PUBLICATIONS


Journal Papers

  1. Y. An, H. Rao, G. Bosman and A. Ural, "Random telegraph signal and 1/f noise in forward-biased single-walled carbon nanotube film-Silicon Schottky junctions," accepted for publication in Applied Physics Letters (2012).

  2. Y. An, H. Rao, G. Bosman and A. Ural, "Characterization of carbon nanotube film-silicon Schottky barrier photodetectors,"  Journal of Vacuum Science and Technology B 30, 021805 (2012). PDF

  3. Y. Choi, M. Michan, J. L. Johnson, A. K. Naieni, A. Ural, and A. Nojeh, "Field-emission properties of individual GaN nanowires grown by chemical vapor deposition, " Journal of Applied Physics 111, 044308 (2012). PDF

  4. Y. Zhou, J. L. Johnson, A. Ural, and H. Xie, "Localized growth of carbon nanotubes on CMOS substrate at room temperature using maskless post-CMOS processing," IEEE Transactions on Nanotechnology 11, 16 (2012). PDF

  5. J. L. Johnson, A. Behnam, Y. An, S. J. Pearton and A. Ural, "Experimental study of graphitic nanoribbon films for ammonia sensing", Journal of Applied Physics  109, 124301 (2011). PDF

  6. A. Behnam, J. L. Johnson, Y. An, A. Biswas and A. Ural, "Electronic transport in graphitic nanoribbon films", ACS Nano  5, 1617 (2011). PDF

  7. A. Behnam, N. A. Radhakrishna, Z. Wu and A. Ural, "Electronic properties of metal-semiconductor and metal-oxide-semiconductor structures composed of carbon nanotube film on silicon", Applied Physics Letters  97, 233105 (2010). PDF

  8. J. L. Johnson, A. Behnam, S. J. Pearton, and A. Ural, "Hydrogen sensing using Pd-functionalized multi-layer graphene nanoribbon networks," Advanced Materials 22, 4877 (2010). PDF

  9. V. K. Sangwan, A. Behnam, V. W. Ballarotto, M. S. Fuhrer, A. Ural, and E. D. Williams, "Optimizing transistor performance of percolating carbon nanotube networks," Applied Physics Letters 97, 043111 (2010). PDF

  10. A. Behnam, A. Biswas, G. Bosman, and A. Ural, “Temperature-dependent transport and 1/f noise mechanisms in single-walled carbon nanotube films,” Physical Review B 81, 125407 (2010). PDF

  11. S. A. Vitusevich, V. A. Sydoruk, M. V. Petrychuk, B. A. Danilchenko, N. Klein, A. Offenhäusser, A. Ural, and G. Bosman, “Transport properties of single-walled carbon nanotube transistors after gamma radiation treatment,” Journal of Applied Physics 107, 063701 (2010). PDF

  12. J. S. Wright, W. Lim, D. P. Norton, S. J. Pearton, F. Ren, J. L. Johnson, and A. Ural, “Nitride and oxide semiconductor nanostructured hydrogen gas sensors,” Semiconductor Science and Technology 25, 024002 (2010). PDF

  13. J. Hicks, A. Behnam, and A. Ural, “A computational study of tunneling-percolation electrical transport in graphene-based nanocomposites,” Applied Physics Letters 95, 213103 (2009). PDF

  14. J. Hicks, A. Behnam, and A. Ural, “Resistivity in percolation networks of one dimensional elements with a length distribution,” Physical Review E 79, 012102 (2009).  PDF

  15. Y. Choi, J. L. Johnson, and A. Ural, “Patterned growth of silicon oxide nanowires from iron ion implanted SiO2 substrates,” Nanotechnology 20, 135307 (2009). (cover feature) PDF

  16. J. L. Johnson, Y. Choi, A. Ural, W. Lim, J. S. Wright, B. P. Gila, F. Ren, and S. J. Pearton, “Growth and characterization of GaN nanowires for hydrogen sensors,” Journal of Electronic Materials 38, 490 (2009). PDF

  17. J. S. Wright, W. Lim, B. P. Gila, S. J. Pearton, J. L. Johnson, A. Ural, and F. Ren, “Hydrogen sensing with Pt-functionalized GaN nanowires,” Sensors and Actuators B: Chemical 140, 196 (2009).  PDF

  18. A. Behnam, G. Bosman, and A. Ural, “Percolation scaling of 1/f noise in single-walled carbon nanotube films,” Physical Review B 78, 085431 (2008). PDF

