David Geohegan Facility User, Center for Nanophase Materials Sciences Contact GEOHEGANDB@ORNL.GOV All Publications Cooperative Behavior in the Evolution of Alignment and Structure in Vertically Aligned Carbon-Nanotube Arrays Grown using Che... Ultrafast Spectral Dynamics of CsPb(Br x Cl 1– x ) 3 Mixed-Halide Nanocrystals Photocarrier Transfer across Monolayer MoS2–MoSe2 Lateral Heterojunctions In situ edge engineering in two-dimensional transition metal dichalcogenides Anomalous interlayer vibrations in strongly coupled layered PdSe2... Real‐Time Observation of Order‐Disorder Transformation of Organic Cations Induced Phase Transition and Anomalous Photolum... The growth and assembly of organic molecules and inorganic 2D materials on graphene for van der Waals heterostructures In situ edge engineering in two-dimensional transition metal dichalcogenides A hybrid optimization algorithm to explore atomic configurations of TiO2 nanoparticles Real‐Time Observation of Order‐Disorder Transformation of Organic Cations Induced Phase Transition and Anomalous Photoluminescence in Hybrid Perovskites In Situ X-Ray Studies of Crystallization Kinetics and Ordering in Functional Organic and Hybrid Materials Bottom up synthesis of boron-doped graphene for stable intermediate temperature fuel cell electrodes PdSe 2 : Pentagonal Two-Dimensional Layers with High Air Stability for Electronics PdSe2: Pentagonal 2D Layers with High Air Stability for Electronics Bromine substitution improves excited-state dynamics in mesoporous mixed halide perovskite films Enhancing Ion Migration in Grain Boundaries of Hybrid Organic-Inorganic Perovskites by Chlorine Suppression of Defects and Deep Levels Using Isoelectronic Tungsten Substitution in Monolayer MoSe2... Perovskite Materials: Solar Cell and Optoelectronic Applications Ultrafast Excited-State Dynamics in Shape- and Composition-Controlled Gold-Silver Bimetallic Nanostructures ... Enhancing Ion Migration in Grain Boundaries of Hybrid Organic–Inorganic Perovskites by Chlorine Edge-controlled Growth and Etching of Two-Dimensional GaSe Monolayers... PdSe2: Pentagonal Two-Dimensional Layers with High Air Stability for Electronics Tilt Grain Boundary Topology Induced by Substrate Topography Ultrafast Carrier Dynamics in Bimetallic Nanostructures-Enhanced Methylammonium Lead Bromide Perovskites Nanostructured carbon electrocatalyst supports for intermediate-temperature fuel cells: Single-walled versus multi-walled structures Pagination First page « First Previous page ‹‹ … Page 2 Current page 3 Page 4 … Next page ›› Last page Last » Key Links Curriculum Vitae Google Scholar ORCID Organizations Physical Sciences Directorate User Facilities Center for Nanophase Materials Sciences