Ultralow-Loss Substrate for Nanophotonic Dark-Field Microscopy

Thang Minh Nguyen; Yong Deok Cho; Ji Hyeok Huh; Hayun Ahn; Na Yeoun Kim; Kyung Hun Rho; Jaewon Lee; Min Kwon; Sung Hun Park; Chae Eon Kim; Kwangjin Kim; Young Seok Kim; Seungwoo Lee

doi:10.1021/acs.nanolett.2c05030

Ultralow-Loss Substrate for Nanophotonic Dark-Field Microscopy

Thang Minh Nguyen, Yong Deok Cho, Ji Hyeok Huh, Hayun Ahn, Na Yeoun Kim, Kyung Hun Rho, Jaewon Lee, Min Kwon, Sung Hun Park, Chae Eon Kim, Kwangjin Kim, Young Seok Kim, Seungwoo Lee

KU-KIST Graduate School of Converging Science and Technology

Research output: Contribution to journal › Article › peer-review

Abstract

For the colloidal nanophotonic structures, a transmission electron microscope (TEM) grid has been widely used as a substrate of dark-field microscopy because a nanometer-scale feature can be effectively determined by TEM imaging following dark-field microscopic studies. However, an optically lossy carbon layer has been implemented in conventional TEM grids. A broadband scattering from the edges of the TEM grid further restricted an accessible signal-to-noise ratio. Herein, we demonstrate that the freely suspended, ultrathin, and wide-scale transparent nanomembrane can address such challenges. We developed a 1 mm by 600 μm scale and 20 nm thick poly(vinyl formal) nanomembrane, whose area is around 180 times wider than a conventional TEM grid, so that the possible broadband scattering at the edges of the grid was effectively excluded. Also, such nanomembranes can be formed without the assistance of carbon support; allowing us to achieve the highest signal-to-background ratio of scattering among other substrates.

Original language	English
Pages (from-to)	1546-1554
Number of pages	9
Journal	Nano Letters
Volume	23
Issue number	4
DOIs	https://doi.org/10.1021/acs.nanolett.2c05030
Publication status	Published - 2023 Feb 22

Bibliographical note

Funding Information:
This work was supported by NRF-2022M3H4A1A02074314 (future technology laboratory program) funded by the National Research Foundation of Korea, the KU-KIST School Project, and a Korea University grant. This work was also supported by the Basic Research Project (Grant No. 401C2905) funded by Korea Electronics Technology Institute. Y.C. is personally supported by the government scholarship funded by the National Research Foundation of Korea (NRF-2018-Global Ph.D. Fellowship Program).

Publisher Copyright:
© 2023 American Chemical Society.

Keywords

Dark-field spectroscopy
Mie scattering
Nanoparticles
Nanophotonics
Plasmonics

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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10.1021/acs.nanolett.2c05030

Cite this

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title = "Ultralow-Loss Substrate for Nanophotonic Dark-Field Microscopy",

abstract = "For the colloidal nanophotonic structures, a transmission electron microscope (TEM) grid has been widely used as a substrate of dark-field microscopy because a nanometer-scale feature can be effectively determined by TEM imaging following dark-field microscopic studies. However, an optically lossy carbon layer has been implemented in conventional TEM grids. A broadband scattering from the edges of the TEM grid further restricted an accessible signal-to-noise ratio. Herein, we demonstrate that the freely suspended, ultrathin, and wide-scale transparent nanomembrane can address such challenges. We developed a 1 mm by 600 μm scale and 20 nm thick poly(vinyl formal) nanomembrane, whose area is around 180 times wider than a conventional TEM grid, so that the possible broadband scattering at the edges of the grid was effectively excluded. Also, such nanomembranes can be formed without the assistance of carbon support; allowing us to achieve the highest signal-to-background ratio of scattering among other substrates.",

keywords = "Dark-field spectroscopy, Mie scattering, Nanoparticles, Nanophotonics, Plasmonics",