  19. A. Behnam, J. L. Johnson, Y. Choi, M. G. Ertosun, A. K. Okyay, P. Kapur, K. C. Saraswat, and A. Ural, “Experimental characterization of single-walled carbon nanotube film-Si Schottky contacts using metal-semiconductor-metal structures,” Applied Physics Letters 92, 243116 (2008). PDF

  20. W. Lim, J. S. Wright, B. P. Gila, J. L. Johnson, A. Ural, T. Anderson, F. Ren, and S. J. Pearton, “Room temperature hydrogen detection using Pd-coated GaN nanowires,” Applied Physics Letters 93, 072109 (2008).  PDF

  21. J. L. Johnson, Y. Choi, and A. Ural, “GaN nanowire and Ga2O3 nanowire and nanoribbon growth from ion implanted iron catalyst,” Journal of Vacuum Science and Technology B 26, 1841 (2008).  PDF

  22. A. Behnam, J. Johnson, Y. Choi, L. Noriega, M. G. Ertosun, Z. Wu, A. G. Rinzler, P. Kapur, K. C. Saraswat, and A. Ural, “Metal-semiconductor-metal photodetectors based on single-walled carbon nanotube film–GaAs Schottky contacts,” Journal of Applied Physics 103, 114315 (2008).  PDF

  23. A. Behnam, J. Guo, and A. Ural, “Effects of nanotube alignment and measurement direction on percolation resistivity in single-walled carbon nanotube films,” Journal of Applied Physics 102, 044313 (2007).  PDF

  24. A. Behnam and A. Ural, “Computational study of geometry-dependent resistivity scaling in single-walled carbon nanotube films,” Physical Review B 75, 125432 (2007).  PDF

  25. A. Behnam, Y. Choi, L. Noriega, Z. Wu, I. Kravchenko, A. G. Rinzler, and A. Ural, “Nanolithographic patterning of transparent, conductive single-walled carbon nanotube films by inductively coupled plasma reactive ion etching,Journal of Vacuum Science and Technology B 25, 348 (2007).  PDF

  26. Y. Choi, J. Sippel-Oakley, and A. Ural, “Single-walled carbon nanotube growth from ion implanted Fe catalyst,” Applied Physics Letters 89, 153130 (2006).  PDF

  27. Y. Choi, J. Johnson, R. Moreau, E. Perozziello, and A. Ural, “Micromachined silicon transmission electron microscopy grids for direct characterization of as-grown nanotubes,” Nanotechnology 17, 4635 (2006).  PDF

  28. A. Behnam, L. Noriega, Y. Choi, Z. Wu, A. G. Rinzler, and A. Ural, “Resistivity scaling in single-walled carbon nanotube films patterned to submicron dimensions,” Applied Physics Letters 89, 093107 (2006).  PDF

  29. A. Nojeh, A. Ural, R. F. Pease, and H. Dai, "Electric-field-directed growth of carbon nanotubes in two dimensions," Journal of Vacuum Science & Technology B 22, 3421 (2004).  PDF

  30. Y. Li, D. Mann, M. Rolandi, W. Kim, A. Ural, S. Hung, A. Javey, J. Cao, D. Wang, E. Yenilmez, Q. Wang, J. F. Gibbons, Y. Nishi, and H. Dai, “Preferential growth of semiconducting single-walled carbon nanotubes by a plasma enhanced CVD method,” Nano Letters 4, 317 (2004).  PDF

  31. A. Ural, Y. Li, and H. Dai, “Electric-field-aligned growth of single-walled carbon nanotubes on surfaces,” Applied Physics Letters 81, 3464 (2002). PDF

  32. A. Javey, H. Kim, M. Brink, Q. Wang, A. Ural, J. Guo, P. McIntyre, P. McEuen, M. Lundstrom, and H. Dai, “High k dielectrics for advanced carbon nanotube transistors and logic,” Nature Materials 1, 241 (2002).  PDF

  33. A. Javey, Q. Wang, A. Ural, Y. Li, and H. Dai, “Carbon nanotube transistor arrays for multistage complementary logic and ring oscillators,” Nano Letters 2, 929 (2002).  PDF

  34. A. Ural, P. B. Griffin, and J. D. Plummer, “Atomic-scale diffusion mechanisms via interme­diate species,” Physical Review B 65, 134303 (2002).  PDF

