SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Yongyun Mao,Yibo Gao,Shanshan Wu,Siying Wu,Jiayan Shi,Bingpu Zhou,Yanqing Tian
In this work, we presented a facile and cost-effective approach to fabricate novel PtTFPP/PDMS micro-pillar array (MPA) sensor film with I 0 /I 100 for gaseous oxygen and dissolved oxygen are 288 and 84, respectively. The sensitivity of the sensor film exhibited over ∼30-fold increment when compared with contemporary PtTFPP/PDMS-based oxygen sensors. The detection limit was as low as 0.10 μmol/L, which means that the ultrasensitive sensor films enable reliable monitoring of dissolved oxygen (DO) within nanomolar concentration ranges that are particularly difficult to achieve in previous works. Furthermore, the remarkably light intensity-changing characteristic of the sensing film under lower O 2 partial pressures facilitates convenient identification of O 2 concentrations even with the naked eye. We believe that the proposed device could be a promising candidate in various oxygen sensing fields such as nearly anoxic systems, unsteady pressure measurement and unsteady flow visualization, etc.
研究领域:
材料科学
·
传感技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS
·
2018
·Vol. 18
·期 11
·3752
·
IF 2.475
Jiaze Li,Yuan Qiao,Tingting Pan,Ke Zhong,Jiaxing Wen,Shanshan Wu,Fengyu Su,Yanqing Tian
New amphiphilic star or multi-arm block copolymers with different structures were synthesized for enabling the use of hydrophobic oxygen probe of platinum (II)-tetrakis (pentafluorophenyl) porphyrin (PtTFPP) for bioanalysis. The amphiphilic star polymers were prepared through the Atom Transfer Radical Polymerization (ATRP) method by using hydrophilic 4-arm polyethylene glycol (4-arm-PEG) as an initiator. Among the five block copolymers,P1series (P1a,P1b, andP1c) andP3possess fluorine-containing moieties to improve the oxygen sensitivity with its excellent capacity to dissolve and carry oxygen. A polymerP2without fluorine units was also synthesized for comparison. The structure-property relationship was investigated. Under nitrogen atmosphere, high quantum efficiency of PtTFPP in fluorine-containing micelles could reach to 22% and long lifetime could reach to 76 μs. One kind of representative PtTFPP-containing micelles was used to detect the respiration ofEscherichia coli(E. coli) JM109 and macrophage cell J774A.1 by a high throughput plate reader. In vivo hypoxic imaging of tumor-bearing mice was also achieved successfully. This study demonstrated that using well-designed fluoropolymers to load PtTFPP could achieve high oxygen sensing properties, and long lifetime, showing the great capability for further in vivo sensing and imaging.Keywords:dissolved oxygen sensors;fluoropolymers;micelles;cell respiration monitoring;tumor imaging
研究领域:
聚合物化学
·
生物分析化学
·
生物医学工程
·
材料科学
·
细胞生物学
·
医学成像
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Da Yang,Zhe Qu,Fei Li,Siyuan Lu
A convenient and less time-consuming approach for developing an optical oxygen sensing film with excellent balance between sensing performance and operating stability is addressed in the current work. In order to achieve better mechanical strength and resistance against ultraviolet (UV) degradation, a series of oxygen sensing films were prepared by embedding Pt (II) meso-tetra (pentafluorophenyl)porphine (PtTFPP) in the hosting copolymer matrices, which comprised different blending ratios of plasticized polyvinyl chloride (PVC) and poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) on polypropylene porous fiber membrane. The microstructure and optical properties of the sensing films were characterized by using scanning electron microscopy (SEM), laser confocal microscopy, and fluorescence spectrometer. Phase delay measurement under different oxygen partial pressure (PO $_{{2}}\text {)}$ and temperature was conducted to evaluate the sensing performance and temperature compensation models of the sensing films for oxygen monitoring. Results show that the response time of the sensing films were all less than 10 s. The sensitivities and detecting ranges of the sensing films were increased and decreased with the reduction in PVC/PVDF-HFP ratio. When PVC/PVDF-HFP ratio reached 1:2, sensing film exhibits the best sensitivity of 0.334 kPa $^{-{1}}$ and the smallest phase reduction rate of 0.0045°/h after 24 h of continuous irradiation by UV light, presenting a promising utilization potentiality in fields of gaseous oxygen detection.
研究领域:
材料科学
·
光学传感
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 25
·e53969
·
IF 3
Jiayan Shi,Chunhua Wei,Mengyu Deng,Lei Liang,Yanqing Tian
Pressure-sensitive paints (PSPs) have been demonstrated to be very important for aerodynamics research. In order to improve the pressure sensitivity and adhesion ability of PSP, herein, a series of fluorine-containing copolymers compositing of an oxygen and pressure-responsive probe derived from platinum(II)-5,10,15,20-tetrakis-(2,3,4,5,6-pentafluorophenyl)-porphyrin (PtTFPP) named as poly[(tBs) a - co -(TFEM) b - co -(PtTFPP-1MA) c ] were synthesized and investigated as PSPs. These PSPs were constructed with different fluorine ratios for the investigation of the effect of fluorine contents on PSPs. Especially, PSP (F 0.33 ) with the trifluoroethyl methacrylate (TFEM) molar ratio of 33% in the copolymers could adhere well to the surface of an aircraft model. F 0.33 showed high oxygen sensitivity ( I 0 / I 100 = 32.87), reasonable response time to oxygen (44 s), high pressure sensitivity ( S P = 0.75%/kPa at 20°C) and low temperature response ( S T = −0.77%/°C at 100 kPa). F 0.33 was further sprayed on the surface of a delta wing of an aircraft model and its pressure response was verified in a wind tunnel. The data from F 0.33 film at the same wind speed and position were close to the pressure data measured by using traditional method using open pressure holes, showing the potential application of these PSPs.
研究领域:
材料科学
·
空气动力学
·
聚合物化学
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）