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面向栽培基质的二氧化钛电极EGFET pH传感器设计
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作者 张西良 高涵 +3 位作者 张家祺 徐云峰 陈成 陆海燕 《排灌机械工程学报》 CSCD 北大核心 2024年第7期743-748,共6页
针对农业生产中栽培基质直接在线检测pH准确性差的问题,采用化学腐蚀法,制备出具有氢离子敏感特性和超亲水特性的二氧化钛(TiO_(2))电极,并且采用退火工艺以提高电极表面硬度;将TiO_(2)电极与金属氧化物场效应晶体管(MOSFET)组合成基于... 针对农业生产中栽培基质直接在线检测pH准确性差的问题,采用化学腐蚀法,制备出具有氢离子敏感特性和超亲水特性的二氧化钛(TiO_(2))电极,并且采用退火工艺以提高电极表面硬度;将TiO_(2)电极与金属氧化物场效应晶体管(MOSFET)组合成基于延伸式栅极场效应晶体管(EGFET)的pH传感器.测试得到传感器灵敏度为0.05063 V/pH,重复性试验的变异系数最大为0.0057.测试结果表明该传感器具有良好的灵敏度、重复性和稳定性.选取4种典型栽培基质进行pH在线检测应用试验,pH检测误差的绝对值最大为0.18,经过温度补偿后误差的绝对值最大为0.11;使用后电极表面的亲水性依旧保持良好.应用试验结果表明,该传感器适用于栽培基质pH在线检测. 展开更多
关键词 ph传感器 二氧化钛电极 延伸式栅极场效应晶体管 栽培基质 ph在线检测
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An Optical Fiber Sensor for Simultaneous Measurement of pO2 and pH
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作者 Baorong Fu Xianwen Zhang +1 位作者 Huimin Cao Zhushanying Zhang 《Open Journal of Applied Sciences》 CAS 2023年第4期579-590,共12页
Whether in the monitoring of critically ill patients such as shock, respiratory failure, brain injury, or in major anesthesia surgeries, it is necessary to evaluate the patient’s pO<sub>2</sub> and pH. An... Whether in the monitoring of critically ill patients such as shock, respiratory failure, brain injury, or in major anesthesia surgeries, it is necessary to evaluate the patient’s pO<sub>2</sub> and pH. An optical fiber sensor presented is capable of monitoring the presence of oxygen partial pressure (pO<sub>2</sub>) and pH in the real-time. The sensor is based on fluorescence sensing of polymer immobilized in the oxygen/pH-sensitive membranes and covalently attached to the optical fiber probe. The design of this sensor uses LED as light source, which is an excitation light source, inducing specific wavelengths of fluorescence on the oxygen/pH-sensitive membrane. The intensity and lifetime of fluorescence are related to the pO<sub>2</sub> and pH. So the pO<sub>2</sub> and pH can be measured by the relationship between the pO<sub>2</sub>/pH values and the intensity and lifetime of fluorescence. The signal conditioning system based on DSP and STM32 was used to store and process data, and display test values. The response of the sensor for pO<sub>2</sub> and pH monitoring with nitrogen (N<sub>2</sub>) as a balancing gas in the laboratory was performed. Finally, the oxygen/pH sensing scheme presented in this work is intended for using in biological, medical and environmental applications. 展开更多
关键词 Optical Fiber sensor OXYGEN ph FLUORESCENCE
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集成PVB修饰Ag/AgCl参比电极的pH传感硅探针阵列
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作者 王卓 刘景全 《传感器与微系统》 CSCD 北大核心 2024年第9期68-70,共3页
介绍了一种带有集成Ag/AgCl参比电极的硅记录探针,通过表面聚乙烯醇缩丁醛(PVB)的修饰实现稳定的pH传感,用于应用神经科学。集成参比电极通过恒流电化学镀法实现银层的制备以及氯化,滴涂的PVB主要用作参比电极的保护膜,参比电极面积为0.... 介绍了一种带有集成Ag/AgCl参比电极的硅记录探针,通过表面聚乙烯醇缩丁醛(PVB)的修饰实现稳定的pH传感,用于应用神经科学。集成参比电极通过恒流电化学镀法实现银层的制备以及氯化,滴涂的PVB主要用作参比电极的保护膜,参比电极面积为0.44 mm^(2)。最终硅记录探针的pH灵敏度为53.13 mV/pH,电位漂移为8 000 s下20 mV,并且探针工艺与硅基探针高度融合。总之,集成参比电极并且提高其稳定性对于生物传感器以及脑疾病诊断生物标志物的电化学检测具有重要意义。 展开更多
