To the 80th anniversary of the birthday of Professor Valeriy Arnoldovich Tyagai
Valery Arnoldovich Tyagai is one of the most talented scientists working at the Institute of Semiconductors of the Academy of Sciences of UkrSSR from 1963 to 1979.
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| Published in: | Semiconductor Physics Quantum Electronics & Optoelectronics |
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| Date: | 2018 |
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| Format: | Article |
| Language: | English |
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Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2018
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/215311 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | To the 80th anniversary of the birthday of Professor Valeriy Arnoldovich Tyagai / Yu. M. Shirshov // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2018. — Т. 21, № 4. — С. 436-437.— Бібліогр.: 9 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1860480424817459200 |
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| author | Shirshov, Yu. M. |
| author_facet | Shirshov, Yu. M. |
| citation_txt | To the 80th anniversary of the birthday of Professor Valeriy Arnoldovich Tyagai / Yu. M. Shirshov // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2018. — Т. 21, № 4. — С. 436-437.— Бібліогр.: 9 назв. — англ. |
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| container_title | Semiconductor Physics Quantum Electronics & Optoelectronics |
| description | Valery Arnoldovich Tyagai is one of the most talented scientists working at the Institute of Semiconductors of the Academy of Sciences of UkrSSR from 1963 to 1979.
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| first_indexed | 2026-03-23T18:59:57Z |
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Semiconductor Physics, Quantum Electronics & Optoelectronics, 2018. V. 21, N 4. P. 436-437.
© 2018, V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
436
History
To 80th anniversary of birthday of Professor
Valeriy Arnoldovich Tyagai
Valery Arnoldovich
Tyagai is one of the
most talented scientists
working at the Institute of Semiconductors of Academy
of Sciences of UkrSSR in 1963 – 1979.
Since 1961, he was the post-graduate student of the
Moscow Frumkin Institute of Electrochemistry, where
successfully defenced the PhD thesis and was invited in
1964 to work at the Institute of Semiconductors of
Academy of Sciences of UkrSSR. V. Tyagai was
involved in main investigation area of Department of
Surface Phenomena – fundamental bases of control of
electrophysical properties of semiconductors surface by
surface doping.
Due to all-round and fundamental education in the
field of theoretical physics and chemistry, V.A.Tyagai
provided a notable influence on scientific atmosphere in
those divisions which were engaged in studying the
physical phenomena on a real surface of semiconductors.
As a chemist, Valeriy Arnoldovich introduced some
new approaches to the semiconductor physics:
electrochemical etching, electroreflection,
chromatography, electrode potential, etc.
In 1974, V.A.Tyagai has headed new department
No 21 at the Institute. Here, he gave start at least to two
fresh directions of researches: (1) application of
electrooptical effects at the boundary pure semiconductor
surface – electrolyte, and (2) detailed research of noise at
the boundary semiconductor – electrolyte.
The first of them allowed to reveal and explain
some the following new phenomena:
- additional interference of light in the area of a
strong field caused by the change of refraction under
conditions of electroreflection,
- influence of structural variations in ternary
semiconductor compounds on the spectrum of
fundamental absorption and dispersion of an electronic
spectrum in the area of a strong field,
- exciton disorder in the area of a strong field and so
on.
The second direction (use of the fundamental nature
of noise related with the current flow through a liquid –
crystal interface) was completely unique. It has led to
new conceptions in the field of electrochemistry, since it
showed an additional channel for identification of
electron transfer process when exchanging the ion charge
from a solution with the electronic ones in crystals over
the wide area of experimental conditions. This direction
was widely adopted at chemical Institutes both in the
former USSR, and abroad and became an integral part of
scientific conferences on electrochemistry.
As the man of effective idea generator, V.A. Tyagai
stimulated a wide range of researches of semiconductor-
electrolyte interface and adjacent areas not only at the
institutes of Ukraine, but also in St.-Petersburg, Moscow,
Novosibirsk and Tbilisi. Among his grateful co-authors,
there were tens the most different experts from physicists
to chemists and biologists.
Possessing strategist research intuition in a
combination with inventive talent, V.A. Tyagai based
practically important direction of sensor technique,
namely, the gas analysis by semiconductors. At the
Institute of Semiconductors, there were developed some
research areas with his direct participation:
- the effective electrooptical modulators of a light
beam;
- scanning laser control units for semiconductor
wafers quality control.
Some bright results, obtained at that time, could be
described as:
- Light interference in the area of a space charge in
crystals of cadmium sulphide. It has appeared that under
the influence of a strong field the refraction index in a
thin layer near the sample surface is changed. Owing to
this phenomenon, it is possible to observe interferential
colours in them.
- Influence of solid solution composition inherent to
double semiconductors on fundamental absorption of
crystals.
- Attraction of the current noise for identification of
mechanisms of charge transfer under electrochemical
reactions. This work appeared to be the pioneer one and
received a huge resonance.
The part of results of Tyagai’s scientific activity
was used in the excellent monograph “Electroreflection
of light in semiconductors”, which was estimated by
S.I. Pekar in due time as classical. Unfortunately, this
monograph was published already after sudden death of
Valery Tyagai in 1979. V.A. Tyagai was co-author of
more than 200 articles.
“It always seems to me cruel and premature death of
those who are preparing something immortal. … those
who think about future generations and want to live in
their works, always die prematurely, because death cuts
something from them.”
Pliny the younger 97 year.
