Publications

.Journal Publications

  1. S.H. Ko, J. Yeo, S. Hong, D. Lee, K.H. Nam, N. Hotz, M.T. Lee, C.P. Grigoropoulos, "Digital Direct Metal Patterning for a Large Area Flexible Electronics Fabrication without Vacuum Deposition and Photolithography", 2012, accepted by PLOS One.
  2. N. Hotz, "Hybrid Solar System for Decentralized Electric Power Generation and Storage", 2012, accepted by Journal of Solar Energy Engineering.
  3. C. Kullmann, N.C. Schirmer, M.-T. Lee, S.H. Ko, N. Hotz, C.P. Grigoropoulos, D. Poulikakos, "3D Printing: 3D Micro Structures by Piezoelectric Inkjet Printing of Gold Nanoparticles", Journal of Micromechanics and Microengineering, Vol. 22, Issue 5, 055022, 2012.
  4. S.H. Ko, D. Lee, N. Hotz, J. Yeo, S. Hong, K.H. Nam, C.P. Grigoropoulos, "Digital selective growth of ZnO nanowire arrays from inkjet printing nanoparticle seed on a flexible substrate", Langmuir, Vol. 28, Issue 10, 4787-4792, 2012. Selected for Front Cover of Langmuir.
  5. N. Hotz, "Hydrogen production on the rooftop from sunlight and biofuel", SPIE Newsroom, DOI: 10.1117/2.1201110.003907, published online November 28, 2011.
  6. J. von Rickenbach, M. Nabavi, I. Zinovik, N. Hotz, D. Poulikakos, "A Detailed Surface Reaction Model of Butane Conversion over Rhodium Catalyst", International Journal of Hydrogen Energy, Vol. 36, Issue 19, 12238-12248, 2011.
  7. S.H. Ko, J. Chung, N. Hotz, K.H. Nam, C.P. Grigoropoulos, "Metal nanoparticle direct inkjet printing for low temperature 3D micro metal structure fabrication", Journal of Micromechanics and Microengineering, Vol. 20, Issue 12, 125010, 2010.
    Selected by IOPselect for its novelty, significance and potential impact on future research.
  8. C. Weinmueller, G. Tautschnig, N. Hotz, D. Poulikakos, "A Flexible Direct Methanol Micro Fuel Cell based on a Metalized, Photosensitive Polymer Film", Journal of Power Sources, Vol. 195, Issue 12, 3849-3857, 2010.
  9. M.-T. Lee, M. Werhahn, D.J. Hwang, N. Hotz, R. Greif, D. Poulikakos, C.P. Grigoropoulos, "Hydrogen Production with a Solar Steam-Methanol Reformer and Colloid Nanocatalyst", International Journal of Hydrogen Energy, Vol. 35, Issue 1, 118-126, 2010.
  10. N. Hotz, R. Zimmerman, C. Weinmueller, M.-T. Lee, C.P. Grigoropoulos, G. Rosengarten, D. Poulikakos, "Exergetic analysis and optimization of a solar-powered reformed methanol fuel cell micro-powerplant", Journal of Power Sources, Vol. 195, Issue 6, 1676-1687, 2010.
  11. N.B. Raberger, M.J. Stutz, N. Hotz, D. Poulikakos, "Simulation of the Post-Combustor for the Treatment of Toxic and Flammable Exhaust Gases of a Micro SOFC", ASME Journal of Fuel Cell Science and Technology, Vol. 6, Issue 4, 041002, 2009.
  12. C. Weinmueller, N. Hotz, A. Mueller, D. Poulikakos, "On two-phase flow patterns and transition criteria in aqueous methanol and CO2 mixtures in adiabatic, rectangular microchannels", International Journal of Multiphase Flow, Vol. 35, Issue 8, 760-772, 2009.
  13. N.C. Schirmer, T. Schwamb, B.R. Burg, N. Hotz, D. Poulikakos, "Controlled Free-Form Fabrication of Nanowires by Dielectrophoretic Dispension of Colloids", Applied Physics Letters, Vol. 95, 033111, 2009.
  14. N. Hotz, N. Koc, T. Schwamb, N.C. Schirmer, D. Poulikakos, "Catalytic porous ceramic prepared in-situ by sol-gelation for butane-to-syngas in micro-reactors", AIChE Journal, Vol. 55, Issue 7, 1849-1859, 2009.
  15. N. Hotz, N. Osterwalder, W.J. Stark, N.R. Bieri, D. Poulikakos, "Disk-shaped packed bed micro-reactor for butane-to-syngas processing", Chemical Engineering Science, Vol. 63, Issue 21, 5193-5201, 2008.
  16. A. Bieberle-Hütter, D. Beckel, A. Infortuna, U.P. Muecke, J.L. Rupp, L.J. Gauckler, S. Rey-Mermet, P. Muralt, N.R. Bieri, N. Hotz, M.J. Stutz, D. Poulikakos, P. Heeb, P. Müller, A. Bernard, R. Gmür, T. Hocker, "A Micro-Solid Oxide Fuel Cell System as Battery Replacement", Journal of Power Sources, Vol. 177, Issue 1, 123-130, 2008.
  17. N. Hotz, M. J. Stutz, S. Loher, W. J. Stark, D. Poulikakos, "Syngas production from butane using a flame-made Rh/Ce0.5Zr0.5O2 catalyst", Applied Catalysis B: Environmental, Vol. 73, 336-344, 2007.
  18. M.J. Stutz, N. Hotz, D. Poulikakos, "Optimization of methane reforming in a microreactor - effects of catalyst loading and geometry", Chemical Engineering Science, Vol. 61, 4027- 4040, 2006.
  19. N. Hotz, S.M. Senn, M.T. Lee, C.P. Grigoropoulos, D. Poulikakos, "Exergetic analysis of fuel cell micropowerplants fed by methanol", International Journal of Heat and Mass Transfer, Vol. 49, Issues 15-16, 2397-2411, 2006.
    7th most downloaded paper of IJHMT between April and June 2006, according to ScienceDirect.
  20. N. Hotz, S.M. Senn, D. Poulikakos, "Exergy analysis of a solid oxide fuel cell micropowerplant", Journal of Power Sources, Vol. 158, Issue 1, 333-347, 2006.