关键词 Ag/AgCl参比电极 ph传感器 生物稳定性
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基于水凝胶溶胀特性的全光纤萨格纳克环pH传感器
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作者 卢琪 刘正宇 +2 位作者 薛力芳 陈志宏 张海伟 《光电技术应用》 2024年第4期42-48,共7页
根据水凝胶在不同pH溶液中的溶胀程度不同,研制出了一种基于水凝胶溶胀应力的光纤萨格纳克环pH传感器,选择溶胀性能较好的聚丙烯酰胺水凝胶作为传感媒介。在不同pH溶液中,水凝胶溶胀的差异性引起保偏光纤的轴向应力发生变化,使得萨格纳... 根据水凝胶在不同pH溶液中的溶胀程度不同,研制出了一种基于水凝胶溶胀应力的光纤萨格纳克环pH传感器,选择溶胀性能较好的聚丙烯酰胺水凝胶作为传感媒介。在不同pH溶液中,水凝胶溶胀的差异性引起保偏光纤的轴向应力发生变化,使得萨格纳克环的输出光谱发生偏移,通过表征光谱的偏移量实现pH传感。该传感器在pH为2~12的范围内呈线性响应,灵敏度为0.947nm/pH。实验结果表明,该传感器具有良好的鲁棒性、稳定性和重复性。 展开更多
关键词 ph传感器 智能水凝胶 萨格纳克干涉仪 光纤传感 应力
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聚苯胺/MXene@聚丙烯复合非织造柔性pH值传感器的制备及其传感性能
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作者 朱祥祥 孙辉 于斌 《浙江理工大学学报(自然科学版)》 2024年第4期419-426,共8页
为制备基于聚丙烯纺黏非织造材料(Polypropylene spunbonded nonwoven fabric,PP SF)的双电极柔性pH值传感器,在PP SF表面涂覆油性聚氨酯(Oil-based polyurethane,OPU),制备得到OPU/PP SF,采用丝网印刷技术将作为参比电极的银/氯化银(Ag... 为制备基于聚丙烯纺黏非织造材料(Polypropylene spunbonded nonwoven fabric,PP SF)的双电极柔性pH值传感器,在PP SF表面涂覆油性聚氨酯(Oil-based polyurethane,OPU),制备得到OPU/PP SF,采用丝网印刷技术将作为参比电极的银/氯化银(Ag/AgCl)浆料和导电碳浆料分别移印至OPU/PP SF表面;利用化学氧化聚合法制备了酸掺杂聚苯胺(Polyaniline,PANI),将其与经超疏水改性的F-Ti_(3)C_(2)T_(x)MXene结合,再涂覆在C层表面,形成PANI/F-Ti_(3)C_(2)T_(x)MXene@PP SF柔性pH值传感器。结果表明:PANI/F-Ti_(3)C_(2)T_(x)MXene@PP SF柔性pH值传感器表面呈现珊瑚状结构,在pH值为2~10时,PANI/F-Ti_(3)C_(2)T_(x)MXene@PP SF柔性pH值传感器表现出良好的力学性能,其拉伸强度和断裂伸长率均比PP SF有所提高,灵敏度(-37.07 mV/pH)高,线性度(R2=0.98)好,具有低电位变化率(0.092 mV/h)和良好的重现性(灵敏度标准偏差为0.36%)。该研究可为基于聚丙烯纺黏非织造材料基材的柔性pH值传感器的研究提供参考。 展开更多
关键词 聚丙烯纺黏非织造材料 柔性ph值传感器 聚苯胺 MXene 银/氯化银 丝网印刷
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一种新型比率荧光毛细管pH传感器的制备及性能
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作者 许盼英 李天依 +2 位作者 王小卉 黎喆 王贵生 《发光学报》 EI CAS CSCD 北大核心 2024年第1期177-183,共7页
实时便捷的pH检测对于环境监测和医学诊断等领域具有重要应用价值。本文通过溶胶-凝胶法制备了一种比率荧光毛细管pH传感器。该传感器以2.8-羟基芘-1,3,6-三磺酸三钠盐(8-hydroxy-pyrene-1,3,6-tri-sulfonate,HPTS)作为pH敏感的荧光探针... 实时便捷的pH检测对于环境监测和医学诊断等领域具有重要应用价值。本文通过溶胶-凝胶法制备了一种比率荧光毛细管pH传感器。该传感器以2.8-羟基芘-1,3,6-三磺酸三钠盐(8-hydroxy-pyrene-1,3,6-tri-sulfonate,HPTS)作为pH敏感的荧光探针,利用HPTS与十六烷基三甲基溴化铵(hexadecyl trimethyl ammonium bromide,CTAB)结合形成HPTS-IP离子对,然后将离子对分散于溶胶-凝胶中,并将其固定于毛细管内壁即制得比率荧光毛细管pH传感器。该传感器利用HPTS在双激发带下的发射强度比值实现比率荧光检测,当pH从5.0上升至8.0时,HPTS的荧光强度比率随pH值增加逐渐增强,pKa值为6.95,通过分析HPTS的比率荧光强度变化可间接监测pH波动。该传感器具有较好的pH敏感性、稳定性和可逆性,且可快速、灵活、便捷地进行实际操作,在环境保护和生物医学领域的pH监测分析方面拥有良好的应用前景。 展开更多
关键词 荧光探针 光学传感器 ph检测 毛细管 比率荧光
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栽培基质超亲水pH传感器测量误差影响因素分析与补偿 被引量:1
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作者 陈成 张西良 +3 位作者 张亚磊 苏小青 徐坤 徐云峰 《农业机械学报》 EI CAS CSCD 北大核心 2023年第3期356-362,共7页
栽培基质pH值是设施园艺中重要的生产过程信息之一。针对栽培基质pH值在线检测误差大、结果易受基质含水率和基质成分影响的问题,基于超亲水pH传感器,以泥炭、蛭石基质为原料,以配置的不同质量比和不同含水率的栽培基质为试验对象,开展... 栽培基质pH值是设施园艺中重要的生产过程信息之一。针对栽培基质pH值在线检测误差大、结果易受基质含水率和基质成分影响的问题,基于超亲水pH传感器,以泥炭、蛭石基质为原料,以配置的不同质量比和不同含水率的栽培基质为试验对象,开展了栽培基质超亲水pH传感器pH值测量试验研究。结果发现:栽培基质的质量含水率(θ_(m))降低会引起超亲水pH传感器的pH值测量值线性降低和pH值测量误差线性增加,其测量误差绝对值最大为0.81,显著低于锑电极pH传感器(测量误差绝对值最大为2.15);超亲水pH传感器的测量误差受混合基质中泥炭、蛭石质量比的影响相对较小,由基质成分变化导致的测量误差最大变化为0.23,显著低于锑电极pH传感器(最大变化为1.10)。在此基础上建立了栽培基质超亲水pH传感器的测量误差补偿模型,并在采集的栽培基质中进行了应用试验;补偿前测量误差绝对值最大为0.32,补偿后降为0.18,测量误差进一步降低,验证了超亲水pH传感器及其测量误差补偿模型的有效性。研究结果为实现栽培基质pH值快速、准确在线检测奠定了基础。 展开更多
