Georgi Nadjakov

Georgi S. Nadjakov
Георги Стефанов Наджаков

Born	26 December 1896 Dupnitsa, Bulgaria
Died	24 February 1981 (1981-02-25) (aged 84) Sofia
Resting place	Central Sofia Cemetery
Nationality	Bulgarian
Alma mater	Sofia University
Scientific career
Fields	Physics
Institutions	Sofia University; Institute of Physics, Bulgarian Academy of Sciences

Georgi Nadjakov (also spelled Georgi Nadzhakov; George Nadjakoff) (Bulgarian: Георги Наджаков) (26 December 1896 – 24 February 1981) was a Bulgarian physicist. He was a corresponding member of the Göttingen Academy of Sciences (1940) in Germany, member of the Bulgarian Academy of Sciences (1945) and member of the Russian Academy of Sciences (1958).

Sofia University sent him to specialize in the laboratories of Paul Langevin and Marie Curie in Paris, where he investigated photoelectricity for one year.

Georgi Nadjakov experimentally investigated photoconducting properties of sulphur. He prepared the permanent photoelectret state of matter for the first time and published his paper in 1937 ^[1] and 1938.^[2] He called^{[citation needed]} the electret discovered by Mototaro Eguchi in 1919, thermoelectret and the electret discovered by him in 1937, photoelectret.^[3]^[4]
Photoelectrets were the most notable achievement of Georgi Nadjakov. Its practical application led to the invention of the photocopier by Chester Carlson some years later.

Since 1958 Nadjakov had been a member of the Pugwash Movement of Scientists for Peace.^[5]

Honours

Nadjakov Glacier on Graham Land in Antarctica is named after Georgi Nadjakov.
Institute of Solid State Physics is since 1982 known as Georgi Nadjakov Institute of Solid State Physics. Its predecessor was founded by Georgi Nadjakov in 1946.
The study of Georgy Nadjakov is a Historic Site of the European Physical Society since 23 May 2014.^[6]

References

^ Nadjakoff, Georgi (1937). "SUR UNE NOUVELLE ESPECE DE POLARISATION PERMANENTE DES DIELECTRIQUES". Comptes Rendus de l'Académie des Sciences de Paris. 204: 1865–1866.
^ Nadjakoff, G. (1938). "UBER EINE NEUE ART VON ELEKTRETEN: PHOTOELEKTRETEN". Physikalische Zeitschrift. 39 (6): 226–227.
^ "Photoelectret State of Matter". Archived from the original on 2021-12-21.
^ Kao, Kwan-Chi (2004). "5: Electrets". Dielectric Phenomena in Solids. Academic Press. p. 283. ISBN 978-0123965615. Retrieved 12 November 2013.
^ Rotblat, Joseph (1967). The Pugwash - The First Ten Years: History of the Conferences on Sciences and World Affairs. London: Heinemann. p. 95 – via Internet Archive.
^ "Georgi Nadjakov Study – EPS Historic Site".

External links

Academician George Stefanov Nadjakov, on the site of the Institute of Solid State Physics at the Bulgarian Academy of Sciences
Institute of Solid State Physics

External links

Rotblat, Joseph (1972). Scientists in the Quest for Peace: A History of the Pugwash Movement. Cambridge, MA and London: MIT Press. pp. 91, 156, 167, 183, 186, 196, 211, 219, 296, 316, 327, 357, 373.
"Founding Fathers: Georgi Nadjakov". Joint Institute for Nuclear Research. 8 January 2023. Retrieved 16 September 2023.