Now showing items 16-30 of 30

    • 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 ...
    • Nucleation and Growth of WSe₂: Enabling Large Grain Transition Metal Dichalcogenides 

      Yue, Ruoyu; Nie, Yifan; Walsh, Lee A.; Addou, Rafik; Liang, Chaoping; Lu, Ning; Barton, Adam T.; Zhu, Hui; Che, Zifan; Barrera, Diego; Cheng, Lanxia; Cha, Pil-Ryung; Chabal, Yves J.; Hsu, Julia W. P.; Kim, Jiyoung; Kim, Moon J.; Colombo, Luigi; Wallace, Robert M.; Cho, Kyeongjae; Hinkle, Christopher L. (IOP Publishing Ltd, 2017-09-22)
      The limited grain size (< 200 nm) for transition metal dichalcogenides (TMDs) grown by molecular beam epitaxy (MBE) reported in the literature thus far is unsuitable for high-performance device applications. In this work, ...
    • Role of Excess Ligand and Effect of Thermal Treatment in Hybrid Inorganic-Organic EUV Resists 

      Mattson, Eric C.; Rupich, S. M.; Cabrera, Y.; Chabal, Yves J.
      The chemical structure and thermal reactivity of recently discovered inorganic-organic hybrid resist materials are characterized using a combination of in situ and ex situ infrared (IR) spectroscopy and X-ray photoemission ...
    • 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 ...
    • Static and Dynamic Electronic Characterization of Organic Monolayers Grafted on a Silicon Surface 

      Pluchery, O.; Zhang, Y.; Benbalagh, R.; Caillard, Louis; Gallet, J. J.; Bournel, F.; Lamic-Humblot, A.; Salmeron, M.; Chabal, Yves J.; Rochet, F.
      Organic layers chemically grafted on silicon offer excellent interfaces that may open up the way for new organic-inorganic hybrid nanoelectronic devices. However, technological achievements rely on the precise electronic ...
    • Structural Band-Gap Tuning in g-C₃N₄ 

      Zuluaga, S.; Liu, Li-Hong; Shafiq, Natis; Rupich, Sara M.; Veyan, Jean-François; Chabal, Yves J.; Thonhauser, T.
      g-C₃N₄ is a promising material for hydrogen production from water via photo-catalysis, if we can tune its band gap to desirable levels. Using a combined experimental and ab initio approach, we uncover an almost perfectly ...
    • Structural Band-Gap Tuning in g-C₃N₄ 

      Zuluaga, S.; Liu, Li-Hong; Shafiq, Natis; Rupich, Sara M.; Veyan, Jean-François; Chabal, Yves J.; Thonhauser, T.
      g-C3N4 is a promising material for hydrogen production from water via photo-catalysis, if we can tune its band gap to desirable levels. Using a combined experimental and ab initio approach, we uncover an almost perfectly ...
    • Structural, Elastic, Thermal, and Electronic Responses of Small-Molecule-Loaded Metal-Organic Framework Materials 

      Canepa, Pieremanuele; Tan, Kui; Du, Yingjie; Lu, Hongbing; Chabal, Yves J.; Thonhauser, Timo
      We combine infrared spectroscopy, nano-indentation measurements, and ab initio simulations to study the evolution of structural, elastic, thermal, and electronic responses of the metal-organic framework MOF-74-Zn when ...
    • 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, David
      Freezing 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 ...
    • Substrate Selectivity in the Low Temperature Atomic Layer Deposition of Cobalt Metal Films from Bis(1,4-Di- Tert -Butyl-1,3-Diazadienyl)Cobalt and Formic Acid 

      Kerrigan, M. M.; Klesko, Joseph P.; Rupich, Sara M.; Dezelah, C. L.; Kanjolia, R. K.; Chabal, Yves. J.; Winter, C. H. (American Institute of Physics Inc, 2018-08-20)
      The initial stages of cobalt metal growth by atomic layer deposition are described using the precursors bis(1,4-di-tert-butyl-1,3-diazadienyl)cobalt and formic acid. Ruthenium, platinum, copper, Si(100), Si-H, SiO₂, and ...
    • 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 ...
    • Topologically Guided Tuning of Zr-MOF Pore Structures for Highly Selective Separation of C6 Alkane Isomers 

      Wang, Hao; Dong, Xinglong; Lin, Junzhong; Teat, Simon J.; Jensen, Stephanie; Cure, Jeremy; Alexandrov, Eugeny V.; Xia, Qibin; Tan, Kui; Wang, Qining; Olson, David H.; Proserpio, Davide M.; Chabal, Yves J.; Thonhauser, Timo; Sun, Junliang; Han, Yu; Li, Jing
      As an alternative technology to energy intensive distillations, adsorptive separation by porous solids offers lower energy cost and higher efficiency. Herein we report a topology-directed design and synthesis of a series ...
    • 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 ...