Browsing by Author "0000 0000 4239 3958 (Chabal, YJ)"
Now showing items 1-14 of 14
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Characterization of Ru Thin-Film Conductivity upon Atomic Layer Deposition on H-Passivated Si(111)
Roodenko, Ecatherina (Katy); Park, S. K.; Kwon, Jinhee; Wielunski, L.; Chabal, Yves J.The sheet resistance measured by a four-probe technique is compared to the resistivity data derived from the optical response of thin ruthenium films grown on hydrogen-passivated Si(111) surfaces by atomic-layer deposition ... -
Colored Porous Silicon as Support for Plasmonic Nanoparticles
Lublow, M.; Kubala, S.; Veyan, Jean-Francois; Chabal, Yves J.Colored nanoporous silicon thin films were employed as dielectric spacing layers for the enhancement of localized surface plasmon (LSP) polaritons. Upon formation of Au nanoparticles (Au-NPs) on these layers, a visible ... -
Design Approaches for Enhancing Photovoltaic Performance of Silicon Solar Cells Sensitized by Proximal Nanocrystalline Quantum Dots
Shafiq, Natis (2017-07-24)Energy transfer (ET) based sensitization of silicon (Si) using proximal nanocrystal quantum dots (NQDs) has been studied extensively in recent years as a means to develop thin and flexible Si based solar cells. The driving ... -
Diffusion of Small Molecules in Metal Organic Framework Materials
Canepa, Pieremanuele; Nijem, Nour; Chabal, Yves J.; Thonhauser, T.Ab initio simulations are combined with in situ infrared spectroscopy to unveil the molecular transport of H-2, CO2, and H2O in the metal organic framework MOF-74-Mg. Our study uncovers-at the atomistic level-the major ... -
Effective Sensing of RDX via Instant and Selective Detection of Ketone Vapors
Hu, Zhichao; Tan, Kui; Lustig, William P.; Wang, Hao; Zhao, Yonggang; Zheng, Chong; Banerjee, Debasis; Emge, Thomas J.; Chabal, Yves J.; Li, JingTwo new luminescent metal-organic frameworks (LMOFs) were synthesized and examined for use as sensory materials. Very fast and effective sensing of RDX was achieved by vapor detection of a cyclic ketone used as a solvent ... -
Investigation of LiAlH 4-THF Formation by Direct Hydrogenation of Catalyzed Al and LiH
Lacina, D.; Yang, L.; Chopra, Irinder; Muckerman, J.; Chabal, Yves J.; Graetz, J.The formation of LiAlH 4-THF by direct hydrogenation of Al and LiH in tetrahydrofuran (THF) was investigated using spectroscopic and computational methods. The molecular structures and free energies of the various possible ... -
Lowering the Density of Electronic Defects on Organic-Functionalized Si(100) Surfaces
Peng, Weina; DeBenedetti, William J. I.; Kim, Seonjae; Hines, Melissa A.; Chabal, Yves J.The electrical quality of functionalized, oxide-free silicon surfaces is critical for chemical sensing, photovoltaics, and molecular electronics applications. In contrast to Si/SiO₂ interfaces, the density of interface ... -
Novel Binder-Free Electrode Materials for Supercapacitors Utilizing High Surface Area Carbon Nanofibers Derived from Immiscible Polymer Blends of PBI/6FDA-DAM:DABA
Abeykoon, Nimali C.; Garcia, Velia; Jayawickramage, Rangana A.; Perera, Wijayantha; Cure, Jeremy; Chabal, Yves J.; Balkus, Kenneth J.; Ferraris, John P. (Royal Society of Chemistry, 2018-06-01)Carbon nanofibers with high surface area have become promising electrode materials for supercapacitors because of their importance in increasing energy density. In this study, a high free volume polymer, 6FDA-DAM:DABA ... -
Selectivity of Metal Oxide Atomic Layer Deposition on Hydrogen Terminated and Oxidized Si(001)-(2x1) Surface
Longo, Roberto C.; McDonnell, Stephen; Dick, D.; Wallace, Robert M.; Chabal, Yves J.; Owen, James H. G.; Ballard, Josh B.; Randall, John N.; Cho, Kyeongjae (A V S Amer Inst Physics, 2014-02-10)In this work, the authors used density-functional theory methods and x-ray photoelectron spectroscopy to study the chemical composition and growth rate of HfO₂, Al₂O₃, and TiO₂ thin films grown by in-situ atomic layer ... -
Structure Matters: Correlating Temperature Dependent Electrical Transport Through Alkyl Monolayers With Vibrational And Photoelectron Spectroscopies
Shpaisman, Hagay; Seitz, Oliver; Yaffe, Omer; Roodenko, Ecatherina (Katy); Scheres, Luc; Zuilhof, Han; Chabal, Yves J.; Sueyoshi, Tomoki; Kera, Satoshi; Ueno, Nobuo; Vilan, Ayelet; Cahen, DavidFreezing out of molecular motion and increased molecular tilt enhance the efficiency of electron transport through alkyl chain monolayers that are directly chemically bound to oxide-free Si. As a result, the current across ... -
Thermal Atomic Layer Etching of Silica and Alumina Thin Films Using Trimethylaluminum with Hydrogen Fluoride or Fluoroform
Rahman, Razwanur; Mattson, Eric C.; Klesko, Joseph P.; Dangerfield, Aaron; Rivillon-Amy, S.; Smith, D. C.; Hausmann, D.; Chabal, Yves J.Thermal atomic layer etching (ALE) is an emerging technique that involves the sequential removal of monolayers of a film by alternating self-limiting reactions, some of which generate volatile products. Although traditional ... -
Understanding and Controlling Water Stability of MOF-74
Zuluaga, S.; Fuentes-Fernandez, Erika M. A.; Tan, Kui; Xu, F.; Li, J.; Chabal, Yves J.; Thonhauser, T. (Royal Society of Chemistry, 2018-06-01)Metal organic framework (MOF) materials in general, and MOF-74 in particular, have promising properties for many technologically important processes. However, their instability under humid conditions severely restricts ... -
Water Interactions In Metal Organic Frameworks
Tan, Kui; Nijem, Nour; Gao, Yuzhi; Zuluaga, S.; Li, J.; Thonhauser, T.; Chabal, Yves J.Metal organic frameworks (MOFs) have a strong potential for gas adsorption and separation such as H2 and CH4 storage, and CO2 capture. However, their instability in the presence of water vapor (many MOFs are hygroscopic) ... -
Wet chemical surface functionalization of oxide-free silicon
Thissen, Peter; Seitz, Oliver; Chabal, Yves J. (Elsevier Limited, 2012-09-13)Silicon is by far the most important semiconductor material in the microelectronic industry mostly due to the high quality of the Si/SiO2 interface. Consequently, applications requiring chemical functionalization of Si ...