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  • Sefaattin Tongay
2015

Novel Optical and Electrical Transport Properties in Atomically Thin WSe2/MoS2 p–n Heterostructures

Huo, N., Tongay, S., Guo, W., Li, R., Fan, C., Lu, F., Yang, J., Li, B., Li, Y. & Wei, Z., 2015, In : Advanced Electronic Materials. 1, 5, 1400066.

Research output: Contribution to journalArticle

28 Scopus citations

Polarization and time-resolved photoluminescence spectroscopy of excitons in MoSe2 monolayers

Wang, G., Palleau, E., Amand, T., Tongay, S., Marie, X. & Urbaszek, B., Mar 16 2015, In : Applied Physics Letters. 106, 11, 112101.

Research output: Contribution to journalArticle

87 Scopus citations

Portlandite crystal: Bulk, bilayer, and monolayer structures

Aierken, Y., Sahin, H., Iyikanat, F., Horzum, S., Suslu, A., Chen, B., Senger, R. T., Tongay, S. & Peeters, F. M., Jun 12 2015, In : Physical Review B - Condensed Matter and Materials Physics. 91, 24, 245413.

Research output: Contribution to journalArticle

20 Scopus citations

Self-Passivation of Defects: Effects of High-Energy Particle Irradiation on the Elastic Modulus of Multilayer Graphene

Liu, K., Hsin, C. L., Fu, D., Suh, J., Tongay, S., Chen, M., Sun, Y., Yan, A., Park, J., Yu, K. M., Guo, W., Zettl, A., Zheng, H., Chrzan, D. C. & Wu, J., Nov 18 2015, In : Advanced Materials. 27, 43, p. 6841-6847 7 p.

Research output: Contribution to journalArticle

18 Scopus citations

Spin-orbit engineering in transition metal dichalcogenide alloy monolayers

Wang, G., Robert, C., Suslu, A., Chen, B., Yang, S., Alamdari, S., Gerber, I. C., Amand, T., Marie, X., Tongay, S. & Urbaszek, B., Jan 1 2015, In : Nature communications. 6, 10110.

Research output: Contribution to journalArticle

97 Scopus citations

Thermal tuning of infrared resonant absorbers based on hybrid gold-VO<inf>2</inf> nanostructures

Kocer, H., Butun, S., Banar, B., Wang, K., Tongay, S., Wu, J. & Aydin, K., Apr 20 2015, In : Applied Physics Letters. 106, 16, 161104.

Research output: Contribution to journalArticle

71 Scopus citations

Tuning the optical, magnetic, and electrical properties of ReSe2 by nanoscale strain engineering

Yang, S., Wang, C., Sahin, H., Chen, H., Li, Y., Li, S. S., Suslu, A., Peeters, F. M., Liu, Q., Li, J. & Tongay, S., Mar 11 2015, In : Nano Letters. 15, 3, p. 1660-1666 7 p.

Research output: Contribution to journalArticle

189 Scopus citations

Vibrational spectrum renormalization by enforced coupling across the van der Waals gap between Mo S 2 and W S 2 monolayers

Fan, W., Zhu, X., Ke, F., Chen, Y., Dong, K., Ji, J., Chen, B., Tongay, S., Ager, J. W., Liu, K., Su, H. & Wu, J., Dec 18 2015, In : Physical Review B - Condensed Matter and Materials Physics. 92, 24, 241408.

Research output: Contribution to journalArticle

13 Scopus citations

Visualizing nanoscale excitonic relaxation properties of disordered edges and grain boundaries in monolayer molybdenum disulfide

Bao, W., Borys, N. J., Ko, C., Suh, J., Fan, W., Thron, A., Zhang, Y., Buyanin, A., Zhang, J., Cabrini, S., Ashby, P. D., Weber-Bargioni, A., Tongay, S., Aloni, S., Ogletree, D. F., Wu, J., Salmeron, M. B. & Schuck, P. J., Aug 13 2015, In : Nature communications. 6, 7993.

Research output: Contribution to journalArticle

115 Scopus citations
2014

Doping against the native propensity of MoS2: Degenerate hole doping by cation substitution

Suh, J., Park, T. E., Lin, D. Y., Fu, D., Park, J., Jung, H. J., Chen, Y., Ko, C., Jang, C., Sun, Y., Sinclair, R., Chang, J., Tongay, S. & Wu, J., Dec 10 2014, In : Nano Letters. 14, 12, p. 6976-6982 7 p.

Research output: Contribution to journalArticle

317 Scopus citations

Elastic properties of chemical-vapor-deposited monolayer MoS2, WS2, and their bilayer heterostructures

Liu, K., Yan, Q., Chen, M., Fan, W., Sun, Y., Suh, J., Fu, D., Lee, S., Zhou, J., Tongay, S., Ji, J., Neaton, J. B. & Wu, J., Sep 10 2014, In : Nano Letters. 14, 9, p. 5097-5103 7 p.

