Publications


† denotes a graduate student directly supervised by Nelson Sepúlveda and ‡ denotes an undergraduate student directly supervised by Nelson Sepúlveda

Journal Publications

     

    2023

  1. C. Chen, H. Shi, I. González-Afanador, N. Sepúlveda and X. Tan, "Rapid Fabrication of Flexible Pressure Sensor Array," IEEE Sensors Letters, vol. 7, no. 6, pp. 1-4, June 2023.
  2. G.L. Morales-Torres, I. González-Afanador, B.M. Dávila-Montero, J. Pastrana, H. Dsouza, and N. Sepúlveda "Wireless, flexible, self-powered sensor to analyze head impact kinematics". Nano Energy Journal, 108835, (2023), [site][.pdf].
  3. H. Dsouza, B.M. Dávila-Montero, I. González-Afanador, G.L. Morales-Torres, Y. Cao, R. Mejia-Alvarez, and N. Sepúlveda "Measuring vibrations on a biofidelic brain using ferroelectret nanogenerator". Scientific Reports, 8975, (2023), [site][.pdf].
  4. W. Li, Y. Cao, C. Wang, and N. Sepúlveda "Ferroelectret nanogenerators for the development of bioengineering systems". Cell Reports Physical Science Journal, vol.4 no.5, 101388 (2023), [site][.pdf].
  5. Y. Cao, Y. Zhou, S. Fan, H. Chi, N. Sepúlveda, D. Hou, H. Zhang "A Novel Vanadium Dioxide-Based Dual-Heater Microfluidic Thermal Flow Sensor with Record High Sensitivity". IEEE Sensors Journal, (2023), [site][.pdf].
  6. H. Shi, Y. Mei, I. González-Afanador, C. Chen, S. Miehls, C. Holbrook, N. Sepúlveda, and X. Tan "Automated Soft Pressure Sensor Array-based Sea Lamprey Detection Using Machine Learning". IEEE Sensors Journal, (2023), [site][.pdf].
  7. J. Pastrana, D. Torres, L. Starman, J. Figueroa, H. Hall, N. Sepúlveda "Frequency Tuning of In-plane Comb Drive MEMS Resonators due to VO2 Phase Transition" IEEE JMEMS, (2023), [site][.pdf].
  8. W. Li, Y. Cao, N. Sepúlveda "Thin Film Piezoelectric Nanogenerator Based on (100)-Oriented Nanocrystalline AlN Grown by Pulsed Laser Deposition at Room Temperature". Micromachines, (2023), 14(1), 99; [site][.pdf].
  9. Cao Y, Wang T, N. Sepúlveda "Microfluidic Thermal Flow Sensor Based on PhaseChange Material with Ultra-High Thermal Sensitivity". Journal of Materials Chemistry C (JMCC), (2023), DOI https://doi.org/10.1039/D2TC04047F, [site][.pdf].

     

    2022

  10. Q. Abdullahi, A. Dzipalski, C. Raguenes, N. Sepúlveda, G. Jose, A. Shanim, G. Goussetis, D. Anagnostou"Use of Thermochromic Properties of VO2 for Reconfigurable Frequency Selection". Electronics, (2022), 11(24), 4099; [site][.pdf].
  11. Cao Y, Shi H, Tan X, N. Sepúlveda "Nanogenerator-Based Bidirectional Pressure Sensor Array and Its Demonstration in Underwater Invasive Species Detection". Nano Research, (2022), https://doi.org/10.1007/s12274-022-5195-4; [site][.pdf].
  12. H. Dsouza, J. Pastrana, J. Figueroa, I. González-Afanador, B.M. Davila-Montero, N. Sepúlveda, "Flexible, self-powered sensors for estimating human head kinematics relevant to concussions", Scientific Reports , (2022). [site][.pdf].
  13. Y. Cao, H. Shi, X. Tan, N. Sepúlveda, "Enabling Negative Pressure Sensing Through Ferroelectret Device", IEEE Sensors Journal , (2022). [site].
  14. H. Shi, I. González-Afanador, C. Holbrook, N. Sepúlveda, X. Tan, "Soft Pressure Sensor for Underwater Sea Lamprey Detection", IEEE Sensors Journal , (2022). [site][.pdf].
  15. T.-H. Liu, X. Han, J. Pastrana, N. Sepúlveda, J. Wang, "Piezoelectric Lateral-Extensional Mode Resonators with Reconfigurable Electrode and Resonance Mode-Switching Behavior Enabled by a VO2 Thin-Film", IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control , (2022). [site][.pdf].