  35. A. Ural, P. B. Griffin, and J. D. Plummer, “Silicon self-diffusion under extrinsic conditions,” Applied Physics Letters 79, 4328 (2001).  PDF

  36. A. Ural, P. B. Griffin, and J. D. Plummer, “Ural, Griffin, and Plummer reply,” Physical Review Letters 85, 4836 (2000).  PDF

  37. A. Ural, P. B. Griffin, and J. D. Plummer, “Self-diffusion in silicon: Similarity between the properties of native point defects,” Physical Review Letters 83, 3454 (1999).  PDF

  38. A. Ural, P. B. Griffin, and J. D. Plummer, “Fractional contributions of microscopic diffusion mechanisms for common dopants and self-diffusion in silicon,” Journal of Applied Physics 85, 6440 (1999).  PDF

  39. A. Ural, P. B. Griffin, and J. D. Plummer, “Nonequilibrium experiments on self-diffusion in silicon at low temperatures using isotopically enriched structures,” Physica B 273, 512 (1999).  PDF

  40. A. Ural, P. B. Griffin, and J. D. Plummer, “Experimental evidence for a dual vacancy-inter­stitial mechanism of self-diffusion in silicon,” Applied Physics Letters 73, 1706 (1998).  PDF

 

Conference Papers

  1. Y. An, J. L. Johnson, A. Behnam, S. J. Pearton, and A. Ural, “Sensing gas molecules using graphitic nanoribbon films and networks,” presented at the American Physical Society (APS) March Meeting, Dallas, TX (2011).

  2. V. A. Sydoruk, M. V. Petrychuk, A. Offenhusser, Ant Ural, G. Bosman, and S. A. Vitusevich, "Noise characterization of transport properties in single carbon nanotube field-effect transistors," presented at the 21st International Conference on Noise and Fluctuations (ICNF 2011), Toronto, Canada (2011).

  3. A. Behnam, N. Arkali Radhakrishna, and A. Ural, “Characterization of the metal-semiconductor and metal-insulator-semiconductor junctions between single-walled carbon nanotube films and Si substrates,” presented at the 2010 Device Research Conference (DRC), South Bend, IN (2010).

  4. A. Behnam, J. L. Johnson, Y. An, A. Biswas, and A. Ural, “Low temperature transport in networks based on multi-layer graphene nanoribbons,” presented at the American Physical Society (APS) March Meeting, Portland, OR (2010).

  5. N. Arkali Radhakrishna, A. Behnam, J. L. Johnson, and A. Ural, “Characterization of the junction between single-walled carbon nanotube films and silicon substrates,” presented at the American Physical Society (APS) March Meeting, Portland, OR (2010).

  6. A. Behnam, J. L. Johnson, Y. An, A. Biswas, and A. Ural, “Networks based on graphene nanoribbons: Structure and Electronic Transport,” presented at the Materials Research Society (MRS) Spring Meeting, San Francisco, CA (2010).

  7. N. Arkali Radhakrishna, A. Behnam, J. L. Johnson, and A. Ural, “Single-walled carbon nanotube film-silicon junctions,” presented at the Materials Research Society (MRS) Spring Meeting, San Francisco, CA (2010).

  8. Y. Choi, J. M. Michan, J. L. Johnson, A. K. Naeini, A. Ural, and A. Nojeh, “Field-emission properties of individual GaN nanowires grown by the vapour-liquid-solid method,” presented at the 14th Annual Meeting of the Pacific Centre for Advanced Materials and Microstructures (PCAMM), Burnaby, British Columbia, Canada (2009).

  9. J. L. Johnson, A. Behnam, J. S. Wright, S. J. Pearton, and A. Ural, “Large area, transparent, conductive graphene nanoribbon network gas sensors,” presented at the Nanoelectronic Devices for Defense and Security Conference (NANO-DDS 2009), Fort Lauderdale, FL (2009).

  10. N. Arkali Radhakrishna, A. Behnam, J. L. Johnson, and A. Ural, “Electrical characterization of the nanoscale interface between single-walled carbon nanotube films and silicon substrates,” presented at the Nanoelectronic Devices for Defense and Security Conference (NANO-DDS 2009), Fort Lauderdale, FL (2009).

  11. Y. Zhou, J. Johnson, A. Ural, and H. Xie "Carbon nanotube-CMOS integration based on a maskless post-CMOS process,” presented at the Nanoelectronic Devices for Defense and Security Conference (NANO-DDS 2009), Fort Lauderdale, FL (2009).

