New UT Austin site:
https://sites.utexas.edu/warner
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https://drjhwarner.wixsite.com/warnergroup
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https://twitter.com/JamieHWarner
Research Group Summary.
Professor Jamie Warner's group has moved to the Cockrell School of Engineering at the University of Texas at Austin. He is an academic visitor in the Department of Materials at Oxford University. His group studies the next generation of nanostructured materials with unique properties that will impact electronic, opto-electronic, and energy applications. Particular focus is made to the atomic level structure and dynamics of nanomaterials probed by aberration-corrected transmission electron microscopy and spectroscopy. A wide range of nanoscale characterization tools (TEM, SEM, AFM, FIB) are used to probe materials across all dimension scales. New types of nanoscale devices are produced in clean-room nanofabrication facilities, utilizing materials ranging from 2D Crystals (graphene, BN, MoS2, WS2 etc), 1D wires and nanotubes, to 0D quantum dots.
The group is multi-disciplinary and collaborates extensively with a wide range of scientists within USA, and internationally.
Both fundamental and applied research is undertaken in the following areas of Nanostructured Materials:
-Aberration-corrected transmission electron microscopy and spectroscopy.
-Synthesis, chemical functionalization, processing, self-assembly and purification.
-Optical spectroscopy (Photoluminescence, Absorption and Raman).
-Electronic and opto-electronic device fabrication and characterization.
Latest Publications (as corresponding author)
Research article on Striated 2D Lattice with Sub‐nm 1D Etch Channels by Controlled Thermally Induced Phase Transformations of PdSe2 has been published in Advanced Materials, (2019)
Research article on Simultaneous Identification of Low and High Atomic Number Atoms in Monolayer 2D Materials Using 4D Scanning Transmission Electron Microscopy has been published in Nano Letters, (2019)
Research article on Atomic Structure and Dynamics of Defects and Grain Boundaries in 2D Pd2Se3 Monolayers has been published in ACS Nano, (2019)
Research article on Atomically Sharp Dual Grain Boundaries in 2D WS2 Bilayers has been published in Small, (2019)
Research article on Postgrowth Substitutional Tin Doping of 2D WS2 Crystals Using Chemical Vapor Deposition has been published in ACS Applied Materials and Interfaces, (2019)
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Research article on Increasing the electrochemical activity of basal plane sites in porous 3D edge rich MoS2 thin films for the hydrogen evolution reaction has been published in Materials Today Energy, (2019)
Research article on Anisotropic Fracture Dynamics Due to Local Lattice Distortions has been published in ACS Nano, (2019)
Research article on Metal Atom Markers for Imaging Epitaxial Molecular Self-Assembly on Graphene by Scanning Transmission Electron Microscopy has been published in ACS Nano, (2019)
Research article on Atomic structural catalogue of defects and vertical stacking in 2H/3R mixed polytype multilayer WS2 pyramids has been published in Nanoscale, (2019)
Research article on Atomic electrostatic maps of 1D channels in 2D semiconductors using 4D scanning transmission electron microscopy has been published in Nature Communications, (2019)
Research article on High-Performance WS2 Monolayer Light-Emitting Tunneling Devices Using 2D Materials Grown by Chemical Vapor Deposition has been published in ACS Nano, (2019)
Research article on In situ high temperature atomic level dynamics of large inversion domain formations in monolayer MoS2 has been published in Nanoscale, (2019)
Research article on Grain Boundaries as Electrical Conduction Channels in Polycrystalline Monolayer WS2 has been published in ACS Applied Materials and Interfaces, (2019)
Research article on Synthesis of Surface Grown Pt Nanoparticles on Edge-Enriched MoS2 Porous Thin Films for Enhancing Electrochemical Performance has been published in Chemistry of Materials, (2019)
Research article on Atomic Scale Imaging of Reversible Ring Cyclization in Graphene Nanoconstrictions has been published in ACS Nano, (2019)
Research article on High Photoresponsivity in Ultrathin 2D Lateral Graphene:WS2:Graphene Photodetectors Using Direct CVD Growth has been published in ACS Applied Materials and Interfaces, (2019)