.Refereed Conference Publications

  1. N. Hotz, "Micro- And Nano-Structured Catalytic Reactor For Biofuel Reforming In A Solar Collector", 6th International Conference on Energy Sustainability and 10th Fuel Cell Science, Engineering and Technology Conference (ASME ESFuelCell2012), San Diego, CA, July 23-26, 2012.
  2. N. Hotz, "Solar-Powered Reformed Methanol Fuel Cell System", 6th International Conference on Energy Sustainability and 10th Fuel Cell Science, Engineering and Technology Conference (ASME ESFuelCell2012), San Diego, CA, July 23-26, 2012.
  3. N. Hotz, "Novel Porous Composite Material Containing Catalytic Nanoparticles for Hydrogen Production from Biofuel”, 2011 MRS Fall Meeting, Boston, MA, November 28 – December 2, 2011.
  4. N. Hotz. "Hybrid Solar System for Stationary Electric Power Generation", 2011 Energy Sustainability and Fuel Cell Conference (ASME ESFuelCell2011), Washington, DC, August 7-10, 2011.
  5. N. Hotz. "Hybrid Solar System for Stationary Electric Power Generation", National Solar Conference, Raleigh, NC, May 17-21, 2011.
  6. N. Hotz, H. Pan, C.P. Grigoropoulos, S.H. Ko. "Exergetic Analysis of Different Hybrid Energy Conversion and Storage Scenarios for Use of Solar Power in Stationary Applications", 4th International Conference on Energy Sustainability (ASME ES2010), Phoenix, AZ, May 17-22, 2010.
  7. N. Hotz, M.-T. Lee, C. Weinmueller, R. Zimmerman, G. Rosengarten, C.P. Grigoropoulos, D. Poulikakos. "Exergetic Analysis of a Solar-heated Fuel Cell System Fed by Methanol", 4th International Conference on Energy Sustainability (ASME ES2010), Phoenix, AZ, May 17-22, 2010.
  8. S.H. Ko, H. Pan, D. Lee, N. Hotz, C.P. Grigoropoulos. "Large Area Flexible Electronics Fabrication by Selective Laser Sintering of Nanoparticles with a Scanning Mirror", International Congress on Applications of Lasers & Electro–Optics, Orlando, FL, November 2-5, 2009.
  9. S.H. Ko, H. Pan, D. Lee, N. Hotz, C.P. Grigoropoulos. "Large Area Flexible Electronics Fabrication by Selective Laser Sintering of Nanoparticles with a Scanning Mirror", 2009 MRS Fall Meeting, Boston, MA, November 30-December 4, 2009.
  10. N. Hotz, D. Poulikakos, "Butane-to-syngas processing for micro SOFC systems", 5th Fuel Cell Research Symposium - Modeling and Experimental Validation, ZHAW, Winterthur, Switzerland, March 11-12, 2008.
  11. N. Hotz, N.R. Bieri, D. Poulikakos, "Exergetic efficiency of a disk-shaped packed bed micro-reactor for butane-to-syngas processing", 2nd European Fuel Cell Technology and Applications Conference (ASME EFC2007), Rome, Italy, December 11-14, 2007.
  12. A. Bieberle-Hütter, D. Beckel, A. Infortuna, U.P. Muecke, J.L. Rupp, L.J. Gauckler, S. Rey-Mermet, P. Muralt, N.R. Bieri, N. Hotz, M.J. Stutz, D. Poulikakos, P. Heeb, P. Müller, A. Bernard, R. Gmür, T. Hocker, "A Micro-Solid Oxide Fuel Cell System as Battery Replacement", 16th International Conference on Solid State Ionics (SSI-16), Shanghai Worldfield Convention Hotel, Shanghai, China, July 1-6, 2007.
  13. N. Hotz, S.M. Senn, D. Poulikakos, "Exergy analysis of a solid oxide fuel cell micropowerplant", 13th International Heat Transfer Conference 2006 (IHTC-13), Sydney Convention and Exhibition Centre, Sydney, Australia, August 13-18, 2006.
  14. M.J. Stutz, N. Hotz, D. Poulikakos, "Optimization of methane reforming in a microreactor - effects of catalyst loading and geometry", 3rd Fuel Cell Research Symposium - Modeling and Experimental Validation, EMPA, Dübendorf, Switzerland, March 16-17, 2006.
  15. N. Hotz, S.M. Senn, D. Poulikakos, "Exergetic analysis of fuel cell micro-powerplants fed by methanol", 3rd Fuel Cell Research Symposium - Modeling and Experimental Validation, EMPA, Dübendorf, Switzerland, March 16-17, 2006.

