Referred Conference Publications – By Year

2016

• D. Olvera Trejo and L. F. Velásquez-García, “SLA 3-D Printed MEMS Coaxial Electrospray Sources For Uniform Generation of Core-Shell Microparticles”, Technical Digest 17^th Solid-State Sensor, Actuator and Microsystems Workshop, Hilton Head Island SC, USA, pp. 176 – 179, June 5 – 9, 2016.

2015

• A. Taylor and L. F. Velásquez-García, “Microwatt-Powered, Low-Cost, Printed Graphene Oxide Humidity Sensor For Distributed Sensor Networks”, 15^th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS 2015), Boston, Massachusetts, USA, December 1 – 4, 2015; Journal of Physics Conference Series, Vol. 660 (2015) 012134 (5pp).
• A. Hill and L. F. Velásquez-García, “Advances In Vertical Solid-State Current Limiters For Regulation Of High-Current Field Emitter Arrays”, 15^th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS 2015), Boston, Massachusetts, USA, December 1 – 4, 2015; Journal of Physics Conference Series, Vol. 660 (2015) 012037 (5pp).
• Basu, M. A. Perez, and L. F. Velásquez-García, “Miniaturized, Electrostatic, High-Vacuum Ion Pump Using A Nanostructured Field Emission Electron Source”, 15^th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS 2015), Boston, Massachusetts, USA, December 1 – 4, 2015; Journal of Physics Conference Series, Vol. 660 (2015) 012027 (5pp).
• Basu, M. A. Perez, and L. F. Velásquez-García, “Nanostructured Silicon Field Emitter Array-Based High-Vacuum Magnetic-Less Ion Pump for Miniaturized Atomic Spectroscopy Sensors”, Technical Digest of the 18^th International Conference on Solid-State Sensors, Actuators, and Microsystems (Transducers 2015), Anchorage AK, USA, pp. 1021 – 1024, June 21 – 25, 2015.
• J. Ponce de Leon, F. A. Hill, E. V. Heubel, and L. F. Velásquez-García, “High-Throughput Manufacturing of Polymer Nanofibers via Electrohydrodynamic Jetting from Planar Arrays of Microfabricated Externally-Fed Emitters”, Technical Digest of the 18^th International Conference on Solid-State Sensors, Actuators, and Microsystems (Transducers 2015), Anchorage AK, USA, pp. 1794 – 1797, June 21 – 25, 2015.

