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Huang D, Du J, Luo F, He G, Zou M, Wang Y, Lin Z, Wu D, Weng Z. Injectable Hydrogels with Integrated Ph Probes and Ultrasound-Responsive Microcapsules as Smart Wound Dressings for Visual Monitoring and On-Demand Treatment of Chronic Wounds. Adv Healthc Mater 2024; 13:e2303379. [PMID: 38211342 DOI: 10.1002/adhm.202303379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 01/07/2024] [Indexed: 01/13/2024]
Abstract
Hydrogel dressings capable of infection monitoring and precise treatment administration show promise for advanced wound care. Existing methods involve embedd ingorganic dyes or flexible electronics into preformed hydrogels, which raise safety issues and adaptability challenges. In this study, an injectable hydrogel based smart wound dressing is developed by integrating food-derived anthocyanidin as a visual pH probe for infection monitoring and poly(L-lactic acid) microcapsules as ultrasound-responsive delivery systems for antibiotics into a poly(ethylene glycol) hydrogel. This straightforwardly prepared hydrogel dressing maintains its favorable properties for wound repair, including porous morphology and excellent biocompatibility. In vitro experiments demonstrated that the hydrogel enabled visual assessment of pH within the range of 5 ∼ 9.Meanwhile, the release of antibiotics could be triggered and controlled by ultrasound. In vivo evaluations using infected wounds and diabetic wounds revealed that the wound dressing effectively detected wound infection by monitoring pH levels and achieved antibacterial effects through ultrasound-triggered drug release. This led to significantly enhanced wound healing, as validated by histological analysis and the measurement of inflammatory cytokine levels. This injectable hydrogel-based smart wound dressing holds great potential for use in clinical settings to inform timely and precise clinical intervention and in community to improve wound care management.
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Affiliation(s)
- Da Huang
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Jiahao Du
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Fang Luo
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Gang He
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Minglang Zou
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Yongming Wang
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Zhenyu Lin
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Decheng Wu
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Zuquan Weng
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China
- Department of Plastic Surgery, the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, 350005, China
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Zhang Z, Zhang H, Hou L, Jia D, Yao K, Meng Q, Qu J, Yan B, Luan Q, Liu T. Highly sensitive fiber-optic chemical pH sensor based on surface modification of optical fiber with ZnCdSe/ZnS quantum dots. Anal Chim Acta 2024; 1294:342281. [PMID: 38336409 DOI: 10.1016/j.aca.2024.342281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/06/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024]
Abstract
The pH value plays a vital role in many biological and chemical reactions. In this work, the fiber-optic chemical pH sensors were fabricated based on carboxyl ZnCdSe/ZnS quantum dots (QDs) and tapered optical fiber. The photoluminescence (PL) intensity of QDs is pH-dependence because protonation and deprotonation can affect the process of electron-hole recombination. The evanescent wave of tapered optical fiber was used as excitation source in the process of PL. To obtain higher sensitivity, the end faces of fiber were optimized for cone region. By lengthening the cone region and shrinking the end diameter of optical fiber, evanescent wave was enhanced and the excitation times of QDs were increased, which improved the PL intensity and the sensitivity of the sensor. The sensitivity of sensor can reach as high as 0.139/pH in the range of pH 6.00-9.01. The surface functional modification was adopted to prepare sensing films. The carboxyl groups on the QDs ligands are chemically bonded to the fiber surface, which is good for response time (40 s) and stability (decreased 0.9 % for 5 min). These results demonstrated that ZnCdSe/ZnS QDs-based fiber-optic chemical pH sensors are promising approach in rapid and precise pH detection.
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Affiliation(s)
- Zongjie Zhang
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Hongxia Zhang
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China.
| | - Lili Hou
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Dagong Jia
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Kaixin Yao
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Qingyang Meng
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Jiayi Qu
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Bing Yan
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Qingxin Luan
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
| | - Tiegen Liu
- School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Opto-electronics Information Technology (Tianjin University), Tianjin 300072, China
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3
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Wang X, Feng Y, Li Z, Liu J, Sun D, Yang W, Xing X, Liu W, Zhang H. A novel multifunctional fluorescent capillary-based sensor for simultaneous monitoring of pH, O 2 and CO 2. Spectrochim Acta A Mol Biomol Spectrosc 2024; 304:123349. [PMID: 37703794 DOI: 10.1016/j.saa.2023.123349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/01/2023] [Accepted: 09/04/2023] [Indexed: 09/15/2023]
Abstract
A fluorescent capillary sensor for detecting the bioanalytically and biologically relevant analytes pH, O2, and CO2 has been designed. The sensor is based on single capillary tube with 2 mm inner diameter, which is simultaneous doped with emissive O2-sensitive indicator Ru(dpp)3(PF6)2 (RuDP), pH-sensitive and CO2-sensitive indicator 8-hydroxypyrene-1, 3,6-trisulfonic acid trisodium salt (HPTS). The multifunctional sensor can be excited at the same wavelength and realize multi-parameter optical monitoring at the different sensing position. Studies in phosphate-buffered solutions display the excellent feasibility of the capillary sensor for fluorescence detection of pH, O2, and CO2. Overall, the multifunctional capillary sensor exhibits great potential in real-time blood gas analysis, and clinical application of multi-parameter biological detection.
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Affiliation(s)
- Xiaohui Wang
- Beijing Key laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China.
| | - Yuanxiangyi Feng
- Beijing Key laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Zhe Li
- Beijing Key laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Jinhua Liu
- Department of Pulmonary and Critical Care Medicine, The Third Hospital of Changsha, Changsha 410015, China
| | - Dandan Sun
- Beijing Key laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Wei Yang
- Beijing Key laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Xiaowei Xing
- School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Wenjun Liu
- School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
| | - Hongxin Zhang
- Beijing Key laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
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4
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Zhang Y, Li Z, Wang Q, Jia D, Liu Y. Rapid and visual evaluation the internal corruption of meat tissue by a designed near-infrared fluorescence probe with a broad pH response range. Spectrochim Acta A Mol Biomol Spectrosc 2023; 302:123035. [PMID: 37385205 DOI: 10.1016/j.saa.2023.123035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 06/10/2023] [Accepted: 06/16/2023] [Indexed: 07/01/2023]
Abstract
Rapid and visual evaluation the internal corruption of meat tissue is closely related to public health. The pH change caused by glycolysis and amino acid decomposition is an important indicator of meat freshness. Herein, we designed a pH-responsive NIR fluorescent probe (Probe-OH) based on protonation/deprotonation for monitoring the internal corruption of meat tissue. Probe-OH was synthesized by a stable hemicyanine skeleton with phenolic hydroxyl group, which exhibited excellent performances such as high selectivity, high sensitivity, fast response time (60 s), a broad pH-responsive range of 4.0-10.0, and superior spatio-temporal sampling ability. In addition, we conducted a paper chip platform to measure pH value in different meat samples (pork and chicken), which is convenient to evaluate pH value of meat by observing the color changes of paper strips. Furthermore, in combination with the NIR advantages of fluorescence imaging, Probe-OH was successfully applied to assess the freshness of pork and chicken breasts, and the structural changes of muscle tissue can be clearly observed under confocal microscope. The results of Z-axis scanning showed that Probe-OH could penetrate into the interior to monitor the internal corruption of meat tissue, the fluorescence intensity changes with scanning height in the meat tissue section, and reaches its maximum at 50 μm. To the best of our knowledge, there have been no reports of fluorescence probe being used to image the inside of meat tissue section so far. It is expected that we can provide a new rapid, sensitive, near-infrared fluorescence method for assessment of the freshness in the internal organization of meat.
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Affiliation(s)
- Yuan Zhang
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China
| | - Zhao Li
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China.
| | - Qiuyue Wang
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China
| | - Dongli Jia
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China
| | - Yongfeng Liu
- Shaanxi Engineering Laboratory for Food Green Processing and Safety Control, and Shaanxi Key Laboratory for Hazard Factors Assessment in Processing and Storage of Agricultural Products, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China.
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5
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Jang M, Han MS. A pH-responsive sensor based on intramolecular internal standard for reproducible detection of strong acids and bases via 19F NMR spectroscopy. Anal Chim Acta 2023; 1274:341558. [PMID: 37455077 DOI: 10.1016/j.aca.2023.341558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/16/2023] [Accepted: 06/22/2023] [Indexed: 07/18/2023]
Abstract
Numerous methods, including pH meters and optical sensors, have been developed for the detection of pH, which is an important indicator in various fields. However, those methods are susceptible to errors in strongly acidic and basic ranges and inaccurate pH measurement due to sample turbidity, hindering their application such as photographic industries and wastewater treatment facilities. Eco-friendly and non-invasive 19F NMR spectroscopy is a promising technique for measurement of strong acids and bases owing to its high sensitivity and little interference; nevertheless, inconsistencies in reproducibility impede its widespread adoption. Herein, we developed a19F NMR-based pH sensor by introducing an intramolecular internal standard strategy into a pH-responsive fluorinated material. Based on the acceptable deviation (ΔδF = 17-19 ppb) in the evaluation of the internal standard signal, this pH-sensing platform enabled reproducible pH measurements in strongly acidic and basic environments. Moreover, its 19F NMR response showed reversibility and high stability to potential interfering factors, and the low absolute difference (0.026-0.086 in pH) for real samples such as diet Coke suggests its potential suitability for various acidic beverages.
