One-Dimensional Cuprous Selenide Nanostructures with Switchable Plasmonic and Super-ionic Phase Attributes

Ki-Hyun Cho; Jaeyoung Heo; Yun-Mo Sung; Prashant K Jain

doi:10.1002/anie.201902290

One-Dimensional Cuprous Selenide Nanostructures with Switchable Plasmonic and Super-ionic Phase Attributes

Angew Chem Int Ed Engl. 2019 Jun 17;58(25):8410-8415. doi: 10.1002/anie.201902290. Epub 2019 May 17.

Authors

Ki-Hyun Cho¹, Jaeyoung Heo², Yun-Mo Sung³, Prashant K Jain^{1

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5

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Affiliations

¹ Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave, Urbana, IL, 61801, USA.
² Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
³ Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea.
⁴ Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
⁵ Beckman Institute of Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
⁶ Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.

PMID: 31016822
DOI: 10.1002/anie.201902290

Abstract

Cuprous selenide nanocrystals have hallmark attributes, especially tunable localized surface plasmon resonances (LSPRs) and super-ionic behavior. These attributes of cuprous selenide are now integrated with a one-dimensional morphology. Essentially, Cu₂ Se nanowires (NWs) of micrometer-scale lengths and about 10 nm diameter are prepared. The NWs exhibit a super-ionic phase that is stable at temperatures lower than in the bulk, owing to compressive lattice strain along the radial dimension of the NWs. The NWs can be switched between oxidized and reduced forms, which have contrasting phase transition and LSPR characteristics. This work thus makes available switchable, one-dimensional waveguides and ion-conducting channels.

Keywords: CdSe; cation exchange; ion conduction; plasmon; solid electrolytes.

Abstract

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