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Volume 4 Nano Research & Applications
ISSN: 2471-9838
Notes:
JOINT EVENT
October 04-05, 2018 Moscow, Russia
&
2nd Edition of International Conference on
26th International Conference on Advanced Nanotechnology
Materials Technology and Manufacturing Innovations
Advanced Nanotechnology 2018
& Materials-Manufacturing 2018
October 04-05, 2018 Page 29
Shlomo Berger
Technion-Israel Institute of Technology, Israel
Shlomo Berger, Nano Res Appl 2018, Volume 4
DOI: 10.21767/2471-9838-C5-020
Developement of dielectric nano-crystal structures for highly sensitive piezoelectric detectors
N anocrystals made of nonlinear dielectric materials were grown inside alumina nano pores. The nano crystals are
characterized by a lowdielectric permittivity (such as sodiumnitrite, glycine, alanine and lithiumsulphate) required
for a high detection sensitivity of a small applied mechanical pressure (lower than 1 Pa). The crystals were grown inside
alumina nano pores arranged in a highly dense array (1011 pores/cm2) oriented in vertical to the aluminum substrate
plane. The pores have a major role in the nucleation and growth of the nano crystals with preferred crystallographic
orientations along the longitudinal axis of the pores. The preferred crystallographic orientation of the nano crystals can
be controlled and changed by the growth process parameters. The surface morphology, microstructure and composition
of the crystals were characterized. The piezoelectric response of the nanocrystals inside the pores was measured at an
applied mechanical pressure range of 0.1-100 Pa. The mechanism of nucleation and growth of the nano crystals inside
the alumina pores will be discussed. A correlation between the crystallographic orientation of the crystals and their
piezoelectric sensitivity will be presented.
Biography
Shlomo Berger has completed his PhD from the Technion Institute of Technology, Israel. He completed one year of a Postdoctoral degree at Harvard Univer-
sity, USA. Since then, he is a Faculty Member in the Faculty of Materials Science and Engineering, Technion, Israel. He has been studying dielectric nano
crystals over the past 15 years focusing on pyroelectric and piezoelectric properties of non-linear dielectric nano crystals. His research group developed a
unique process of growing low - k nano crystals with preferred crystallographic orientations leading to a highly sensitive detection of heat and mechanical
pressure. He presented his research work in many invited talks and reviewed scientific papers.