    16.  

    2021

  16. I. González-Afanador, H. Shi, H. Holbrook, X.Tan, and N. Sepúlveda, "Invasive Sea Lamprey Detection and Characterization Using Interdigitated Electrode (IDE) Contact Sensor", IEEE Sensors Journal, 21(24), pp. 27947-27956, (2021). [site][.pdf].
  17. H. Wan, J. Zhao, L.-W. Lo, Y. Cao, N. Sepúlveda, and C. Wang, "Multimodal Artificial Neurological Sensory–Memory System Based on Flexible Carbon Nanotube Synaptic Transistor", ACS Nano, 15(9), pp. 14587-14597, (2021). [site][.pdf].
  18. J. Figueroa, H.Dsouza, J. Pastrana, D. Torres, H. Hall, K. Leedy, and N. Sepúlveda, "VO2-based micro-electro-mechanical tunable optical shutter and modulator", Optics Express, 29(16), pp. 25242-25253, (2021). [site][.pdf].
  19. H. Shi, C. M. Holbrook, Y. Cao, N. Sepúlveda,, Xiaobo Tan, "Measurement of suction pressure dynamics of sea lampreys, Petromyzon marinus", PLoS One, 16(4): e0247884, (2021). [site][.pdf].
  20. C. Murphy, Y. Cao, N. Sepúlveda, and W. Li, "Quick self-assembly of bio-inspired multi-dimensional well-ordered structures induced by ultrasonic wave energy", PLoS One, 16(2): e0246453, (2021). [site][.pdf].

     

    2020

  21. H. Wan, Y. Cao, L.-W. Lo, N. Sepúlveda, and C. Wang, "Flexible Carbon Nanotube Synaptic Transistor for Neurological Electronic Skin Applications", ACS Nano, 14, 8 pp. 10402-10412 [site][.pdf].
  22. J.J. Pastrana†, H. Dsouza†, Y. Cao, J. Figueroa†, I. Gonzalez-Afanador†, J.J. Vilatela, and N. Sepúlveda, "Electrode Effects on Flexible and Robust Polypropylene Ferroelectret Devices for Fully Integrated Energy Harvesters", ACS Applied Materials& Interfaces, 12 (20), pp. 22815-22824 (2020) [site][.pdf].
  23. Y. Cao†, D. Hernandez-Escobar, C. Boehlert, and and N. Sepúlveda,"Actuation Dependency of Frequency Tuning in MEMS Resonators",IEEE/ASME Journal of Microelectromechanical Systems, Vol. 29, Iss. 2, pp. 132-134, 2020. [site][.pdf].
  24. D. Anagnostou, D. Torres†, T. Teeslink, and N. Sepúlveda, "Vanadium Dioxide for Reconfigurable Antennas and Microwave Devices: Enabling RF Reconfigurability Through Smart Materials", IEEE Antennas and Propagation Magazine, 62, 3, pp. 58-73 (2020). [site][.pdf]
  25. H. Dsouza†, A. Van Schyndel, J.J. Pastrana†, Y. Cao†, E. Hunter, B. Rakerd, and N. Sepúlveda, "Ferroelectret Nanogenerators for Loudspeaker Applications: A Comprehensive Study", Journal of Sound and Vibration, 468, 115091 2020. [site][.pdf]

     

    2019

  26. Y. Cao† and N. Sepúlveda, "Design of flexible piezoelectric gyroscope for structural health monitoring", Applied Physics Letters, 115, 241901, (2019). [site][.pdf]
  27. H. Wan, Y. Cao†, Li-Wei Lo, Zhihao Xu, N. Sepúlveda, and Chuan Wang, "Screen-Printed Soft Triboelectric Nanogenerator with Porous PDMS and Stretchable Electrode", Journal of Semiconductors, Vol. 40, Iss. 11, 112601, 2019. [site][.pdf]
  28. Y. Cao† and N. Sepúlveda, "Interface stress for bidirectional frequency tuning of prebuckled vanadium dioxide MEMS resonators", Advanced Materials Interfaces, 1900887,(2019). [site][.pdf]
  29. Y. Cao†, W. Li, and N. Sepúlveda, "Performance of Self-Powered, Water-Resistant Bending Sensor Using Transverse Piezoelectric Effect of Polypropylene Ferroelectret Polymer", IEEE Sensors Journal, Vol. 19 , Iss. 22, pp. 10327 - 10335, (2019). [site][.pdf]
  30. Y. Cao†, J. Figueroa†, J. Pastrana†, W. Li, Z. Chen, ZL Wang, and N. Sepúlveda, "Flexible Ferroelectret Polymer for Self-Powering Devices and Energy Storage Systems", ACS Applied Materials & Interfaces, 11, 9, pp.17400-17409, (2019). [site][.pdf]
  31. Y. Cao†, J. Figueroa†, W. Li, Z. Chen, ZL Wang, and N. Sepúlveda, "Understanding the dynamic response in ferroelectret nanogenerators to enable self-powered tactile systems and human-controlled micro-robots", Nano Energy, 63, 103852, (2019). [site][.pdf]
  32. J. Figueroa†, Y. Cao†, H. Dsouza†, J. Pastrana†, and N. Sepúlveda, "A Simplified Approach for Obtaining Optical Properties of VO2 Thin Films, and Demonstration of Infrared Shape‐Shifting Devices", Advanced Materials Technologies, 1800599, (2019). [site][.pdf]

