Langevin and Marie Curie in Paris, where he investigated photoelectricity for one year.
Georgi Nadjakov investigated experimentally photoconducting properties of sulphur. He prepared permanent photoelectret state of matter for the first time in 1937. He called electret
founded by Egguchi thermoelectret and the electret, founded by him photoelectret.
Photoelectrets were the most considerable result of Goergi Nadjakov. One of its practical application led to the invention of the photocopier
by Chester Carlson
some years latter.
Bulgaria
Bulgaria , officially the Republic of Bulgaria , is a parliamentary democracy within a unitary constitutional republic in Southeast Europe. The country borders Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, as well as the Black Sea to the east...
n physicist
Physicist
A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...
. He became a corresponding member of the Göttingen Academy of Sciences (1940), member of the Bulgarian Academy of Sciences (1945) and member of the Russian Academy of Sciences
Academy of Sciences
An Academy of Sciences is a national academy or another learned society dedicated to sciences.In non-English speaking countries, the range of academic fields of the members of a national Academy of Science often includes fields which would not normally be classed as "science" in English...
(1958).
Sofia University sent him to specialise in the laboratories of Paul Langevin and Marie Curie in Paris, where he investigated photoelectricity for one year.
Georgi Nadjakov investigated experimentally photoconducting properties of sulphur. He prepared permanent photoelectret state of matter for the first time in 1937. He called electret
Electret
Electret is a dielectric material that has a quasi-permanent electric charge or dipole polarisation. An electret generates internal and external electric fields, and is the electrostatic equivalent of a permanent magnet. Oliver Heaviside coined this term in 1885...
founded by Egguchi thermoelectret and the electret, founded by him photoelectret.
Photoelectrets were the most considerable result of Goergi Nadjakov. One of its practical application led to the invention of the photocopier
Photocopier
A photocopier is a machine that makes paper copies of documents and other visual images quickly and cheaply. Most current photocopiers use a technology called xerography, a dry process using heat...
by Chester Carlson
Chester Carlson
Chester Floyd Carlson was an American physicist, inventor, and patent attorney born in Seattle, Washington....
some years latter.
External links
- Academician George Stefanov Nadjakov, on the site of the Institute of Solid State Physics (Bulgaria) of the Bulgarian Academy of SciencesBulgarian Academy of SciencesThe Bulgarian Academy of Sciences is the National Academy of Bulgaria, established in 1869. The Academy is autonomous and has a Society of Academicians, Correspondent Members and Foreign Members...