2014

• Dong, M. E. Swanwick, P. D. Keathley, F. X. Kärtner, and L. F. Velásquez-García*, “Advances on Ultrafast Silicon Field Emitter Array Photocathodes for Coherent Radiation Sources Based on Inverse Compton Scattering”, 14^th International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS 2014), Awaji Island, Hyogo, Japan, November 18 – 21, 2014; Journal of Physics Conference Series, Vol. 557 (2014) 012055 (5pp).
• H. Ye, J. S. Kienitz, S. Fang, S. Trippel, M. E. Swanwick, P. D. Keathley, L. F. Velásquez-García, G. Cirmi, G. M. Rossi, A. Fallahi, O. D. Mücke, J. Küpper, and F. X. Kärtner “Velocity Map Imaging of Electrons Strong-Field Photoemitted from Si-Nanotip Arrays”, Technical Digest 19^th International Conference on Ultrafast Phenomena, Okinawa Convention Center, 09.Wed.P3.37, July 7 – 11 2014.
• M. E. Swanwick, C. D. Dong, P. D. Keathley, A. Fallahi, F. X. Kärtner, and L. F. Velásquez-García, “Pitch Scaling of Ultrafast, Optically-Triggered Silicon Field Emitter Arrays”, Technical Digest of the 27^th International Vacuum Nanoelectronics Conference (IVNC 2014), Engelberg, Switzerland, July 6 – 10, 2014.
• A. A. Fomani, L. F. Velásquez-García, and A. I. Akinwande, “Challenges of High Vacuum Pumping based on Impact Ionization and Implantation Processes”, Technical Digest of the 27^th International Vacuum Nanoelectronics Conference (IVNC 2014), Engelberg, Switzerland, July 6 – 10, 2014.
• A. A. Fomani, M. E. Swanwick, L. F. Velásquez-García, and A. I. Akinwande “Current Limitation in Large-Area Self-Aligned Gated Field Emission Arrays”, Technical Digest of the 27^th International Vacuum Nanoelectronics Conference (IVNC 2014), Engelberg, Switzerland, July 6 – 10, 2014.
• A. Fallahi, R. Hobbs, Y. Yang, P. D. Keathley, M. E. Swanwick, L. F. Velásquez-García, K. K. Berggren, and F. X. Kärtner, “Complete Simulation of Laser Induced Field Emission from Nanostructures Using a DGTD, PIC and FEM Code”, Technical Digest 5^th International Particle Accelerator Conference, MOPRI026, pp. 645 – 648, June 15 – 20, 2014.
• P. D. Keathley, M. E. Swanwick, A. Fallahi, L. F. Velásquez-García, and F. X. Kärtner, “Space Charge Effects in Strong-Field Emission From a Nanostructured Si Cathode”, Technical Digest of the Conference on Lasers and Electro-Optics – CLEO, San Jose, CA, JW2A.112, June 8-13, 2014.
• X. Xie, Y. Zaitsev, L. F. Velásquez-García, S. Teller, and C. Livermore, “Compact, Scalable, High-Resolution, MEMS-Enabled Tactile Displays”, technical digest 16^th Solid-State Sensor, Actuator and Microsystems Workshop, Hilton Head Island SC, USA, pp. 127-130, June 8 – 12, 2014.

