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14 papers
Role of Pressure in the Growth of Hexagonal Boron Nitride Thin Films from Ammonia-Borane
Justin C. Koepke, Joshua D. Wood, Enrique A. Carrion +14
We analyze the optical, chemical, and electrical properties of chemical vapor deposition (CVD) grown hexagonal boron nitride (h-BN) using the precursor ammonia-borane ()…
Covalent Functionalization and Passivation of Exfoliated Black Phosphorus via Aryl Diazonium Chemistry
Christopher R. Ryder, Joshua D. Wood, Spencer A. Wells +5
Functionalization of atomically thin nanomaterials enables the tailoring of their chemical, optical, and electronic properties. Exfoliated black phosphorus, a layered two-dimension…
Stable Aqueous Dispersions of Optically and Electronically Active Phosphorene
Joohoon Kang, Spencer A. Wells, Joshua D. Wood +7
Understanding and exploiting the remarkable optical and electronic properties of phosphorene require mass production methods that avoid chemical degradation. While solution-based s…
Chemically Tailoring Semiconducting Two-Dimensional Transition Metal Dichalcogenides and Black Phosphorus
Christopher R. Ryder, Joshua D. Wood, Spencer A. Wells +1
Two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDCs) and black phosphorus (BP) have beneficial electronic, optical, and physical properties at the few-layer…
Anisotropic Thermal Conductivity of Exfoliated Black Phosphorus
Hyejin Jang, Joshua D. Wood, Christopher R. Ryder +2
We ascertain the anisotropic thermal conductivity of alumina passivated black phosphorus (BP), a reactive 2D nanomaterial with strong in-plane anisotropy. We measure the room tempe…
Graphene-Based Platform for Infrared Near-Field Nanospectroscopy of Water and Biological Materials in an Aqueous Environment
Omar Khatib, Joshua D. Wood, Alexander S. McLeod +12
Scattering scanning near-field optical microscopy (s-SNOM) has emerged as a powerful nanoscale spectroscopic tool capable of characterizing individual biomacromolecules and molecul…
Preserving the 7x7 surface reconstruction of clean Si(111) by graphene adsorption
Justin C. Koepke, Joshua D. Wood, Cedric M. Horvath +2
We employ room-temperature ultrahigh vacuum scanning tunneling microscopy (UHV STM) and {\em ab-initio} calculations to study graphene flakes that were adsorbed onto the Si(111)…
Solvent Exfoliation of Electronic-Grade, Two-Dimensional Black Phosphorus
Joohoon Kang, Joshua D. Wood, Spencer A. Wells +4
Solution dispersions of two-dimensional (2D) black phosphorus (BP), often referred to as phosphorene, are achieved by solvent exfoliation. These pristine, electronic-grade BP dispe…
In Situ Thermal Decomposition of Exfoliated Two-Dimensional Black Phosphorus
Xiaolong Liu, Joshua D. Wood, Kan-Sheng Chen +2
With a semiconducting band gap and high charge carrier mobility, two-dimensional (2D) black phosphorus (BP), often referred to as phosphorene, holds significant promise for next ge…
Annealing Free, Clean Graphene Transfer using Alternative Polymer Scaffolds
Joshua D. Wood, Gregory P. Doidge, Enrique A. Carrion +11
We examine the transfer of graphene grown by chemical vapor deposition (CVD) with polymer scaffolds of poly(methyl methacrylate) (PMMA), poly(lactic acid) (PLA), poly(phthalaldehyd…
Effective Passivation of Exfoliated Black Phosphorus Transistors against Ambient Degradation
Joshua D. Wood, Spencer A. Wells, Deep Jariwala +7
Unencapsulated, exfoliated black phosphorus (BP) flakes are found to chemically degrade upon exposure to ambient conditions. Atomic force microscopy, electrostatic force microscopy…
Influence of Stoichiometry on the Optical and Electrical Properties of Chemical Vapor Deposition Derived MoS
In Soo Kim, Vinod K. Sangwan, Deep Jariwala +11
Ultrathin transition metal dichalcogenides (TMDCs) of Mo and W show great potential for digital electronics and optoelectronic applications. Whereas early studies were limited to m…
Scanning Tunneling Microscopy Study and Nanomanipulation of Graphene-Coated Water on Mica
Kevin T. He, Joshua D. Wood, Gregory P. Doidge +2
We study interfacial water trapped between a sheet of graphene and a muscovite (mica) surface using Raman spectroscopy and ultra-high vacuum scanning tunneling microscopy (UHV-STM)…
Matrix multiplication using quantum-dot cellular automata to implement conventional microelectronics
Joshua D. Wood, P. Douglas Tougaw
Quantum-dot cellular automata (QCA) shows promise as a post silicon CMOS, low power computational technology. Nevertheless, to generalize QCA for next-generation digital devices, t…