author = "Nguyen, {Thang Minh} and Cho, {Yong Deok} and Huh, {Ji Hyeok} and Hayun Ahn and Kim, {Na Yeoun} and Rho, {Kyung Hun} and Jaewon Lee and Min Kwon and Park, {Sung Hun} and Kim, {Chae Eon} and Kwangjin Kim and Kim, {Young Seok} and Seungwoo Lee",

note = "Funding Information: This work was supported by NRF-2022M3H4A1A02074314 (future technology laboratory program) funded by the National Research Foundation of Korea, the KU-KIST School Project, and a Korea University grant. This work was also supported by the Basic Research Project (Grant No. 401C2905) funded by Korea Electronics Technology Institute. Y.C. is personally supported by the government scholarship funded by the National Research Foundation of Korea (NRF-2018-Global Ph.D. Fellowship Program). Publisher Copyright: {\textcopyright} 2023 American Chemical Society.",

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doi = "10.1021/acs.nanolett.2c05030",

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AU - Nguyen, Thang Minh

AU - Cho, Yong Deok

AU - Huh, Ji Hyeok

AU - Ahn, Hayun

AU - Kim, Na Yeoun

AU - Rho, Kyung Hun

AU - Lee, Jaewon

AU - Kwon, Min

AU - Park, Sung Hun

AU - Kim, Chae Eon

AU - Kim, Kwangjin

AU - Kim, Young Seok

AU - Lee, Seungwoo

N1 - Funding Information: This work was supported by NRF-2022M3H4A1A02074314 (future technology laboratory program) funded by the National Research Foundation of Korea, the KU-KIST School Project, and a Korea University grant. This work was also supported by the Basic Research Project (Grant No. 401C2905) funded by Korea Electronics Technology Institute. Y.C. is personally supported by the government scholarship funded by the National Research Foundation of Korea (NRF-2018-Global Ph.D. Fellowship Program). Publisher Copyright: © 2023 American Chemical Society.

PY - 2023/2/22

Y1 - 2023/2/22

N2 - For the colloidal nanophotonic structures, a transmission electron microscope (TEM) grid has been widely used as a substrate of dark-field microscopy because a nanometer-scale feature can be effectively determined by TEM imaging following dark-field microscopic studies. However, an optically lossy carbon layer has been implemented in conventional TEM grids. A broadband scattering from the edges of the TEM grid further restricted an accessible signal-to-noise ratio. Herein, we demonstrate that the freely suspended, ultrathin, and wide-scale transparent nanomembrane can address such challenges. We developed a 1 mm by 600 μm scale and 20 nm thick poly(vinyl formal) nanomembrane, whose area is around 180 times wider than a conventional TEM grid, so that the possible broadband scattering at the edges of the grid was effectively excluded. Also, such nanomembranes can be formed without the assistance of carbon support; allowing us to achieve the highest signal-to-background ratio of scattering among other substrates.

AB - For the colloidal nanophotonic structures, a transmission electron microscope (TEM) grid has been widely used as a substrate of dark-field microscopy because a nanometer-scale feature can be effectively determined by TEM imaging following dark-field microscopic studies. However, an optically lossy carbon layer has been implemented in conventional TEM grids. A broadband scattering from the edges of the TEM grid further restricted an accessible signal-to-noise ratio. Herein, we demonstrate that the freely suspended, ultrathin, and wide-scale transparent nanomembrane can address such challenges. We developed a 1 mm by 600 μm scale and 20 nm thick poly(vinyl formal) nanomembrane, whose area is around 180 times wider than a conventional TEM grid, so that the possible broadband scattering at the edges of the grid was effectively excluded. Also, such nanomembranes can be formed without the assistance of carbon support; allowing us to achieve the highest signal-to-background ratio of scattering among other substrates.

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KW - Plasmonics

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Ultralow-Loss Substrate for Nanophotonic Dark-Field Microscopy

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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