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Li Z, Li D, Zhang M, Jin Y, Xu Q, Yang H, Sun Y, Pu X, Li L, Zhang Y. Large dynamic range dual-mode pH sensors via dye-doped ionic liquid fiber optofluidic lasers. Analyst 2023; 148:5050-5059. [PMID: 37668015 DOI: 10.1039/d3an01156a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
We report a fiber optofluidic laser (FOFL) using an RhB-doped ionic liquid (BmimPF6) as the gain medium and explore its application for large dynamic range highly sensitive pH sensing. Due to the high Q-factor of the FOFL and the unique merits of BmimPF6, lasing emission presents a threshold of only 0.61 μJ mm-1. Particularly, lasing emission behaviors are strongly dependent on the pH value of the gain medium, i.e., in the pH range 4.28-6.37, the lasing central wavelength blue-shifts monotonically with a sensitivity as high as 5.02 nm per pH unit, which we attribute to the conversion of the cationic form of RhB to the zwitterionic form caused by the deprotonation of the COOH group. Under alkaline conditions (pH 7.20-11.17), the lasing emission intensity exhibits a significant decrease and the corresponding lasing central wavelength is also blue-shifted due to the solvent effect. The sensitivity based on the wavelength shift is 3.03 nm per pH unit, which is 4-fold higher than that of fluorescence-based sensing, while the sensitivity based on the variation of the lasing emission intensity is almost three orders of magnitude higher than that of fluorescence-based sensing. Our work presents a novel dual sensing paradigm in response to different pH conditions, which can greatly improve the reliability and discrimination of pH sensing.
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Affiliation(s)
- Zhi Li
- Department of Physics, Yunnan University, Kunming 650091, China.
| | - Dongyang Li
- Department of Physics, Yunnan University, Kunming 650091, China.
| | - Mengda Zhang
- Department of Physics, Yunnan University, Kunming 650091, China.
| | - Yingxia Jin
- School of Materials and Energy, Yunnan University, Kunming 650091, China
| | - Qingbo Xu
- Department of Physics, Yunnan University, Kunming 650091, China.
| | - Haiyan Yang
- School of Architectural Engineering, Kunming Metallurgy College, Kunming 650033, China
| | - Yuze Sun
- Department of Electrical Engineering, The University of Texas at Arlington, Arlington, TX 76019, USA
| | - Xiaoyun Pu
- Department of Physics, Yunnan University, Kunming 650091, China.
| | - Liang Li
- School of Materials and Energy, Yunnan University, Kunming 650091, China
| | - Yuanxian Zhang
- Department of Physics, Yunnan University, Kunming 650091, China.
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Li D, Zhou L, Yu Q, Pu X, Sun Y, Zhou Q, Zhang Y. Optical fiber optofluidic laser based on surfactant solubilization of rhodamine B gain in an aqueous solution. OPTICS EXPRESS 2022; 30:23295-23304. [PMID: 36225013 DOI: 10.1364/oe.461670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 06/02/2022] [Indexed: 06/16/2023]
Abstract
We report a whispering gallery mode (WGM)-based fiber optofluidic laser (FOFL), in which rhodamine B (RhB) in an aqueous surfactant solution of sodium dodecylbenzene sulfonate (SDBS) is used as the laser gain medium. Here, the role of SDBS is to scatter the RhB dye molecules to effectively prevent its self-association in the aqueous solution. Therefore, the fluorescence quantum yield of the used RhB dye is improved due to the enhanced solubilization, which results in a low lasing threshold of ∼2.2 µJ/mm2 when the concentration of SDBS aqueous solution reaches up to 20 mM, on par with or even better than most of the optofluidic dye lasers using RhB as the gain medium in an organic solution. We then establish a model of solubilization capacity of SDBS micelles, which successfully addresses the mechanisms of dye-surfactant interactions in the proposed FOFL system. We further apply this FOFL platform to the case of concentration sensing of the used SDBS, which exhibits a 2-order-of-magnitude improvement in sensitivity compared to the fluorescence measurement due to the signal amplification inherent to the lasing process. The proposed FOFL platform in combination with surfactant solubilization gain medium in an aqueous solution promises to enable chip-scale coherent light sources for various environmental and bio-chemical sensing applications.
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Baig MM, Yousuf MA, Alsafari IA, Ali M, Agboola PO, Shakir I, Haider S, Warsi MF. New mesostructured origami silica matrix: a nano-platform for highly retentive and pH-controlled delivery system. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2021. [DOI: 10.1080/16583655.2021.1902176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Mirza Mahmood Baig
- Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Muhammad Asif Yousuf
- Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Ibrahim A. Alsafari
- Department of Chemistry, College of Science, University of Hafr Al Batin, Hafr Al Batin, Saudi Arabia
- Department of Biology, College of Science, University of Hafr Al Batin, Hafr Al Batin, Saudi Arabia
| | - Muhammad Ali
- Department of Chemistry, University of Sargodha, Sargodha, Pakistan
| | - Philips O. Agboola
- College of Engineering Al-Muzahmia Branch, King Saud University, Riyadh, Saudi Arabia
| | - Imran Shakir
- Sustainable Energy Technologies (SET) Center, College of Engineering, King Saud University, Riyadh, Saudi Arabia
| | - Sajjad Haider
- Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia
| | - Muhammad Farooq Warsi
- Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
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Yamaguchi S, Minbuta S, Matsui K. Adsorption of the Cationic Dye Methylene Blue on Anodic Porous Alumina in Sodium Dodecyl Sulfate Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:4592-4599. [PMID: 32320252 DOI: 10.1021/acs.langmuir.0c00182] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Dyeing of anodic porous alumina (APA) prepared by aluminum anodization is generally achieved by dipping the positively charged APA surface into a negatively charged dye solution. We have proposed a new method to adsorb dyes and molecules onto APA using negatively charged sodium dodecyl sulfate (SDS). In this study, we found that cationic methylene blue (MB) can be adsorbed onto the positively charged APA surface using SDS aqueous solutions. We investigated two adsorption methods: dipping APA into aqueous solutions containing both MB and SDS (method 1) and successive dipping of APA into SDS and then MB aqueous solutions (method 2). The two methods produced different adsorption characteristics. Method 1 adsorption profile reflected formation of dye-rich induced micelles below the critical micellar concentration (CMC) and electrostatic interaction of micelles with MB above CMC. Method 2 adsorption was explained by electrostatic interaction of preadsorbed SDS with APA and MB.
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Affiliation(s)
- Shohei Yamaguchi
- Institute of Science and Technology, Kanto Gakuin University, 1-50-1, Mutsuurahigashi, Yokohama 236-8501, Japan
| | - Satoshi Minbuta
- Graduate School of Engineering, Kanto Gakuin University, 1-50-1, Mutsuurahigashi, Yokohama 236-8501, Japan
| | - Kazunori Matsui
- Graduate School of Engineering, Kanto Gakuin University, 1-50-1, Mutsuurahigashi, Yokohama 236-8501, Japan
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Silva FCM, Silva LKR, Santos AGD, Caldeira VPS, Cruz-Filho JF, Cavalcante LS, Longo E, Luz GE. Structural Refinement, Morphological Features, Optical Properties, and Adsorption Capacity of α-Ag2WO4 Nanocrystals/SBA-15 Mesoporous on Rhodamine B Dye. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01560-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Adsorption Behaviour of Rhodamine B on Hen Feather and Corn Starch Functionalized with Green Synthesized Silver Nanoparticles (AgNPs) Mediated with Cocoa Pods Extracts. CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY 2019. [DOI: 10.1007/s42250-019-00113-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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