2013

• S. Cheng, F. A. Hill, E. V. Heubel, and L. F. Velásquez-García “A Compact X-ray Generator Using a Nanostructured Field Emission Cathode and a Microstructured Transmission Anode”, 13^th International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS), London, UK, December 3-6, 2013, Journal of Physics: Conference Series Volume 476 (2013) 012016 doi:10.1088/1742-6596/476/1/012016 Paper won the Best Proceedings Paper Award.
• A. A. Fomani, A. I. Akinwande, and L. F. Velásquez- García,  “Resilient, Nanostructured, High-Current, and Low-Voltage Neutralizers for Electric Propulsion of Small Spacecraft in Low Earth Orbit”, 13^th International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS), London, UK, December 3-6, 2013, IOP Journal of Physics: Conference Series Volume 476 (2013) 012014 doi:10.1088/1742-6596/476/1/012014.
• W. S. Graves, K.K. Berggren, S. Carbajo, R. Hobbs, K.-H. Hong, W.R. Huang, F.X. Kärtner, P.D. Keathley, D.E. Moncton, E. Nanni, K. Ravi, M. Swanwick, L.F. Velásquez-García, L.J. Wong, Y. Yang, L. Zapata, Y. Zhou, J. Bessuille, P. Brown, E. Ihloff, J. Derksen, A. Fallahi, F.X. Kärtner, F.Scheiba, X.Wu,D. Mihalcea, Ph. Piot, and I. Viti, “Compact XFEL Light Source”, Proceedings of the 35^th International Free-Electron Laser Conference, New York, NY, USA, pp. 757 – 761, August 26 – 30, 2013.
• M. Swanwick, P. D. Keathley, F. X. Kärtner, and L. F. Velásquez-García, “Nanostructured Silicon Photo-cathodes for X-ray Generation”, Technical Digest of the 26^th International Vacuum Nanoelectronics Conference (IVNC 2013), Roanoke VA, July 8 – 12, 2013.
• R. Hobbs, Y. Yang, P.D. Keathley, W.S. Graves, F.X. Kaertner, M.E. Swanwick, L.F. Velásquez-García, and K. Berggren, “Optically Actuated Nanostructured Electron-emitter Arrays”, Technical Digest of the 26^th International Vacuum Nanoelectronics Conference (IVNC 2013), Roanoke VA, July 8 – 12 2013.
• A. Fomani, L. F. Velásquez-García, and A. I. Akinwande, “A Low-voltage High-pressure Field Ionizer for Portable Analytical Instruments”, Technical Digest of the 26^th International Vacuum Nanoelectronics Conference (IVNC 2013), Roanoke VA, July 8 – 12 2013.
• F. A. Hill, P. Ponce de Leon, and L. F. Velásquez-García, “High-Throughput Ionic Liquid Electrospray Sources Based on Dense Monolithic Arrays of Emitters with Integrated Extractor Grid and Carbon Nanotube Flow Control Structures”, Technical Digest of the 17^th International Conference on Solid-State Sensors, Actuators, and Microsystems (Transducers 2013 & Eurosensors XXVII), Barcelona, Spain, pp. 2644 – 2647, June 16 – 20 2013.
• M. Swanwick, P. D. Keathley, F. X. Kärtner, and L. F. Velásquez-García, “Ultrafast Photo-Triggered Field Emission Cathodes Using Massive, Uniform Arrays Of Nano-Sharp High-Aspect-Ratio Silicon Structures”, Technical Digest of the 17^th International Conference on Solid-State Sensors, Actuators, and Microsystems (Transducers 2013 & Eurosensors XXVII), Barcelona, Spain, pp. 2680 – 2683, June 16 – 20 2013.
• R. G. Hobbs, Y. Yang, P. D. Keathley, William S. Graves, F. X. Kärtner, K. K. Berggren, M. Swanwick, and L. F. Velásquez-García “Optically Actuated Nanostructured Electron-Emitter Arrays” Technical Digest 57^th International Conference on Electron, Ion, and Photon Beam Technology and Nanofabrication, Nashville TN, May 28 – 31 2013.
• P. D. Keathley, M. Swanwick, A. Sell, W. P. Putnam, S. Guerrera, L. F. Velásquez-García, and F. X. Kaertner, “Strong-Field Emission From High Aspect Ratio Si Emitter Arrays”, Technical Digest of the American Physicist Society, Baltimore MD, http://meetings.aps.org/link/BAPS.2013.MAR.G41.4, March 18 – 22, 2013.
• E. V. Heubel and L. F. Velásquez-García,  “Batch-Fabricated MEMS Retarding Potential Analyzer for High-Accuracy Ion Energy Measurements”, Technical Digest of the 26^th IEEE International Conference on Micro Electro Mechanical Systems, Taipei, Taiwan, pp. 661 – 664, January 20 – 24, 2013.

2012

• E. V. Heubel, A. I. Akinwande, and L. F. Velásquez-García, “MEMS-Enabled Retarding Potential Analyzers for Hypersonic In-Flight Plasma Diagnostics”, Technical Digest of the 15^th Solid-State Sensor, Actuator and Microsystems Workshop, pp. 324 – 327, Hilton Head Island SC, USA, June 3 – 7, 2012.
• P. Ponce de Leon, F. A. Hill, and L. F. Velásquez-García, “Batch-Microfabricated Arrays of Electrospinning Emitters for High Throughput Generation of Nanofibers”, Technical Digest 12^th International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS), Atlanta GA, USA, pp. 227 – 230, December 2-5, 2012
• P. D. Keathley, W. P. Putnam, A. Sell, S. Guerrera, L. F. Velásquez-García, and F. X. Kaertner, “Laser Induced Annealing Dynamics of Photo-Electron Spectra from Silicon Field Emitter Arrays”, Technical Digest of the Conference on Lasers and Electro-Optics – CLEO, San Jose, CA, May 6-11, 2012.

2011

• S. A. Guerrera, L. F. Velásquez-García, and A. I. Akinwande, “Scaling of High Aspect Ratio Current Limiters for the Individual Ballasting of Large Arrays of Field Emitters”, Technical Digest 24^th International Vacuum Nanoelectronics Conference, Wuppertal, Germany, July 2011.

