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Role of Surface Capping Molecule Polarity on the Optical Properties of Solution Synthesized Germanium Nanocrystals

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Download Hi-Res ImageDownload to MS-PowerPointCite This:Langmuir 2017, 33, 35, 8790-8798
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    Role of Surface Capping Molecule Polarity on the Optical Properties of Solution Synthesized Germanium Nanocrystals
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    † ‡ § †School of Chemistry, ‡Australian Centre for Nanomedicine, §Electron Microscopy Mark Wainwright Analytical Centre, ⊥ARC Centre of Excellence in Exciton Science, and #ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, NSW 2052, Australia
    ∥ Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
    *E-mail: [email protected]
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    Langmuir

    Cite this: Langmuir 2017, 33, 35, 8790–8798
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    https://doi.org/10.1021/acs.langmuir.7b01028
    Published May 29, 2017
    Copyright © 2017 American Chemical Society
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    Abstract

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    The role surface capping molecules play in dictating the optical properties of semiconductor nanocrystals (NCs) is becoming increasingly evident. In this paper the role of surface capping molecule polarity on the optical properties of germanium NCs (Ge NCs) is explored. Capping molecules are split into two groups: nonpolar and polar. The NCs are fully characterized structurally and optically to establish the link between observed optical properties and surface capping molecules. Ge NC optical properties altered by surface capping molecule polarity include emission maximum, emission lifetime, quantum yield, and Stokes shift. For Ge NCs, this work also allows rational tuning of their optical properties through changes to surface capping molecule polarity, leading to improvements in emerging Ge based bioimaging and optoelectronic devices.

    Copyright © 2017 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.langmuir.7b01028.

    • Electron diffraction pattern, high resolution TEM image and corresponding FFT, 1H NMR spectra, high resolution XPS spectra, Tauc plots, full emission spectra between 300–400 nm excitation wavelengths, and photographs of Ge NCs under 365 nm excitation (PDF)

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    Cited By

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    This article is cited by 4 publications.

    1. Jun Guo, Yan Chen, Yadong Zhang, Yiguo Xu, Yunlong Zhou, Xiuwen Zhang, Xiaoqing Gao. Shape-Dependent Linear Dichroism Spectra of Colloidal Semiconductor Nanocrystals. Langmuir 2021, 37 (24) , 7611-7616. https://doi.org/10.1021/acs.langmuir.1c01155
    2. Bruno Pescara, Katherine A. Mazzio. Morphological and Surface-State Challenges in Ge Nanoparticle Applications. Langmuir 2020, 36 (40) , 11685-11701. https://doi.org/10.1021/acs.langmuir.0c01891
    3. B. F. P. McVey, R. A. Swain, D. Lagarde, Y. Tison, H. Martinez, B. Chaudret, C. Nayral, F. Delpech. Unraveling the role of zinc complexes on indium phosphide nanocrystal chemistry. The Journal of Chemical Physics 2019, 151 (19) https://doi.org/10.1063/1.5128234
    4. Tabitha A. Amollo, Genene T. Mola, Vincent O. Nyamori. Polymer solar cells with reduced graphene oxide–germanium quantum dots nanocomposite in the hole transport layer. Journal of Materials Science: Materials in Electronics 2018, 29 (9) , 7820-7831. https://doi.org/10.1007/s10854-018-8781-1
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    Langmuir

    Cite this: Langmuir 2017, 33, 35, 8790–8798
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.langmuir.7b01028
    Published May 29, 2017
    Copyright © 2017 American Chemical Society
    Request reuse permissions

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