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Review Paper

Applied Science and Convergence Technology 2021; 30(6): 186-190

Published online November 30, 2021


Copyright © The Korean Vacuum Society.

Detection of Carbon Dioxide Using Cucurbit[6]uril-Functionalized Gold Nanorod Gas Sensor Based on Localized Surface Plasmon Resonance

Seongjae Joa , † , Jinyeong Kima , † , Yejin Kima , and Oh Seok Kwona , b , ∗

aInfectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea
bNanobiotechnology and Bioinformatics (Major), University of Science & Technology (UST), Daejeon 34141, Republic of Korea

Correspondence to:E-mail: oskwon79@kribb.re.kr

Received: September 16, 2021; Revised: November 4, 2021; Accepted: November 5, 2021

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Owing to rapid climate change and increasingly stringent carbon regulations, carbon dioxide detection is becoming more important. In this study, we fabricate a cucurbit[6]uril-functionalized gold nanorod-based localized surface plasmon resonance (LSPR) gas sensor to detect carbon dioxide. The gold nanorods provide a high refractive index unit that enables the measurement of gas molecules with low molecular weights, while cucurbit[6]uril is a chemical receptor that binds to carbon dioxide owing to its structural characteristics. Therefore, cucurbit[6]uril was functionalized through direct adhesion on the surface of gold nanorods, which was replaced with citrate. The manufactured sensor can detect the presence of carbon dioxide at a maximum concentration of 400 ppm in the atmosphere. The high potential applicability of the cucurbit[6]urilapplied LSPR gas sensors is demonstrated in this study.

Keywords: Carbon dioxide, Gold nanorods, Localized surface plasmon resonance, Cucurbituril, Gas sensor

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