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Affiliation(s)
- Mincheol Jang
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Min Su Han
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea.
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6
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Xu J, Huang M, Jiao L, Pang H, Wang X, Duan R, Wu Q. Supramolecular Dimer as High-Performance pH Probe: Study on the Fluorescence Properties of Halogenated Ligands in Rigid Schiff Base Complex. Int J Mol Sci 2023; 24:ijms24119480. [PMID: 37298432 DOI: 10.3390/ijms24119480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
The development of high-performance fluorescence probes has been an active area of research. In the present work, two new pH sensors Zn-3,5-Cl-saldmpn and Zn-3,5-Br-saldmpn based on a halogenated Schiff ligand (3,5-Cl-saldmpn = N, N'-(3,3'-dipropyhnethylamine) bis (3,5-chlorosalicylidene)) with linearity and a high signal-to-noise ratio were developed. Analyses revealed an exponential intensification in their fluorescence emission and a discernible chromatic shift upon pH increase from 5.0 to 7.0. The sensors could retain over 95% of their initial signal amplitude after 20 operational cycles, demonstrating excellent stability and reversibility. To elucidate their unique fluorescence response, a non-halogenated analog was introduced for comparison. The structural and optical characterization suggested that the introduction of halogen atoms can create additional interaction pathways between adjacent molecules and enhance the strength of the interaction, which not only improves the signal-to-noise ratio but also forms a long-range interaction process in the formation of the aggregation state, thus enhancing the response range. Meanwhile, the above proposed mechanism was also verified by theoretical calculations.
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Affiliation(s)
- Jiajun Xu
- Department of Chemical Science and Technology, Kunming University, Kunming 650214, China
| | - Meifen Huang
- College of Physics Science and Technology, Kunming University, Kunming 650214, China
| | - Liang Jiao
- College of Physics Science and Technology, Kunming University, Kunming 650214, China
| | - Haijun Pang
- The School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China
| | - Xia Wang
- Department of Chemical Science and Technology, Kunming University, Kunming 650214, China
| | - Rui Duan
- Department of Chemical Science and Technology, Kunming University, Kunming 650214, China
| | - Qiong Wu
- Department of Chemical Science and Technology, Kunming University, Kunming 650214, China
- Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China
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Yu C, Lu G, Yan C, Xu J, Zhang F. Preparation and pH Detection Performance of Rosin-Based Fluorescent Polyurethane Microspheres. J Fluoresc 2023:10.1007/s10895-023-03160-z. [PMID: 36790631 DOI: 10.1007/s10895-023-03160-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 01/25/2023] [Indexed: 02/16/2023]
Abstract
Rosin-based fluorescent polyurethane emulsion (FPU) was prepared using isophorone diisocyanate, ester of acrylic rosin and glycidyl methacrylate, 1,5-dihydroxy naphthalene (1,5-DN), and 1,4-butanediol as the raw materials. Then, rosin-based fluorescent polyurethane microspheres (FPUMs) were successfully prepared by suspension polymerization method using FPU as the main material, azodiisobutyronitrile as the initiator, and gelatin as the dispersant. FPUMs were characterized by Fourier transform infrared spectra, thermogravimetric analysis, optical microscopy, scanning electron microscopy and fluorescence spectra, and the response performance of FPUMs to pH was studied. The results showed that FPUMs were successfully prepared. With the increase of the level of 1,5-DN, the particle size of FPUMs increased gradually, and the fluorescence intensity increased first and then decreased. When the level of 1,5-DN was 3 wt.%, the average particle size was 49.3 μm, the particle distribution index (PDI) was 1.05, and the fluorescence intensity was the largest (3662 a.u.). The fluorescence intensity of FPUMs increased linearly with the decrease of pH, which can be used for pH detection in solution. Furthermore, the FPUMs exhibited good thermal stability, anti-interference and recoverability.
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Affiliation(s)
- Caili Yu
- College of Chemistry and Biology Engineering, Guilin University of Technology, Guilin, 541004, China
| | - Guangjie Lu
- College of Chemistry and Biology Engineering, Guilin University of Technology, Guilin, 541004, China
| | - Chengfei Yan
- College of Chemistry and Biology Engineering, Guilin University of Technology, Guilin, 541004, China
| | - Jianben Xu
- College of Materials Science and Engineering, Guilin University of Technology, No 12, Jiangan Road, Guilin, 541004, People's Republic of China.
| | - Faai Zhang
- College of Materials Science and Engineering, Guilin University of Technology, No 12, Jiangan Road, Guilin, 541004, People's Republic of China.
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Rossignatti BC, Vieira AP, Barbosa MS, Abegão LMG, Mello HJNPD. Thin Films of Polyaniline-Based Nanocomposites with CeO 2 and WO 3 Metal Oxides Applied to the Impedimetric and Capacitive Transducer Stages in Chemical Sensors. Polymers (Basel) 2023; 15:polym15030578. [PMID: 36771879 PMCID: PMC9920537 DOI: 10.3390/polym15030578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/06/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
There is a recognized need for the development of cost-effective, stable, fast, and optimized novel materials for technological applications. Substantial research has been undertaken on the role of polymeric nanocomposites in sensing applications. However, the use of PANI-based nanocomposites in impedimetric and capacitive electrochemical sensors has yet to be understood. The present study aimed to explore the relationship between the sensitivity and linearity of electrochemical pH sensors and the composition of nanocomposites. Thin films of PANI/CeO2 and PANI/WO3 were deposited via spin coating for characterization and application during the electrochemical impedance and capacitance spectroscopy (EIS and ECS) transduction stages. The findings showed that the optimized performance of the devices was extended not only to the sensitivity but also to the linearity. An increase of 213% in the ECS sensitivity of the PANI/CeO2 compared to the metal oxide and an increase of 64% in the ECS linearity of the PANI/WO3 compared to the polymeric sensitivity were reported. This study identified the structure-property relationship of nanocomposite thin films of PANI with metal oxides for use in electrochemical sensors. The developed materials could be applied in devices to be used in different fields, such as food, environment, and biomedical monitoring.
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Affiliation(s)
| | - Amanda Portes Vieira
- Physics Institute, Goiás Federal University, Samambaia Campus, Goiânia 74001-970, GO, Brazil
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Wang Z, Wang L, Bian H, Huang Z, Zhang X, Xiao Y. Outer Surface-Labeled Bacteria as Live Sensors Accurately Quantitating Interfacial pH: A Smart Technique for Antimicrobial Resistance. ACS Nano 2022; 16:18344-18354. [PMID: 36373972 DOI: 10.1021/acsnano.2c06226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The techniques to quantitatively monitor environmental factors surrounding the bacterial outer surface rather than the host's subcellular regions (e.g., lysosomes) should be the key to evaluate bacterial immune escape behavior. We report wild Staphylococcus aureus (SA) and methicillin-resistant Staphylococcus aureus (MRSA) labeled with a fluorescent resonance energy transfer probe, 4SR-L-BDP, on their outer surfaces as smart live sensors to quantify interfacial pH. The dual emission of 4SR-L-BDP affords high sensitivity to pH change in a ratiometric way in the pH range of 4-8 with high precision. Notably, 4SR-L-BDP possesses an anchoring group to fix on the bacterial surface for sensing the microenvironment encountered. Super-resolution imaging clearly demonstrates the specific labeling of bacterial membranes. These live sensors are applied in two-channel ratiometric imaging to dynamically visualize and quantify their interfacial pH changes during infection of macrophages. It is found that the interfacial pH of MRSA is lower by 0.2 units compared to that of SA. Such small but critical difference in pH reflects MRSA's ability to adapt to microenvironmental pH inside macrophages. These labeled bacteria as live sensors are also proven to be practically applicable in mice models with immune deficiency and immune activation.
