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  1. Article ; Online: Radial Dopant Placement for Tuning Plasmonic Properties in Metal Oxide Nanocrystals.

    Crockett, Brandon M / Jansons, Adam W / Koskela, Kristopher M / Johnson, Darren W / Hutchison, James E

    ACS nano

    2017  Volume 11, Issue 8, Page(s) 7719–7728

    Abstract: Doped metal oxide nanocrystals that exhibit tunable localized surface plasmon resonances (LSPRs) represent an intriguing class of nanomaterials that show promise for a variety of applications from spectroscopy to sensing. LSPRs arise in these materials ... ...

    Abstract Doped metal oxide nanocrystals that exhibit tunable localized surface plasmon resonances (LSPRs) represent an intriguing class of nanomaterials that show promise for a variety of applications from spectroscopy to sensing. LSPRs arise in these materials through the introduction of aliovalent dopants and lattice oxygen vacancies. Tuning the LSPR shape and energy is generally accomplished through controlling the concentration or identity of dopants in a nanocrystal, but the lack of finer synthetic control leaves several fundamental questions unanswered regarding the effects of radial dopant placement, size, and nanocrystalline architecture on the LSPR energy and damping. Here, we present a layer-by-layer synthetic method for core/shell nanocrystals that permits exquisite and independent control over radial dopant placement, absolute dopant concentration, and nanocrystal size. Using Sn-doped In
    Language English
    Publishing date 2017-07-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.7b01053
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Light-Driven Permanent Charge Separation across a Hybrid Zero-Dimensional/Two-Dimensional Interface

    Kriegel, Ilka / Ghini, Michele / Bellani, Sebastiano / Zhang, Kehao / Jansons, Adam W / Crockett, Brandon M / Koskela, Kristopher M / Barnard, Edward S / Penzo, Erika / Hutchison, James E / Robinson, Joshua A / Manna, Liberato / Borys, Nicholas J / Schuck, P. James

    Journal of physical chemistry. 2020 Mar. 16, v. 124, no. 14

    2020  

    Abstract: We report the first demonstration of light-driven permanent charge separation across an ultrathin solid-state zero-dimensional (0D)/2D hybrid interface by coupling photoactive Sn-doped In2O3 nanocrystals with monolayer MoS2, the latter serving as a hole ... ...

    Abstract We report the first demonstration of light-driven permanent charge separation across an ultrathin solid-state zero-dimensional (0D)/2D hybrid interface by coupling photoactive Sn-doped In2O3 nanocrystals with monolayer MoS2, the latter serving as a hole collector. We demonstrate that the nanocrystals in this device-ready architecture act as local light-controlled charge sources by quasi-permanently donating ∼5 holes per nanocrystal to the monolayer MoS2. The amount of photoinduced contactless charge transfer to the monolayer MoS2 competes with what is reached in electrostatically gated devices. Thus, we have constructed a hybrid bilayer structure in which the electrons and holes are separated into two different solid-state materials. The temporal evolution of the local doping levels of the monolayer MoS2 follows a capacitive charging model with effective total capacitances in the femtofarad regime and areal capacitances in the μF cm–2 range. This analysis indicates that the 0D/2D hybrid system may be able to store light energy at densities of at least μJ cm–2, presenting new potential foundational building blocks for next-generation nanodevices that can remotely control local charge density, power miniaturized circuitry, and harvest and store optical energy.
    Keywords electrons ; electrostatic interactions ; energy ; models ; molybdenum disulfide ; nanocrystals ; physical chemistry
    Language English
    Dates of publication 2020-0316
    Size p. 8000-8007.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1932-7455
    DOI 10.1021/acs.jpcc.0c01147
    Database NAL-Catalogue (AGRICOLA)

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