Publication List: R. Lee Penn

Influence of Size on Reductive Dissolution of Six-Line Ferrihydrite, Jasmine J. Erbs, Benjamin Gilbert, and R. Lee Penn, accepted with the Journal of Physical Chemistry C.

Titanium Dioxide Nanoparticles: Impact of Increasing Ionic Strength During Synthesis, Reflux and, Hydrothermal Aging, S. L. Isley and R. L. Penn, in press with the Materials Research Bulletin.

Controlling Oriented Aggregation using Increasing Reagent Concentrations and Trihalo Acetic Acid Surfactants, A. S. Ratkovich and R. L. Penn, accepted with the Journal of Solid State Chemistry.

Zinc Oxide Nanoparticle Growth from Homogenous Solution: Influence of Zn:OH, Water Concentration, and Surfactant Additives, A. S. Ratkovich and R. L. Penn, in review with the Materials Research Bulletin.

Titanium Dioxide Nanoparticles: Effect of Sol-Gel pH on Phase Composition, Particle Size, and Particle Growth Mechanism, S. L. Isley and R. L. Penn, in press with the Journal of Physical Chemistry C.

Nanominerals, Mineral Nanoparticles, and Earth Chemistry. Michael F. Hochella, Jr., Steven K. Lower, Patricia A. Maurice, R. Lee Penn, Nita Sahai, Donald L. Sparks, Benjamin S. Twining, Science, 319: 1631-1635.

Aging of iron nanoparticles in aqueous solution: Effects on structure and reactivity. Sarathy, Vaishnavi, Tratnyek, Paul G, Nurmi, James T., Baer, Donald R., Amonette, James E., Chun, Chan Lan, Penn, R. Lee, Reardon, Eric J.
Journal of Physical Chemistry C, 112: 2286-2293

Layer structure preservation during swelling, pillaring, and exfoliation of a zeolite precursor. Maheshwari, Sudeep, Jordan, Edgar, Kumar, Sandeep, Bates, Frank S., Penn, R. Lee, Shantz, Daniel F., Tsapatsis, Michael. Journal of the American Chemical Society, 130: 1507-1516.

Controlling Nanosized ZnO Growth Kinetics using Various Zn:OH Concentration Ratios. A. S. Ratkovich and R. L. Penn, Journal of Physical Chemistry C., 111: 14098-14104.

Size Dependent Kinetics of Oriented Aggregation. R. L. Penn, K. Tanaka, and J. J. Erbs, Journal of Crystal Growth, 309: 97-102.

Evolving Surface Reactivity of Cobalt Oxyhydroxide Nanoparticles. J. C. Myers and R. L. Penn (2007) Journal of Physical Chemistry C, 111: 10597-10602.

Influence of Aluminum Substitution on the Reactivity of Magnetite Nanoparticles. T. Jentzsch, C.L. Chun, R. S. Gabor, and R. L. Penn (2007), Journal of Physical Chemistry C, 111:10247-10253.

High Crystallinity Si-Ferrihydrite: An Insight into its Néel Temperature and Size Dependence of Magnetic properties. T. S. Berquó, S. K. Banerjee, R. G. Ford, R. L. Penn, and T. Pichler (2007), Journal of Geophysical Research, 112:B02102/1-B02102/12.

Aggregative Growth of Silicalite-1. S. Kumar, T. M. Davis, H. Ramanan, R. L. Penn, and M. Tsapatsis (2007), Journal of Physical Chemistry B, 111:3398-3403.

The Adsorption of Perfluorooctane Sulfonate onto Sand, Clay, and Iron Oxide Surfaces. R. L. Johnson, A. J. Anschutz, J. M. Smolen, M. F. Simcik, and R. L. Penn (2007), Journal of Chemical & Engineering Data, 52:1156-1161.

Influence of Ionic Strength on Brookite Content in Sol-Gel Synthesized Titania before and after Hydrothermal Aging. S. L. Isley, E. R. Anderson, and R. L. Penn (2006), Electrochemical Society Transactions, 9:37.

Controlled growth of alpha-FeOOH nanorods by exploiting oriented aggregation. R. Lee Penn, J. Erbs, and D. Gulliver, (2006). Journal of Cyrstal Growth, 293:1-4.