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Affiliation(s)
- Zehui Wang
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Lai Wang
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Hui Bian
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhenlong Huang
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xinfu Zhang
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Yi Xiao
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials Oriented Chemical Engineering, Dalian University of Technology, Dalian 116024, China
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10
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Li D, Li L. Detection of Water pH Using Visible Near-Infrared Spectroscopy and One-Dimensional Convolutional Neural Network. Sensors (Basel) 2022; 22:5809. [PMID: 35957365 PMCID: PMC9370975 DOI: 10.3390/s22155809] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/30/2022] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
pH is an important parameter for water quality detection. This study proposed a novel calibration regression strategy based on a one-dimensional convolutional neural network (1D-CNN) for water pH detection using visible near-infrared (Vis-NIR) spectroscopy. Two groups of Vis-NIR spectral analysis experiments of water pH detection were employed to evaluate the performance of 1D-CNN. Two conventional multivariate regression calibration methods, including partial least squares (PLS) and least squares support vector machine (LS-SVM), were introduced for comparative analysis with 1D-CNN. The successive projections algorithm (SPA) was adopted to select the feature variables. In addition, the learning mechanism of 1D-CNN was interpreted through visual feature maps by convolutional layers. The results showed that the 1D-CNN models obtained the highest prediction accuracy based on full spectra for the two experiments. For the spectrophotometer experiment, the root mean square error of prediction (RMSEP) was 0.7925, and the determination coefficient of prediction (Rp2) was 0.8515. For the grating spectrograph experiment, the RMSEP was 0.5128 and the Rp2 was 0.9273. The convolutional layers could automatically preprocess the spectra and effectively extract the spectra features. Compared with the traditional regression methods, 1D-CNN does not need complex spectra pretreatment and variable selection. Therefore, 1D-CNN is a promising regression approach, with higher prediction accuracy and better modeling convenience for rapid water pH detection using Vis-NIR spectroscopy.
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Affiliation(s)
| | - Lina Li
- Correspondence: ; Tel.: +86-13-395023485
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11
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Jang HJ, Sui X, Zhuang W, Huang X, Chen M, Cai X, Wang Y, Ryu B, Pu H, Ankenbruck N, Beavis K, Huang J, Chen J. Remote Floating-Gate Field-Effect Transistor with 2-Dimensional Reduced Graphene Oxide Sensing Layer for Reliable Detection of SARS-CoV-2 Spike Proteins. ACS Appl Mater Interfaces 2022; 14:24187-24196. [PMID: 35593886 DOI: 10.1021/acsami.2c04969] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Despite intensive research of nanomaterials-based field-effect transistors (FETs) as a rapid diagnostic tool, it remains to be seen for FET sensors to be used for clinical applications due to a lack of stability, reliability, reproducibility, and scalability for mass production. Herein, we propose a remote floating-gate (RFG) FET configuration to eliminate device-to-device variations of two-dimensional reduced graphene oxide (rGO) sensing surfaces and most of the instability at the solution interface. Also, critical mechanistic factors behind the electrochemical instability of rGO such as severe drift and hysteresis were identified through extensive studies on rGO-solution interfaces varied by rGO thickness, coverage, and reduction temperature. rGO surfaces in our RFGFET structure displayed a Nernstian response of 54 mV/pH (from pH 2 to 11) with a 90% yield (9 samples out of total 10), coefficient of variation (CV) < 3%, and a low drift rate of 2%, all of which were calculated from the absolute measurement values. As proof-of-concept, we demonstrated highly reliable, reproducible, and label-free detection of spike proteins of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in a saliva-relevant media with concentrations ranging from 500 fg/mL to 5 μg/mL, with an R2 value of 0.984 and CV < 3%, and a guaranteed limit of detection at a few pg/mL. Taken together, this new platform may have an immense effect on positioning FET bioelectronics in a clinical setting for detecting SARS-CoV-2.
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Affiliation(s)
- Hyun-June Jang
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Chemical Sciences and Engineering Division, Physical Sciences and Engineering Directorate, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Xiaoyu Sui
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Chemical Sciences and Engineering Division, Physical Sciences and Engineering Directorate, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Wen Zhuang
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Xiaodan Huang
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Min Chen
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Xiaolei Cai
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Yale Wang
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, United States
| | - Byunghoon Ryu
- Chemical Sciences and Engineering Division, Physical Sciences and Engineering Directorate, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Haihui Pu
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Chemical Sciences and Engineering Division, Physical Sciences and Engineering Directorate, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Nicholas Ankenbruck
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Kathleen Beavis
- Department of Pathology, University of Chicago, Chicago, Illinois 60637, United States
| | - Jun Huang
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Junhong Chen
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Chemical Sciences and Engineering Division, Physical Sciences and Engineering Directorate, Argonne National Laboratory, Lemont, Illinois 60439, United States
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12
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Zhou J, Du W, Shao T, Li Z, Zhang D, Wang L, Fang Z, Li J, Wu Q, Zhang C, Li L. Pyrimidine-Based Fluorescent Probe for Monitoring Mitophagy via Detection of Mitochondrial pH Variation. Chembiochem 2022; 23:e202200217. [PMID: 35575966 DOI: 10.1002/cbic.202200217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 05/13/2022] [Indexed: 11/06/2022]
Abstract
Impaired mitophagy hinders the clearance of damaged mitochondria, inducing pathological states. Knowledge of this phenomenon is key to diagnose certain diseases and understand their pathogenesis. Mitophagy involves an acidization process that could sever as an ideal detection target. In this work, we designed and synthesized a mitochondrial-targeting fluorescence probe, Z2, for evaluating pH variation. This probe exhibited remarkable "turn-on" fluorescence under acidic condition. In biological applications, Z2 showed a strong, specific pH detection capacity in Parkin-overexpressing HeLa cells during the mitophagy process. The "turn-on" fluorescence property of Z2 is also used to detect pH variation in Caenorhabditis elegans (C. elegans). This probe, as the novel pH assessment tool, may facilitate further research of mitophagy-associated pathological patterns.
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Affiliation(s)
- Jia Zhou
- Nanjing Tech University, Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), CHINA
| | - Wei Du
- Nanjing Tech University, Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), CHINA
| | - Tao Shao
- Northwestern Polytechnic University, Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, CHINA
| | - Zheng Li
- Nanjing Tech University, Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), CHINA
| | - Duoteng Zhang
- Xiamen University, The Institute of Flexible Electronics (IFE, Future Technologies), CHINA
| | - Lan Wang
- Nanjing Tech University, Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), CHINA
| | - Zhijie Fang
- Nanjing Tech University, Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), CHINA
| | - Jie Li
- Nanjing Tech University, Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), CHINA
| | - Qiong Wu
- Nanjing Tech University, 30 South Puzhu Road, 211816, Nanjing, CHINA
| | - Chengwu Zhang
- Shanxi Medical University, School of Basic Medical Sciences, CHINA
| | - Lin Li
- Nanjing Tech University, ey Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), CHINA
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13
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Mugo SM, Lu W, Lemieux S. Stainless steel electrochemical capacitive microneedle sensors for multiplexed simultaneous measurement of pH, nitrates, and phosphates. Mikrochim Acta 2022; 189:206. [PMID: 35501613 DOI: 10.1007/s00604-022-05307-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 04/07/2022] [Indexed: 10/18/2022]
Abstract
Concerns for agri-food safety and environmental management require development of simple to use and cost- and time-effective multiplex sensors for point-of-need (PON) chemical analytics by public end-user. Simultaneous detection of nitrates, phosphates, and pH is of importance in soil and water analysis, agriculture, and food quality assessment. This article demonstrates a suite of stainless steel microneedle electrochemical sensors for multiplexed measurement of pH, nitrate, and phosphate using faradaic capacitance derived from cyclic voltammetry as the mode of detection. The multi-target microneedle sensors were fabricated by layer-by-layer (LbL) assembly in a stainless steel hypodermic microneedle substrate. For nitrate sensing, the stainless steel was coated with carbon nanotube/cellulose nanocrystal (CNT)/CNC) decorated with silver nanoparticles (Ag). For pH measurement, the polyaniline (pANI) was coated onto the CNT/CNC@Ag film, while for phosphate detection, the CNT/CNC/Ag @pANI microneedle was further decorated with ammonium molybdenum tetrahydrate (AMT). The microelectrode platforms were characterized by FTIR, Raman, and microscopic techniques. The nitrate- and phosphate-based microneedle electrochemical sensors had excellent selectivity and sensitivity, with a determined limit of detection (LOD) of 0.008 mM and 0.007 mM, respectively. The pH microneedle sensor was responsive to pH in the linear range of 3-10. The three microneedle sensors yielded repeatable results, with a precision ranging from 4.0 to 7.5% RSD over the concentration ranges tested. The inexpensive (~ 1 $ CAD) microneedle sensors were successfully verified for use in quantification of nitrate, pH, and phosphate in brewed black coffee as a real sample. As such, the microneedle sensors are economical devices and show great promise as robust platforms for PON precision chemical analytics.
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14
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Zhu X, Yu J, Yan Y, Song W, Hai X. One-pot alkali cutting-assisted synthesis of fluorescence tunable amino-functionalized graphene quantum dots as a multifunctional nanosensor for sensing of pH and tannic acid. Talanta 2022; 236:122874. [PMID: 34635254 DOI: 10.1016/j.talanta.2021.122874] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 08/24/2021] [Accepted: 09/09/2021] [Indexed: 01/01/2023]
Abstract
Herein, a one-pot alkali cutting-assisted synthesis approach has been developed to gain fluorescence (FL) tunable amino functionalized GQDs (NH2-GQDs), which exhibit concentration- and excitation-dependent FL behaviors, due to the self-assembled J-type aggregation effect and different electronic transitions governed by graphene basal plane and functional groups. While NH2-GQDs possess brighter FL emission than pristine GQDs, owning to the functionalization of amino groups with strong electron withdrawing ability. Particularly, the pH-dependent FL behavior of NH2-GQDs further reflects the FL emission mechanism originated from the intrinsic zigzag sites and introduced amino and carboxylic groups, which is available for pH sensing. Moreover, the NH2-GQDs also show a FL quenching upon reaction with tannic acid (TA), resulting in the construction of a FL turn-off TA sensing platform. A good linear relationship is obtained between logarithm of FL intensity (log F) and TA concentration in a linear dynamic range of 1-40 μM and a limit of detection of 43.3 nM (3σ/s, n = 9) is achieved, with a precision of 0.08% RSD at a concentration level of 5 μM (n = 9). This work features a simple and direct approach to acquire multifunctional nanosensor, providing great potential for further applications in chem/biosensing.