Research article on Self-Limiting Growth of High-Quality 2D Monolayer MoS2 by Direct Sulfurization Using Precursor-Soluble Substrates for Advanced Field-Effect Transistors and Photodetectors has been published in ACS Applied Nano Materials , (2019)
Research article on Symmetry-Controlled Reversible Photovoltaic Current Flow in Ultrathin All 2D Vertically Stacked Graphene/MoS2/WS2/Graphene Devices has been published in ACS Applied Materials and Interfaces, (2019)
Research article on Atomic Structure and Dynamics of Self-Limiting Sub-Nanometer Pores in Monolayer WS2 has been published in ACS Nano, (2018)
Research article on In Situ Atomic-Level Studies of Gd Atom Release and Migration on Graphene from a Metallofullerene Precursor has been published in ACS Nano, (2018)
%Research article on Ultralong 1D Vacancy Channels for Rapid Atomic Migration during 2D Void Formation in Monolayer MoS2 has been published in ACS Nano, (2018)
Ultralong 1D Vacancy Channels for Rapid Atomic Migration during 2D Void Formation in Monolayer MoS2
Review article on Atomic structure of defects and dopants in 2D layered transition metal dichalcogenides has been published in Chemical Society Reviews, (2018)
Research on Preferential Pt Nanocluster Seeding at Grain Boundary Dislocations in Polycrystalline Monolayer MoS2 has been published in ACS Nano, (2018)
Research on Atomically sharp interlayer stacking shifts at anti-phase grain boundaries in overlapping MoS2 secondary layers '' has been published in Nanoscale, (2018)
Research on Chemical Vapor Deposition Growth of Two-Dimensional Monolayer Gallium Sulfide Crystals Using Hydrogen Reduction of Ga2S3 has been published in ACS Omega, (2018)
Research on Utilizing Interlayer Excitons in Bilayer WS2 for Increased Photovoltaic Response in Ultrathin Graphene Vertical Cross-Bar Photodetecting Tunneling Transistors has been published in ACS Nano, (2018)
Research on High-Performance All 2D-Layered Tin Disulfide: Graphene Photodetecting Transistors with Thickness-Controlled Interface Dynamics has been published in ACS Applied Materials and Interfaces, (2018)
Research on Interlocking Friction Governs the Mechanical Fracture of Bilayer MoS2 has been published in ACS Nano, (2018)
Research on Hydrogen-Assisted Growth of Large-Area Continuous Films of MoS2 on Monolayer Graphene has been published in ACS Applied Materials and Interfaces, (2018)
Research on Determining the Optimized Interlayer Separation Distance in Vertical Stacked 2D WS2:hBN:MoS2 Heterostructures for Exciton Energy Transfer has been published in Small, (2018)
Research on Atomic Resolution Imaging of Nanoscale Chemical Expansion in PrxCe1-xO2-δ During In Situ Heating has been published in ACS Nano, (2018)
Research on Large Dendritic Monolayer MoS2 Grown by Atmospheric Pressure Chemical Vapor Deposition for Electrocatalysis has been published in ACS Applied Materials and Interfaces, (2018)
Research on Lateral Graphene-Contacted Vertically Stacked WS2/MoS2 Hybrid Photodetectors with Large Gain has been published in Advanced Materials, (2017)
Research on Point defects in turbostratic stacked bilayer graphene has been published in Nanoscale, (2017)
Research on Electrical Breakdown of Suspended Mono- and Few-Layer Tungsten Disulfide via Sulfur Depletion Identified by in Situ Atomic Imaging has been published in ACS Nano, (2017)
Research on Orientation dependent interlayer stacking structure in bilayer MoS2 domains has been published in Nanoscale, (2017)
Research on In Situ Atomic-Scale Studies of the Formation of Epitaxial Pt Nanocrystals on Monolayer Molybdenum Disulfide has been published in ACS Nano, (2017)
Research on Atomically Flat Zigzag Edges in Monolayer MoS2 by Thermal Annealing has been published in Nano Letters, (2017)
Research on Growth of Large Single-Crystalline Monolayer Hexagonal Boron Nitride by Oxide-Assisted Chemical Vapor Deposition has been published in Chemistry of Materials, (2017)
Research on Atomic Structure and Dynamics of Defects in 2D MoS2 Bilayers has been published in ACS Omega, (2017)
Research on Epitaxial Templating of Two-Dimensional Metal Chloride Nanocrystals on Monolayer Molybdenum Disulfide has been published in ACS Nano, (2017)
Research on Three dimensional hybrid multi-layered graphene–CNT catalyst supports via rapid thermal annealing of nickel acetate has been published in Journal of Materials Chemistry A, (2017)