关键词 栽培基质 ph传感器 超亲水 在线检测 测量误差
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基于MSER仿射变换配准的农用柔性pH芯片性能优化
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作者 张淼 王丽茹 +2 位作者 李浩榛 路逍 刘刚 《农业机械学报》 EI CAS CSCD 北大核心 2023年第5期288-294,386,共8页
针对柔性pH芯片复合结构多层打印制备过程的配准偏差严重,限制其农用pH值在线监测精度及稳定性问题,比较分析了MSER仿射变换模型对“叠层复合结构”柔性pH芯片性能的影响,分析了配准后柔性pH芯片在基质培番茄根系pH值在线监测应用中的... 针对柔性pH芯片复合结构多层打印制备过程的配准偏差严重,限制其农用pH值在线监测精度及稳定性问题,比较分析了MSER仿射变换模型对“叠层复合结构”柔性pH芯片性能的影响,分析了配准后柔性pH芯片在基质培番茄根系pH值在线监测应用中的可行性。试验结果表明:MSER仿射变换模型配准后,农用柔性芯片加工最小线宽和线间距分别为90、500μm,芯片加工平均相对误差可控制在25%以内;配准后,农用柔性pH传感器灵敏度达到了每单位pH值-61.9 mV,响应范围为2.0~10.0,与商用玻璃pH电极的测量绝对误差小于0.15,相对误差小于4.1%;基质培番茄根系pH值监测试验中,自制柔性芯片与商用pH电极的测量结果具有较好一致性,同步测定结果的绝对误差小于0.09,相对误差小于1.5%,RMSE仅为0.05。MSER仿射变换配准方法可有效提高“叠层复合结构”农用打印柔性传感芯片的制备精度及传感检测准确性。 展开更多
关键词 ph值在线监测 柔性ph芯片 最大稳定极值区域 仿射变换 3D打印多层配准
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Advances in flexible and wearable pH sensors for wound healing monitoring 被引量:1
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作者 Mei Qin Hao Guo +2 位作者 Zhang Dai Xu Yan Xin Ning 《Journal of Semiconductors》 EI CAS CSCD 2019年第11期77-84,共8页
Wound healing has been recognized as a complex and dynamic regeneration process and attracted increasing interests on its management.For effective wound healing management,a continuous monitoring on the wound healing ... Wound healing has been recognized as a complex and dynamic regeneration process and attracted increasing interests on its management.For effective wound healing management,a continuous monitoring on the wound healing based on sensors is essential.Since pH has been found to play an important role on wound healing process,a variety of pH sensors systems for wound healing monitoring have been greatly developed in recent years.Among these pH sensors,flexible and wearable pH sensors which can be incorporated with wound dressing have gained much attention.In this review,the recent advances in the development of flexible and wearable pH sensors for wound healing monitoring have been comprehensive summarized from the range of optical and electrochemical bases. 展开更多
关键词 ph sensor WOUND HEALING MONITORING FLEXIBLE and WEARABLE sensors optical and electrochemical mechanism
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栽培基质pH原位检测温湿度双补偿方法 被引量:2
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作者 徐坤 肖凯 +2 位作者 袁贵杰 徐云峰 张西良 《排灌机械工程学报》 CSCD 北大核心 2023年第12期1276-1282,共7页
针对栽培基质pH原位检测过程中基质温度和湿度影响导致的测量误差大的问题,提出了一种栽培基质pH原位检测温湿度双补偿方法.以典型栽培基质(泥炭、蛭石)为目标材料,选用自制的全固态pH传感器,首先建立传感器温度补偿数学模型,在此基础上... 针对栽培基质pH原位检测过程中基质温度和湿度影响导致的测量误差大的问题,提出了一种栽培基质pH原位检测温湿度双补偿方法.以典型栽培基质(泥炭、蛭石)为目标材料,选用自制的全固态pH传感器,首先建立传感器温度补偿数学模型,在此基础上,分别试验研究了湿度变化对土壤各种类型栽培基质pH原位测定结果的变化影响及其规律,并分别建立了各种类型栽培基质中的pH原位测定温湿度控制双补偿数学模型.最后,利用栽培植物基质pH原位测定的试验方法,对所建立的双补偿数学模型结果进行了评价和分析.试验研究结果分析显示,针对土壤泥炭基质和土壤蛭石基质,通过温湿度双补偿算法处理后,pH原位检测的测量绝对误差从-1.79~0.72降低到0.16~0.27,相对误差从-32.84%~11.45%降低到2.66%~4.95%,整体测量误差水平已达到行业标准《土壤pH的测定》(NY/T 1377—2007)规定的精度要求. 展开更多
关键词 栽培基质 温度补偿 湿度补偿 原位检测 ph传感器