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Affiliation(s)
- Xueying Zhu
- Research Center for Intelligent and Wearable Technology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, PR China
| | - Jiayu Yu
- Research Center for Intelligent and Wearable Technology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, PR China
| | - Yongcun Yan
- Research Center for Intelligent and Wearable Technology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, PR China
| | - Weiling Song
- Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Xin Hai
- Research Center for Intelligent and Wearable Technology, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, PR China.
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15
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Liu S, Liu H, Chen Q, Hou J, Yang G. Preparation of boronic acid-modified polymer dots under mild conditions and their applications in pH and glucose detection. Mikrochim Acta 2021; 189:36. [PMID: 34951680 DOI: 10.1007/s00604-021-05137-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 12/07/2021] [Indexed: 12/26/2022]
Abstract
For the first time, boronic acid-modified polymer dots (B-PDs) were fabricated by a "synthesis-modification integration" route using polyethylenimine (PEI) and phenylboronic acid as precursors. Under optimized preparation conditions, the B-PDs exhibited an average size of 2.2 nm, good water solubility, and high fluorescence quantum yield of 8.69%. The B-PDs showed reversible fluorescence response in acid solutions (blue emissions) and alkaline solutions (green emissions). The fluorescence emissions of B-PDs demonstrated an obvious red shift with varying the pH value from 1 - 13. Moreover, glucose could assemble on the surface of B-PDs due to the reversible reaction between boronic acid and cis-diols, which resulted in a blue shift of emission wavelength and an obvious increase of FL intensity at λex = 380 nm based on the aggregation-induced enhancement effect. The glucose sensing method was thus developed in the range 0.0001 - 1.0 mol L-1. Applications to real human blood and glucose injection samples demonstrated satisfactory results. The B-PDs based on the analytical method display good selectivity, wide detection range, and simplicity in preparation and detection, implying promising applications as a practical platform for biosensing.
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16
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Yuan F, Kong Y, You J, Zhang C, Xian Y. Rational Synthesis of Imine-Linked Fluorescent Covalent Organic Frameworks with Different p Ka for pH Sensing In Vitro and In Vivo. ACS Appl Mater Interfaces 2021; 13:51351-51361. [PMID: 34689554 DOI: 10.1021/acsami.1c14690] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Precise modulation of pH in living cells plays a vital role in the study of many diseases, such as cancer and rheumatoid arthritis. Here, a series of imine-linked covalent organic frameworks (COFs) were rationally designed and developed for pH sensing in tumor cells and zebrafish. Four monomers were chosen to synthesize COFs (COF1-COF4) with different pKa by a simple orthogonal combination through condensation reaction. The as-obtained COFs exhibited a sensitive pH-dependent fluorescence response compared to their building blocks. Among them, COF2 possessed a high crystallinity, excellent fluorescence, and suitable pKa for biosensing. For bioimaging applications, COF2 was modified with poly-d-lysine (PDL) to improve its biocompatibility and endocytosis efficiency. After that, PDL-modified COF2 (PDL@COF2) was used as a novel fluorescence probe with a superior linear pH response over the range from 5.0 to 8.0 due to its fully reversible protonation and deprotonation. The fluorescent PDL@COF2 was further employed as a good candidate for pH imaging in tumor cells and zebrafish. The as-constructed environment-sensitive fluorescent COFs have greatly expanded the applications of COFs in the biological area.
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Affiliation(s)
- Fang Yuan
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Yujing Kong
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Jia You
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Cuiling Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Yuezhong Xian
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
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17
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Zhang W, Zhao X, Diao L, Li H, Tong Z, Gu Z, Miao B, Xu Z, Zhang H, Wu Y, Li J. Highly Sensitive Uric Acid Detection Based on a Graphene Chemoresistor and Magnetic Beads. Biosensors (Basel) 2021; 11:bios11090304. [PMID: 34562894 PMCID: PMC8468455 DOI: 10.3390/bios11090304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 08/22/2021] [Accepted: 08/27/2021] [Indexed: 05/14/2023]
Abstract
In this study, we developed a low-cost, reusable, and highly sensitive analytical platform for the detection of the human metabolite uric acid (UA). This novel analysis platform combines the graphene chemoresistor detection technique with a magnetic bead (MB) system. The heterojunction (single-layer graphene and HfO2 thin-film material) of our graphene-based biosensor worked as a transducer to detect the pH change caused by the specific catalytic reaction between UA and uricase, and hence acquires a UA concentration. Immobilization of uricase on MBs can decouple the functionalization steps from the sensor surface, which allows the sensor to be reusable. Our microsensor platform exhibits a relatively lower detection limit (1 μM), high sensitivity (5.6 mV/decade), a linear range (from 1 μM to 1000 μM), and excellent linearity (R2 = 0.9945). In addition, interference assay and repeatability tests were conducted, and the result suggests that our method is highly stable and not affected by common interfering substances (glucose and urea). The integration of this high-performance and compact biosensor device can create a point-of-care diagnosis system with reduced cost, test time, and reagent volume.
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Affiliation(s)
- Wangyang Zhang
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215125, China; (W.Z.); (L.D.); (H.L.); (Z.T.); (Z.G.); (B.M.); (Z.X.)
- College of Mechatronic Engineering, North University of China, Taiyuan 030051, China;
| | - Xiaoqiang Zhao
- College of Mechatronic Engineering, North University of China, Taiyuan 030051, China;
| | - Lina Diao
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215125, China; (W.Z.); (L.D.); (H.L.); (Z.T.); (Z.G.); (B.M.); (Z.X.)
- School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei 230026, China
| | - Hao Li
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215125, China; (W.Z.); (L.D.); (H.L.); (Z.T.); (Z.G.); (B.M.); (Z.X.)
- College of Mechatronic Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Zhonghao Tong
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215125, China; (W.Z.); (L.D.); (H.L.); (Z.T.); (Z.G.); (B.M.); (Z.X.)
- College of Mechatronic Engineering, North University of China, Taiyuan 030051, China;
| | - Zhiqi Gu
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215125, China; (W.Z.); (L.D.); (H.L.); (Z.T.); (Z.G.); (B.M.); (Z.X.)
| | - Bin Miao
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215125, China; (W.Z.); (L.D.); (H.L.); (Z.T.); (Z.G.); (B.M.); (Z.X.)
| | - Zhan Xu
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215125, China; (W.Z.); (L.D.); (H.L.); (Z.T.); (Z.G.); (B.M.); (Z.X.)
- School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei 230026, China
| | - Han Zhang
- Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA;
| | - Yue Wu
- College of Mechatronic Engineering, North University of China, Taiyuan 030051, China;
- Correspondence: (Y.W.); (J.L.); Tel.: +81-03-513-922-752 (Y.W.); +86-51-262-872-678 (J.L.)
| | - Jiadong Li
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215125, China; (W.Z.); (L.D.); (H.L.); (Z.T.); (Z.G.); (B.M.); (Z.X.)
- Correspondence: (Y.W.); (J.L.); Tel.: +81-03-513-922-752 (Y.W.); +86-51-262-872-678 (J.L.)
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18
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Zhu P, Li J, Gao L, Xiong J, Tan K. Strategy to Synthesize Tunable Multiemission Carbon Dots and Their Multicolor Visualization Application. ACS Appl Mater Interfaces 2021; 13:33354-33362. [PMID: 34250799 DOI: 10.1021/acsami.1c07260] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Studies on multiemission fluorescent carbon dots (CDs) excited at one wavelength are extremely promising because of their label-free property, facile synthesis, multicolor visualization, and prevention of background interference. In this study, a novel template strategy to develop multiemission carbon dots (M-CDs) using fluorescent precursors has emerged. We attempted to elucidate the relationship between precursor substances and luminescence origins. The M-CDs prepared by calcein demonstrate three emissions, ultraviolet (UV), blue, and green, which are attributed to the solvent, surface defect, and precursor aromatic ring luminophores, respectively. Also, through a regular adjustment of the amount of NaOH or the solvothermal synthesis time, the expected optical requirements were successfully met by the M-CDs, which is a better capability than that of previously reported M-CDs. In addition, a multicolor sensor designed with M-CDs and rhodamine B (RhB) has been successfully applied in cell imaging. When exposed to different pH media, the fluorescence (FL) emission shows a linear relationship with the pH value, displaying a profuse color evolution from dark blue to light blue, cyan, green, yellow, and finally, orange.
