All Stories

  1. Microfabricated Retarding Potential Analyzers With Enforced Aperture Alignment for Improved Ion Energy Measurements in Plasmas

    Article • Journal of Microelectromechanical Systems, October 2015, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  2. Multiplexing and scaling-down of nanostructured photon-triggered silicon field emitter arrays for maximum total electron yield

    Article • Nanotechnology, June 2015, Institute of Physics Publishing

    Dr Luis F Velasquez-Garcia

  3. Parallel nanomanufacturing via electrohydrodynamic jetting from microfabricated externally-fed emitter arrays

    Article • Nanotechnology, May 2015, Institute of Physics Publishing

    Dr Luis F Velasquez-Garcia

  4. A portable x-ray source with a nanostructured Pt-coated silicon field emission cathode for absorption imaging of low-Z materials

    Article • Journal of Physics D Applied Physics, May 2015, Institute of Physics Publishing

    Dr Luis F Velasquez-Garcia

  5. High-throughput electrospray for nanomanufacturing and nanosatellite propulsion

    Article • SPIE Newsroom, January 2015, SPIE

    Dr Luis F Velasquez-Garcia

  6. Velocity Map Imaging of Electrons Strong-Field Photoemitted from Si-Nanotip Arrays

    Article • January 2015, Springer Science + Business Media

    Dr Luis F Velasquez-Garcia

  7. Advances on Ultrafast Silicon Field Emitter Array Photocathodes for Coherent Radiation Sources Based on Inverse Compton Scattering

    Article • Journal of Physics Conference Series, November 2014, Institute of Physics Publishing

    Dr Luis F Velasquez-Garcia

  8. Scalable, MEMS-enabled, vibrational tactile actuators for high resolution tactile displays

    Article • Journal of Micromechanics and Microengineering, November 2014, Institute of Physics Publishing

    Dr Luis F Velasquez-Garcia

  9. Resilient Batch-Fabricated Planar Arrays of Miniaturized Langmuir Probes for Real-Time Measurement of Plasma Potential Fluctuations in the HF to Microwave Frequency Range

    Article • Journal of Microelectromechanical Systems, October 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  10. High-Throughput Ionic Liquid Ion Sources Using Arrays of Microfabricated Electrospray Emitters With Integrated Extractor Grid and Carbon Nanotube Flow Control Structures

    Article • Journal of Microelectromechanical Systems, October 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  11. Nanostructured Ultrafast Silicon-Tip Optical Field-Emitter Arrays

    Article • Nano Letters, September 2014, American Chemical Society (ACS)

    Dr Luis F Velasquez-Garcia

  12. Current limitation in large-area self-aligned gated field emission arrays

    Article • July 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  13. Pitch scaling of ultrafast, optically-triggered silicon field emitter arrays

    Article • July 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  14. Challenges of high vacuum pumping based on impact ionization and implantation processes

    Article • July 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  15. Toward Amp-Level Field Emission With Large-Area Arrays of Pt-Coated Self-Aligned Gated Nanoscale Tips

    Article • IEEE Transactions on Electron Devices, July 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  16. Low-Voltage Field Ionization of Gases Up to Torr-Level Pressures Using Massive Arrays of Self-Aligned Gated Nanoscale Tips

    Article • IEEE Transactions on Electron Devices, May 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  17. Space Charge Effects in Strong-Field Emission From a Nanostructured Si Cathode

    Article • January 2014, Optical Society of America (OSA)

    Dr Luis F Velasquez-Garcia

  18. Low-Bremsstrahlung X-Ray Source Using a Low-Voltage High-Current-Density Nanostructured Field Emission Cathode and a Transmission Anode for Markerless Soft Tissue Imaging

    Article • Journal of Microelectromechanical Systems, January 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  19. Velocity Map Imaging of Electrons Strong-Field Photoemitted from Si-Nanotip

    Article • January 2014, Optical Society of America (OSA)

    Dr Luis F Velasquez-Garcia

  20. Resilient, Nanostructured, High-Current, and Low-Voltage Neutralizers for Electric Propulsion of Small Spacecraft in Low Earth Orbit

    Article • Journal of Physics Conference Series, December 2013, Institute of Physics Publishing

    Dr Luis F Velasquez-Garcia

  21. A low-voltage high-pressure field ionizer for portable analytical instruments

    Article • July 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  22. Nanostructured silicon photo-cathodes for x-ray generation

    Article • July 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  23. High-density optically actuated Au nanorod electron emitter arrays

    Article • July 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  24. Ultrafast photo-triggered field emission cathodes using massive, uniform arrays of nano-sharp high-aspect-ratio silicon structures

    Article • June 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  25. High-throughput ionic liquid electrospray sources based on dense monolithic arrays of emitters with integrated extractor grid and carbon nanotube flow control structures

    Article • June 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  26. Batch-fabricated MEMS retarding potential analyzer for high-accuracy ion energy measurements

    Article • January 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  27. Strong-field photoemission from silicon field emitter arrays

    Article • Annalen der Physik, December 2012, Wiley

    Dr Luis F Velasquez-Garcia

  28. Scaling of High-Aspect-Ratio Current Limiters for the Individual Ballasting of Large Arrays of Field Emitters

    Article • IEEE Transactions on Electron Devices, September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  29. Laser Induced Annealing Dynamics of Photo-Electron Spectra from Silicon Field Emitter Arrays

    Article • January 2012, Optical Society of America (OSA)

    Dr Luis F Velasquez-Garcia

  30. A Microionizer for Portable Mass Spectrometers Using Double-Gated Isolated Vertically Aligned Carbon Nanofiber Arrays