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Palladium nanoparticles/wool keratin-assisted carbon composite-modified flexible and disposable electrochemical solid-state pH sensor 被引量:1
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作者 Wenli Zhang Xiaotian Liu +8 位作者 Youhui Lin Liyun Ma Linqing Kong Guangzong Min Ronghui Wu Sharwari K.Mengane Likun Yang Aniruddha B.Patil Xiang Yang Liu 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第2期634-640,共7页
Several p H-dependent processes and reactions take place in the human body;hence,the p H of body fluids is the best indicator of disturbed health conditions.However,accurate and real-time diagnosis of the p H of body ... Several p H-dependent processes and reactions take place in the human body;hence,the p H of body fluids is the best indicator of disturbed health conditions.However,accurate and real-time diagnosis of the p H of body fluids is complicated because of limited commercially available p H sensors.Hence,we aimed to prepare a flexible,transparent,disposable,userfriendly,and economic strip-based solid-state p H sensor using palladium nanoparticles(Pd NPs)/N-doped carbon(NC)composite material.The Pd NPs/NC composite material was synthesized using wool keratin(WK)as a precursor.The insitu prepared Pd NPs played a key role in the controlled switching of protein structure to the N-doped carbon skeleton withπ–πarrangement at the mesoscale level,which mimics the A–B type polymeric structure,and hence,is highly susceptible to H+ions.The optimized carbonization condition in the presence of Pd NPs showed that the material obtained using a modified Ag/Ag Cl reference electrode had the highest p H sensitivity with excellent stability and durability.The optimized p H sensor showed high specificity and selectivity with a sensitivity of 55 m V/p H unit and a relative standard deviation of 0.79%.This study is the first to synthesize Pd NPs using WK as a stabilizing and reducing agent.The applicability of the sensor was investigated for biological samples,namely,saliva and gastric juices.The proposed protocol and material have implications in solid-state chemistry,where biological material will be the best choice for the synthesis of materials with anticipated performance. 展开更多
关键词 palladium nanoparticle electrochemical sensor solid-state ph sensor flexible strip sensor
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A NEW SOLVENT POLYMERIC MEMBRANE pH SENSOR WITH WIDE LINEAR pH RANGE 被引量:1
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作者 Ruo YUAN Ya Qin CHAI +1 位作者 Liang LIU Ru Qin YU 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第10期837-840,共4页
A new solvent polymeric membrane (SPM)pH2sensor based on 4,4'-bis (N, N-didecylamino)methyl)azobenzene as neutral carricr has been reported. It has excellent pH response characteristics with the linear response ra... A new solvent polymeric membrane (SPM)pH2sensor based on 4,4'-bis (N, N-didecylamino)methyl)azobenzene as neutral carricr has been reported. It has excellent pH response characteristics with the linear response range (1.7—13.2)much wider than that of similar SPM pH sensors reported so far. The sensor has a theoretical Nernstian response of 57.4+0.2V/pH(at 20℃)without super—Nernstian response phenomenon. 展开更多