Rock Magnetic, Chemical, and Bacterial Community Analysis of a Modern Soil from Nebraska. Y. Guyodo, T. M. LaPara, Amy J. Anschutz, R. L. Penn, , S. K. Banerjee, C. E. Geiss, and W. Zanner (2006), Earth and Planetary Science Letters 251: 168-178

Relative Brookite and Anatase Content in Sol-Gel Synthesized Titanium Dioxide Nanoparticles. Sara Isley and R. Lee Penn, Journal of Physical Chemistry B, 110:15134-15139.

Influence of Aluminum Doping on Ferrihydrite Nanoparticle Reactivity. Teresa Jentzsch and R. Lee Penn (2006), Journal of Physical Chemistry B, 110:3299-3304.

Kinetic and Microscopic Studies of Reductive Transformations of Organic Contaminants on Goethite. C. L. Chun, R. L. Penn, and W. A. Arnold (2006), Environmental Science and Technology, 40: 3299-3304.

Magnetic Properties of Synthetic Six-Line Ferrihydrite Nanoparticles. Y. Guyodo, S. K. Banerjee, R. L. Penn, D. J. Burleson, T. S. Berquo, T. Seda, and P. Solheid (2006), Physics of the Earth and Planetary Interior, special issue on “Developments in Techniques and Methods Related to Rock Magnetism,” 154: 222-233.

Mechanistic Principles of Nanoparticle Evolution to Zeolite Crystals. T. M. Davis, T. O. Drews, H. Ramanan, C. He, H. Schnablegger, M. A. Katsoulakis, E. Kokkoli, R. L. Penn, and M. Tsapatsis (2006), Nature Materials, 5: 400-408.

Building a Successful Middle School Outreach Effort: Microscopy Camp 2005. R. L. Penn, L. Flynn, and P. Johnson. Journal of Chemical Education (accepted - expected publication date is early 2007 - please feel invited to request a pre-print by email).

Magnetic Properties of Synthetic Six-Line Ferrihydrite Nanoparticles. Y. Guyodo, S. K. Banerjee, R. L. Penn, D. J. Burleson, T. S. Berquo, T. Seda, and P. Solheid (2006), Physics of the Earth and Planetary Interior special issue on “Developments in Techniques and Methods Related to Rock Magnetism,” 154: 222-233.

Two-Step Growth of Goethite from Ferrihydrite. D. J. Burleson and R. L. Penn (2006), Langmuir; 22:402-409.

Reduction of Crystalline Iron (III) Oxyhydroxides Using Hydroquinone: Influence of Phase and Particle Size. A. J. Anschutz and R. L. Penn (2005), Geochemical Transactions, 6:60-66.

On the Characterization of Environmental Nanoparticles. D. J. Burleson, M. D. Driessen, and R. L. Penn (2004) an invited review article for the Journal of Environmental Science and Health Part A, A39:2707-2753. (invited and peer-reviewed article)

Characterization and Properties of Metallic Iron Nanoparticles: Spectroscopy, Electrochemistry, and Kinetics. J. T. Nurmi, P. G. Tratnyek, V. Sarathy, D. R. Baer, J. E. Amonette, K. H. Pecher, C. Wang, J. C. Linehan, D. W. Matson, R. L. Penn, and M. D. Driessen (2005) Nanoscale Environmental Science and Technology Issue of Environmental Science and Technology, 39:1221-1230.

Kinetics of Oriented Aggregation. R. L. Penn (2004) Journal of Physical Chemistry B, 108:12707-12712.

From Nanodots to Nanorods: Oriented Aggregation and Magnetic Evolution of Nanocrystalline Goethite. Y. Guyodo, A. Mostrom, R. L. Penn, and S. K. Banerjee (2003) Geophysical Research Letters, 30, 19-1 - 19-4.

The Growth Kinetics of TiO2 Nanoparticles from Titanium(IV) Alkoxide at High Water/Titanium Ratio. G. Oskam, A. Nellore, R. L. Penn, and P. C. Searson (2003) Journal of Physical Chemistry B, 107, 1734-1738.

The Influence of Anion on the Coarsening Kinetics of ZnO nanoparticles. Z. S. Hu, G. Oskam, R. L. Penn, N. Pesika, and P. C. Searson (2003) Journal of Physical Chemistry B, 107, 3124-3130.