Research output: Contribution to journalArticle

212 Scopus citations

Ferromagnetism in stacked bilayers of Pd/C60

Ghosh, S., Tongay, S., Hebard, A. F., Sahin, H. & Peeters, F. M., Jan 1 2014, In : Journal of Magnetism and Magnetic Materials. 349, p. 128-134 7 p.

Research output: Contribution to journalArticle

7 Scopus citations

Formation and stability of point defects in monolayer rhenium disulfide

Horzum, S., ÇakIr, D., Suh, J., Tongay, S., Huang, Y. S., Ho, C. H., Wu, J., Sahin, H. & Peeters, F. M., Apr 28 2014, In : Physical Review B - Condensed Matter and Materials Physics. 89, 15, 155433.

Research output: Contribution to journalArticle

89 Scopus citations

High-performance few-layer Mo-doped ReSe 2 nanosheet photodetectors

Yang, S., Tongay, S., Yue, Q., Li, Y., Li, B. & Lu, F., Jun 25 2014, In : Scientific reports. 4, 5442.

Research output: Contribution to journalArticle

66 Scopus citations

Layer-dependent electrical and optoelectronic responses of ReSe2 nanosheet transistors

Yang, S., Tongay, S., Li, Y., Yue, Q., Xia, J. B., Li, S. S., Li, J. & Wei, S. H., Jul 7 2014, In : Nanoscale. 6, 13, p. 7226-7231 6 p.

Research output: Contribution to journalArticle

116 Scopus citations

Monolayer behaviour in bulk ReS 2 due to electronic and vibrational decoupling

Tongay, S., Sahin, H., Ko, C., Luce, A., Fan, W., Liu, K., Zhou, J., Huang, Y. S., Ho, C. H., Yan, J., Ogletree, D. F., Aloni, S., Ji, J., Li, S., Li, J., Peeters, F. M. & Wu, J., Feb 6 2014, In : Nature communications. 5, 3252.

Research output: Contribution to journalArticle

524 Scopus citations

Optical properties of NbCl5 and ZnMg intercalated graphite compounds

Jung, E., Lee, S., Roh, S., Meng, X., Tongay, S., Kang, J., Park, T. & Hwang, J., Dec 3 2014, In : Journal of Physics D: Applied Physics. 47, 48, 485304.

Research output: Contribution to journalArticle

3 Scopus citations

Scalable enhancement of graphene oxide properties by thermally driven phase transformation

Kumar, P. V., Bardhan, N. M., Tongay, S., Wu, J., Belcher, A. M. & Grossman, J. C., Feb 1 2014, In : Nature Chemistry. 6, 2, p. 151-158 8 p.

Research output: Contribution to journalArticle

202 Scopus citations

Tuning interlayer coupling in large-area heterostructures with CVD-grown MoS2 and WS2 monolayers

Tongay, S., Fan, W., Kang, J., Park, J., Koldemir, U., Suh, J., Narang, D. S., Liu, K., Ji, J., Li, J., Sinclair, R. & Wu, J., Jun 11 2014, In : Nano Letters. 14, 6, p. 3185-3190 6 p.

Research output: Contribution to journalArticle

387 Scopus citations

Two-dimensional semiconductor alloys: Monolayer Mo1-xW xSe2

Tongay, S., Narang, D. S., Kang, J., Fan, W., Ko, C., Luce, A. V., Wang, K. X., Suh, J., Patel, K. D., Pathak, V. M., Li, J. & Wu, J., Jan 6 2014, In : Applied Physics Letters. 104, 1, 012101.

Research output: Contribution to journalArticle

100 Scopus citations

Ultrafast charge transfer in atomically thin MoS2/WS2 heterostructures

Hong, X., Kim, J., Shi, S. F., Zhang, Y., Jin, C., Sun, Y., Tongay, S., Wu, J., Zhang, Y. & Wang, F., Sep 2014, In : Nature nanotechnology. 9, 9, p. 682-686 5 p.

Research output: Contribution to journalArticle

995 Scopus citations
2013

Anomalous Raman spectra and thickness-dependent electronic properties of WSe2

Sahin, H., Tongay, S., Horzum, S., Fan, W., Zhou, J., Li, J., Wu, J. & Peeters, F. M., Apr 5 2013, In : Physical Review B - Condensed Matter and Materials Physics. 87, 16, 165409.

Research output: Contribution to journalArticle

285 Scopus citations

Band offsets and heterostructures of two-dimensional semiconductors

Kang, J., Tongay, S., Zhou, J., Li, J. & Wu, J., Jan 7 2013, In : Applied Physics Letters. 102, 1, 012111.

