Electro-Optical Device with Tunable Transparency Using Colloidal Core/Shell Nanoparticles

doi:10.1021/acsphotonics.7b01337

Title: Electro-Optical Device with Tunable Transparency Using Colloidal Core/Shell Nanoparticles

Abstract

Here, suspended particle devices (SPDs) adapted for controlling the transmission of electromagnetic radiation have become an area of considerable focus for smart window technology due to their desirable properties, such as instant and precise light control and cost-effectiveness. Here, we demonstrate a SPD with tunable transparency in the visible regime using colloidal assemblies of nanoparticles. The observed transparency using ZnS/SiO ₂ core/shell colloidal nanoparticles is dynamically tunable in response to an external electric field with increased transparency when applied voltage increases. The observed transparency change is attributed to structural ordering of nanoparticle assemblies and thereby modifies the photonic band structures, as confirmed by the finite-difference time-domain simulations of Maxwell’s equations. The transparency of the device can also be manipulated by changing the particle size and the device thickness. In addition to transparency, structural colorations and their dynamic tunability are demonstrated using α-Fe ₂O ₃/SiO ₂ core/shell nanomaterials, resulting from the combination of inherent optical properties of α-Fe ₂O ₃/SiO ₂ nanomaterials and coloration due to their tunable structural particle assemblies in response to electric stimuli.

Authors:

^[1]; Freyman, Megan C. ^[1]; Feigenbaum, E. ^[1]; Yong-Jin Han, T. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Publication Date:: 2018-03-07

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1466126

Report Number(s):: LLNL-JRNL-740703
Journal ID: ISSN 2330-4022; 894509

Grant/Contract Number:: AC52-07NA27344

Resource Type:: Accepted Manuscript

Journal Name:: ACS Photonics

Additional Journal Information:: Journal Volume: 5; Journal Issue: 4; Journal ID: ISSN 2330-4022

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; core/shell nanoparticles; light matter interaction; particle assemblies; suspended particle device; transparency tunability

Citation Formats


                    Han, Jinkyu, Freyman, Megan C., Feigenbaum, E., and Yong-Jin Han, T. Electro-Optical Device with Tunable Transparency Using Colloidal Core/Shell Nanoparticles.  United States: N. p., 2018. 
        Web.  doi:10.1021/acsphotonics.7b01337.

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                    Han, Jinkyu, Freyman, Megan C., Feigenbaum, E., & Yong-Jin Han, T. Electro-Optical Device with Tunable Transparency Using Colloidal Core/Shell Nanoparticles.  United States.  doi:10.1021/acsphotonics.7b01337.

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                    Han, Jinkyu, Freyman, Megan C., Feigenbaum, E., and Yong-Jin Han, T. Wed .  
        "Electro-Optical Device with Tunable Transparency Using Colloidal Core/Shell Nanoparticles".  United States.  doi:10.1021/acsphotonics.7b01337.  https://www.osti.gov/servlets/purl/1466126.

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@article{osti_1466126,

  title        = {Electro-Optical Device with Tunable Transparency Using Colloidal Core/Shell Nanoparticles},

  author       = {Han, Jinkyu and Freyman, Megan C. and Feigenbaum, E. and Yong-Jin Han, T.},

  abstractNote = {Here, suspended particle devices (SPDs) adapted for controlling the transmission of electromagnetic radiation have become an area of considerable focus for smart window technology due to their desirable properties, such as instant and precise light control and cost-effectiveness. Here, we demonstrate a SPD with tunable transparency in the visible regime using colloidal assemblies of nanoparticles. The observed transparency using ZnS/SiO2 core/shell colloidal nanoparticles is dynamically tunable in response to an external electric field with increased transparency when applied voltage increases. The observed transparency change is attributed to structural ordering of nanoparticle assemblies and thereby modifies the photonic band structures, as confirmed by the finite-difference time-domain simulations of Maxwell’s equations. The transparency of the device can also be manipulated by changing the particle size and the device thickness. In addition to transparency, structural colorations and their dynamic tunability are demonstrated using α-Fe2O3/SiO2 core/shell nanomaterials, resulting from the combination of inherent optical properties of α-Fe2O3/SiO2 nanomaterials and coloration due to their tunable structural particle assemblies in response to electric stimuli.},

  doi          = {10.1021/acsphotonics.7b01337},

  journal      = {ACS Photonics},

  number       = 4,

  volume       = 5,

  place        = {United States},

  year         = {2018},

  month        = {3}

}

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Journal Article:

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DOI: 10.1021/acsphotonics.7b01337

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Figures / Tables:

Figure 1: Representative SEM images of ZnS nanoparticle clusters with different particle size of (A) d_ZnS = 110.3 5.7 nm, (B) d_ZnS = 72.6 4.2 nm, and (C) dZnS = 62.1 3.1 nm and (D) TEM images of ZnS/SiO₂ core/shell nanoparticles (d_ZnS = 72.6 4.2 nm, t_SiO2 = 21.4 1.8more »

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