     

    2018

  33. D. Torres†, J. Zhang, S. Dooley, X. Tan, and N. Sepúlveda, "Hysteresis-Based Mechanical State Programming of MEMS Mirrors", IEEE/ASME Journal of Microelectromechanical Systems, 27(2), 344-354, (2018). [site][.pdf]
  34. J. Figueroa†, Y. Cao†, T. Wang†,D. Torres†, and N. Sepúlveda, "Programming emissivity on fully integrated VO2 windows", Advanced Materials Letters, 9(6), pp. 406-410, (2018). [site][.pdf]
  35. Y. Cao†, W. Li†, J. Figueroa†, T. Wang†,D. Torres†, C. Wang, Z.L. Wang, and N. Sepúlveda, "Impact-activated Programming of Electro-Mechanical Resonators Through Ferroelectret NanoGenerator (FENG) and Vanadium Dioxide", Nano Energy, 43, pp. 278-284, (2018). [site][.pdf]

     

    2017

  36. Y. Cao†, D. Torres†, T. Wang†, X. Tan and N. Sepúlveda, "Enabling Tunable Micromechanical Bandpass Filters Through Phase-change Materials", Smart Materials and Structures, 26, 8, pp. 085032, (2017).[site][.pdf]
  37. S. Zhang, L. Cai, W. Li†, J. Miao, T. Wang†, J. Yeom, N. Sepúlveda, and C. Wang "Fully-Printed Silver Nanoparticle Based Strain Gauges with Record High Sensitivity", Advanced Electronic Materials, 1700067, (2017). [site][.pdf]
  38. W. Li†, D. Torres†, R. Díaz†, Z. Wang, C. Wu, C. Wang, Z.L. Wang, and N. Sepúlveda, "Nanogenerator-based dual-functional and self-powered loudspeaker/microphone thin patch for flexible electronics", Nature Communications, 8, 15310, (2017). [site][.pdf]
  39. D. Torres†, J. Zhang, S. Dooley, X. Tan, and N. Sepúlveda, "Modeling of MEMS mirrors actuated by phase-change mechanism", Micromachines, 8, 138. (2017). [site][.pdf]
  40. T. Wang†, D. Torres†, C. Wang, F.E. Fernández,, and N. Sepúlveda, "Maximizing the performance of photothermal actuators by combining smart materials with supplementary advantages" Science Advances, Vol.3, No.4 (2017).[site][.pdf]
  41. S. Zhang, L. Cai, T. Wang †, J. Miao, N. Sepúlveda, and C. Wang "Fully printed flexible carbon nanotube photodetectors", Applied Physics Letters, vol.110, 123105, (2017). [site][.pdf]

     

