Large dynamic range dual-mode pH sensors <i>via</i> dye-doped ionic liquid fiber optofluidic lasers

Li, Zhi; Li, Dongyang; Zhang, Mengda; Jin, Yingxia; Xu, Qingbo; Yang, Haiyan; Sun, Yuze; Pu, Xiaoyun; Li, Liang; Zhang, Yuanxian

doi:10.1039/d3an01156a

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2023

DOI: 10.1039/d3an01156a

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Large dynamic range dual-mode pH sensors via dye-doped ionic liquid fiber optofluidic lasers

Zhi Li,

Dongyang Li,

Mengda Zhang

et al.

Abstract: Fiber optofluidic lasers using an RhB-doped ionic liquid (BmimPF6) as the gain medium can realize large dynamic range dual-mode pH sensing.

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2024

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References 38 publications

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Ultra-low threshold pH sensor based on a whispering gallery mode microbubble resonator

Cao,

Dai,

Peng

et al. 2024

Applied Physics Letters

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Laser sensing has a wide range of applications. In this paper, we propose a pH sensing laser with an ultra-low threshold and low sample consumption based on a whispering-gallery-mode microbubble resonator. Rhodamine 6G aqueous solutions with different pH values are injected through microfluidic channels as the lasing gain media and interact with a high-quality factor microbubble cavity with a sample consumption of only 550 pL to achieve lasing. Subtle pH changes of the aqueous solution lead to changes in lasing intensity in real time, and the threshold reaches a minimum of 0.091 μ J/mm2. The low pump energy density effectively avoids the self-aggregation and photobleaching effects of dye molecules present in high-concentration rhodamine 6G solutions. The lasing characteristics under different pH conditions were determined experimentally and theoretically, and the results are in good agreement. Due to the deprotonation of amino groups in highly alkaline environments, the lasing threshold is highly dependent on the pH of rhodamine 6G aqueous solutions. In the pH range of 10.16–13.14, the lasing intensity changes considerably with the increasing pH. The proposed pH-sensing laser exhibits a fast response time, low toxicity, and a high signal-to-noise ratio, making it promising for highly sensitive alkaline detection in biological applications.

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Ultra-low threshold pH sensor based on a whispering gallery mode microbubble resonator

Cao,

Dai,

Peng

et al. 2024

Applied Physics Letters

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show abstract

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Large dynamic range dual-mode pH sensors via dye-doped ionic liquid fiber optofluidic lasers

Abstract: Fiber optofluidic lasers using an RhB-doped ionic liquid (BmimPF6) as the gain medium can realize large dynamic range dual-mode pH sensing.

Cited by 1 publication

References 38 publications

Ultra-low threshold pH sensor based on a whispering gallery mode microbubble resonator

Ultra-low threshold pH sensor based on a whispering gallery mode microbubble resonator

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