Separation of extremely small indium oxide quantum dots and their highly luminescent properties by dispersing agent

Do Hyun Kim; Hyeran Cho; Myeung jin Lee; Hong Dae Kim; Dong Jin Lee; Gyu Tae Kim

doi:10.1016/j.jallcom.2022.166073

Separation of extremely small indium oxide quantum dots and their highly luminescent properties by dispersing agent

Do Hyun Kim, Hyeran Cho, Myeung jin Lee, Hong Dae Kim, Dong Jin Lee, Gyu Tae Kim

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

3 Citations (Scopus)

Abstract

Acquiring extremely small quantum dots (QDs) absorbing and emitting light in the ultraviolet region is challenging because of the difficulty in size control via chemical synthesis. Here, we report that extremely small In₂O₃ QDs with high crystallinity can be earned from a pristine In₂O₃ powder of which the average size exceeds the range of QDs. Interestingly, we extracted the extremely small In₂O₃ QDs by a series of filtration processes of an In₂O₃ suspension. Transmission electron microscopy images confirmed In₂O₃ nanoparticles falling within the range of QDs. The tiny In₂O₃ QDs absorbed light at a wavelength of 220 and 280 nm and exhibited the maximum photoluminescence spectra in the ultraviolet region under the excitation of the wavelengths. Furthermore, we investigated the effect of a surfactant on the optical properties of In₂O₃ QDs separated from the powder. As a result, the luminescent intensity of In₂O₃ QDs enhanced drastically with the addition of sodium dodecylbenzene sulfonate. Our findings pave the way to acquiring highly luminescent tiny QDs from other semiconducting powders.

Original language	English
Article number	166073
Journal	Journal of Alloys and Compounds
Volume	921
DOIs	https://doi.org/10.1016/j.jallcom.2022.166073
Publication status	Published - 2022 Nov 15

Bibliographical note

Funding Information:
This research was supported by Nano-Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science & ICT (Grant No. NRF-2017M3A7B4049119 ) and the Ministry of Trade, Industry and Energy, Korea (Grant No. 2005721 ).

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

Luminescence
Nanofabrications
Nanostructured materials
Optical spectroscopy
Oxide materials

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2022.166073

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title = "Separation of extremely small indium oxide quantum dots and their highly luminescent properties by dispersing agent",

abstract = "Acquiring extremely small quantum dots (QDs) absorbing and emitting light in the ultraviolet region is challenging because of the difficulty in size control via chemical synthesis. Here, we report that extremely small In2O3 QDs with high crystallinity can be earned from a pristine In2O3 powder of which the average size exceeds the range of QDs. Interestingly, we extracted the extremely small In2O3 QDs by a series of filtration processes of an In2O3 suspension. Transmission electron microscopy images confirmed In2O3 nanoparticles falling within the range of QDs. The tiny In2O3 QDs absorbed light at a wavelength of 220 and 280 nm and exhibited the maximum photoluminescence spectra in the ultraviolet region under the excitation of the wavelengths. Furthermore, we investigated the effect of a surfactant on the optical properties of In2O3 QDs separated from the powder. As a result, the luminescent intensity of In2O3 QDs enhanced drastically with the addition of sodium dodecylbenzene sulfonate. Our findings pave the way to acquiring highly luminescent tiny QDs from other semiconducting powders.",

keywords = "Luminescence, Nanofabrications, Nanostructured materials, Optical spectroscopy, Oxide materials",

author = "Kim, {Do Hyun} and Hyeran Cho and Lee, {Myeung jin} and Kim, {Hong Dae} and Lee, {Dong Jin} and Kim, {Gyu Tae}",

note = "Funding Information: This research was supported by Nano-Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science & ICT (Grant No. NRF-2017M3A7B4049119 ) and the Ministry of Trade, Industry and Energy, Korea (Grant No. 2005721 ). Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

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doi = "10.1016/j.jallcom.2022.166073",

language = "English",

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AU - Kim, Do Hyun

AU - Cho, Hyeran

AU - Lee, Myeung jin

AU - Kim, Hong Dae

AU - Lee, Dong Jin

AU - Kim, Gyu Tae

N1 - Funding Information: This research was supported by Nano-Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science & ICT (Grant No. NRF-2017M3A7B4049119 ) and the Ministry of Trade, Industry and Energy, Korea (Grant No. 2005721 ). Publisher Copyright: © 2022 Elsevier B.V.

PY - 2022/11/15

Y1 - 2022/11/15

N2 - Acquiring extremely small quantum dots (QDs) absorbing and emitting light in the ultraviolet region is challenging because of the difficulty in size control via chemical synthesis. Here, we report that extremely small In2O3 QDs with high crystallinity can be earned from a pristine In2O3 powder of which the average size exceeds the range of QDs. Interestingly, we extracted the extremely small In2O3 QDs by a series of filtration processes of an In2O3 suspension. Transmission electron microscopy images confirmed In2O3 nanoparticles falling within the range of QDs. The tiny In2O3 QDs absorbed light at a wavelength of 220 and 280 nm and exhibited the maximum photoluminescence spectra in the ultraviolet region under the excitation of the wavelengths. Furthermore, we investigated the effect of a surfactant on the optical properties of In2O3 QDs separated from the powder. As a result, the luminescent intensity of In2O3 QDs enhanced drastically with the addition of sodium dodecylbenzene sulfonate. Our findings pave the way to acquiring highly luminescent tiny QDs from other semiconducting powders.

AB - Acquiring extremely small quantum dots (QDs) absorbing and emitting light in the ultraviolet region is challenging because of the difficulty in size control via chemical synthesis. Here, we report that extremely small In2O3 QDs with high crystallinity can be earned from a pristine In2O3 powder of which the average size exceeds the range of QDs. Interestingly, we extracted the extremely small In2O3 QDs by a series of filtration processes of an In2O3 suspension. Transmission electron microscopy images confirmed In2O3 nanoparticles falling within the range of QDs. The tiny In2O3 QDs absorbed light at a wavelength of 220 and 280 nm and exhibited the maximum photoluminescence spectra in the ultraviolet region under the excitation of the wavelengths. Furthermore, we investigated the effect of a surfactant on the optical properties of In2O3 QDs separated from the powder. As a result, the luminescent intensity of In2O3 QDs enhanced drastically with the addition of sodium dodecylbenzene sulfonate. Our findings pave the way to acquiring highly luminescent tiny QDs from other semiconducting powders.

KW - Luminescence

KW - Nanofabrications

KW - Nanostructured materials

KW - Optical spectroscopy

KW - Oxide materials

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Separation of extremely small indium oxide quantum dots and their highly luminescent properties by dispersing agent

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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