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Affiliation(s)
- Panpan Zhu
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
| | - Jiayu Li
- Chongqing Key Laboratory of Translational Medicine in Major Metabolic Disease, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P. R. China
| | - Lixia Gao
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
| | - Jie Xiong
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
| | - Kejun Tan
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
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19
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Rahman MS, Naima RL, Shetu KJ, Hossain MM, Kaiser MS, Hosen ASMS, Sarker MAL, Ooi KJA. Silicene Quantum Capacitance Dependent Frequency Readout to a Label-Free Detection of DNA Hybridization- A Simulation Analysis. Biosensors (Basel) 2021; 11:178. [PMID: 34205927 PMCID: PMC8228175 DOI: 10.3390/bios11060178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/22/2021] [Accepted: 05/24/2021] [Indexed: 10/25/2022]
Abstract
The use of deoxyribonucleic acid (DNA) hybridization to detect disease-related gene expression is a valuable diagnostic tool. An ion-sensitive field-effect transistor (ISFET) with a graphene layer has been utilized for detecting DNA hybridization. Silicene is a two-dimensional silicon allotrope with structural properties similar to graphene. Thus, it has recently experienced intensive scientific research interest due to its unique electrical, mechanical, and sensing characteristics. In this paper, we proposed an ISFET structure with silicene and electrolyte layers for the label-free detection of DNA hybridization. When DNA hybridization occurs, it changes the ion concentration in the surface layer of the silicene and the pH level of the electrolyte solution. The process also changes the quantum capacitance of the silicene layer and the electrical properties of the ISFET device. The quantum capacitance and the corresponding resonant frequency readout of the silicene and graphene are compared. The performance evaluation found that the changes in quantum capacitance, resonant frequency, and tuning ratio indicate that the sensitivity of silicene is much more effective than graphene.
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Affiliation(s)
- Md. Sazzadur Rahman
- Institute of Information Technology, Jahangirnagar University, Savar Dhaka-1342, Bangladesh;
| | - Rokaia Laizu Naima
- Department of Electronics and Communication Engineering, Hajee Mohammad Danesh Science & Technology University, Basherhat N508, Bangladesh; (R.L.N.); (K.J.S.); (M.M.H.)
| | - Khatuna Jannatun Shetu
- Department of Electronics and Communication Engineering, Hajee Mohammad Danesh Science & Technology University, Basherhat N508, Bangladesh; (R.L.N.); (K.J.S.); (M.M.H.)
| | - Md. Mahabub Hossain
- Department of Electronics and Communication Engineering, Hajee Mohammad Danesh Science & Technology University, Basherhat N508, Bangladesh; (R.L.N.); (K.J.S.); (M.M.H.)
| | - M. Shamim Kaiser
- Institute of Information Technology, Jahangirnagar University, Savar Dhaka-1342, Bangladesh;
| | - A. S. M. Sanwar Hosen
- Division of Computer Science and Engineering, Jeonbuk National University, Jeonju 54896, Korea;
| | | | - Kelvin J. A. Ooi
- Department of Physics, Xiamen University Malaysia, Sepang 43900, Malaysia
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20
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Al-Khalqi EM, Abdul Hamid MA, Al-Hardan NH, Keng LK. Highly Sensitive Magnesium-Doped ZnO Nanorod pH Sensors Based on Electrolyte-Insulator-Semiconductor (EIS) Sensors. Sensors (Basel) 2021; 21:s21062110. [PMID: 33802968 PMCID: PMC8002599 DOI: 10.3390/s21062110] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/09/2021] [Accepted: 03/11/2021] [Indexed: 11/29/2022]
Abstract
For highly sensitive pH sensing, an electrolyte insulator semiconductor (EIS) device, based on ZnO nanorod-sensing membrane layers doped with magnesium, was proposed. ZnO nanorod samples prepared via a hydrothermal process with different Mg molar ratios (0–5%) were characterized to explore the impact of magnesium content on the structural and optical characteristics and sensing performance by X-ray diffraction analysis (XRD), atomic force microscopy (AFM), and photoluminescence (PL). The results indicated that the ZnO nanorods doped with 3% Mg had a high hydrogen ion sensitivity (83.77 mV/pH), linearity (96.06%), hysteresis (3 mV), and drift (0.218 mV/h) due to the improved crystalline quality and the surface hydroxyl group role of ZnO. In addition, the detection characteristics varied with the doping concentration and were suitable for developing biomedical detection applications with different detection elements.
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Affiliation(s)
- Ensaf Mohammed Al-Khalqi
- Department of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Selangor, Malaysia; (E.M.A.-K.); (N.H.A.-H.)
- Physics Department, Faculty of Applied Science, Thamar University, Dhamar 87246, Yemen
| | - Muhammad Azmi Abdul Hamid
- Department of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Selangor, Malaysia; (E.M.A.-K.); (N.H.A.-H.)
- Correspondence:
| | - Naif H. Al-Hardan
- Department of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Selangor, Malaysia; (E.M.A.-K.); (N.H.A.-H.)
| | - Lim Kar Keng
- Pusat Pengajian Citra Universiti, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia;
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21
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Yang Z, Gu B, Jiang C, Zhang L, Liu Q, Song S. A pH-responsive photoacoustic imaging probe for tumor pH imaging in vivo based on polyaniline-bovine serum albumin. Nanomedicine 2021; 33:102356. [PMID: 33460778 DOI: 10.1016/j.nano.2020.102356] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/29/2020] [Accepted: 12/13/2020] [Indexed: 02/04/2023]
Abstract
Precise pH detection in tumors can guide the design of pH-responsive drugs and theranostic agents to improve treatment efficacy. However, most reported pH-responsive probes are fluorescent probes, for which in vivo application is limited by low probe penetration depth. In this study, a pH-responsive polyaniline-bovine serum albumin (BSA) probe was constructed for precise pH detection in tumors using photoacoustic imaging. The probe can be used to generate high-resolution images of deep biological tissues. The photoacoustic signal of the polyaniline-BSA probe exhibits a clear linear relationship with pH in the range of 5-6.8 both in vitro and in vivo, indicating that the probe is ideal for precise pH detection in most tumors. The polyaniline-BSA probe also exhibits satisfactory biocompatibility, low toxicity, fast response, and good reversibility. This work provides a useful in vivo pH detection probe for developing pH-responsive drugs and theranostic agents.
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Affiliation(s)
- Ziyi Yang
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China; Center for Biomedical Imaging, Fudan University, Shanghai, China; Shanghai Engineering Research Center of Molecular Imaging Probes, Shanghai, China
| | - Bingxin Gu
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China; Center for Biomedical Imaging, Fudan University, Shanghai, China; Shanghai Engineering Research Center of Molecular Imaging Probes, Shanghai, China
| | - Chunjuan Jiang
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China; Center for Biomedical Imaging, Fudan University, Shanghai, China; Shanghai Engineering Research Center of Molecular Imaging Probes, Shanghai, China
| | - Le Zhang
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China; Center for Biomedical Imaging, Fudan University, Shanghai, China; Shanghai Engineering Research Center of Molecular Imaging Probes, Shanghai, China
| | - Qiufang Liu
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China; Center for Biomedical Imaging, Fudan University, Shanghai, China; Shanghai Engineering Research Center of Molecular Imaging Probes, Shanghai, China
| | - Shaoli Song
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China; Center for Biomedical Imaging, Fudan University, Shanghai, China; Shanghai Engineering Research Center of Molecular Imaging Probes, Shanghai, China.
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22
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Li B, Ge L, Lyu P, Chen M, Zhang X, Xie S, Wu Q, Kwok HF. Handheld pH meter-assisted immunoassay for C-reactive protein using glucose oxidase-conjugated dendrimer loaded with platinum nanozymes. Mikrochim Acta 2021; 188:14. [PMID: 33389237 PMCID: PMC7779416 DOI: 10.1007/s00604-020-04687-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 12/08/2020] [Indexed: 12/13/2022]
Abstract
A simple and feasible pH meter-based immunoassay is reported for detection of C-reactive protein (CRP) using glucose oxidase (GOD)-conjugated dendrimer loaded with platinum nanozyme. Initially, platinum nanozymes were loaded into the dendrimers through an in situ synthetic method. Then, GOD and monoclonal anti-CRP antibody with a high molar ratio were covalently conjugated onto carboxylated dendrimers via typical carbodiimide coupling. The immunoreaction was carried out with a competitive mode in a CRP-coated microplate. Along with formation of immunocomplex, the added glucose was oxidized into gluconic acid and hydrogen peroxide by GOD, and the latter was further decomposed by platinum nanozyme, thus accelerating chemical reaction in the positive direction. The produced gluconic acid changed the pH of detection solution, which was determined using a handheld pH meter. Under optimum conditions, the pH meter-based immunoassay gave a good signal toward target CRP from 0.01 to 100 ng mL-1. The limit of detection was 5.9 pg mL-1. An intermediate precision ≤ 11.2% was acquired with batch-to-batch identification. No nonspecific adsorption was observed during a series of procedures to detect target CRP, and the cross-reaction against other biomarkers was very low. Importantly, our system gave well-matched results for analysis of human serum samples relative to a referenced ELISA kit.Graphical abstract.