    Article • IEEE Transactions on Electron Devices, July 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  31. Uniform High-Current Cathodes Using Massive Arrays of Si Field Emitters Individually Controlled by Vertical Si Ungated FETs—Part 1: Device Design and Simulation

    Article • IEEE Transactions on Electron Devices, June 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  32. Uniform High-Current Cathodes Using Massive Arrays of Si Field Emitters Individually Controlled by Vertical Si Ungated FETs—Part 2: Device Fabrication and Characterization

    Article • IEEE Transactions on Electron Devices, June 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  33. Design, fabrication and demonstration of a MEMS steam generator for ejector pump applications

    Article • Journal of Micromechanics and Microengineering, September 2010, Institute of Physics Publishing

    Dr Luis F Velasquez-Garcia

  34. Performance Characteristics of a MEMS Quadrupole Mass Filter With Square Electrodes: Experimental and Simulated Results

    Article • IEEE Transactions on Instrumentation and Measurement, September 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  35. CNT-Based MEMS/NEMS Gas Ionizers for Portable Mass Spectrometry Applications

    Article • Journal of Microelectromechanical Systems, June 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  36. Chip-Scale Quadrupole Mass Filters for Portable Mass Spectrometry

    Article • Journal of Microelectromechanical Systems, June 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  37. Design and Fabrication of DRIE-Patterned Complex Needlelike Silicon Structures

    Article • Journal of Microelectromechanical Systems, June 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  38. High-performance MEMS square electrode quadrupole mass filters for chip-scale mass spectrometry

    Article • January 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  39. CNT-based gas ionizers with integrated MEMS gate for portable mass spectrometry applications

    Article • June 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  40. A Microfabricated Planar Electrospray Array Ionic Liquid Ion Source With Integrated Extractor

    Article • Journal of Microelectromechanical Systems, June 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  41. Precision In-Plane Hand Assembly of Bulk-Microfabricated Components for High-Voltage MEMS Arrays Applications

    Article • Journal of Microelectromechanical Systems, April 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  42. An Application of 3-D MEMS Packaging: Out-of-Plane Quadrupole Mass Filters

    Article • Journal of Microelectromechanical Systems, December 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  43. Design of a silicon-based microscale trickle-bed system for singlet-oxygen production

    Article • AIChE Journal, September 2008, Wiley

    Dr Luis F Velasquez-Garcia

  44. Fabrication of large arrays of high-aspect-ratio single-crystal silicon columns with isolated vertically aligned multi-walled carbon nanotube tips

    Article • Nanotechnology, August 2008, Institute of Physics Publishing

    Dr Luis F Velasquez-Garcia

  45. A PECVD CNT-based open architecture field ionizer for portable mass spectrometry

    Article • January 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  46. Fabrication of a fully integrated electrospray array with applications to space propulsion

    Article • January 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  47. A MEMS Singlet Oxygen Generator—Part II: Experimental Exploration of the Performance Space

    Article • Journal of Microelectromechanical Systems, December 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  48. A MEMS Singlet Oxygen Generator—Part I: Device Fabrication and Proof of Concept Demonstration

    Article • Journal of Microelectromechanical Systems, December 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  49. A Fully Microfabricated Externally Wetted Electrospray Thruster

    Article • July 2007, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Luis F Velasquez-Garcia

  50. The Development of a Micro-Fabricated CNT-Based Neutralizer for Micro-Propulsion Applications

    Article • July 2007, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Luis F Velasquez-Garcia

  51. Precision Hand Assembly of MEMS Subsystems Using DRIE-Patterned Deflection Spring Structures: An Example of an Out-of-Plane Substrate Assembly

    Article • Journal of Microelectromechanical Systems, June 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  52. Singlet oxygen generator on a chip for MEMS-based COIL

    Article • February 2007, SPIE

    Dr Luis F Velasquez-Garcia

  53. Design, fabrication and characterization of double-gated vertically aligned carbon nanofiber field emitter arrays

    Article • January 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  54. Improvements on an out-of-plane MEMS quadrupole for portable mass spectrometry

    Article • January 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  55. First principles optimization of mass producible microscaled linear quadrupoles for operation in higher stability regions

    Article • January 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  56. A Micro Ionizer for Portable Mass Spectrometers using Double-gated Isolated Vertically Aligned Carbon Nanofiber Arrays

    Article • January 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  57. Uniform High Current Field Emission of Electrons from Si and CNF FEAs Individually Controlled by Si Pillar Ungated FETs

    Article • January 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  58. An Out-of-Plane MEMS Quadrupole for a Portable Mass Spectrometer

    Article • January 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  59. A Planar Array of Micro-Fabricated Electrospray Emitters for Thruster Applications

    Article • Journal of Microelectromechanical Systems, October 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  60. A Micro-Fabricated Linear Array of Electrospray Emitters for Thruster Applications

    Article • Journal of Microelectromechanical Systems, October 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  61. A Microfabricated Electrospray Thruster Using Ridge Emitters and Ceramic-Ball Extractor Location

    Article • July 2006, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Luis F Velasquez-Garcia

  62. Two-Dimensional Microfabricated Colloid Thruster Arrays

    Article • July 2004, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Luis F Velasquez-Garcia

  63. A Microfabricated Colloid Thruster Array

    Article • July 2002, American Institute of Aeronautics and Astronautics (AIAA)

    Dr Luis F Velasquez-Garcia

  64. Arrays of micro-fabricated quadrupole mass filters

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  65. Fabrication and characterization of a micro-fabricated linear array of electrospray emitters intended for space thruster applications

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia

  66. Fabrication and experimental characterization of a planar array of micro-fabricated electrospray emitters for space propulsion applications

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Dr Luis F Velasquez-Garcia