    2016

  42. Z. Tao , F. Zhou , T.-R. T. Han , D. Torres†, T. Wang †, N. Sepúlveda, K. Chang , M. Young, R. R. Lunt, C.-Y. Ruan, "The nature of photoinduced transition and metastable states in vanadium dioxide", 6, No. 38514, Scientific Reports, (2016). [site][.pdf]
  43. W. Li, D. Torres, T. Wang, C. Wang, and, N. Sepúlveda, "Flexible and biocompatible polypropylene ferroelectret nanogenerator (FENG): on the path toward wearable devices powered by human motion", Nano Energy, 30, 649-657, (2016). [site][.pdf]
  44. M.R.M. Hashemi, S.-H. Yang, T. Wang †, N. Sepúlveda, and M. Jarrahi, "Electronically-Controlled Beam-Steering through Vanadium Dioxide Metasurfaces", Scientific Reports, vol. 6, No. 35439 (2016). [site][.pdf]
  45. D. Torres†, T. Wang †, J. Zhang, X. Zhang, S. Dooley, X. Tan, H. Xie, and N. Sepúlveda, "VO2-based MEMS mirrors", IEEE/ASME Journal of Microelectromechanical Systems, vol.25, No.4, pp.780 - 787, (2016). [site][.pdf]
  46. J. Zhang, D. Torres†, N. Sepúlveda, and X. Tan, "A compressive sensing-based approach for Preisach hysteresis model identification", Smart Materials and Structures, vol. 25, 075008, (2016). [site][.pdf]
  47. J. Zhang, D. Torres†, J.L. Ebel, N. Sepúlveda, and X. Tan; "A Composite Hysteresis Model in Self-Sensing Feedback Control of Fully Integrated VO2 Microactuators", IEEE Transactions on Mechatronics, vol. 21, No. 5, (2016). [site][.pdf]

     

    2015

  48. S. Zhang, L. Cai, T. Wang†, R. Si, J. Miao, L. Wei, Y. Chen, N. Sepúlveda, and C. Wang, "Bolometric-Effect-Based Wavelength-Selective Photodetectors Using Sorted Single Chirality Carbon Nanotubes", Scientific Reports 5, No.17883 (2015). [site][.pdf]
  49. Z. Wu, T. Knighton, V. Tarquini, D. Torres†, T. Wang, N. Sepúlveda, and J. Huang, "Polycrystalline VO2 film characterization by quantum capacitance measurement" Appl. Phys. Lett. 107, 104101 (2015). [site][.pdf]
  50. S. Lysenko, F.E. Fernández, A. Rua, J. Aparicio, N. Sepúlveda, J. Figueroa, K. Vargas, and J. Cordero; "Light scattering by epitaxial VO2 films near the metal-insulator transition point", Journal of Applied Physics, 117, 184304 (2015). [site][.pdf]
  51. T. S. Teeslink, D. Torres†, J.L. Ebel, N. Sepúlveda, and D.E. Anagnostou, "Reconfigurable Antennas using Metal-Insulator Transition in Vanadium Dioxide", IEEE Antenna Wireless and Propagation Letters, vol.14, pp. 1381-1384 (2015). [site][.pdf]
  52. T. Wang†, D. Torres†, F.E. Fernández, A. Green, C. Wang and N. Sepúlveda, "Increasing Efficiency, Speed, and Responsivity of Vanadium Dioxide Based Photo-thermally Driven Actuators Using Single-wall Carbon Nanotube Thin-Films", ACS Nano, 9 (4), pp. 4371-4378 (2015). [site][.pdf]
  53. J. Zhang, E. Merced†, N. Sepúlveda, and X. Tan, "Optimal compression of generalized Prandtl-Ishlinskii hysteresis models", Automatica vol.57 pp. 170-179, (2015). [site][.pdf]
  54. S. Lysenko, F.E. Fernández, A. Rua, N. Sepúlveda, J. Aparicio, "Photoinduced insulator-to-metal transition and surface statistics of VO2 monitored by elastic light scattering", Applied Optics, vol. 54, No. 8, pp. 2141-2150, (2015). [site][.pdf]
  55. E. Merced†, D. Torres†, X. Tan, and N. Sepúlveda; "An Electro-thermally Actuated VO2-based MEMS Using Self-sensing Feedback Control"; IEEE/ASME Journal of Microelectromechanical Systems, vol.24, No.1, pp.100-107, (2015). [site][.pdf]

     

