256 citations · 352 across the 14 of their papers we have counts for
14 papers
Ultrafast Processes in Isomeric Pyrene-N-methylacetamides: Formation of Hydrogen Bond Induced Static Excimers with Varied Coupling Strength
Krishnayan Basuroy, Jose de J. Velazquez-Garcia, Darina Storozhuk +3
Pyrene based molecules are inclined to form excimers through self-association upon photoexcitation. In this work, the pyrene core is functionalized with N-methylacetamide group at…
Momentum-resolved surface enhanced Raman scattering from a nanowire-nanoparticle junction cavity
Adarsh B. Vasista, Shailendra K. Chaubey, David J. Gosztola +3
Herein we report experimental evidence of directional SERS from molecules situated inside a single nanowire-nanoparticle junction cavity. The emission was confined to a narrow rang…
Accelerating ultrafast spectroscopy with compressive sensing
Sushovit Adhikari, Cristian L. Cortes, Xiewen Wen +5
Ultrafast spectroscopy is an important tool for studying photoinduced dynamical processes in atoms, molecules, and nanostructures. Typically, the time to perform these experiments…
The effect of periodic spatial perturbations on the emission rates of quantum dots near graphene platforms
X. Miao, D. J. Gosztola, X. Ma +3
Quenching of fluorescence (FL) at the vicinity of conductive surfaces, and in particular, near a 2-D graphene layer has become an important biochemical sensing tool. The quenching…
Ultrafast Studies of Hot-Hole Dynamics in Au/p-GaN Heterostructures
Giulia Tagliabue, Joseph S. DuChene, Mohamed Abdellah +9
Harvesting non-equilibrium hot carriers from photo-excited metal nanoparticles has enabled plasmon-driven photochemical transformations and tunable photodetection with resonant nan…
Transfer of Graphene with Protective Oxide Layers
H. Grebel, L. Stan, A. V. Sumant +4
Transfer of graphene, grown by Chemical Vapor Deposition (CVD), to a substrate of choice, typically involves deposition of a polymeric layer (typically, poly(methyl methacrylate, P…
Life-time and line-width of individual quantum dots interfaced with graphene
Xin Miao, David J. Gosztola, Anirudha V. Sumant +1
We report on the luminescence's life-time and line-width from an array of individual quantum dots; these were interfaced with graphene surface guides or dispersed on a metal film.…
Confinement Effect Emission from Infiltrated ZnO in PS-b-PMMA Nanostructures
Paris L. Blaisdell-Pijuan, David J. Gosztola, Angel Yanguas-Gil +5
We have characterized the growth of ZnO using sequential infiltration synthesis (SiS) on PS-b-PMMA block copolymers (BCP) of spherical and cylindrical sub-20nm morphologies and stu…
Graphene channels interfaced with an array of individual quantum dots
Xin Miao, Haim Grebel
Surface graphene guides were interfaced with an array of individual semiconductor quantum dots, whose position was commensurate with the optical guide modes. The surface guide serv…
Photon-Induced Selenium Vacancies in TiSe2
David B. Lioi, David J. Gosztola, Gary P. Wiederrecht +1
TiSe2 is a member of transition metal dichalcogenide family of layered van-der-Waals materials that exhibits some distinctive electronic and optical properties. Here, we perform Ra…
Femtosecond electron and x-ray source based on laser wakefield accelerator
Dmitri A. Oulianov, Yuelin Li, Robert A. Crowell +4
A terawatt tabletop laser wakefield acceleration source of relativistic electrons has been developed in our Terawatt Ultrafast High Field Facility (TUHFF). The preliminary results…
Ultrafast Pulse Radiolysis Using a Terawatt Laser Wakefield Accelerator
Dmitri A. Oulianov, Robert A. Crowell, David J. Gosztola +3
We report the first ultrafast pulse radiolysis transient absorption spectroscopy measurements from the Terawatt Ultrafast High Field Facility (TUHFF) at Argonne National Laboratory…
Efficient, rapid one-electron photooxidation of chemisorbed polyhydroxyl alcohols and carbohydrates by TiO2 nanoparticles in an aqueous solution
I. A. Shkrob, M. C. Sauer, D. Gosztola
Time-resolved transient absorption spectroscopy has been used to study nanosecond and sub-microsecond electron dynamics in aqueous anatase nanoparticles in the presence of hole sca…
Recombination of Geminate (OH,eaq-) Pairs in Concentrated Alkaline Solutions: Lack of Evidence For Hydroxyl Radical Deprotonation
Rui Lian, Robert A. Crowell, Ilya A. Shkrob +3
Picosecond dynamics of hydrated electrons and hydroxyl radicals generated in 200 nm photodissociation of aqueous hydroxide and 400 nm (3-photon) ionization of water in concentrated…