Joshua J Melko

Assistant Professor

Chemistry • College of Arts & Sciences

Areas of Expertise

Education

  • National Research Council Postdoctoral Fellow, Air Force Research Laboratory, Albuquerque, NM, 2011-2014
  • Ph.D., Chemistry, The Pennsylvania State University, 2011.
  • Analyst, Mass Spectrometry and Uv-Vis Spectroscopy Division, PPB Environmental Services, Gainesville, FL, 2005-2006.
  • B.S., Chemistry, University of Florida, 2005.

Biography

Awards

  • 2011-2013 Research Associateship, National Research Council
  • 2010-2011 Apple Fellowship Award, The Pennsylvania State University
  • 2010 Graduate Student Travel Award, The Pennsylvania State University
  • 2009-2010 Geiger Fellowship Award, The Pennsylvania State University
  • 2007 Incoming Graduate Student Award, The Pennsylvania State University
  • 2006 Graduate Student Fellowship, The Pennsylvania State university

Publications & Presentations

Publications
  1. J.J. Melko, S.G. Ard, N.S. Shuman, A.A. Viggiano "Coupling an Electrospray Ionization Source and Direct Insertion Probe to a Selected Ion Flow Tube", Rev. Sci. Instrum., 2013, (Submitted).
  2. J. Xie, S. Kohale, W.L. Hase, S.G. Ard, J.J. Melko, N.S. Shuman, A.A. Viggiano, "Temperature Dependences of the OH- + CH3I Reaction Kinetics. Experimental and Simulation Studies, and Atomic-Level Dynamics", J. Phys. Chem. A, 2013 (Submitted).
  3. S. Cheng, C. Berkdemir, J.J. Melko, A.W. Castleman, Jr. "S-P Coupling Induced Stability Enhancement in Metal Clusters", J. Chem. Phys., 2013, (Submitted).
  4. J.J. Melko, S.G. Ard, N.S. Shuman, and A.A. Viggiano "Temperature Dependence for the Reactions of Ar+, O2+, and C7H7+ with Toluene and Ethylbenzene", Int. J. Mass Spectrom. Ion Processes, 2013, 353, 60-66.
  5. S.G. Ard, J.J. Melko, J.A. Fournier, N.S. Shuman, J. Troe and A.A. Viggiano "Reactions of Fe+ and FeO+ with C2H2, C2H4, and C2H6: Temperature Dependent Kinetics," J. Phys. Chem. A, 2013, (In Press).
  6. S. Cheng, C. Berkdemir, J.J. Melko and A.W. Castleman, Jr. "Probing the Electronic Structures and Relative Stabilities of Monomagnesium Oxide Clusters MgOx- and MgOx (x=1-4): A Combined Photoelectron Imaging and Theoretical Investigation", J. Phys. Chem. A, 2013, (In Press).
  7. S.G. Ard, J.J. Melko, B. Jiang, Y. Li, N.S. Shuman, H. Guo, A.A. Viggiano "Temperature Dependences for the Reactions of O2- and O- with N and O Atoms in a Selected-ion Flow Tube Instrument", J. Chem. Phys., 2013, 139, 144302.
  8. J.J. Melko, S.G. Ard, J.A. Fournier, J. Li, N.S. Shuman, H. Guo, J. Troe and A.A. Viggiano "Iron Cation Catalyzed Reduction of N2O by CO: Gas-phase Temperature Dependent Kinetics", Phys. Chem. Phys., 2013, 15, 11257-11267.
  9. J.A. Fournier, N.S. Shuman, J.J. Melko, S.G. Ard and A.A. Viggiano "A novel technique for measurement of thermal rate constants and temperature dependences of dissociative recombination", J. Chem. Phys., 2013, 138, 154201.
  10. J.J. Melko and A.W. Castleman, Jr. "Photoelectron Imaging of Small Aluminum Clusters: Quantifying s-p Hybridization", Phys. Chem. Chem. Phys., 2013, 15, 3173-3178.
  11. J.J. Melko, S.G. Ard, J.A. Fournier, N.S. Shuman, J. Troe and A.A. Viggiano "Exploring the Reactions of Fe+ and FeO+ with NO and NO2", J. Phys. Chem. A 2012, 116, 11500-11508.
  12. T.M. Miller, J.F. Friedman, N.S. Shuman, S.G. Ard, J.J. Melko and A.A. Viggiano "Electron Attachment to C7F14, Thermal Detachment from C7F14-, the Electron Affinity of C7F14, and Neutralization of C7F14- by Ar+", J. Phys. Chem. A, 2012, 116, 10293-10300.
  13. J.J. Melko, U. Werner, R. Mitric, V. Bonacic-Koutecky and A.W. Castleman, Jr. "Electronic Structure Similarites in PbxSby-, and SnxBiy- Clusters", J. Phys. Chem. A, 2011, 115, 10276-10280.
  14. U. Gupta, A.C. Reber, J.J. Melko, S.N. Khanna and A.W. Castleman, Jr. "Stability and Electronic Properties of Isoelectronic Heteroatomic Analogs of Sn52-", Chem. Phys. Lett., 2011, 505, 92-95.
  15. J.J. Melko, P.A. Clayborne, J.U. Reveles, C.E. Jones, Jr., U. Gupta, S.N. Khanna and A.W. Castleman, Jr. "A Combined Experimental and Theoretical Study of AlnX (n=1-5, X=As, Sb) Clusters", J. Phys. Chem. A, 2010, 114, 2045-2052.
  16. J.J. Melko, S.V. Ong, U. Gupta, J.U. Reveles, J. D'emidio, S.N. Khanna and A.W. Castleman, Jr. "Resilient Aromaticity in Lead-Indium Clusters", Chem. Phys. Lett., 2010, 500, 196-201.
  17. J.J. Melko, S.V. Ong, U. Gupta, J.U. Reveles, J. D'Emidio, S.N. Khanna and A.W. Castleman, Jr. "Anion Photoelectron Spectroscopy and First-Principles Study of PbxIny- Clusters", J. Phys. Chem. C, 2010, 114, 20907-20916.
  18. U. Gupta, J.U. Reveles, J.J. Melko, S.N. Khanna and A.W. Castleman, Jr. "Origins of Stability in Bismuth-Indium Clusters", J. Phys. Chem. C., 2010, 114, 15963-15972.
  19. P.A. Clayborne, C.E. Jones, Jr., U. Gupta, J.J. Melko, S.N. Khanna and A.W. Castleman, Jr. "Structural Evolution in Triniobium Carbide Clusters: Evidence of Large Cn Chains in Nb3Cn- Clusters", J. Phys. Chem. A., 2010, 114, 1290-1297.
  20. P.A. Clayborne, U. Gupta, A.C. Reber, J.J. Melko, S.N. Khanna and A.W. Castleman, Jr. "The Applicability of Three Dimensional Aromaticity in BiSnn- Zintl Analogues", J. Chem. Phys., 2010, 133, 134302.
  21. U. Gupta, J.U. Reveles, J.J. Melko, S.N. Khanna and A.W. Castleman, Jr. "Electron Delocalization in a Non-Cyclic All-Metal III-V Cluster", Chem. Phys. Lett., 2009, 480, 189-192.
  22. U. Gupta, J.U. Reveles, J.J. Melko, S.N. Khanna and A.W. Castleman, Jr. "Electronic Structure of Bi3Gay- Semiconductor Clusters and the Special Stability of Bi3Ga2- A Gas Phase Zintl Analogue", Chem. Phys. Lett., 2009, 467, 223-229.
  23. C.E. Jones, Jr., P.A. Clayborne, J.U. Reveles, J.J. Melko, U. Gupta, S.N. Khanna and A.W. Castleman, Jr. "AlnBi Clusters: Transitions between Aromatic and Jellium Stability", J. Phys. Chem. A, 2008, 112, 13316-13325.
  24. U. Gupta, A.C. Reber, P.A. Clayborne, J.J. Melko, S.N. Khanna and A.W. Castleman, Jr. "Effect of Charge and Composition on Structural Fluxionality and Stability of Nine Atom Tin-Bismuth Zintl Analogues", Inorganic Chemistry, 2008, 47, 10953-10958.