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Affiliation(s)
- Bin Li
- Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, 210023, People's Republic of China
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Avenida de Universidade, Taipa, Macau SAR
| | - Lilin Ge
- Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, 210023, People's Republic of China.
| | - Peng Lyu
- College of Biological Science and Technology, Fuzhou University, Fuzhou, 350108, Fujian, People's Republic of China
| | - Meijuan Chen
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, People's Republic of China
| | - Xiongfei Zhang
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, People's Republic of China
| | - Shuping Xie
- Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, 210023, People's Republic of China
- Division of Life Science, Hong Kong University of Science and Technology, Hong Kong, Hong Kong SAR
| | - Qinan Wu
- Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, 210023, People's Republic of China
| | - Hang Fai Kwok
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Avenida de Universidade, Taipa, Macau SAR.
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23
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Yang X, Ao J, Wu S, Ma S, Li X, Hu L, Liu W, Han C. Low-Power pH Sensor Based on Narrow Channel Open-Gated Al 0.25Ga 0.75N/GaN HEMT and Package Integrated Polydimethylsiloxane Microchannels. Materials (Basel) 2020; 13:ma13225282. [PMID: 33266399 PMCID: PMC7700280 DOI: 10.3390/ma13225282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/11/2020] [Accepted: 11/19/2020] [Indexed: 06/12/2023]
Abstract
pH sensors with low-power and strong anti-interference are extremely important for industrial online real-time detection. Herein, a narrow channel pH sensor based on Al0.25Ga0.75N/GaN high electron mobility transistor (HEMT) with package integrated Polydimethylsiloxane (PDMS) microchannels is proposed. The fabricated device has shown potential advantages in improving stability and reducing power consumption in response to pH changes of the solution. The performance of the pH sensor was demonstrated where the preliminary results showed an ultra-low power (<5.0 μW) at VDS = 1.0 V. Meanwhile, the sensitivity was 0.06 μA/V·pH in the range of pH = 2 to pH = 10, and the resolution of the sensor was 0.1 pH. The improvement in performance of the proposed sensor can be related to the narrow channel and microchannel, which can be attributed to better surface GaxOy in a microchannel with larger H+ and HO- concentration on the sensing surface during the detection process. The low-power sensor with excellent stability can be widely used in various unattended or harsh environments, and it is more conducive to integration and intelligence, which lays the foundation for online monitoring in vivo.
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Affiliation(s)
| | | | | | | | - Xin Li
- Correspondence: ; Tel.: +86-29-8266-3343
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24
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Yi Z, Li X, Zhang H, Ji X, Sun W, Yu Y, Liu Y, Huang J, Sarshar Z, Sain M. High quantum yield photoluminescent N-doped carbon dots for switch sensing and imaging. Talanta 2020; 222:121663. [PMID: 33167278 DOI: 10.1016/j.talanta.2020.121663] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 12/31/2022]
Abstract
Stable blue fluorescent nitrogen doped carbon dots (N-CDs) with a very high quantum yield up to 81% has been reported for the first time. Novel N-CDs were synthesized through an efficient and rapid one-step hydrothermal synthesis process from diethylenetriamine as nitrogen source and a novel carbon source trans-aconitic acid. The nanosized particles of N-CDs were in the range of 2-8 nm and uniformly distributed in molecular level. The N-CDs showed high selectivity toward Fe3+ with low detection limit of 10.42 nmol L-1 (with corresponding linear range of 2-50 μmol L-1) enabling them for ion detection application and also exhibited high fluorescence stability in extreme pH conditions. Novel N-CDs also presented a green emission shift under acidic condition (pH~2) which makes them a potential sensing probe for security papers, food packaging and bio-medical detection sensors. A security paper sensor device has been fabricated and its operation function has been validated by making real time detection of color. The novel and facile to manufacture carbon dots has potential applications ranging from biological nano-sensors for security document to color-switch sensing and bio-imaging.
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Affiliation(s)
- Zhihui Yi
- Graduate Department of Forestry, John H. Daniels Faculty of Architecture, Landscape, and Design, University of Toronto, 33 Willcocks Street, Toronto, ON, M5S 3B3, Canada
| | - Ximing Li
- Graduate Department of Forestry, John H. Daniels Faculty of Architecture, Landscape, and Design, University of Toronto, 33 Willcocks Street, Toronto, ON, M5S 3B3, Canada
| | - Hongyu Zhang
- State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, PR China
| | - Xiuling Ji
- State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, PR China
| | - Wei Sun
- Department of Chemistry, Faculty of Arts and Science, University of Toronto, 80 St. George Street, Toronto, ON, M5S 3H6, Canada
| | - Yuexin Yu
- Graduate Department of Forestry, John H. Daniels Faculty of Architecture, Landscape, and Design, University of Toronto, 33 Willcocks Street, Toronto, ON, M5S 3B3, Canada
| | - Yinan Liu
- Graduate Department of Forestry, John H. Daniels Faculty of Architecture, Landscape, and Design, University of Toronto, 33 Willcocks Street, Toronto, ON, M5S 3B3, Canada
| | - Jiaxing Huang
- Graduate Department of Forestry, John H. Daniels Faculty of Architecture, Landscape, and Design, University of Toronto, 33 Willcocks Street, Toronto, ON, M5S 3B3, Canada
| | - Zahra Sarshar
- Centre for Biocomposite and Biomaterials Processing, Department of Mechanical and Industrial Engineering, Faculty of Applied Science and Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada
| | - Mohini Sain
- Graduate Department of Forestry, John H. Daniels Faculty of Architecture, Landscape, and Design, University of Toronto, 33 Willcocks Street, Toronto, ON, M5S 3B3, Canada; Centre for Biocomposite and Biomaterials Processing, Department of Mechanical and Industrial Engineering, Faculty of Applied Science and Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada.
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25
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Wang X, Wang H, Niu Y, Wang Y, Feng L. A facile AIE fluorescent probe for broad range of pH detection. Spectrochim Acta A Mol Biomol Spectrosc 2020; 226:117650. [PMID: 31634712 DOI: 10.1016/j.saa.2019.117650] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 10/05/2019] [Accepted: 10/09/2019] [Indexed: 06/10/2023]
Abstract
Detection of pH has received more and more attention in various fields. Currently, a hot research topic is focused on how to use a facile fluorescent dye to achieve a wide range and accurate pH detection. Herein, we reported a simple fluorescence probe for pH detection with wide range and accuracy based on the Aggregation-Induced Emission (AIE) characteristics. The probe 2-oxo-N'-(2-(quinolin-8-yloxy)acetyl)-2H-chromene-3-carbo- hydrazide (CHBQ) as comprised of coumarin and quinoline as the electron donor and acceptor, N, N'-diformylhydrazine bond as the linking group, respectively. The probe displays good AIE characteristics under water content up to 99% in mixed medium. Furthermore, it can identify acid and base as fast as 30 s by color change of the solution under UV365 nm lamp. The detection of the probe for pH was hardly interfered with other ions. What's more, the probe CHBQ can be designed to be a broad range test paper of pH detection, which has a great practical value.
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Affiliation(s)
- Xiaoju Wang
- Institute of Molecular Science, Chemical Biology and Molecular Engineering, Laboratory of Education Ministry, Shanxi University, Taiyuan, 030006, PR China
| | - Haoping Wang
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, PR China
| | - Yan Niu
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, PR China
| | - Yunxia Wang
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, PR China.
| | - Liheng Feng
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, PR China.
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26
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Patino T, Porchetta A, Jannasch A, Lladó A, Stumpp T, Schäffer E, Ricci F, Sánchez S. Self-Sensing Enzyme-Powered Micromotors Equipped with pH-Responsive DNA Nanoswitches. Nano Lett 2019; 19:3440-3447. [PMID: 30704240 DOI: 10.1021/acs.nanolett.8b04794] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Biocatalytic micro- and nanomotors have emerged as a new class of active matter self-propelled through enzymatic reactions. The incorporation of functional nanotools could enable the rational design of multifunctional micromotors for simultaneous real-time monitoring of their environment and activity. Herein, we report the combination of DNA nanotechnology and urease-powered micromotors as multifunctional tools able to swim, simultaneously sense the pH of their surrounding environment, and monitor their intrinsic activity. With this purpose, a FRET-labeled triplex DNA nanoswitch for pH sensing was immobilized onto the surface of mesoporous silica-based micromotors. During self-propulsion, urea decomposition and the subsequent release of ammonia led to a fast pH increase, which was detected by real-time monitoring of the FRET efficiency through confocal laser scanning microscopy at different time points (i.e., 30 s, 2 and 10 min). Furthermore, the analysis of speed, enzymatic activity, and propulsive force displayed a similar exponential decay, matching the trend observed for the FRET efficiency. These results illustrate the potential of using specific DNA nanoswitches not only for sensing the micromotors' surrounding microenvironment but also as an indicator of the micromotor activity status, which may aid to the understanding of their performance in different media and in different applications.