关键词 ph A NEW SOLVENT POLYMERIC MEMBRANE ph sensor WITH WIDE LINEAR ph RANGE SPM
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Study on the Data Acquisition System for the pH Sensor
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作者 Chung-We Pan Jung-Chuan Chou +1 位作者 Tai-Ping Sun Shen-Kan Hsiung 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2006年第A03期268-269,共2页
This study reveals the successful design of the data acquisition system for pH sensors.The data acquisition system includes an instrumentation amplifier,a low pass filter and a calculation program.The instrumentation ... This study reveals the successful design of the data acquisition system for pH sensors.The data acquisition system includes an instrumentation amplifier,a low pass filter and a calculation program.The instrumentation amplifier used as the readout circuit has many advantages,including high input impedance,high gain,low output impedance,high CMRR and high bandwidth.The low pass filter is employed to cancel the circuit noise.The calculation program uses the two-point calibration method to calculate the sample concentration.Furthermore,this study employs Boolean function to cancel error signals.As indicated by experimental results,the readout circuit obtains the sensing signal and the calculation program calculates the pH value.Hence,this study successfully fabricates an effective data acquisition system for pH sensors. 展开更多
关键词 ph sensor data acquisition system calculation program boolean function
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一种涂覆水凝胶的模间干涉型光纤pH传感器
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作者 范元籍 程贵东 +3 位作者 王贵禹 吴垚 陈雪峰 于秀娟 《黑龙江大学自然科学学报》 2023年第5期605-612,共8页
为了实现pH值测量的微型化和智能化,提出了一种涂覆水凝胶的模间干涉型光纤pH传感器,满足了对光纤pH传感器结构紧凑、灵敏度高、稳定性好的需求。模间干涉型光纤干涉仪采用标准单模光纤错位熔接制得,对干涉仪进行拉锥提高其对外界折射... 为了实现pH值测量的微型化和智能化,提出了一种涂覆水凝胶的模间干涉型光纤pH传感器,满足了对光纤pH传感器结构紧凑、灵敏度高、稳定性好的需求。模间干涉型光纤干涉仪采用标准单模光纤错位熔接制得,对干涉仪进行拉锥提高其对外界折射率的响应灵敏度。将水凝胶涂覆在拉锥后的光纤干涉仪表面,当传感器周围pH值变化时,会引起感应区折射率的变化进而引起传输光谱发生变化,通过测量干涉仪光谱的漂移即可得到对应溶液的pH值。实验结果表明,传感器拉锥8 000μm后在pH值为1.88~7.61的测量灵敏度为0.76 nm/pH,线性相关系数为0.994。所提出的传感器pH值测量范围广、灵敏度高且成本较低,在pH值检测中具有广阔的应用前景。 展开更多
关键词 光纤传感器 ph传感器 模间干涉 光纤拉锥
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铜金属纳米簇在pH检测中的应用
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作者 胡娅琪 张博 +2 位作者 张育珍 陈梓欣 秦蓓 《化工科技》 CAS 2023年第1期50-54,共5页
以谷胱甘肽(GSH)为保护剂,通过考察不同反应温度、n(GSH)∶n(硝酸铜)、反应时间合成了荧光性能良好的GSH-Cu NCs。该GSH-Cu NCs合成简单,pH=4~8.5,GSH-Cu NCs荧光强度与pH呈良好的非线性关系,对pH响应良好,且具有较好的可逆性和选择性,... 以谷胱甘肽(GSH)为保护剂,通过考察不同反应温度、n(GSH)∶n(硝酸铜)、反应时间合成了荧光性能良好的GSH-Cu NCs。该GSH-Cu NCs合成简单,pH=4~8.5,GSH-Cu NCs荧光强度与pH呈良好的非线性关系,对pH响应良好,且具有较好的可逆性和选择性,为构建实时、便捷的pH传感分析提供了平台。 展开更多
关键词 谷胱甘肽 铜纳米簇 ph传感
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Fabrication of Congo Red/Oxidized Porous Silicon (CR/OPS) pH-Sensors