    2014

  56. J. Zhang, E. Merced†, N. Sepúlveda, and X. Tan, "Modeling and inverse compensation of hysteresis in vanadium dioxide using an extended generalized Prandtl-Ishlinskii model", Smart Materials and Structures, 23, 125017 (2014). [site][.pdf]
  57. E. Merced†, X. Tan, and N. Sepúlveda, "Closed-loop Tracking of Large Displacements in Electro-thermally Actuated VO2-based MEMS"; IEEE/ASME Journal of Microelectromechanical Systems,vol.23, No.5, pp.1073-1083, (2014). [site][.pdf]
  58. N. Dávila†, E. Merced†, and N. Sepúlveda, "Electronically variable optical attenuator enabled by self-sensing in vanadium dioxide";IEEE Photonics Technology Letters, 26, 10, pp.1011-1014, (2014). [site][.pdf]
  59. M. R. Hashemi, C.W. Berry, E. Merced†, N. Sepúlveda, and M. Jarrahi, "Direct Measurement of Vanadium Dioxide Dielectric Properties in W-band"; Journal of Infrared, Millimeter, and Terahertz Waves 35, 486-492, (2014). [site][.pdf]
  60. D.E. Anagnostou, M.T. Chryssomallis, B. D. Braaten, J.L. Ebel, and N. Sepúlveda, "Reconfigurable UWB Antenna With RF-MEMS for On-Demand WLAN Rejection "; IEEE Transactions on Antennas and Propagation, Vol. 62, No. 2, pp.602-608 (2014). [site][.pdf]
  61. R. Cabrera, E. Merced†, and N. Sepúlveda, "Performance of Electro-Thermally Driven VO2-based MEMS Actuators", IEEE/ASME Journal of Microelectromechanical Systems, vol.23, No.1, pp.243-251, (2014).[site][.pdf]
  62. J. Zhang, E. Merced†, N. Sepúlveda, and X. Tan, "Modeling and Inverse Compensation of Non-monotonic Hysteresis in VO2-coated Microactuators" vol.19, No.2, pp. 579-588, IEEE Transactions on Mechatronics (2014). [site][.pdf]
  63. E. Merced†, J. Zhang, X. Tan, and N. Sepúlveda, "Robust Control of VO2-coated Micro-benders Using Self-sensing Feedback", IEEE Transactions on Mechatronics, vol.19, No.5, pp. 1583-1592, (2014).[site][.pdf]

     

    2013

  64. R. Cabrera†, E. Merced†, and N. Sepúlveda, "A Micro-Electro-Mechanical Memory based on the Structural Phase Transition of VO2"; Phys. Status Solidi A, 210: 1704-1711, (2013). HIGHLIGHTED IN MAGAZINE'S FRONT COVER. [site][.pdf]
  65. E. Merced†, X. Tan, and N. Sepúlveda, "Strain energy density of VO2-based microactuators", Sensors and Actuators A: Physical, 196, pp.30-37, (2013). [site][.pdf]

    66.  

    2012

  66. N. Dávila†, R. Cabrera†, and N. Sepúlveda, "Programming and projection of near IR Images using VO2 films", IEEE Photonics Technology Letters, 24, 20, pp.1830-1833 (2012). [site][.pdf]
  67. E. Merced†, N. Dávila†, D. Torres‡, R. Cabrera†, F. E. Fernández, and N. Sepúlveda, "Photothermal actuation of VO2:Cr-coated micro-cantilevers in air and aqueous media" Smart Mater. and Struct., 21, 105009, (2012). [site][.pdf]
  68. A. Rúa, R. Cabrera†, H. Coy, E. Merced†, N. Sepúlveda, and F.E. Fernández, "Phase transition behavior in microcantilevers coated with M1-phase VO2 and M2-phase VO2:Cr thin films", Journal of Applied Physics, 111, 104502, (2012). [site][.pdf]
  69. E. Merced†, R. Cabrera†, N. Dávila†, F.E. Fernández, N. Sepúlveda, "A micro-mechanical resonator with programmable frequency capability", Smart Mater. Struct., 21, 035007 (2012). [site][.pdf]

    70.  