2010

• K. Cheung, L. F. Velásquez-García, and A. I. Akinwande, “High-Performance Square Electrode Quadrupole Mass Filters,”Technical Digest 23^rd IEEE International Conference on Micro Electro Mechanical Systems MEMS 2010, Hong Kong, SAR, China, pp. 867 – 870, Jan. 24 – 28 2010.

2009

• L. F. Velásquez-García, B. Gassend, and A. I. Akinwande, “CNT-Based Gas Ionizers with Integrated MEMS Gate for Portable Mass Spectrometry Applications,” Technical Digest of 15^th International Conference on Solid-State Sensors, Actuators and Microsystems, Denver CO, USA, pp. 1646-1649, June 21 – 25, 2009.
• L. F. Velásquez-García, Y. Niu, S. Guerrera, and A. I. Akinwande, “Advanced Cathodes for Novel Sub-mm Wave Compact Sources,” 34^th Government Microcircuit Applications and Critical Technology Conference, Orlando FL, USA, March 16-19, 2009.

• F. Eid, L. F. Velásquez-García, and C. Livermore, “Design, Fabrication, and Demonstration of a MEMS Steam Generator for Ejector Pump Applications,” Technical Digest 9^th International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS), Washington DC, USA, pp. 41 – 44, December 1-4, 2009. Paper won the Best Student Oral Presentation Award.

2008

• B. Gassend, L. F. Velásquez-García, A. I. Akinwande, and M. Martínez-Sánchez, “Fabrication of a Fully-Integrated Electrospray Array With Applications to Space Propulsion,” Technical Digest 21^st IEEE International Conference on Micro Electro Mechanical Systems, Tucson AZ, USA, pp. 976 – 979, Jan. 2008.
• T. J. Hogan, S. Taylor, K. Cheung, L. F. Velásquez-García, A. I. Akinwande, “Simulation of a square electrode MEMS quadrupole mass filter operating in stability zones 1 and 3,” 56^th ASMS Conference on Mass Spectrometry and Allied Topics, Denver CO, USA, June 1-5, 2008.
• L. F. Velásquez-García and A. I. Akinwande “A PECVD CNT-Based Open Architecture Field Ionizer for Portable Mass Spectrometry,” Technical Digest 21^st IEEE International Conference on Micro Electro Mechanical Systems, Tucson AZ, USA, pp. 742 – 745, Jan. 2008.
• K. Cheung, L. F. Velásquez-García, A. I. Akinwande, “Fully Batch-Fabricated Linear Quadrupole Mass Filters,” Technical Digest IEEE Solid-State Sensors, Actuators, and Microsystems Workshop, Hilton Head Island SC, USA, pp. 316-319, 2008.