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作者 Abdel-Hady Kashyout Hesham M. A. Soliman +1 位作者 Marwa Nabil Ahmed A. Bishara 《Materials Sciences and Applications》 2013年第8期79-87,共9页
The fabrication of nano porous silicon, nPSi, using alkali etching process has been studied and carried out. The surface chemistry of anisotropic etching of n-type Si-wafer is reviewed and the anisotropic chemical etc... The fabrication of nano porous silicon, nPSi, using alkali etching process has been studied and carried out. The surface chemistry of anisotropic etching of n-type Si-wafer is reviewed and the anisotropic chemical etching of silicon in alkaline solution using wetting agents is discussed. Transformation of crystallographic plane of n-Si (211) to nPSi (100) has occurred on using n-propanol as wetting agent. The rate of pore formation was 0.02478 - 0.02827 μm/min, which was heavily dependent upon the concentration of the etchant containing wetting agents, allowing patterned porous silicon formation through selective doping of the substrate. A particle size of 15 nm for porous nano-silicon was calculated from the XRD data. Porosity of PS layers is about 10%. Pore diameter and porous layer thickness are 0.0614 nm and 16 μm, respectively. The energy gap of the produced porous silicon is 3.3 eV. Furthermore, the combination of PS with Congo Red, which are nanostructured due to their deposition within the porous matrix is discussed. Such nano compounds offer broad avenue of new and interesting properties depending on the involved materials as well as on their morphology. Chemical route was utilized as the host material to achieve pores filling. They were impregnated with Congo Red, which gave good results for the porous silicon as a promising pH sensor. 展开更多
关键词 Nano POROUS Silicon ANISOTROPIC ETCHING Process ALKALI ETCHING CONGO Red ph sensor
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一锅法高效制备橙色荧光氧化石墨烯量子点及其在细胞pH成像中的应用 被引量:2
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作者 王鸿锦 尹桂 《无机化学学报》 SCIE CAS CSCD 北大核心 2023年第7期1338-1348,共11页
以价廉、易得的石墨片为原料,采用改进的Hummers法,简单、快速、高效地制备了具有良好生物相容性的橙色荧光氧化石墨烯量子点(GOQDs)。所制备的GOQDs尺寸约7.2 nm,具有尺寸均匀、晶格间距为0.20 nm的高度结晶的核心和氧化的外围结构。... 以价廉、易得的石墨片为原料,采用改进的Hummers法,简单、快速、高效地制备了具有良好生物相容性的橙色荧光氧化石墨烯量子点(GOQDs)。所制备的GOQDs尺寸约7.2 nm,具有尺寸均匀、晶格间距为0.20 nm的高度结晶的核心和氧化的外围结构。与大多数报道的碳点(CDs)、包裹掺杂碳点(掺杂CDs)、石墨烯量子点(QDS)和GOQDs不同,我们的方法制备的GOQDs显示出橙红色并具有激发波长独立的荧光发射。此外,GOQDs具有pH依赖性荧光发射、强的光漂白抗性、低细胞毒性、良好的水溶性(ρ=10 mg·mL^(-1))和优异的生物相容性。这些特性使其成功应用于细胞pH成像。 展开更多
关键词 氧化石墨烯量子点 橙色荧光 ph传感器 活细胞成像
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Two-Dimensional pH Mapping of a Histamine-Stimulated Gastric Mucosa by Using an Ion Image Sensor in the Guinea Pig
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作者 Yasuko Fukushi Takashi Sakurai +2 位作者 Hidenori Taki Kazuaki Sawada Susumu Terakawa 《Journal of Health Science》 2014年第3期157-163,共7页