    Earlier

  70. R. Cabrera†, E. Merced†, F.E. Fernández, N. Sepúlveda, "Dynamics of photothermally-driven VO2-coated microcantilevers", Journal of Applied Physics, 110, 094510, 2011. [site][.pdf]
  71. R. Cabrera†, E. Merced†, N. Dávila†, F.E. Fernández, N. Sepúlveda, "A Multiple-State Micro-Mechanical Programmable Memory", Journal of Microelectron. Eng., Vol. 88, No. 11, pp. 3231-3234; November 2011. [site][.pdf] Article Featured in Advances in Engineering.
  72. E. Merced†, H. Coy†, R. Cabrera†, F.E. Fernández, N. Sepúlveda, "Frequency tuning of VO2-coated Buckled Microbridges" IEEE/ASME Journal of Microelectromechanical Systems (JMEMS), Vol. 20, No. 3, pp. 558-560, June 2011. [site][.pdf]
  73. H. Coy†, R. Cabrera‡, N. Sepúlveda, and F.E. Fernández, "Opto-electronic and full-optical multiple state memory response in phase-change materials", Journal of Applied Physics, 108, 113115 (2010). [site][.pdf]
  74. A. Rúa‡, F.E. Fernández, and N. Sepúlveda, "Bending in VO2-coated microcantilevers suitable for thermally activated actuators" Journal of Applied Physics, 107, 074506, (2010). [site][.pdf]
  75. N. Sepúlveda, A. Rúa‡, F.E. Fernandez, "Resonant frequency behavior of silicon cantilevers coated with nanostructured and microcrystalline VO2 films", IEEE Transactions on Nanotechnology (TNANO), Vol. 9, No. 3, (2010). [site] [.pdf]
  76. A. Rúa‡, F.E. Fernández, M.A. Hines, and N. Sepúlveda, "Study of the resonant frequencies of silicon microcantilevers coated with vanadium dioxide films during the insulator-to-metal transition" Journal of Applied Physics, 107, 053528, (2010). [site][.pdf]
  77. A. Rua‡, F.E. Fernández, R. Cabrera‡ and N. Sepúlveda, "Young's modulus of pulsed-laser deposited V6O13 thin films" Journal of Applied Physics 105, 113504 (2009). [site][.pdf]
  78. N. Sepúlveda, A. Rua‡, R. Cabrera‡, F.E. Fernández, "Young's modulus of VO2 thin films as a function of temperature including insulator-to-metal transition regime" Applied Physics Letters 92, 191913 (2008). [site][.pdf]
  79. N. Sepúlveda, J. Lu, Dean M. Aslam, and J. P. Sullivan, "High Performance Polycrystalline Diamond Micro and Nano Resonators" IEEE/ASME Journal of MicroElectroMechanicalSystems (JMEMS). Vol. 17 Issue 2. April (2008) pp.473-482. [site][.pdf]
  80. N. Sepúlveda, D.M. Aslam, J.P. Sullivan, "Polycrystalline Diamond MEMS Resonator Technology for Sensor Applications" Diamond and Related Materials, Vol. 15, Issues 2-3, February-March (2006), Pages 398-403. [site] [.pdf]
  81. N. Sepúlveda-Alancastro and D. M. Aslam, "Polycrystalline diamond technology for RF MEMS Resonators" Journal of Microelectron. Eng. 73-74, 435 (2004). [site][.pdf]

Conference Proceedings

     

    2017

    2016

  1. Z. Wu, T. Knighton, V. Tarquini, D. Torres, T. Wang, N. Sepúlveda, and J. Huang, "Quantum capacitance in thin film vanadium dioxide metal insulator transition", APS Meeting Abstracts, F30.013, (2016).
  2. M.R. Hashemi, S.-H. Yang, T. Wang†, N. Sepúlveda, M. Jarrahi, "Fully-integrated and electronically-controlled millimeter-wave beam-scanning" Microwave Symposium (IMS), 2016 IEEE MTT-S International, pp. 1-3 (2016).
  3. D. Torres, T. Wang, J. Zhang, S. Dolley, X. Tan, and N. Sepúlveda," Experimental Characterization of the Dynamics of VO2-Based MEMS Mirrors" ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, pp. V001T02A005-V001T02A005 (2016).
  4. Y. Cao, D. Torres, T. Wang, N. Sepúlveda," Influence of VO2 Thin Film Coatings on the Performance of Integrated MEMS Bridges and Cantilevers" ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, pp. V001T02A010-V001T02A010 (2016).
  5. M.R. Hashemi, S.-H. Yang, T. Wang†, N. Sepúlveda, M. Jarrahi, "Reconfigurable meta-surface for millimeter-wave beam-scanning" Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2016 41st International Conference on, pp. 1-2 (2016).
  6. D.E. Anagnostou, T.S. Teeslink, D. Torres, N. Sepúlveda, "Vanadium dioxide reconfigurable slot antenna" Antennas and Propagation & USNC/URSI National Radio Science Meeting, IEEE International Symposium on, Fajardo, PR (USA), pp. 1055-1056 (2016).

     

