Tulsi, Yomery, Tumerkan and Fu-Chang at the 2015 IMS Affiliates Annual Meeting

Posted on by

Our group was very active at the at the 2015 IMS Affiliates Annual Meeting held on May 27 at UConn. Tulsi, Yomery, Tumerkan and Fu-Chang presented 4 posters. 

052715_Poster
Left to right: Mehmet Tumerkan Kesim, Tulsi Patel, Yomery Espinal, and Fu-Chang Sun

Tumerkan: Characterization of Ag/W Circuit Breaker Contacts After Dry, Humid, and Natural Aging, M. Tumerkan Kesim, Haibo Yu, Yu Sun, Jason Harmon, Jonathan Potter, Mark Aindow, S. Pamir Alpay

Tulsi: Additive Manufacturing, T. Patel, V. Sharma, G. Agarwal, E. Curry, S. Pamir Alpay, A. Dongare, J. Hancock, R. Hebert

Yomery: Pyroelectric and Dielectric Properties of Ferroelectric Films With Interposed Dielectric Buffer Layers, Y. Espinal, M. T. Kesim, I. B. Misirlioglu, S. Trolier-McKinstry, J. V. Mantese, and S. Pamir Alpay

Fu-Chang: Temperature dependent structural, elastic, and polar properties of ferroelectric polyvinylidene fluoride (PVDF) and trifluoroethylene (TrFE) copolymers, Fu-Chang Sun, Avinash M. Dongare, Alexandru D. Asandei, S. Pamir Alpay, Serge Nakhmanson

Yomery, Tumerkan and Burc’s study on ferroelectric films dielectric buffer layers published in Applied Physics Letters

Posted on by

Yomery, Tumerkan and alumnus Dr. Misirlioglu (Sabanci Univ) computed the dielectric and pyroelectric properties of  ferroelectric films with linear dielectric buffer layers. The calculations show that the dielectric and pyroelectric properties of such multilayers can be increased by the presence of the buffer compared to ferroelectric monolayers. The findings of this paper suggest that the performance of pyroelectric based energy conversion devices (thermal to electric and electric to thermal) could benefit from having interposed dielectric buffer layers between electrodes.

Pyroelectric and Dielectric Properties of Ferroelectric Films with Interposed Dielectric Buffer Layers, Y. Espinal, M. T. Kesim, I. B. Misirlioglu, S. Trolier-McKinstry, J. V. Mantese, and S. P. Alpay, Appl. Phys. Lett. 105, 232905, 2014.

 

Tumerkan and Dr. Misirlioglu show that higher pyroelectric properties can be achieved in layer-by-layer engineered ferroelectric superlattices.

Posted on by

Results of the theoretical study carried out in collaboration with alumnus Dr. Misirlioglu at Sabanci University published in Applied Physics Letters.

I. B. Misirlioglu, M. T. Kesim, and S. P. Alpay, “Layer Thickness and Period as Design Parameters to Tailor Pyroelectric Properties in Ferroelectric Superlattices,” Appl. Phys. Lett. 105, 172905 (2014).

Two presentations at MS&T 2014

Posted on by

“Optimization of Piezoelectric Properties of Perovskite Oxides through Strain Engineering,” H. Khassaf, F. Sun, S. P. Alpay, Symposium on Advances in Dielectric Materials and Electronic Devices, Materials Science & Technology 2014, Pittsburgh, PA(Oct. 2014).

“Enhanced Electrocaloric and Pyroelectric Response from Ferroelectric Multilayers,” M .T. Kesim, J. Zhang, L. W. Martin, S. P. Alpay, Symposium on Multifunctional Oxides, Materials Science & Technology 2014, Pittsburgh, PA (Oct. 2014).

Four invited talks by Yomery, Tumerkan, Fu-Chang, and Reza at the IMRC in Cancun, Mexico

Posted on by

Our group was very busy at the XXIII International Materials Research Congress last week. Yomery, Tumerkan, Fu-Chang, and Reza and collaborators presented four invited talks in the Symposium on Interfaces, Structure, and Domains in Ferroic and Multiferroic Material Systems.

“Tailoring the Dielectric Properties of Ferroelectric-Dielectric Multilayers,” M. T. Kesim, J. Zhang, M. W. Cole, and S. P Alpay

“Dielectric and Pyroelectric Properties of PZT with Buffer Layers,” M. T. Kesim, Y. Espinal, S. Trolier-McKinstry, J. V. Mantese, and S. P. Alpa

“Composition and Microstructure Effects on Voltage Induced Piezoelectricity for BaxSr(1-x)TiO3 Thin Films,” N. M. Sbrockey, T. Kalkur, E. Nowe, H. Khassaf, S. P. Alpay, G. S. Tompa

“Strain Engineering of Piezoelectric Properties of Strontium Titanate and Barium Strontium Titanate”, F. Sun, N. Khakpash, H. Khassaf, N. M. Sbrockey, G. S. Tompa, T. S. Kalkur, and S. P. Alpay

Congratulations Jialan, Liang and Tulsi

Posted on by

Commencement 2014 – fun afternoon with (Dr.) Jialan Zhang, (Dr.) Liang Dong, and Ms. Tulsi Patel. Congratulations!

Dr. (Mr.) Liang Dong, PhD Thesis: First Principles Study of Band Offsets and Band Bending of InxGa1-xN/GaN and Zn1-xBexO/ZnO Heterostructures and Quantum Wells

Dr. (Ms.) Jialan Zhang, PhD Thesis: Electrothermal Properties of Perovskite Ferroelectric Films

Ms. Tulsi Patel, MS Thesis: Structural Properties of Titanium Dioxide Films for Dye-Sensitized Solar Cell Applications

 

jia_liang_2014

SPA with Jialan and Liang

liang_2014

Liang and his family

tulsi_2014

Tulsi and her family