Research output: Contribution to journalArticle

851 Scopus citations

Broad-range modulation of light emission in two-dimensional semiconductors by molecular physisorption gating

Tongay, S., Zhou, J., Ataca, C., Liu, J., Kang, J. S., Matthews, T. S., You, L., Li, J., Grossman, J. C. & Wu, J., Jun 12 2013, In : Nano Letters. 13, 6, p. 2831-2836 6 p.

Research output: Contribution to journalArticle

441 Scopus citations

Defects activated photoluminescence in two-dimensional semiconductors: Interplay between bound, charged, and free excitons

Tongay, S., Suh, J., Ataca, C., Fan, W., Luce, A., Kang, J. S., Liu, J., Ko, C., Raghunathanan, R., Zhou, J., Ogletree, F., Li, J., Grossman, J. C. & Wu, J., Sep 23 2013, In : Scientific reports. 3, 2657.

Research output: Contribution to journalArticle

541 Scopus citations

Environmentally stable/self-powered ultraviolet photodetectors with high sensitivity

Yang, S., Tongay, S., Li, S. S., Xia, J. B., Wu, J. & Li, J., Oct 21 2013, In : Applied Physics Letters. 103, 14, 143503.

Research output: Contribution to journalArticle

19 Scopus citations

Mechanically modulated tunneling resistance in monolayer MoS2

Fu, D., Zhou, J., Tongay, S., Liu, K., Fan, W., King Liu, T. J. & Wu, J., Oct 28 2013, In : Applied Physics Letters. 103, 18, 183105.

Research output: Contribution to journalArticle

31 Scopus citations

Metal to semiconductor transition in metallic transition metal dichalcogenides

Li, Y., Tongay, S., Yue, Q., Kang, J., Wu, J. & Li, J., Nov 7 2013, In : Journal of Applied Physics. 114, 17, 174307.

Research output: Contribution to journalArticle

18 Scopus citations

Monolayer semiconducting transition metal dichalcogenide alloys: Stability and band bowing

Kang, J., Tongay, S., Li, J. & Wu, J., Apr 14 2013, In : Journal of Applied Physics. 113, 14, 143703.

Research output: Contribution to journalArticle

132 Scopus citations

Performance improvement of organic light emitting diode with aluminum oxide buffer layer for anode modification

Zhou, L., Zhuang, J. Y., Tongay, S., Su, W. M. & Cui, Z., Aug 21 2013, In : Journal of Applied Physics. 114, 7, 074506.

Research output: Contribution to journalArticle

22 Scopus citations

Stable p- and n-type doping of few-layer graphene/graphite

Meng, X., Tongay, S., Kang, J., Chen, Z., Wu, F., Li, S. S., Xia, J. B., Li, J. & Wu, J., Jun 1 2013, In : Carbon. 57, p. 507-514 8 p.

Research output: Contribution to journalArticle

25 Scopus citations

Work function engineering of single layer graphene by irradiation-induced defects

Kim, J. H., Hwang, J. H., Suh, J., Tongay, S., Kwon, S., Hwang, C. C., Wu, J. & Young Park, J., Oct 21 2013, In : Applied Physics Letters. 103, 17, 171604.

Research output: Contribution to journalArticle

79 Scopus citations
2012

Current transport across the pentacene/CVD-grown graphene interface for diode applications

Berke, K., Tongay, S., McCarthy, M. A., Rinzler, A. G., Appleton, B. R. & Hebard, A. F., Jun 27 2012, In : Journal of Physics Condensed Matter. 24, 25, 255802.

Research output: Contribution to journalArticle

30 Scopus citations

Drawing graphene nanoribbons on SiC by ion implantation

Tongay, S., Lemaitre, M., Fridmann, J., Hebard, A. F., Gila, B. P. & Appleton, B. R., Feb 13 2012, In : Applied Physics Letters. 100, 7, 073501.

Research output: Contribution to journalArticle

30 Scopus citations

Extinction of ferromagnetism in highly ordered pyrolytic graphite by annealing

Miao, X., Tongay, S. & Hebard, A. F., Apr 1 2012, In : Carbon. 50, 4, p. 1614-1618 5 p.

Research output: Contribution to journalArticle

14 Scopus citations

High efficiency graphene solar cells by chemical doping

Miao, X., Tongay, S., Petterson, M. K., Berke, K., Rinzler, A. G., Appleton, B. R. & Hebard, A. F., Jun 13 2012, In : Nano Letters. 12, 6, p. 2745-2750 6 p.