    2015

  7. M.R. Hashemi, S.-H. Yang, T. Wang†, N. Sepúlveda, M. Jarrahi, "Fully-integrated and electronically-controlled millimeter-wave phase modulator" 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015, Hong Kong, pp. 1-2 (2015).
  8. M.R. Hashemi, S.-H. Yang, T. Wang†, N. Sepúlveda, M. Jarrahi, "Millimeter-Wave Phase Modulator Based on Vanadium Dioxide Meta-Surfaces" Antennas and Propagation & USNC/URSI National Radio Science Meeting, IEEE International Symposium on, Vancouver, BC, pp. 77-78 (2015).
  9. M.R. Hashemi, S.-H. Yang, T. Wang†, N. Sepúlveda, M. Jarrahi, "Efficient Terahertz Phase Modulation Using Vanadium Dioxide Meta-Surfaces", Conference on Lasers and Electro-Optics (CLEO), Optical Society of America, pp.STu1H.4, (2015).
  10. Z. Wu, T. Knighton, V. Tarquini, J. Huang, N. Sepúlveda, "Measurement of the quantum capacitance of two-dimensional vanadium dioxide films", APS Meeting Abstracts, pp.13010, (2015).
  11. T. Teeslink, D. Torres†, M. Chryssomalis, N. Sepulveda, and D.E. Anagnostou, "Reconfigurable Antenna Prototype Utilizing the Phase Change Characteristics of Vanadium Dioxide", Antennas and Propagation & USNC/URSI National Radio Science Meeting, IEEE International Symposium on, Vancouver, BC, 2015, pp. 2285-2286 (2015).
  12. Z. Tao, T.-R.T Han, F. Zhou, D. Torres†, T. Wang†, N. Sepulveda, C.-Y. Ruan,"Beyond structural bottleneck: the nature of nonthermal optically induced ultrafast phase switching in VO2" Bulletin of the American Physical Society APS March Meeting 2015, Volume 60, Number 2, (2015).
  13. J. Zhang, D. Torres†, N. Sepúlveda, X. Tan, "Compressive sensing-based Preisach hysteresis model identification" [Invited], Proceedings of the 2015 American Control Conference, Chicago, IL, USA, pp.2637-2642, (2015)

     

    2014

  14. T. Wang†, D. Torres†, C. Wang, and N. Sepúlveda, "Increasing Photo-Thermal Efficiency of VO2-Based Devices Using Carbon Nanotube Thin Films" IEEE Sensors, Valencia, Spain, pp. 386 - 389, (2014).
  15. J. Zhang, D. Torres†, E. Merced, N. Sepúlveda, and X. Tan "A Hysteresis-Compensated Self-Sensing Scheme for Vanadium Dioxide-Coated Microactuators” ASME 2014 Dynamic Systems and Control Conference, San Antonio, TX, Paper No. DSCC2014-6222 (doi:10.1115/DSCC2014-6222), (2014).
  16. Z. Tao, T.R.T. Han, F. Zhou, S.D. Mahanti, P.M. Duxbury, C.-Y. Ruan, D. Torres†, and N. Sepúlveda, "Evidences of nonthermal optically induced insulator-to-metal switching in VO2" Bulletin of the American Physical Society APS March Meeting 2014, Volume 59, Number 1, (2014).
  17. J. Zhang, E. Merced†, N. Sepúlveda, X. Tan, "Inversion of a modified generalized Prandtl-Ishlinskii hysteresis model: Theory and experimental results", Proceedings of the 2014 American Control Conference, Portland, OR, pp. 4765 - 4770 , (2014).

    18.  

    2013

  18. J. Zhang, E. Merced†, N. Sepúlveda, X. Tan, "Optimal Compression of a Generalized Prandtl-Ishlinskii Operator in Hysteresis Modeling," 2013 ASME Dynamic Systems and Control Conference, Palo Alto, CA, pp. PP-PP, (2013) [Best Conference Paper in Applications Award]
  19. J. Zhang, E. Merced†, N. Sepúlveda, and X. Tan, "Kullback-Leibler divergence-based optimal compression of Preisach operator in hysteresis modeling", Proceedings of the 2013 American Control Conference, Washington, DC, pp. 89-94, (2013).
  20. E. Merced†, J. Zhang, X. Tan, and N. Sepúlveda, "Robust control of VO2-coated microactuators based on self-sensing feedback," Proceedings of 2013 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, Wollongong, Australia, pp. 656-661, (2013) [Finalist for Best Conference Paper Award]

    21.  