Coarsening of metal oxide nanoparticles. G. Oskam, Z. S. Hu, R. L. Penn, N. Pesika, and P. C. Searson (2002) Physical Review E, 66, art. no. 011403 (4 pages).

Epitaxial Assembly in Aged Colloids. R. L. Penn, G. Oskam, T. J. Strathmann, P. C. Searson, A. T. Stone, and D. R. Veblen (2001) Journal of Physical Chemistry, B, 105, 2177-2182.

Defects and disorder: Probing the surface chemistry of heterogenite (CoOOH) by dissolution using hydroquinone and iminodiacetic acid. R. L. Penn, A. T. Stone, and D. R. Veblen (2001) Journal of Physical Chemistry, 105, 4690-4697.

"Iron Oxide" Coatings on Sand Grains from the Atlantic Coastal Plain: HRTEM Characterization. R. L. Penn, C. Zhu, H. Xu, and D. R. Veblen (2001) Geology, 29, 843–846.

Condensation and Commentary of "Discrete Atom Imaging of One-Dimensional Crystals Formed Within Single-Walled Carbon Nanotubes" by R. R. Meyer et al., (2000) Science 289, 1324-1326; CHEMTRACTS -- Inorganic Chemistry, volume 13, pages 825-827.

Preferential dissolution along misoriented boundaries in heterogenite. R. L. Penn, A. T. Stone, D. R. Veblen. In the Materials Research Society Proceedings for SYMPOSIUM M: Morphology and Dynamics of Crystal Surfaces in Complex Molecular Systems, in press.

Exchange Coupling in Epitaxial CoO/NiFe Bilayers with Compensated and Uncompensated Interfacial Spin Structures. N. J. Gökemeijer, R. L. Penn, D. R. Veblen, and C. L. Chien, Physical Review, B, 63 (17): art. no. 174422, May, 2001.

Aggregation-based crystal growth and microstructure development in natural iron oxyhydroxide biomineralization products. J.F. Banfield, S.A. Welch, H.Z. Zhang, T.T. Ebert, R.L. Penn (2000) Science, 289, 751-754.

Imperfect oriented attachment: Dislocation generation in defect-free nanocrystals. J. F. Banfield and R. L. Penn (1998) Science, 281, 969-971.

The anatase to rutile phase transformation: Nucleation at {112} anatase twin boundaries. R. L. Penn and J. F. Banfield (1999) American Mineralogist, 84, 871-876.

Morphology development and crystal growth in nanocrystalline aggregates under hydrothermal conditions: Insights from titania. R.L. Penn and J.F. Banfield (1999) Geochimica et Cosmochimica Acta, 63, 1549-1557.

Oriented attachment and growth, twinning, polytypism, and formation of metastable phases: Insights from nanocrystalline TiO2. R.L. Penn and J.F. Banfield (1998) American Mineralogist, 83, 1077-1082.

Enhanced adsorption of molecules on surfaces of nanocrystalline particles.
H.Z. Zhang, R.L. Penn, R.J. Hamers, and J.F. Banfield (1999) Journal of Physical Chemistry B 103, 4656-4662.

TEM investigation of Lewiston, Idaho Fibrolite: Implications for grain boundary energetics and Al2SiO5 phase relations. R. L. Penn, J. F. Banfield, and D. M. Kerrick (1999) American Mineralogist, 84, 152-159.

Synthesis of nanocrystalline Barium Hexaferrite from nanocrystalline goethite using the hydrothermal method. R. L. Penn, J. F. Banfield, J. Voigt; Proceedings of the 1996 Spring Meeting of the Materials Research Society SYMPOSIUM S: Aqueous Chemistry and Geochemistry of Oxides, Oxyhydroxides, and Related Materials, 432, 175-181.

Mechanical properties of metals: Experiments with steel, copper, tin, zinc, and soap bubbles. M. Geselbracht, A. Ellis, R. Penn, and G. Lisensky (1994) Journal of Chemical Education, 71, 254-61.

Periodic properties in a family of common semiconductors: Experiment with light emitting diodes. G. Lisensky, R. Penn, M. Geselbracht, and A. Ellis (1992) Journal of Chemical Education, 69, 151-6.

Electro-optical evidence for the chelate effect at semiconductor surfaces. G. Lisensky, R. Penn, C. Murphy, and A. Ellis (1990) Science, 248, 840-843.