  12. J. L. Johnson, A. Behnam, and A. Ural, “Electrical and materials characterization of large area, transparent, conductive graphene film networks and their potential for gas sensing,” presented at the Materials Research Society (MRS) Fall Meeting 2009, Boston, MA (2009).

  13. A. Ural, “Electronic properties of carbon nanotube films and nanotube film-semiconductor junctions,” presented at the 215th Electrochemical Society (ECS) Meeting, San Francisco, CA (2009). (invited talk)

  14. A. Behnam, G. Bosman, and A. Ural, “Characterization and modeling of low frequency Noise in single-walled carbon nanotube film-based devices,” presented at the 2009 Device Research Conference (DRC), University Park, PA (2009).

  15. A. Behnam, G. Bosman, and A. Ural, “1/f noise in single-walled carbon nanotube films,” Proceedings of SPIE 7204, 72040J (2009).

  16. A. Behnam, A. Ural, and G. Bosman, “Modeling and measurements of low frequency noise in single-walled carbon nanotube films with bulk and percolation configurations,” AIP Conference Proceedings 1129, 79 (2009). (invited talk)

  17. E. Cicek, J. L. Johnson, A. Ural, and G. Bosman, “Defect noise spectroscopy results for GaN nanowires,” AIP Conference Proceedings 1129, 101 (2009).

  18. J. L. Johnson, Y. Choi, and A. Ural, “Ion implanted SiO2 substrates for nucleating silicon oxide nanowire growth,” presented at the Materials Research Society (MRS) Spring Meeting 2009, San Francisco, CA (2009).

  19. J. Hicks, A. Behnam, and A. Ural, “A computational study of electrical transport in graphene-based films and composites,” presented at the American Physical Society (APS) March Meeting 2009, Pittsburgh, PA (2009).

  20. A. Behnam, G. Bosman, and A. Ural, “Experimental and computational study of 1/f noise scaling in single-walled carbon nanotube percolation films,” presented at the American Physical Society (APS) March Meeting 2009, Pittsburgh, PA (2009).

  21. W. Lim, J. Wright, B. P. Gila, J. L. Johnson, A. Ural, T. Anderson, F. Ren, and S. J. Pearton, “Room temperature hydrogen detection using Pd-coated GaN nanowires,” presented at the Materials Research Society (MRS) Fall Meeting, Boston, MA (2008).

  22. Y. Zhou, J. Johnson, L. Wu, S. Maley, A. Ural, and H. Xie, “Design and fabrication of microheaters for localized carbon nanotube growth,” Proceedings of the 8th IEEE Conference on Nanotechnology (NANO), 452 (2008).

  23. Y. Choi, J. L. Johnson, and A. Ural, “GaN and Ga2O3 nanowire and nanoribbon growth from ion implanted Fe catalyst,” presented at the Materials Research Society (MRS) Spring Meeting, San Francisco, CA (2008).

  24. A. Behnam, J. L. Johnson, Y. Choi, L. Noriega, M. G. Ertosun, Z. Wu, A. G. Rinzler, P. Kapur, K. C. Saraswat, and A. Ural, “Metal-Semiconductor-Metal (MSM) photodetectors with single-walled carbon nanotube film Schottky electrodes on GaAs,” presented at the American Physical Society (APS) March Meeting, New Orleans, LA (2008).

  25. J. Hicks, A. Behnam, and A. Ural, “Monte Carlo simulations of the effect of nanotube length distribution on the percolation resistivity in single-walled carbon nanotube films,” presented at the American Physical Society (APS) March Meeting, New Orleans, LA (2008).

  26. A. Behnam, J. L. Johnson, Y. Choi, M. G. Ertosun, Z. Wu, A. G. Rinzler, P. Kapur, K. C. Saraswat, and A. Ural, “Metal-Semiconductor-Metal (MSM) photodetectors based on single-walled carbon nanotube film-Silicon Schottky contacts,” Proceedings of SPIE 6885, 68850A (2008).

  27. J. Johnson, A. Behnam, Y. Choi, L. Noriega, G. Ertosun, Z. Wu, A. G. Rinzler, P. Kapur, K. C. Saraswat, and A. Ural, "Metal-Semiconductor-Metal (MSM) photodetectors based on single-walled carbon nanotube film-GaAs Schottky contacts,” Materials Research Society Proceedings 1057E, 1057-II22-05 (2008).