.Invited Talks

  1. N. Hotz, "Porous media for catalytic renewable energy conversion", 4th International Conference on Porous Media and its Applications in Science, Engineering and Industry, Potsdam, Germany, June 17-22, 2012.
  2. N. Hotz, "Hydrogen production from biofuel under sunlight: A hybrid approach", 243rd American Chemical Society (ACS) National Meeting, San Diego, CA, March 25-29, 2012.
  3. N. Hotz, "Thermodynamic Analysis and Micro- & Nanotechnology for Renewable and Sustainable Energy Solutions", Thermo/Fluids Seminar Series, UC Los Angeles, LA, CA, March 23, 2012.
  4. N. Hotz, "Nano-structured Composite Material for Solar-Powered Hydrogen Production from Biofuel", Micro-Nano Seminar Series, MIT, Cambridge, MA, November 30, 2011.
  5. N. Hotz. "Interfacial Transport Phenomena at the Micro- and Nanoscale for Renewable and Sustainable Energy Solutions", New Faculty Lecture Series, Duke University, Durham, NC, March 22, 2011.
  6. N. Hotz. "Interfacial Transport Phenomena at the Micro- and Nanoscale for Renewable and Sustainable Energy Solutions", UC Berkeley, Berkeley, CA, March 2, 2011.
  7. N. Hotz. "Micro- and Nanotechnology and Exergy Analysis for Renewable and Sustainable Energy Solutions", EPF Lausanne, Lausanne, Switzerland, March 25, 2010.
  8. N. Hotz, D. Poulikakos, "Butane-to-syngas processing on catalytic nanoparticles", 7th International Workshop on Catalytic Combustion (IWCC7), Lake Zurich, Switzerland, September 29-October 1, 2008.
  9. N. Hotz, D. Poulikakos, "A SOFC-based micro-powerplant: a battery replacement", 2nd Integration & Commercialization of Micro & Nanosystems International Conference & Exhibition (ASME MicroNano08), Clear Water Bay, Hong Kong, June 3-5, 2008.

.Books

  1. N. Hotz, "Butane-to-Syngas Processing in Novel Micro-Reactors: Experimental Investigation of Butane Reforming for Solid Oxide Fuel Cell-based Small-Scale Powerplants", Südwestdeutscher Verlag für Hochschulschriften, ISBN 978-3838107011, 2009.

.Patents

  1. N. Hotz, D. Poulikakos, A. Studart, A. Bieberle-Huetter, L.J. Gauckler, "Porous ceramic catalysts and methods for their production and use", Patent EP 2143490.
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