Read the bio below and try to give details on georgi nadjakov 's:    - death place     - fields     - death date     - workplaces       - birth date     - name     - nationality     - image     - birth place     - alma mater     Bio: georgi nadjakov -lrb- december 26 , 1896 - february 24 , 1981 -rrb- was a famous bulgarian physicist . he became a corresponding member of the göttingen academy of sciences -lrb- 1940 -rrb- in germany , member of the bulgarian academy of sciences -lrb- 1945 -rrb- and member of the russian academy of sciences -lrb- 1958 -rrb- . 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 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 .
A:
- death place is sofia- fields is physics- death date is 24 february 1981- workplaces is institute of physics , bulgarian academy of sciences- birth date is 26 december 1896- name is georgi s. nadjakov- nationality is bulgarian- image is gsnadjakov.jpg- birth place is dupnitsa , bulgaria- alma mater is sofia university