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Affiliation(s)
- Tania Patino
- Institute for Bioengineering of Catalonia (IBEC) , The Barcelona Institute of Science and Technology , Baldiri Reixac 10-12 , Barcelona 08028 , Spain
| | - Alessandro Porchetta
- Department of Chemistry , University of Rome , Tor Vergata, Via della Ricerca Scientifica 1 , Rome 00133 , Italy
| | - Anita Jannasch
- Center for Plant Molecular Biology (ZMBP) , University of Tübingen , Auf der Morgenstelle 32 , Tübingen 72076 , Germany
| | - Anna Lladó
- Advanced Digital Microscopy , Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology , Barcelona 08010 , Spain
| | - Tom Stumpp
- Center for Plant Molecular Biology (ZMBP) , University of Tübingen , Auf der Morgenstelle 32 , Tübingen 72076 , Germany
| | - Erik Schäffer
- Center for Plant Molecular Biology (ZMBP) , University of Tübingen , Auf der Morgenstelle 32 , Tübingen 72076 , Germany
| | - Francesco Ricci
- Department of Chemistry , University of Rome , Tor Vergata, Via della Ricerca Scientifica 1 , Rome 00133 , Italy
| | - Samuel Sánchez
- Institute for Bioengineering of Catalonia (IBEC) , The Barcelona Institute of Science and Technology , Baldiri Reixac 10-12 , Barcelona 08028 , Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA) , Pg. Lluís Companys 23 , Barcelona 08010 , Spain
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27
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Luka GS, Nowak E, Kawchuk J, Hoorfar M, Najjaran H. Portable device for the detection of colorimetric assays. R Soc Open Sci 2017; 4:171025. [PMID: 29291093 PMCID: PMC5717667 DOI: 10.1098/rsos.171025] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 09/27/2017] [Indexed: 05/03/2023]
Abstract
In this work, a low-cost, portable device is developed to detect colorimetric assays for in-field and point-of-care (POC) analysis. The device can rapidly detect both pH values and nitrite concentrations of five different samples, simultaneously. After mixing samples with specific reagents, a high-resolution digital camera collects a picture of the sample, and a single-board computer processes the image in real time to identify the hue-saturation-value coordinates of the image. An internal light source reduces the effect of any ambient light so the device can accurately determine the corresponding pH values or nitrite concentrations. The device was purposefully designed to be low-cost, yet versatile, and the accuracy of the results have been compared to those from a conventional method. The results obtained for pH values have a mean standard deviation of 0.03 and a correlation coefficient R2 of 0.998. The detection of nitrites is between concentrations of 0.4-1.6 mg l-1, with a low detection limit of 0.2 mg l-1, and has a mean standard deviation of 0.073 and an R2 value of 0.999. The results represent great potential of the proposed portable device as an excellent analytical tool for POC colorimetric analysis and offer broad accessibility in resource-limited settings.
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Affiliation(s)
- G. S. Luka
- School of Engineering, University of British Columbia, 333 University Way, Kelowna, British Columbia, CanadaV1V1V7
| | | | | | | | - H. Najjaran
- School of Engineering, University of British Columbia, 333 University Way, Kelowna, British Columbia, CanadaV1V1V7
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28
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Luka GS, Nowak E, Kawchuk J, Hoorfar M, Najjaran H. Portable device for the detection of colorimetric assays. R Soc Open Sci 2017; 4:171025. [PMID: 29291093 DOI: 10.5061/dryad.pj475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 09/27/2017] [Indexed: 05/19/2023]
Abstract
In this work, a low-cost, portable device is developed to detect colorimetric assays for in-field and point-of-care (POC) analysis. The device can rapidly detect both pH values and nitrite concentrations of five different samples, simultaneously. After mixing samples with specific reagents, a high-resolution digital camera collects a picture of the sample, and a single-board computer processes the image in real time to identify the hue-saturation-value coordinates of the image. An internal light source reduces the effect of any ambient light so the device can accurately determine the corresponding pH values or nitrite concentrations. The device was purposefully designed to be low-cost, yet versatile, and the accuracy of the results have been compared to those from a conventional method. The results obtained for pH values have a mean standard deviation of 0.03 and a correlation coefficient R2 of 0.998. The detection of nitrites is between concentrations of 0.4-1.6 mg l-1, with a low detection limit of 0.2 mg l-1, and has a mean standard deviation of 0.073 and an R2 value of 0.999. The results represent great potential of the proposed portable device as an excellent analytical tool for POC colorimetric analysis and offer broad accessibility in resource-limited settings.
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Affiliation(s)
- G S Luka
- School of Engineering, University of British Columbia, 333 University Way, Kelowna, British Columbia, CanadaV1V1V7
| | - E Nowak
- School of Engineering, University of British Columbia, 333 University Way, Kelowna, British Columbia, CanadaV1V1V7
| | - J Kawchuk
- School of Engineering, University of British Columbia, 333 University Way, Kelowna, British Columbia, CanadaV1V1V7
| | - M Hoorfar
- School of Engineering, University of British Columbia, 333 University Way, Kelowna, British Columbia, CanadaV1V1V7
| | - H Najjaran
- School of Engineering, University of British Columbia, 333 University Way, Kelowna, British Columbia, CanadaV1V1V7
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29
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Kim SD, Koo Y, Yun Y. A Smartphone-Based Automatic Measurement Method for Colorimetric pH Detection Using a Color Adaptation Algorithm. Sensors (Basel) 2017; 17:s17071604. [PMID: 28698532 PMCID: PMC5539506 DOI: 10.3390/s17071604] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 06/26/2017] [Accepted: 07/07/2017] [Indexed: 01/25/2023]
Abstract
This paper proposes a smartphone-based colorimetric pH detection method using a color adaptation algorithm for point-of-care applications. Although a smartphone camera can be utilized to measure the color information of colorimetric sensors, ambient light changes and unknown built-in automatic image correction operations make it difficult to obtain stable color information. This paper utilizes a 3D printed mini light box and performs a calibration procedure with a paper-printed comparison chart and a reference image which overcomes the drawbacks of smartphone cameras and the difficulty in preparing for the calibration procedure. The color adaptation is performed in the CIE 1976 u'v' color space by using the reference paper in order to stabilize the color variations. Non-rigid u'v' curve interpolation is used to produce the high-resolution pH estimate. The final pH value is estimated by using the best-matching method to handle the nonlinear curve properties of multiple color patches. The experimental results obtained using a pH indicator paper show that the proposed algorithm provides reasonably good estimation of pH detection. With paper-printed accurate color comparison charts and smart color adaptation techniques, superior estimation is achieved in the smartphone-based colorimetric pH detection system for point-of-care application.
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Affiliation(s)
- Sung Deuk Kim
- Department of Electronic Engineering Education, Andong National University, 1375 Gyeongdong-ro, Andong, Gyeongsangbuk-do 36729, Korea.
| | - Youngmi Koo
- FIT BEST Laboratory, Department of Chemical, Biological, and Bioengineering, North Carolina A&T State University, 1601 E. Market St., Greensboro, NC 27411, USA.
| | - Yeoheung Yun
- FIT BEST Laboratory, Department of Chemical, Biological, and Bioengineering, North Carolina A&T State University, 1601 E. Market St., Greensboro, NC 27411, USA.
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30
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Liu X, Li T, Wu Q, Yan X, Wu C, Chen X, Zhang G. Carbon nanodots as a fluorescence sensor for rapid and sensitive detection of Cr(VI) and their multifunctional applications. Talanta 2016; 165:216-222. [PMID: 28153245 DOI: 10.1016/j.talanta.2016.12.037] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 12/10/2016] [Accepted: 12/18/2016] [Indexed: 11/18/2022]
Abstract
In this work, carbon nanodots (CDs) were prepared via a green and convenient microwave assisted pyrolysis of ionic liquids (ILs) and ethylenediamine. It was found that the synthesized IL-based CDs (ILCDs) exhibited a superior selective sensitivity for Cr(VI). Photoluminescence (PL) properties of the ILCDs were applied to determine the concentration of Cr(VI), which showed a wide linear range and a low detection limit. We also received promising results by using the ILCDs for Cr(VI) detection in real samples. Moreover, the synthesized ILCDs can also work as a PL nanosensors to determine temperature and pH value in solution.
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Affiliation(s)
- Xue Liu
- Liaoning Province Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, PR China.
| | - Tianze Li
- Liaoning Province Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Qiuhua Wu
- Liaoning Province Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Xiao Yan
- Guangdong Key Laboratory of Membrane Materials and Membrane Separation, Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou 511458, PR China; Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, PR China
| | - Chenglin Wu
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 317000, PR China
| | - Xia Chen
- Liaoning Province Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Guolin Zhang
- Liaoning Province Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, PR China.
