scholarly journals A Solid-State Thin-Film Ag/AgCl Reference Electrode Coated with Graphene Oxide and Its Use in a pH Sensor

Sensors ◽  
2015 ◽  
Vol 15 (3) ◽  
pp. 6469-6482 ◽  
Author(s):  
Tae Kim ◽  
Sung Hong ◽  
Sung Yang
Keyword(s):  
Thin Film ◽  
Graphene Oxide ◽  
Solid State ◽  
Ph Sensor ◽  
Reference Electrode

scholarly journals Titanium Nitride Thin Film Based Low-Redox-Interference Potentiometric pH Sensing Electrodes

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 42
Author(s):  
Shimrith Paul Shylendra ◽  
Wade Lonsdale ◽  
Magdalena Wajrak ◽  
Mohammad Nur-E-Alam ◽  
Kamal Alameh
Keyword(s):  
Thin Film ◽  
Titanium Nitride ◽  
Orange Juice ◽  
Ph Sensor ◽  
Reference Electrode ◽  
Cost Effective ◽  
Ph Sensing ◽  
Ph Sensors ◽  
Potential Shift ◽  
Double Junction

In this work, a solid-state potentiometric pH sensor is designed by incorporating a thin film of Radio Frequency Magnetron Sputtered (RFMS) Titanium Nitride (TiN) working electrode and a commercial Ag|AgCl|KCl double junction reference electrode. The sensor shows a linear pH slope of −59.1 mV/pH, R2 = 0.9997, a hysteresis as low as 1.2 mV, and drift below 3.9 mV/h. In addition, the redox interference performance of TiN electrodes is compared with that of Iridium Oxide (IrO2) counterparts. Experimental results show −32 mV potential shift (E0 value) in 1 mM ascorbic acid (reducing agent) for TiN electrodes, and this is significantly lower than the −114 mV potential shift of IrO2 electrodes with sub-Nernstian sensitivity. These results are most encouraging and pave the way towards the development of miniaturized, cost-effective, and robust pH sensors for difficult matrices, such as wine and fresh orange juice.

All-Solid-State pH Sensor Based on Conducting Polymer

2010 ◽  
Vol 93-94 ◽  
pp. 591-594 ◽  
Author(s):  
W. Natedungta ◽  
W. Prissanaroon-Ouajai
Keyword(s):  
Solid State ◽  
Conducting Polymer ◽  
Electrolyte Solution ◽  
Ph Sensor ◽  
Reference Electrode ◽  
Ph Measurement ◽  
Metallic Silver ◽  
Internal Solution ◽  
State Reference ◽  
Ph Electrode

A solid-state (free of internal electrolyte solution) reference electrode based on metallic silver is simply fabricated via a simple electrodeposition from AgNO3. Potentiometry is carried out to study the performance of the solid-state reference electrode in comparison with the commercial Ag/AgCl reference electrode. In addition, the proposed solid-state reference electrode has been integrated with the PPy-modified pH electrode to form an all-solid-state pH sensor, showing the capability of pH measurement. Absence of the internal solution leads to the pH sensor that is convenient to use and maintenance. In addition, the proposed pH sensor is possibly applied to biochemical and medical processes as well as flow infection analysis.

Preparation and performance of a solid-state thin-film Ag/AgCl quasi-reference electrode modified by chitosan-graphene

2020 ◽  
Vol 36 (2) ◽  
pp. 63-71
Author(s):  
Kun Xu ◽  
Yujie Xin ◽  
Xiliang Zhang ◽  
Yunqing Tang ◽  
Caizhang Wu
Keyword(s):  
Thin Film ◽  
Solid State ◽  
Reference Electrode ◽  
And Performance

scholarly journals Application of Silver Conducting Glasses to Solid State Batteries and Sensors

1990 ◽  
Vol 14 (2) ◽  
pp. 81-94 ◽  
Author(s):  
Liu Jun ◽  
J. Portier ◽  
B. Tanguy ◽  
J. J. Videau ◽  
M. Ait Allal ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Solid State ◽  
Reference Electrode ◽  
Silver Ion ◽  
Ionic Conducting ◽  
Solid State Batteries ◽  
Electrochemical Devices ◽  
Ion Conducting ◽  
Mis Structures

Fast silver ion conducting glasses as electrochemical devices have been tested. A silver iodine battery using a silver ionic conducting glass (AgPO3-Ag2S-AgI) has been studied. The interaction of some gases (O2CI2, H2S) with the electrochemical chains: Pt/Sb2S3-AgI (glass)/Ag and Pt/AgCl (thin film)/Sb2S3- AgI (glass)/Ag has been investigated. Finally, the behavior of thin films of Ag2S3-Ag2S-CdS glasses as sensitive membranes for Cd detection in solution has been tested on MIS structures Au/Si/SiO2/ Membrane/Cd in solution/Reference electrode.

Palladium nanoparticles/wool keratin-assisted carbon composite-modified flexible and disposable electrochemical solid-state pH sensor

2021 ◽  
Author(s):  
Wenli Zhang ◽  
Xiaotian Liu ◽  
Youhui Lin ◽  
Liyun Ma ◽  
Linqin Kong ◽  
...  
Keyword(s):  
Composite Material ◽  
Solid State ◽  
Palladium Nanoparticles ◽  
Ph Sensor ◽  
Reference Electrode ◽  
Carbon Composite ◽  
Body Fluids ◽  
Processes And Reactions ◽  
Relative Standard ◽  
Wool Keratin

Abstract Several pH-dependent processes and reactions take place in the human body; hence, the pH of body fluids is the best indicator of disturbed health conditions. However, accurate and real-time diagnosis of the pH of body fluids is complicated because of limited commercially available pH sensors. Hence, we aimed to prepare a flexible, transparent, disposable, user-friendly, and economic strip-based solid-state pH sensor using palladium nanoparticles (PdNPs)/N-doped carbon (NC) composite material. The PdNPs/NC composite material was synthesized using wool keratin (WK) as a precursor. The in-situ prepared PdNPs played a key role in the controlled switching of protein structure to the N-doped carbon skeleton with π-π arrangement at the mesoscale level, which mimics the A-B type polymeric structure, and hence, highly susceptible to H+ ions. The optimized carbonization condition in the presence of PdNPs showed that the material obtained using a modified Ag/AgCl reference electrode had the highest pH sensitivity with excellent stability and durability. The optimized pH sensor showed high specificity and selectivity with a sensitivity of 55 mV/pH unit and a relative standard deviation of 0.79%. This study is the first to synthesize PdNPs 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.

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