Research on Hydrogen Addition for Centimeter-Sized Monolayer Tungsten Disulfide Continuous Films by Ambient Pressure Chemical Vapor Deposition has been published in Chemistry of Materials, (2017)
Research on Photoluminescence Segmentation within Individual Hexagonal Monolayer Tungsten Disulfide Domains Grown by Chemical Vapor Deposition has been published in ACS Applied Materials and Interfaces, (2017)
Research on Atomic structure and formation mechanism of sub-nanometer pores in 2D monolayer MoS2 has been published in Nanoscale, (2017)
Research on Atomic Structure and Dynamics of Single Platinum Atom Interactions with Monolayer MoS2 has been published in ACS Nano, (2017)
Research on Edge-Enriched 2D MoS2 Thin Films Grown by Chemical Vapor Deposition for Enhanced Catalytic Performance has been published in ACS Catalysis, (2017)
Research on Negative Electro-conductance in Suspended 2D WS2 Nanoscale Devices has been published in ACS Applied Materials and Interfaces, (2016)
Research on Atomic Structure and Dynamics of Epitaxial 2D Crystalline Gold on Graphene at Elevated Temperatures has been published in ACS Nano, (2016)
Research on Atomic Structure and Spectroscopy of Single Metal (Cr, V) Substitutional Dopants in Monolayer MoS2 has been published in ACS Nano, (2016)
Research on Atomically Sharp Crack Tips in Monolayer MoS2 and Their Enhanced Toughness by Vacancy Defects has been published in ACS Nano, (2016)
Research on In Situ High Temperature Atomic Level Studies of Large Closed Grain Boundary Loops in Graphene has been published in ACS Nano, (2016)
Research on In Situ Atomic Level Dynamics of Heterogeneous Nucleation and Growth of Graphene from Inorganic Nanoparticle Seeds has been published in ACS Nano, (2016)
Research on Ultrathin 2D Photodetectors Utilizing Chemical Vapor Deposition Grown WS2 With Graphene Electrodes has been published in ACS Nano, (2016)
Research on Oligomeric aminoborane precursors for the chemical vapour deposition growth of few-layer hexagonal boron nitride has been published in CrystEngComm, (2016)
Research on Photoinduced Schottky Barrier Lowering in 2D Monolayer WS2 Photodetectors has been published in Advanced Optical Materials, (2016)
Research on Revealing Defect-State Photoluminescence in Monolayer WS2 by Cryogenic Laser Processing has been published in ACS Nano, (2016)
Research on Detailed Atomic Reconstruction of Extended Line Defects in Monolayer MoS2 has been published in ACS Nano, (2016)
Research on Torsional Deformations in Subnanometer MoS Interconnecting Wires has been published in Nano Letters, (2016)
Research on Substrate control for large area continuous films of monolayer MoS2 by atmospheric pressure chemical vapor deposition has been published in Nanotechnology, (2016)
Research on Biexciton formation in bilayer WS2 has been published in ACS Nano, (2016)
Research on Mixed multilayered vertical heterostructures utilizing strained monolayer WS2 has been published in Nanoscale, (2016)
Research on Doping Graphene Transistors Using Vertical Stacked Monolayer WS2 Heterostructures Grown by Chemical Vapor Deposition has been published in ACS Applied Materials and Interfaces, (2016)
Research on Electroluminescence Dynamics across Grain Boundary Regions of Monolayer Tungsten Disulfide has been published in ACS Nano, (2015) ]
Research on Elongated Silicon–Carbon Bonds at Graphene Edges has been published in ACS Nano, (2015)
Research on Atomic Structure of Graphene Subnanometer Pores has been published in ACS Nano, (2015)
Featured in ACS Nano Podcast Episode 101: ACS Nano December 2015
Research on Thermally Induced Dynamics of Dislocations in Graphene at Atomic Resolution has been published in ACS Nano, (2015)
Research on Partial Dislocations in Graphene and Their Atomic Level Migration Dynamics has been published in Nano Letters, (2015)
Research on Uniformity of large-area bilayer graphene grown by chemical vapor deposition has been published in Nanotechnology, (2015)
Research on Rotating Anisotropic Crystalline Silicon Nanoclusters in Graphene has been published in ACS Nano, (2015)
Research on Atomic Level Distributed Strain within Graphene Divacancies from Bond Rotations has been published in ACS Nano, (2015)
Research on Controlled Formation of Closed Edge Nanopores in Graphene has been published in Nanoscale, (2015)
Research on Resilient High Catalytic Performance of Platinum Nanocatalysts with Porous Graphene Envelope has been published in ACS Nano, (2015)
Research Highlights section of the July 2015 issue of Nature Nanotechnology.