In order to examine the hydronium ion (proton)-releasing functions in cells, [pH]out (extracellular pH) was measured using an ion image sensor composed of a 2D (two-dimensional) array of potential sensitive pixe... In order to examine the hydronium ion (proton)-releasing functions in cells, [pH]out (extracellular pH) was measured using an ion image sensor composed of a 2D (two-dimensional) array of potential sensitive pixels. Using gastric tissues prepared from the stomach, pH distribution was observed during the histamine stimulation. The 2D distribution of [pH]out in the gastric tissues showed clear differences between the mucosal sides and the serous side. Even before the histamine stimulation, the mucosal side of the gastric mucosa showed a slightly lower pH than that of serous side. In the mucosal side, [pH]out decreased after the onset of the stimulation. The ion image sensor was capable of visualizing [pH]out in the gastric tissues. The present chemical-sensing technique realized a label-free microscopic assessment of the 2D distributions of biologically interesting substances, and consequently, [pH] out imaging via chemical microscopy has a future potential in medical fields for endoscopic analysis of gastric ulcers. 展开更多
关键词 PROTON ion image sensor extracellular ph gastric acid secretion.
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金属氧化物pH传感器的研究进展
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作者 李曼曼 吕旖雯 +1 位作者 居家奇 金妍 《微纳电子技术》 CAS 北大核心 2023年第2期184-194,共11页
围绕近年来金属氧化物pH传感器的相关研究,对其传感机理进行了概述,对不同类型金属氧化物pH传感器的研究进展进行了介绍,根据二氧化钌、二氧化铱、五氧化二钽等金属氧化物的特性,分析其作为pH敏感电极的优点和不足,重点分析了4种pH传感... 围绕近年来金属氧化物pH传感器的相关研究,对其传感机理进行了概述,对不同类型金属氧化物pH传感器的研究进展进行了介绍,根据二氧化钌、二氧化铱、五氧化二钽等金属氧化物的特性,分析其作为pH敏感电极的优点和不足,重点分析了4种pH传感器(电位型、电导型、离子敏感场效应管型和外延栅极场效应管型)的制备工艺、工作原理、灵敏度和响应时间,并总结了针对不同应用最适宜的金属氧化物pH传感器类型。最后,对金属氧化物pH传感器面临的问题进行了概述,展望了其未来的发展方向。 展开更多
关键词 ph传感器 金属氧化物 ph敏感电极 离子敏感场效应管 外延栅极场效应管
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Titanium Oxide Nanorods pH Sensors:Comparison between Voltammetry and Extended Gate Field Effect Transistor Measurements
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作者 Elidia Maria Guerra Marcelo Mulato 《Materials Sciences and Applications》 2014年第7期459-466,共8页
In recent years there has increased interest in the characterization of titanium oxide nanorods for application in analytical devices. The titanium oxide nanorods (NRTiO) were obtained by hydrothermal reaction with a ... In recent years there has increased interest in the characterization of titanium oxide nanorods for application in analytical devices. The titanium oxide nanorods (NRTiO) were obtained by hydrothermal reaction with a NaOH solution heated in the autoclave at 150°C for up to 50 h. Experimental data indicate that the prepared nanorods consist of anatase and rutile phases, with a possible interlayer structure. The NRTiO was investigated as pH sensor in the pH range 2 - 12, and the extended gate field effect transistor (EGFET) configuration presented a sensitivity of 49.6 mV/pH. Voltammetric data showed a sensitivity of 47.8 mV/pH. These results indicate that the material is a promising candidate for applications as an EGFET-pH sensor and as a disposable biosensor in the future. 展开更多
关键词 Titanium Oxide Nanorods ph sensors EGFET VOLTAMMETRY
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