Multiplexed Electrospray Devices

• B. Gassend, L. F. Velásquez-García, A. I. Akinwande and M. Martinez-Sanchez, “A Microfabricated Planar Electrospray Array Ionic Liquid Ion Source with Integrated Extractor,” Journal of Microelectromechanical Systems, Vol. 18, No. 3, pp. 679 – 694, 2009.
• L. F. Velásquez-García, A. I. Akinwande, and M. Martínez–Sánchez, “A Micro-fabricated Linear Array of Electrospray Emitters for Thruster Applications,“ Journal of Microelectromechanical Systems, Vol. 15, No. 5, pp. 1260–1271, 2006.
• L. F. Velásquez-García, A. I. Akinwande, and M. Martínez–Sánchez, “A Planar Array of Micro-fabricated Electrospray Emitters for Thruster Applications,” Journal of Microelectromechanical Systems, Vol. 15, No. 5, pp. 1272–1280, 2006.

Miniaturized Analytical Devices and Systems

• K. Cheng, L. F. Velásquez-García, and A. I. Akinwande, “Chip-Scale Quadrupole Mass Filters for Portable Mass Spectrometry,” Journal of Microelectromechanical Systems, Vol. 19 No. 3, pp. 469–483, 2010.
• T. J. Hogan, S. Taylor, K. Cheung, L. F. Velásquez-García, A. I. Akinwande, and R. E. Pedder, “Performance Characteristics of a MEMS Quadrupole Mass Filter with Square Electrodes – Experimental and Simulated Results”, IEEE Transactions on Instrumentation and Measurement, Vol. 59, No. 9, pp. 2458-2467, Sept. 2010.
• L. F. Velásquez-García, K. Cheung, and A. I. Akinwande, “An Application of 3D MEMS Packaging: Out-Of-Plane Quadrupole Mass Filters,” Journal of Microelectromechanical Systems, Vol. 16, No. 6, pp. 1430–1438, 2008.

Multiplexed Needles

• B. Gassend, L. F. Velásquez-García, and A. I. Akinwande, “Design and Fabrication of DRIE-Patterned Complex Needle-Like Structures,” Journal of Microelectromechanical Systems, Vol. 19, No. 3, pp. 589–598, 2010.

Multiplexed Field Electron Devices

• P. D. Keathley, A. Sell, W. P. Putnam, S. Guerrera, L. F. Velásquez-García, and F. X. Kartner, “Strong-Field Photo-Emission From Silicon Field Emitter Arrays”, Annalen Der Physik, doi: 10.1002/andp.201200189, 2012.
• S. 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”, IEEE Transactions on Electron Devices, Vol. 59, pp. 2524 – 2530, 2012
• L.-Y. Chen, L. F. Velásquez-García, X. Wang, K. Cheung, K. Teo, and A. I. Akinwande, “A Microionizer for Portable Mass Spectrometers using Double-Gated Isolated Vertically Aligned Carbon Nanofiber Arrays,“ IEEE Transactions in Electron Devices, Vol. 58. No. 7, pp. 2149-2158, 2011.