http://nanotechweb.org/cws/article/tech/61502
This was selected as the Front Cover of ACS Nano
Research on Controlled Preferential Oxidation of Grain Boundaries in Monolayer Tungsten Disulfide for Direct Optical Imaging has been published in ACS Nano, (2015) -
Research on All Chemical Vapour Deposition Growth of MoS2:h-BN Vertical Heterostructures has been published in ACS Nano, (2015) -
Research on Temperature Dependence of the Reconstruction of Zigzag Edges in Graphene has been published in ACS Nano, (2015)
Research on Layer-Dependent Modulation of Tungsten Disulfide Photoluminescence by Lateral Electric Field. has been published in ACS Nano, (2015)
A review article on Two-dimensional materials under electron irradiation. has been published in MRS Bulletin, (2015)
This is part of the Frontiers of in situ electron microscopy edition
Research on Spatially Dependent Lattice Deformations for Dislocations at the Edges of Graphene has been published in ACS Nano, (2015)
Perspective Article on Wired Up: Interconnecting Two-Dimensional Materials with One-Dimensional Atomic Chains has been published in ACS Nano, (2014) -
Research on Extended Klein Edges in Graphene has been published in ACS Nano, (2014) -
Research on Stability and Spectroscopy of Single Nitrogen Dopants in Graphene at Elevated Temperatures has been published in ACS Nano, (2014) -
Research on Shape Evolution of MoS2 Crystals Grown by Chemical Vapour Deposition has been published in Chemistry of Materials, (2014)
Research on Detailed Formation Processes of Stable Dislocations in Graphene has been published in Nanoscale, (2014)
Research on Atomic Level Spatial Variations of Energy States along Graphene Edges has been published in Nano Letters, (2014)
Research on Controlling sulphur precursor addition for large single crystal domains of WS2 has been published in Nanoscale,(2014)
Research on Crack-Free Growth and Transfer of Continuous Monolayer Graphene Grown on Melted Copper has been published in Chemistry of Materials,(2014)
Research on The Role of the Bridging Atom in Stabilizing Odd Numbered Graphene Vacancies has been published in Nano Letters, (2014)
Research on Atomic Structure and Dynamics of Metal Dopant Pairs in Graphene has been published in Nano Letters, (2014)
Research on Stability and Dynamics of the Tetravacancy in Graphene has been published in Nano Letters, (2014)
Research on Hydrogen-Free Graphene Edges has been published in Nature Communications, (2014)
Research on Inflating Graphene with Atomic-Scale Blisters has been published in Nano Letters, (2014)
Research on PbTe Nanocrystal Arrays on Graphene and the Structural Influence of Capping Ligands has been published in Chemistry of Materials, (2014)
Front Cover of Chemistry of Materials Journal
Research on Optically Enhanced Charge Transfer Between C60 and Single-Wall Carbon Nanotubes in Hybrid Electronic Devices has been published in Nanoscale, (2014)