title: Materials Properties and Solvated Electron Dynamics of Isolated Nanoparticles and Nanodroplets Probed with Ultrafast Extreme Ultraviolet Beams.
abstract: We present ultrafast photoemission measurements of isolated nanoparticles in vacuum using extreme ultraviolet (EUV) light produced through high harmonic generation. Surface-selective static EUV photoemission measurements were performed on nanoparticles with a wide array of compositions, ranging from ionic crystals to nanodroplets of organic material. We find that the total photoelectron yield varies greatly with nanoparticle composition and provides insight into material properties such as the electron mean free path and effective mass. Additionally, we conduct time-resolved photoelectron yield measurements of isolated oleylamine nanodroplets, observing that EUV photons can create solvated electrons in liquid nanodroplets. Using photoemission from a time-delayed 790 nm pulse, we observe that a solvated electron is produced in an excited state and subsequently relaxes to its ground state with a lifetime of 151 ± 31 fs. This work demonstrates that femotosecond EUV photoemission is a versatile surface-sensitive probe of the properties and ultrafast dynamics of isolated nanoparticles.
authors.affiliation: JILA-NIST and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309, United States.
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Ellis
authors.affiliation: JILA-NIST and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309, United States.
authors.forename: Daniel D
authors.initials: DD
authors.lastname: Hickstein
authors.affiliation: JILA-NIST and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309, United States.|Department of Chemistry and Biochemistry, University of California San Diego , La Jolla, California 92093, United States.
authors.forename: Wei
authors.initials: W
authors.lastname: Xiong
authors.affiliation: JILA-NIST and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309, United States.
authors.forename: Franklin
authors.initials: F
authors.lastname: Dollar
authors.affiliation: CIRES and Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Brett B
authors.initials: BB
authors.lastname: Palm
authors.affiliation: JILA-NIST and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309, United States.
authors.forename: K Ellen
authors.initials: KE
authors.lastname: Keister
authors.affiliation: JILA-NIST and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309, United States.
authors.forename: Kevin M
authors.initials: KM
authors.lastname: Dorney
authors.affiliation: JILA-NIST and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309, United States.
authors.forename: Chengyuan
authors.initials: C
authors.lastname: Ding
authors.affiliation: JILA-NIST and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309, United States.
authors.forename: Tingting
authors.initials: T
authors.lastname: Fan
authors.affiliation: Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Molly B
authors.initials: MB
authors.lastname: Wilker
authors.affiliation: Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Kyle J
authors.initials: KJ
authors.lastname: Schnitzenbaumer
authors.affiliation: Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Gordana
authors.initials: G
authors.lastname: Dukovic
authors.affiliation: CIRES and Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Jose L
authors.initials: JL
authors.lastname: Jimenez
authors.affiliation: JILA-NIST and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309, United States.
authors.forename: Henry C
authors.initials: HC
authors.lastname: Kapteyn
authors.affiliation: JILA-NIST and Department of Physics, University of Colorado , 440 UCB, Boulder, Colorado 80309, United States.
authors.forename: Margaret M
authors.initials: MM
authors.lastname: Murnane
mesh_terms: D004583:Electrons; D053758:Nanoparticles; D013499:Surface Properties; D014466:Ultraviolet Rays