    2012

  21. E. Merced†, N. Dávila†, D. Torres‡, F.E. Fernández, and N. Sepúlveda, "Dynamics of VO2:Cr coated microcantilevers in aqueous media," Nanotechnology Materials and Devices Conference (NMDC), 2012 IEEE , vol., no., pp.100,104, 16-19 Oct. (2012)
  22. C. Ramsey‡, R. Cabrera†, E. Merced†, and N. Sepúlveda, "VO2 thin films for micromanipulators," Nanotechnology Materials and Devices Conference (NMDC), 2012 IEEE , vol., no., pp.120,123, 16-19 Oct. (2012)
  23. N. Dávila†, R. Cabrera†, and N. Sepúlveda, "Programming optical states in VO2 film for IR phototherapy," Nanotechnology Materials and Devices Conference (NMDC), 2012 IEEE , vol., no., pp.71,74, 16-19 Oct. (2012)
  24. E. Merced, J. Zhang, X. Tan, N. Sepulveda, "Experimental characterization of work per volume density of VO2-based MEMS actuators," Proceedings of ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Stone Mountain, GA, Paper SMASIS2012-7919, (2012)
  25. J. Zhang, E. Merced, N. Sepulveda, X. Tan, "Modeling of non-monotonic hysteresis behavior in VO2-based MEMS actuators," Proceedings of ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Stone Mountain, GA, Paper SMASIS2012-7940, (2012). [Student Best Paper Competition Award]

    26.  

    2011

  26. E. Merced†, R. Cabrera†, N. Dávila;†, F. E. Fernández, and N. Sepúlveda, " Characterization of VO2-coated SiO2 micromechanical bridges heated by light radiation", ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1, (2011).
  27. E. Merced†, R. Cabrera†, N. Dávila†, F. E. Fernández, and N. Sepúlveda, " Drastic and Fast Changes in Stress/Strain of Photothermally Actuated VO2-coated Microcantilevers", ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1, (2011).
  28. R. Cabrera†, E. Merced†, N. Dávila†, F. E. Fernández, and N. Sepúlveda, " Multifunctional Micro-Mechanical Memory Devices", ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1, (2011).

    29.  

    2010

  29. E. Merced†, R. Cabrera†, R. Suárez‡, F. E. Fernández, and N. Sepúlveda, " Nanostructured VO2 film coatings for tunable MEMS resonators", IEEE Nanotechnology Materials and Devices Conference (NMDC), 2010, pp.212-215, 12-15 Oct, (2010).
  30. N. Sepúlveda, D.E. Anagnostou, M.T. Chryssomallis, J.L. Ebel, "Integration of RF-MEMS switches with a band-reject reconfigurable ultra-wideband antenna on SiO2 substrate," Antennas and Propagation Society International Symposium (APSURSI), 2010 IEEE , pp.1-4, 11-17 July 2010.

    31.  

    Earlier

  31. J. Lu Z. Cao, D.M. Aslam, N. Sepúlveda, and J.P. Sullivan, Diamond micro and nano resonators using laser, capacitive or piezoresistive detection, 3rd Annual International Conference on Nano/Micro Engineered and Molecular Systems, 6-9 Jan., (2008) pp 873-876.
  32. N. Sepúlveda, D.M. Aslam, J.P. Sullivan, "Polycrystalline diamond RF MEMS resonators with the highest quality factors" 19th IEEE International conference on MEMS Jan. (2006), 238-241.
  33. N. Sepúlveda, D.M. Aslam, J.P. Sullivan, J.R. Wendt and B.B. McKenzie, "Polycrystalline Diamond Micromechanical Resonators with Submicrometer and Nanometer Dimensions" 1st Annual International Conference on Nano/Micro Engineered and Molecular Systems, 18-21 Jan., (2006). pp 662-667.
  34. N. Sepúlveda and M. Toledo Quinones "Electrostatic and Piezoelectric Testing Methods for RF MEMS Resonators" IEEE Midwest Symposium on Circuits and Systems 2006 (MWSCAS'06) Volume 1, 6-9 Aug. (2006) Page(s):405 - 409.

Patents

  1. E. Merced†, N. Dávila†, and N. Sepúlveda, "Variable optical attenuator with integrated control based on strongly correlated materials". US Patent Number 10,216,015; Feb 26, 2019.
  2. R. Cabrera† and N. Sepúlveda, "Voltage-controlled resistor based on phase transition materials", US Patent Number 10,217,549; Feb 26th, 2019.
  3. F. E. Fernández, N. Sepúlveda, A. Rua†, R. Cabrera‡, Microactuators based on insulator-to-metal transition materials and method of using the same, Patent No. US 8,835,861; Sept. 16th 2014.
  4. F. E. Fernández, N. Sepúlveda, A. Rua†, R. Cabrera†, Bimorph Cantilever Arrangement and Applications Thereof, Patent No. US 8,440,973; May 14th 2013.
  5. F. E. Fernández, N. Sepúlveda, H. Coy†, and R. Cabrera†, "Opto-electronic and all-optical multiple-state passive memory devices using materials exhibiting insulator-to-metal transitions" currently being processed locally.