Presentations

  1. 2013 - Colloquium Seminar, Baylor University Department of Chemistry and Biochemistry, Waco, TX "Kinetics Measurements of Catalytic and Atmospheric Ionic Reactions: Mechanistic Insight and Theoretical Challenges" (Invited Talk)
  2. 2013 - Gordon Research Conference: Gaseous Ions, Galveston, TX "Temperature Dependent Kinetics of Catalytic Reactions" (Invited Talk)
  3. 2013 - Gordon Research Conference: Gaseous Ions, Galveston, TX "Kinetics  of Catalytic Reactions: Spin Crossings, Excited States, and Impurities" (Poster)
  4. 2012 - AFOSR MURI Annual Review Meeting: Novel Catalytic Mechanisms for Chemical Reduction of CO2 to Energy-Dense Liquids, Air Force, La Jolla, CA "Probing Reactive Intermediates and Temperature Dependent Kinetics" (Poster)
  5. 2012 - AFOSR Molecular Dynamics Program Review, Arlington, VA "Iron Catalyzed Oxidation Reactions: Temperature Dependent Kinetics" (Poster)
  6. 2011 - Guest Seminar, Mark Johnson Group, Yale University, New Haven, CT "Quantifying s-p Hybridization in Aluminum Clusters, and Progress on Constructing an Electrospray Ionization Source Coupled to a Selected Ion Flow Tube" (Oral Presentation)
  7. 2010 - The Cluster-Surface Interactions Workshop, Invited Meeting, Stratford-upon-Avon, England "Characterization and Deposition of Clusters for Nanoscale Materials" (Poster)
  8. 2010 - Gordon Research Conference: Photoions, Photoionization, and Photodetachment, Galveston, TX "Photoelectron Spectroscopy of III-V Mixed Metal Systems" (Poster)
  9. 2008 - APS: Division of Atomic, Molecular, and Optical Physics "On Becoming Aromatic: A Combined Experimental and Theoretical Study of Al3Bi" (Poster)
  10. 2008 - Gordon Research Conference: Clusters, Nanocrystalls, and NanoStructures, South Hadley, MA "Band-Gap Tuning in BixGay Clusters Using Photoelectron Spectroscopy and Imaging"

MelkoContact Information

Building 50, Room 2828

(904) 620-2565

josh.melko@unf.edu