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Materials Science and Nanotechnology | Volume 2
May 21-22, 2018 | New York, USA
International Conference on
Nanoscience & Technology
I
n the present study, we set out to show that α-alumina
hollow nanoshell structure can exhibit an ultrahigh fracture
strength even though it contains a significant number of
nanopores. By systematically performing insitu mechanical
testing and finite element simulations, the high fracture
strength of an α-alumina hollow nanoshell structure can
be explained in terms of conventional fracture mechanics
even at the nanoscales. More importantly, by deriving
a fundamental understanding, we would be able to lay
down predictions and guidelines for the design of reliable
ceramic nanostructures for advanced GaN LEDs. To that end,
we demonstrated how our ultra-strong α-alumina hollow
nanoshell structures could be successfully incorporated into
GaN LEDs, thereby greatly improving the luminous efficiency
and output power of the LEDs
Speaker Biography
Choi is an AssociateProfessor in the department of materials science and engineering
at Seou National University. He earned his BS degree from Seoul National University,
MS degree from Stanford University and Ph.D. degree from MIT in Materials Science
and Engineering. He conducted his postdoctoral research at Karlsruhe Institute of
Technology in Germany and then worked as a principal research scientist at Korea
Institute of Science and Technology (KIST) before joining the Seoul National University.
He is currently serving as editorial boardmembers in several domestic and international
journals. At present, his work focuses on developing advanced structure materials for
extreme condition.
e:
insukchoi@snu.ac.krHigh fracture strength of alumina hollow nanostructures for high-efficiency GaN LEDs
In-Suk Choi
Seoul National University, South Korea