2007

• L. F. Velásquez-García, K. Cheung, and A. I. Akinwande, “Improvements on an Out-of-Plane MEMS Quadrupole for Portable Mass Spectrometry,” Technical Digest of the 20^th International Vacuum Nanoelectronics Conference, Chicago IL, USA, July 8 – 12, 2007.
• K. Cheung, L. F. Velásquez-García, and A. I. Akinwande, “First Principles Optimization of Mass Producible Microscaled Linear Quadrupoles for Operation in Higher Stability Regions,” Technical Digest of the 20^th International Vacuum Nanoelectronics Conference, Chicago IL, USA, July 8 – 12, 2007.
• L. F. Velásquez-García and A. I. Akinwande, “An Out-of-Plane MEMS Quadrupole for a Portable Mass Spectrometer,” Technical Digest of the 14^th International Conference on Solid-State Sensors, Actuators and Microsystems, Vol. 2, pp 2315 – 2320, Lyon, France, June 10th – 14^th, 2007.
• B. Gassend, L. F. Velásquez-García, A. I. Akinwande and M. Martínez-Sánchez, “A Fully Integrated Microfabricated Externally Wetted Electrospray Thruster,” IEPC-2007-233, 30^th International Electric Propulsion Conference, Florence, Italy, September 17-20, 2007.
• B. Gassend, L. F. Velásquez-García, A. I. Akinwande, and M. Martínez–Sánchez, “A Fully Integrated Microfabricated Externally Wetted Electrospray Thruster,” AIAA-2007-5182, 43^rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference,Cincinnati OH, USA, July 8-11, 2007.
• L. F. Velásquez-García, B. Adeoti, Y. Niu and A. I. Akinwande, “Uniform High Current Field Emission of Electrons from Si and CNF FEAs Individually Controlled by Si Pillar Ungated FETs,” Technical Digest IEEE International Electron Device Meeting,Washington DC, USA, pp. 599 – 602, Dec. 2007.
• L-Y. Chen, L. F. Velasquez-Garcia, X. Wang, K. Teo and A. I. Akinwande, “A Micro Ionizer for Portable Mass Spectrometers using Double-gated Isolated Vertically Aligned Carbon Nanofiber Arrays,” Technical Digest IEEE International Electron Device Meeting, Washington DC, USA, pp. 843 – 846, Dec. 2007.
• L. F. Velásquez-García and A. I. Akinwande “A MEMS CNT-Based Neutralizer for Micro-propulsion Applications,” IEPC-2007-253, 30^th International Electric Propulsion Conference, Florence, Italy, September 17-20, 2007.
• L. F. Velásquez-García and A. I. Akinwande, “The Development of a Micro-Fabricated CNT-Based Neutralizer for Micro-Propulsion Applications” AIAA-2007-5255, 43^rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit,Cincinnati OH, USA July 8-11, 2007.
• L.-Y. Chen, L. F. Velásquez-García, X. Wang, K. Cheung, K. Teo, and A. I. Akinwande, “Design, Fabrication and Characterization of Double-Gated Vertically Aligned Carbon Nanofiber Field Emitter Arrays,” Technical Digest of the 20^th International Vacuum Nanoelectronics Conference, Chicago IL, USA, July 8 – 12, 2007.

2006

• L. F. Velásquez-García, T. F. Hill, B. A. Wilhite, K. F. Jensen, A. H. Epstein, and C. Livermore, “A MEMS Singlet Oxygen Generator for a MEMS Chemical Oxygen Iodine Laser,” Technical Digest of the 6^th International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications, pp. 117 – 120, Berkeley CA, USA, November 29th – December 1st 2006.
• T. F. Hill, L. F. Velásquez-García, B. A. Wilhite, A. H. Epstein, K. F. Jensen, and C. Livermore, “A MEMS Singlet Oxygen Generator,” Technical Digest of the Solid-State Sensor, Actuator and Microsystems Workshop, pp 114 – 119, Hilton Head Island SC, USA, June 4 – 8, 2006.

2005

• L. F. Velásquez-García, A. I. Akinwande, M. Martínez–Sánchez, “Development an Characterization of a Micro-fabricated Linear Array of Electrospray Emitters intended for Space Thruster Applications,” Technical Digest of the 18^th International Vacuum Nanoelectronics Conference, pp. 83 – 84, Oxford, UK, July 10 – 14, 2005.
• L. F. Velásquez, A. I. Akinwande, M. Martínez–Sánchez, “The Development an Experimental Characterization of a Planar Array of Micro-fabricated Electrospray Emitters for Space Propulsion Applications,” Technical Digest of the 18^th International Vacuum Nanoelectronics Conference, pp. 370 – 371, Oxford, UK, July 10 – 14, 2005.
• B. Gassend, L. F. Velásquez-García, A. I. Akinwande, M. Martínez–Sánchez, “Mechanical Assembly of Electrospray Thruster Grid,” IEPC 2005-101, 29^th International Electric Propulsion Conference, Princeton NJ, USA, October 31 – November 4, 2005.