Tongay, Sefaattin - Arizona State University - School for Engineering of Matter Transport and Energy

个人简介

Biography. Sefaattin Tongay is currently a tenure-track professor in the School for Engineering of Matter, Transport and Energy at Arizona State University. Prior to his appointment at Arizona State, he has completed his postdoctoral studies at University of California, Berkeley at the Materials Science and Engineering Department with Professor Junqiao Wu. He received his doctorate at the University of Florida in 2010 working with Distinguish Professor Arthur F. Hebard. Prof. Tongay is an editorial member of IOP Applied Physics Review (impact factor 14) and Nature Publishing Journal Nature 2D Materials & Applications. He has authored +100 SCI-indexed research articles in prestigious journals such as Science, Nature Nanotechnology, Nature Physics, Nature Chemistry, Nature Communications, Nature Physics, Nano Letters, and Physical Review Letters [Google Scholar]. His work has been cited over +10,000 times. Currently, he has h-index of 45, and holds 5 key patents on electronic materials. His work received wide media coverage from Nature publications, Scientific American, MIT news, Science Daily, Phys.org, IOP nanotechweb, Gizmag, and various other media sources. He has been awarded various research grants by NSF Division of Materials Research (DMR), Civil, Mechanical and Manufacturing Innovation (CMMI) programs, Army Research Office, as well as two (2) different private companies. He has contributed to multiple grant proposals for Office of Naval Research (ONR), NSF, Department of Energy (DOE), and DARPA between 20014 and 2018.

研究领域

1. Development of New Class of Two-dimensional (2D) Materials In this trust, we engage one of a kind material growth and synthesis techniques to grow atomically thin materials in impressive wafer-scale sizes. We study not only transitional-metal dichalcogenides (TMDs) but also other layered materials those have not been realized before. 2. Applications Based on Low-Dimensional Materials Using 2D materials and their heterostructures, we are pushing the electronic, metamaterial, and photonic devices towards the ultimate limit of single unit cell to create multi-functional, flexible, environmentally stable, and highly efficient devices. 3. Fundamental Properties of Low-Dimensional Materials Owing to their low dimensionality, such materials possess rather unusual properties that do not exist in traditional 3D materials. Using wide range of measurement techniques we explore their properties at the nanoscale. Our research group specializes on optical, magnetic, electronic, and mechanical measurements and engages such techniques to reveal rich functionality / properties at ambient as well as extreme conditions (toxic gases, ion bombardment, high pressure, extreme current drive, cold-temperatures, and strain-stress). Optical Spectroscopy: Photoluminescence, Raman, Photoreflectance, scanning current, and photo-dielectric spectroscopy Physical Property Measurements: Electrical transport, magnetic property system, and dielectric – impedence techniques Surface Characterization: Nano-optical profilometry, Atomic force microscopy 4. Metamaterials & Plasmonics In this trust, we use Metamaterials & Plasmonics as an efficient tool to modulate the optical properties of low dimensional materials to realize one of a kind functionality and device performance.