  28. A. Ural, A. Behnam, J. Johnson, and Y. Choi, “Percolation transport in single-walled carbon nanotube films: Experiment and Simulation,” Proceedings of SPIE 6769, 67690B (2007). (invited talk)

  29. A. Behnam and A. Ural, “Electrical characterization and modeling of geometry-dependent resistivity scaling in single-walled carbon nanotube films,” presented at the Materials Research Society (MRS) Spring Meeting, San Francisco, CA (2007).

  30. A. Behnam and A. Ural, “Geometry-dependent resistivity scaling in single-walled carbon nanotube films,” presented at the American Physical Society (APS) March Meeting, Denver, CO (2007).

  31. Y. Choi and A. Ural, “Micromachined silicon grids for direct TEM and Raman characterization of CVD grown carbon nanotubes,” Proceedings of SPIE, 6464, 64640A (2007).

  32. Y. Choi, J. Johnson, R. Moreau, E. Perozziello, and A. Ural, “Micromachined silicon grids for direct TEM characterization of carbon nanotubes grown by CVD,” Materials Research Society Proceedings 963E, 0963-Q20-13 (2007).

  33. A. Behnam, L. Noriega, Y. Choi, Z. Wu, A. G. Rinzler, and A. Ural, “Geometry dependent resistivity in single-walled carbon nanotube films patterned down to submicron dimensions,” Materials Research Society Proceedings 963E, 0963-Q10-55 (2007).

  34. A. Ural, “Electrical properties of single-walled nanotube films,” Proceedings of SPIE 6370, 63700F (2006). (invited talk)

  35. Y. Choi, J. Sippel-Oakley, A. G. Rinzler, and A. Ural, “Carbon nanotube growth from nanoscale clusters formed by ion implantation,” Materials Research Society Proceedings 908E, 0908-OO15-03 (2006).

  36. Y. Choi, J. Sippel-Oakley, A. G. Rinzler, and A. Ural, “Carbon nanotube growth from ion-implanted catalyst by chemical vapor deposition” Proceedings of SPIE 6008, 600805 (2005).

  37. A. Ural, “Electric field assisted growth and assembly of carbon nanotubes for nanoelectronics and nanosensing applications,” Proceedings of SPIE 5593, 28 (2004). (invited talk)

  38. A. Nojeh, A. Ural, R. F. Pease, and H. Dai, "Electric-field-directed growth of carbon nanotubes in two dimensions," presented at the 48th International Conference on Electron, Ion, and Photon Beam Technology and Nanofabrication (EIPBN 2004), San Diego, CA (2004).

  39. A. Javey, H. Kim, M. Brink, Q. Wang, A. Ural, J. Guo, P. McIntyre, P. McEuen, M. Lundstrom, and H. Dai, "High k dielectrics for advanced carbon nanotube transistors and logic," presented at the American Physical Society (APS) March Meeting, Austin, TX (2003).

  40. A. Ural, S. Koh, P. B. Griffin, and J. D. Plummer, “Coupled diffusion of dopants,” presented at TECHCON 2000, Phoenix, AZ (2000).

  41. A. Ural, S. Koh, P. B. Griffin, and J. D. Plummer, “What does self-diffusion tell us about ultra shallow junctions?” Materials Research Society Proceedings 610, B4.11 (2000).

  42. A. Ural, P. B. Griffin, and J. D. Plummer, “Nonequilibrium experiments on self-diffusion in silicon at low temperatures using isotopically enriched structures,” presented at the 20th International Conference on Defects in Semiconductors (ICDS- 20), Berkeley, CA (1999).

  43. A. Ural, P. B. Griffin, and J. D. Plummer, “Experimental study of self-diffusion in silicon using isotopically enriched structures,” Materials Research Society Proceedings 568, 97 (1999).

  44. P. B. Griffin and A. Ural, “Interactions between silicon self-diffusion and dopant diffusion,” presented at the Electrochemical Society Meeting, Seattle, WA (1999). (invited talk)

  45. S. K. Theiss, M.-J. Caturla, T. Diaz de la Rubia, M. C. Johnson, A. Ural, and P. B. Griffin, “Linking ab initio energetics to experiment: Kinetic Monte Carlo simulation of transient enhanced diffu­sion of B in Si,” Materials Research Society Proceedings 538, 291 (1998).