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  1. Article

    Open Access

    Phase transitions in few-monolayer spin ice films

    Vertex models are an important class of statistical mechanical system that admit exact solutions and exotic physics. Applications include water ice, ferro- and antiferro-electrics, spin ice and artificial spin...

    L. Bovo, C. M. Rouleau, D. Prabhakaran, S. T. Bramwell in Nature Communications (2019)

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  2. No Access

    Article

    Speciation and Electronic Structure of La1−xSrxCoO3−δ During Oxygen Electrolysis

    Cobalt-containing perovskite oxides are promising electrocatalysts for the oxygen evolution reaction (OER) in alkaline electrolyzers. However, a lack of fundamental understanding of oxide surfaces impedes rati...

    Kelsey A. Stoerzinger, **ao Renshaw Wang, Jonathan Hwang… in Topics in Catalysis (2018)

  3. No Access

    Article

    Growth of epitaxial TiN (111) thin films with low resistivity on Si (111) by crossed-beam pulsed laser deposition

    Titanium nitride (TiN) thin films were grown epitaxially on Si (111) substrates by reactive pulsed laser deposition. Substrate temperatures ranged from 550 to 950 °C while plume kinetic energies ranged from 46...

    Sukill Kang, C. M. Rouleau in Journal of the Korean Physical Society (2017)

  4. No Access

    Chapter

    All Carbon Nanotubes Are Not Created Equal

    This chapter presents the various factors that enter into consideration when choosing the source of carbon nanotubes for a specific application. Carbon nanotubes are giant molecules made of pure carbon. They h...

    Gyula Eres, D.B. Geohegan, A.A. Puretzky… in Nanotechnology for Electronics, Photonics,… (2010)

  5. No Access

    Article

    Pulsed laser CVD investigations of single-wall carbon nanotube growth dynamics

    The nucleation and rapid growth of single-wall carbon nanotubes (SWNTs) were explored by pulsed-laser assisted chemical vapor deposition (PLA-CVD). A special high-power, Nd:YAG laser system with tunable pulse ...

    Z. Liu, D. J. Styers-Barnett, A. A. Puretzky, C. M. Rouleau, D. Yuan… in Applied Physics A (2008)

  6. No Access

    Article

    Altering the catalytic activity of thin metal catalyst films for controlled growth of chemical vapor deposited vertically aligned carbon nanotube arrays

    The growth rate and terminal length of vertically aligned carbon nanotube arrays (VANTAs) grown by chemical vapor deposition have been dramatically improved through pulsed KrF excimer laser pretreatments of mu...

    C. M. Rouleau, G. Eres, H. Cui, H. M. Christen, A. A. Puretzky… in Applied Physics A (2008)

  7. No Access

    Article

    Cumulative and continuous laser vaporization synthesis of single wall carbon nanotubes and nanohorns

    The conditions for the scaled synthesis of single wall carbon nanotubes (SWNTs) and single wall carbon nanohorns (SWNHs) by laser vaporization at high temperatures are investigated and compared using in situ d...

    A. A. Puretzky, D. J. Styers-Barnett, C. M. Rouleau, H. Hu, B. Zhao… in Applied Physics A (2008)

  8. No Access

    Article

    Compositionally Asymmetric Tri-Color Superlattices Grown by Pulsed Laser Deposition

    Compositionally asymmetric tri-color superlattices (TCS) with a combination of BaTiO3/SrTiO3/CaTiO3 have been grown by pulsed laser deposition (PLD) on atomically-flat SrRuO3-covered (001) SrTiO3 substrates. Cond...

    H. N. Lee, H. M. Christen, C. M. Rouleau, S. Senz… in MRS Online Proceedings Library (2004)

  9. No Access

    Article

    Effect of Sulfur Surface Structure on Nucleation of Oxide Seed Layers on Textured Metals for Coated Conductor Applications

    We present a study of the {100}<100> biaxially textured Ni (001) surface and oxide seed layer nucleation by in situ reflection high-energy electron diffraction and Auger electron spectroscopy. Our observations re...

    C. Cantoni, D. K. Christen, A. Goyal, L. Heatherly… in MRS Online Proceedings Library (2002)

  10. No Access

    Article

    Formation of Nanostructures in Silicon by Nanosecond-Pulsed Laser Irradiation

    Silicon nanoparticles are formed during pulsed laser ablation under a background atmosphere of Ar gas. In this paper we have characterized the nanoparticles that are backscattered via collisions in the gas pha...

    J. D. Fowlkes, A. J. Pedraza, S. Jesse, C. M. Rouleau… in MRS Online Proceedings Library (2000)

  11. No Access

    Article

    Pulsed KrF laser deposited GaN/TiN/Si(111) heterostructures by sequential TiN and liquid Ga laser ablation

    GaN/TiN heterostructures were deposited on 4° miscut Si(111) substrates by pulsed KrF laser ablation of TiN through vacuum, followed by reactive pulsed KrF laser ablation of liquid Ga through 70–75 mTorr of m...

    C.M. Rouleau, S. Kang, D.H. Lowndes in Applied Physics A (1999)

  12. No Access

    Article

    Amorphous Diamond Films Deposited by Pulsed-Laser Ablation: The Optimum Carbon-Ion Kinetic Energy and Effects of Laser Wavelength

    A systematic study has been made of changes in the bonding and optical properties of hydrogen-free tetrahedral amorphous carbon (ta-C) films, as a function of the kinetic energy of the incident carbon ions mea...

    Douglas H. Lowndes, Vladimir I. Merkulov, A. A. Puretzky… in MRS Online Proceedings Library (1998)

  13. No Access

    Article

    Effect of Ambient Gas Pressure on Pulsed Laser Ablation Plume Dynamics and ZnTe Film Growth

    Epitaxial thin films of nitrogen-doped p-ZnTe were grown on single-crystal, semi-insulating GaAs substrates via pulsed laser ablation of a stoichiometric ZnTe target. Both low pressure nitrogen ambients and hi...

    C. M. Rouleau, D. H. Lowndes, M. A. Strauss, S. Cao… in MRS Online Proceedings Library (1995)

  14. No Access

    Article

    Growth of Highly Doped P-Type Znte Films by Pulsed Laser ablation in Molecular Nitrogen

    In this paper the results on p-type ZnS, ZnSe, CdS and CdSe thin films grown by pulsed laser deposition will be discussed. these films were deposited on GaAs substrates. Li-do** has been shown to be effectiv...

    Douglas H. Lowndes, C. M. Rouleau, J. W. Mccamy… in MRS Online Proceedings Library (1995)

  15. No Access

    Article

    REAL-TIME in situ MONITORING OF DEFECT EVOLUTION AT WIDEGAP II-VI/GaAs HETEROINTERFACES DURING EPITAXIAL GROWTH

    We report the real-time in situ observation of heterointerface dislocation formation during the growth of lattice-mismatched widegap II-VI/GaAs heterostructures. Such observations were made by employing a near-no...

    C. M. Rouleau, R. M. Park in MRS Online Proceedings Library (1993)

  16. No Access

    Article

    Strain-free, ultra-high purity ZnSe layers grown by molecular beam epitaxy

    ZnSe layers have been grown by molecular beam epitaxy on high-purity, high-quality ZnSe wafers [(100) oriented] cut from ingots grown by the iodine vapor transport method. Photoluminescence (PL) analysis indic...

    R. M. Park, C. M. Rouleau, M. B. Troffer, T. Koyama… in Journal of Materials Research (1990)