近期论文

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Jin, H. Cai, E. Regan, H. Kleeman, Y. Shenr, K. Watanabe, T. Taniguchi, J. Kim, M. Iqbal, M. Shinner, A. Sengupta, A. Zettl, S. Tongay, and F. Wang*;“Imaging of Pure Spin-Valley Diffusion Current in WS2-WSe2 Heterostructures” Science 360 (6391), 893-896 (2018) [Impact factor: 37.2] Cai, B. Chen, M. Blei#, S. Chang, K. Wu, and S. Tongay*; “Abnormal band bowing effects in phase instability crossover region of GaSe1-xTex nanomaterials” Nature Communications, 9 (1), 1927 (2018) [Impact factor: 12.1] Selected for Editors’ Highlights and featured on Nature Communications Barbone, A. R-P. Montblanch, D. M. Kara, C. Palacios-Berraquero, A. R. Cadore, D. de Fazio, B. Pingault, E. Mostaani, H. Li, B. Chen, K. Watanabe, T. Taniguchi, S. Tongay*, G. Wang, A. C. Ferrari, and M. Atatüre “Charge-tuneable biexciton complexes in monolayer WSe2″Nature Physics, Accepted (2018) [Impact factor: 22] Waldherr, N. Lundt, M. Klaas, S. Betzold, M. Wurdack, V. Baumann, E. Estrecho, A. Nalitov, E. Cherotchenko, H. Cai, E. A. Ostrovkaya, A. V. Kavokin, S. Tongay, S. Klembt, S. Hofling, and C. Schneider “Observation of bosonic condensation in an atomically thin crystal embedded in a hybrid MoSe2-GaAs microcavity” Nature Communications, Accepted (2018) [Impact factor:12.1] [Invited] S. Tongay*;“Preface to a Special Topic: 2D Materials and Applications” Applied Physics Reviews 5 (1), 010401 (2018) [Impact factor: 14.3] Robert, M. A. Semina, F. Cadiz, M. Manca, E. Courtade, T. Taniguchi, K. Watanabe, H. Cai, S. Tongay, B. Lassagne, P. Renucci, T. Amand, X. Marie, M. M. Glazov, and B. Urbaszek*; “Optical spectroscopy of excited exciton states in MoS2 monolayers in van der Waals heterostructures” Physical Review Materials 2, 011001(R) (2018) [Impact factor: Not announced] E. Kim, Y. Lee, C. Ko, Y. Park, J. Yeo, Y. Chen, H-S Choe, F.I. Allen, J. Rho, S. Tongay, J. Wu, K. Kim, and C.P.Grigoropoulos;“Tuning the optical and electrical properties of MoS2 by selective Ag photo-reduction” Applied Physics Letters, 113, 013105 (2018) Y. Shen, B. Bohan, B. Chen, H. Cai, Y. Qin, B. Mu, and S. Tongay*; “Ultimate Control over Hydrogen Bond Formation and Reaction Rates for Scalable Synthesis of Highly Crystalline vdW MOF Nanosheets with Large Aspect-Ratio” Advanced Materials, Under revision (2018) [Impact factor: 19.7] K. Wu, B. Chen, M. Blei#, L. Liu, H. Cai, C. Brayfield, D. Wright, H. Zhuang, and S. Tongay*; “Phase transition across anisotropic superconducting NbS3 and direct gap semiconductor TiS3 at nominal titanium alloying limit”Advanced Materials Under review (2018) [Impact factor: 19.7] S. Yang, H. Li, H. Cai, K. Wu, Y. Shenr, H. Zhuang, and S.Tongay*; “Epitaxial synthesis of highly anisotropic 2D tellurene on select surfaces”Nature Communications, Under review (2018) [Impact factor:12.4] Y. Qin, A. Agarwal, X. Fan, H. Li, H. Cai, Y. Qin, Y. Shenr, and S. Tongay* “Nominal electronic doping of Ti into MoSe2 and WSe2 host vdW layers through chemical vapor transport technique” Nanoscale, Under review (2018) [Impact factor: 7] A. Agarwal, Y. Qin, B. Chen, M. Blei, K. Wu, L. Liu, Y. Shenr, D. Wright, M. D. Green, H. Zhuang, and S. Tongay*; “Anomalous Isoelectronic Chalcogen Rejection in 2D anisotropic vdW TiS3(1-x)Se3x trichalcogenides” Nanoscale [Impact factor:7] submitted (2018) X. Wang, Y. Shenr, S. Yangr, X. Zhang, W. Huang, S. Tongay*, and E. Cubukcu*; “Self-resonant Exciton-polaritons in an Ultrathin WS2 Photonic Crystal” Nature Nanotechnology Under review (2018) [Impact factor: 39] Yang, Y. Qin, B. Chen, V.O. Ozcelik, C. White, Y. Shenr, S. Yang, and S. Tongay*; “Novel Surface Molecular Functionalization Route To Enhance Environmental Stability of Tellurium-Containing 2D Layers” ACS Applied Materials & Interfaces, 9, 44625-4463 (2017) [Impact factor: 7.5] K. Wu, B. Chen, H. Cai, M. Blei#, J. Bennett#, S. Yang, D. Weight, Y. Shenr, and S. Tongay*; “Unusual Pressure Response of Vibrational Modes in Anisotropic TaS3“ Journal of Physical Chemistry C, 121, 28187-28193 (2017) [Impact factor: 4.5] M. Mannebach, C. Nyby, F. Ernst, Y. Zhou, J. Tolsma, Y. Li, M-J Sher, I. C. Tung, H. Zhou, Q. Zhang, K. L. Seyler, G. Clark, Y. Lin, D. Zhu, J. M. Glownia, M. E. Kozina, S. Song, S.Nelson, A. Mehta, S. Yu, A. Pant, OB Aslan, A. Raja, Y. Guo, A. DiChiara, W. Mao, L.Cao, S. Tongay, J. Sun, D. J. Singh, T.F. Heinz, X. Xu, A.H. MacDonald, E. Reed, H. Wen, A. M. Lindenberg*; “Dynamic Optical Tuning of Interlayer Interactions in the Transition Metal Dichalcogenides” Nano Letters, 17 (12), pp 7761–7766 (2017)