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31
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Kumar P, Maikap S, Qiu JT, Jana S, Roy A, Singh K, Cheng HM, Chang MT, Mahapatra R, Chiu HC, Yang JR. Detection of pH and Enzyme-Free H2O2 Sensing Mechanism by Using GdO x Membrane in Electrolyte-Insulator-Semiconductor Structure. Nanoscale Res Lett 2016; 11:434. [PMID: 27680740 PMCID: PMC5040652 DOI: 10.1186/s11671-016-1657-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Accepted: 09/22/2016] [Indexed: 06/06/2023]
Abstract
A 15-nm-thick GdO x membrane in an electrolyte-insulator-semiconductor (EIS) structure shows a higher pH sensitivity of 54.2 mV/pH and enzyme-free hydrogen peroxide (H2O2) detection than those of the bare SiO2 and 3-nm-thick GdO x membranes for the first time. Polycrystalline grain and higher Gd content of the thicker GdO x films are confirmed by transmission electron microscopy (TEM) and X-ray photo-electron spectroscopy (XPS), respectively. In a thicker GdO x membrane, polycrystalline grain has lower energy gap and Gd(2+) oxidation states lead to change Gd(3+) states in the presence of H2O2, which are confirmed by electron energy loss spectroscopy (EELS). The oxidation/reduction (redox) properties of thicker GdO x membrane with higher Gd content are responsible for detecting H2O2 whereas both bare SiO2 and thinner GdO x membranes do not show sensing. A low detection limit of 1 μM is obtained due to strong catalytic activity of Gd. The reference voltage shift increases with increase of the H2O2 concentration from 1 to 200 μM owing to more generation of Gd(3+) ions, and the H2O2 sensing mechanism has been explained as well.
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Affiliation(s)
- Pankaj Kumar
- Department of Electronic Engineering, Chang Gung University (CGU), 259 Wen-Hwa 1st Rd., Kwei-Shan, Tao-Yuan, 333 Taiwan
| | - Siddheswar Maikap
- Department of Electronic Engineering, Chang Gung University (CGU), 259 Wen-Hwa 1st Rd., Kwei-Shan, Tao-Yuan, 333 Taiwan
- Bio-Sensor Lab., Biomedical Engineering Research Center, Department of Electronic Engineering, Chang Gung University, Tao-Yuan, 333 Taiwan
- Center for Reliability Science and Technologies (CReST), Department of Electronic Engineering, Chang Gung University, Tao-Yuan, 333 Taiwan
| | - Jian-Tai Qiu
- Department of Biomedical Sciences, School of Medicine, Chang Gung University (CGU), Tao-Yuan, 333 Taiwan
- Division of Gyn-Oncology, Department of Obs/Gyn, Chang Gung Memorial Hospital (CGMH), Tao-Yuan, 333 Taiwan
| | - Surajit Jana
- Department of Electronic Engineering, Chang Gung University (CGU), 259 Wen-Hwa 1st Rd., Kwei-Shan, Tao-Yuan, 333 Taiwan
| | - Anisha Roy
- Department of Electronic Engineering, Chang Gung University (CGU), 259 Wen-Hwa 1st Rd., Kwei-Shan, Tao-Yuan, 333 Taiwan
| | - Kanishk Singh
- Department of Electronic Engineering, Chang Gung University (CGU), 259 Wen-Hwa 1st Rd., Kwei-Shan, Tao-Yuan, 333 Taiwan
| | - Hsin-Ming Cheng
- Material and Chemical Research Laboratories (MRL), Industrial Technology Research Institute (ITRI), Hsinchu, 195 Taiwan
| | - Mu-Tung Chang
- Material and Chemical Research Laboratories (MRL), Industrial Technology Research Institute (ITRI), Hsinchu, 195 Taiwan
| | - Rajat Mahapatra
- Department of Electronics and Communications Engineering, National Institute of Technology (NIT), Durgapur, 713209 India
| | - Hsien-Chin Chiu
- Department of Electronic Engineering, Chang Gung University (CGU), 259 Wen-Hwa 1st Rd., Kwei-Shan, Tao-Yuan, 333 Taiwan
| | - Jer-Ren Yang
- Department of Materials Science and Engineering, National Taiwan University (NTU), Taipei, 106 Taiwan
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Di W, Czarny RS, Fletcher NA, Krebs MD, Clark HA. Comparative Study of Poly (ε-Caprolactone) and Poly(Lactic-co-Glycolic Acid) -Based Nanofiber Scaffolds for pH-Sensing. Pharm Res 2016; 33:2433-44. [PMID: 27380188 PMCID: PMC5007178 DOI: 10.1007/s11095-016-1987-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 06/27/2016] [Indexed: 01/12/2023]
Abstract
PURPOSE This study aims to develop biodegradable and biocompatible polymer-based nanofibers that continuously monitor pH within microenvironments of cultured cells in real-time. In the future, these fibers will provide a scaffold for tissue growth while simultaneously monitoring the extracellular environment. METHODS Sensors to monitor pH were created by directly electrospinning the sensor components within a polymeric matrix. Specifically, the entire fiber structure is composed of the optical equivalent of an electrode, a pH-sensitive fluorophore, an ionic additive, a plasticizer, and a polymer to impart mechanical stability. The resulting poly(ε-caprolactone) (PCL) and poly(lactic-co-glycolic acid) (PLGA) based sensors were characterized by morphology, dynamic range, reversibility and stability. Since PCL-based nanofibers delivered the most desirable analytical response, this matrix was used for cellular studies. RESULTS Electrospun nanofiber scaffolds (NFSs) were created directly out of optode material. The resulting NFS sensors respond to pH changes with a dynamic range centered at 7.8 ± 0.1 and 9.6 ± 0.2, for PCL and PLGA respectively. NFSs exhibited multiple cycles of reversibility with a lifetime of at least 15 days with preservation of response characteristics. By comparing the two NFSs, we found PCL-NFSs are more suitable for pH sensing due to their dynamic range and superior reversibility. CONCLUSION The proposed sensing platform successfully exhibits a response to pH and compatibility with cultured cells. NSFs will be a useful tool for creating 3D cellular scaffolds that can monitor the cellular environment with applications in fields such as drug discovery and tissue engineering.
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Affiliation(s)
- Wenjun Di
- Department of Pharmaceutical Sciences, Northeastern University, Boston, Massachusetts, 02115, USA
| | - Ryan S Czarny
- Chemical and Biological Engineering, Colorado School of Mines, Golden, Colorado, 80401, USA
| | - Nathan A Fletcher
- Chemical and Biological Engineering, Colorado School of Mines, Golden, Colorado, 80401, USA
| | - Melissa D Krebs
- Chemical and Biological Engineering, Colorado School of Mines, Golden, Colorado, 80401, USA
| | - Heather A Clark
- Department of Pharmaceutical Sciences, Northeastern University, Boston, Massachusetts, 02115, USA.
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Si Y, Grazon C, Clavier G, Rieger J, Audibert JF, Sclavi B, Méallet-Renault R. Rapid and accurate detection of Escherichia coli growth by fluorescent pH-sensitive organic nanoparticles for high-throughput screening applications. Biosens Bioelectron 2015; 75:320-7. [PMID: 26334591 DOI: 10.1016/j.bios.2015.08.028] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 08/03/2015] [Accepted: 08/14/2015] [Indexed: 12/31/2022]
Abstract
Rapid detection of bacterial growth is an important issue in the food industry and for medical research. Here we present a novel kind of pH-sensitive fluorescent nanoparticles (FANPs) that can be used for the rapid and accurate real-time detection of Escherichia coli growth. These organic particles are designed to be non-toxic and highly water-soluble. Here we show that the coupling of pH sensitive fluoresceinamine to the nanoparticles results in an increased sensitivity to changes in pH within a physiologically relevant range that can be used to monitor the presence of live bacteria. In addition, these FANPs do not influence bacterial growth and are stable over several hours in a complex medium and in the presence of bacteria. The use of these FANPs allows for continuous monitoring of bacterial growth via real-time detection over long time scales in small volumes and can thus be used for the screening of a large number of samples for high-throughput applications such as screening for the presence of antibiotic resistant strains.
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Affiliation(s)
- Yang Si
- PPSM, CNRS UMR 8531, ENS-Cachan, 61 av President Wilson, 94230 Cachan, France; LBPA, CNRS UMR 8113, ENS-Cachan, 61 av President Wilson, 94230 Cachan, France
| | - Chloé Grazon
- PPSM, CNRS UMR 8531, ENS-Cachan, 61 av President Wilson, 94230 Cachan, France
| | - Gilles Clavier
- PPSM, CNRS UMR 8531, ENS-Cachan, 61 av President Wilson, 94230 Cachan, France
| | - Jutta Rieger
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut Parisien de Chimie Moléculaire, Equipe Chimie des Polymères, 4 Place Jussieu, F-75005 Paris, France
| | | | - Bianca Sclavi
- LBPA, CNRS UMR 8113, ENS-Cachan, 61 av President Wilson, 94230 Cachan, France.
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