Research output: Contribution to journalArticle

638 Scopus citations

Improved transfer of graphene for gated schottky-junction, vertical, organic, field-effect transistors

Lemaitre, M. G., Donoghue, E. P., McCarthy, M. A., Liu, B., Tongay, S., Gila, B., Kumar, P., Singh, R. K., Appleton, B. R. & Rinzler, A. G., Oct 23 2012, In : ACS nano. 6, 10, p. 9095-9102 8 p.

Research output: Contribution to journalArticle

71 Scopus citations

Low-temperature, site selective graphitization of SiC via ion implantation and pulsed laser annealing

Lemaitre, M. G., Tongay, S., Wang, X., Venkatachalam, D. K., Fridmann, J., Gila, B. P., Hebard, A. F., Ren, F., Elliman, R. G. & Appleton, B. R., May 7 2012, In : Applied Physics Letters. 100, 19, 193105.

Research output: Contribution to journalArticle

15 Scopus citations

Magnetic properties of MoS 2: Existence of ferromagnetism

Tongay, S., Varnoosfaderani, S. S., Appleton, B. R., Wu, J. & Hebard, A. F., Sep 17 2012, In : Applied Physics Letters. 101, 12, 123105.

Research output: Contribution to journalArticle

173 Scopus citations

Materials modifications using a multi-ion beam processing and lithography system

Appleton, B. R., Tongay, S., Lemaitre, M., Gila, B., Fridmann, J., Mazarov, P., Sanabia, J. E., Bauerdick, S., Bruchhaus, L., Mimura, R. & Jede, R., Feb 1 2012, In : Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 272, p. 153-157 5 p.

Research output: Contribution to journalArticle

11 Scopus citations

Multi-ion beam lithography and processing studies

Appleton, B. R., Tongay, S., Lemaitre, M., Gila, B., Hays, D., Scheuermann, A. & Fridmann, J., Dec 1 2012, Ion Beams - New Applications from Mesoscale to Nanoscale. p. 47-58 12 p. (Materials Research Society Symposium Proceedings; vol. 1354).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Rectification at graphene-semiconductor interfaces: Zero-gap semiconductor-based diodes

Tongay, S., Lemaitre, M., Miao, X., Gila, B., Appleton, B. R. & Hebard, A. F., Jul 5 2012, In : Physical Review X. 2, 1, p. 1-10 10 p.

Research output: Contribution to journalArticle

164 Scopus citations

Strain-induced suppression of weak localization in CVD-grown graphene

Miao, X., Tongay, S. & Hebard, A. F., Nov 28 2012, In : Journal of Physics Condensed Matter. 24, 47, 475304.

Research output: Contribution to journalArticle

5 Scopus citations

Thermally driven crossover from indirect toward direct bandgap in 2D Semiconductors: MoSe2 versus MoS2

Tongay, S., Zhou, J., Ataca, C., Lo, K., Matthews, T. S., Li, J., Grossman, J. C. & Wu, J., Nov 14 2012, In : Nano Letters. 12, 11, p. 5576-5580 5 p.

Research output: Contribution to journalArticle

758 Scopus citations
2011

Graphene/GaN Schottky diodes: Stability at elevated temperatures

Tongay, S., Lemaitre, M., Schumann, T., Berke, K., Appleton, B. R., Gila, B. & Hebard, A. F., Sep 5 2011, In : Applied Physics Letters. 99, 10, 102102.

Research output: Contribution to journalArticle

83 Scopus citations

Growth and characterization of multiferroic BiMnO3 thin films

Biswas, A., Jeen, H., Singh-Bhalla, G., Mickel, P. R., Voigt, K., Morien, C., Tongay, S. & Hebard, A. F., Apr 1 2011, In : Journal of Applied Physics. 109, 7, 074104.

Research output: Contribution to journalArticle

36 Scopus citations

Stable hole doping of graphene for low electrical resistance and high optical transparency

Tongay, S., Berke, K., Lemaitre, M., Nasrollahi, Z., Tanner, D. B., Hebard, A. F. & Appleton, B. R., Oct 21 2011, In : Nanotechnology. 22, 42, 425701.

Research output: Contribution to journalArticle

125 Scopus citations

Tuning Schottky diodes at the many-layer-graphene/semiconductor interface by doping

Tongay, S., Schumann, T., Miao, X., Appleton, B. R. & Hebard, A. F., May 1 2011, In : Carbon. 49, 6, p. 2033-2038 6 p.

Research output: Contribution to journalArticle

82 Scopus citations

Ultrapure multilayer graphene in bromine-intercalated graphite

Hwang, J., Carbotte, J. P., Tongay, S., Hebard, A. F. & Tanner, D. B., Jul 28 2011, In : Physical Review B - Condensed Matter and Materials Physics. 84, 4, 041410.

Research output: Contribution to journalArticle

14 Scopus citations