SPQEO, 2018. V. 21, N 4. P. 436-437
To 80th anniversary of birthday of Professor Valeriy Arnoldovich Tyagai
437
Under the mentorship of Valeriy Tyagai the
«electronic tongue» (on the basis of a sensor array of
“silicon – electrolyte”) was created for the first time in
Ukraine. “The electronic nose” (adsorption of molecules
in polymeric materials) was proposed and realized as
well. These areas are under development at the Institute
of Semiconductor Physics up to now.
It is necessary to tell some words about Tyagai as
the person: he was the good son, brother, lovely husband,
father, great companion, excellent reader, reviewer,
singer of bard songs, author of comic couplets and fan to
go to campaigns and to ski. We thank the lucky stars in
time spent together.
Among the scientific school of Prof. Valeriy
Tyagai, we can enumerate Gennadiy Kolbasov, Yuriy
Shirshov, Vitaliy Bondarenko, Vadim Yarinovsky,
Natalia Petrova, Nina Samborskaya, Valeriy Sterligov,
Alexander Yevstigneyev, Alla Krasiko, Vitaliy
Omelchuk, Vadim Popov, Natalia Rastrenenko, Feliks
Nazarenkov, Olga Dubinskaya, but this is not a full list.
Main dates of V.A. Tyagai’s life
1938, 19 December – born in Kyiv.
1956 – entered the chemical department of Kyiv
Polytechnical Institute.
1961 – completed his studies at Kyiv Polytechnical
Institute.
1961 – joined to the Moscow Institute of
Electrochemistry, Academy of Sciences of the USSR.
1964, October – was conferred with the doctor’s degree
(Chemistry) with the title “Electrochemical properties of
Cadmium Sulphide single crystals”.
1964 – began to work at the Institute of Semiconductors,
Academy of Sciences of UkrSSR.
1967 – developed the method of chemical sensibilization
of cadmium sulphide single crystals.
1968 – first investigation of noise under anode oxidation
of cadmium sulphide.
1972 – research of strong field influence on
electroreflectance of oxidized silicon.
1973 – was conferred with the doctor’s degree
(Chemistry) “Electroreflectance of light and noise in
electrochemical systems”.
1974 – investigation of impurity electroreflectance and
electroabsorption of CdSe crystals.
1977 – study of photoelectrochemical processes at
semiconductor – electrolyte interface and their
application for recording the holograms.
1978 – head of the department of physics-and-chemistry
of semiconductor surface at the Institute of
Semiconductor Physics of the Academy of Sciences of
UkrSSR.
1979, 1 February – died in Kyiv.
Selected bibliography
1. Tyagai V.A., Pleskov Yu.V. Doklady of the
Academy of Sciences of the USSR. 10, 341 (1961).
2. Tyagai V.A., Pleskov, Yu.V., Solid State Physics
(1962).
3. Tyagai V.A., Izvestiya Akademii Nauk USSR
(1963).
4. Tyagai V.A., Electrochemistry (1965).
5. Tyagai V.A., Bondarenko V., Snitko O.V., Ukr. J.
Phys. (1967).
6. Tyagai V.A., Lukyanchikova N.B.,
Electrochemistry (1968).
7. Tyagai V.A., Evstigneyev O., Snitko O.V.,
Semiconductors (1972).
8. Tyagai V.A., Popov V.B., Bulakh B.,
Semiconductors, (1974).
9. Tyagai V.A., Sterligov V., Kolbasov G.,
Electrochimica Acta (1977).
Prof. Yu. M. Shirshov and disciples,
Editorial Board of SPQEO
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| id | nasplib_isofts_kiev_ua-123456789-215311 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1560-8034 |
| language | English |
| last_indexed | 2026-03-23T18:59:57Z |
| publishDate | 2018 |
| publisher | Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| record_format | dspace |
| spelling | Shirshov, Yu. M. 2026-03-12T08:51:53Z 2018 To the 80th anniversary of the birthday of Professor Valeriy Arnoldovich Tyagai / Yu. M. Shirshov // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2018. — Т. 21, № 4. — С. 436-437.— Бібліогр.: 9 назв. — англ. 1560-8034 https://nasplib.isofts.kiev.ua/handle/123456789/215311 Valery Arnoldovich Tyagai is one of the most talented scientists working at the Institute of Semiconductors of the Academy of Sciences of UkrSSR from 1963 to 1979. en Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України Semiconductor Physics Quantum Electronics & Optoelectronics History To the 80th anniversary of the birthday of Professor Valeriy Arnoldovich Tyagai Article published earlier |
| spellingShingle | To the 80th anniversary of the birthday of Professor Valeriy Arnoldovich Tyagai Shirshov, Yu. M. History |
| title | To the 80th anniversary of the birthday of Professor Valeriy Arnoldovich Tyagai |
| title_full | To the 80th anniversary of the birthday of Professor Valeriy Arnoldovich Tyagai |
| title_fullStr | To the 80th anniversary of the birthday of Professor Valeriy Arnoldovich Tyagai |
| title_full_unstemmed | To the 80th anniversary of the birthday of Professor Valeriy Arnoldovich Tyagai |
| title_short | To the 80th anniversary of the birthday of Professor Valeriy Arnoldovich Tyagai |
| title_sort | to the 80th anniversary of the birthday of professor valeriy arnoldovich tyagai |
| topic | History |
| topic_facet | History |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/215311 |
| work_keys_str_mv | AT shirshovyum tothe80thanniversaryofthebirthdayofprofessorvaleriyarnoldovichtyagai |