High stability resistive switching mechanism of a screen-printed electrode based on BOBZBT2 organic pentamer for creatinine detection

AbstractThe resistive switching (RS) mechanism is resulted from the formation and dissolution of a conductive filament due to the electrochemical redox-reactions and can be identified with a pinched hysteresis loop on the I–V characteristic curve. In this work, the RS behaviour was demonstrated using a screen-printed electrode (SPE) and was utilized for creatinine sensing application. The working electrode (WE) of the SPE has been modified with a novel small organic molecule, 1,4-bis[2-(5-thiophene-2-yl)-1-benzothiopene]-2,5-dioctyloxybenzene (BOBzBT2). Its stability at room temperature and the presence of thiophene monomers were exploited to facilitate the cation transport and thus, affecting the high resistive state (HRS) and low resistive state (LRS) of the electrochemical cell. The sensor works based on the interference imposed by the interaction between the creatinine molecule and the radical cation of BOBzBT2 to the conductive filament during the Cyclic Voltammetry (CV) measurement. Different concentrations of BOBzBT2 dilution were evaluated using various concentrations of non-clinical creatinine samples to identify the optimised setup of the sensor. Enhanced sensitivity of the sensor was observed at a high concentration of BOBzBT2 over creatinine concentration between 0.4 and 1.6 mg dL−1—corresponding to the normal range of a healthy individual.

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Electrochemical sensing of Sudan I using the modified graphite screen-printed electrode

International Journal of Environmental & Analytical Chemistry ◽

10.1080/03067319.2020.1738418 ◽

2020 ◽

pp. 1-14

Author(s):

Somayeh Tajik ◽

Hadi Beitollahi ◽

Fariba Garkani Nejad ◽

Mohadeseh Safaei ◽

Peyman Mohammadzadeh Jahani

Keyword(s):

Electrochemical Sensing ◽

Screen Printed Electrode ◽

Sudan I ◽

Screen Printed

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Multi-level characteristics of TiOx transparent non-volatile resistive switching device by embedding SiO2 nanoparticles

Scientific Reports ◽

10.1038/s41598-021-89315-z ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Sera Kwon ◽

Min-Jung Kim ◽

Kwun-Bum Chung

Keyword(s):

Resistive Switching ◽

High Performance ◽

Sio2 Nanoparticles ◽

Visible Range ◽

Resistive State ◽

Switching Device ◽

Structural Density ◽

Multi Level ◽

Switching Characteristics ◽

Switching Devices

AbstractTiOx-based resistive switching devices have recently attracted attention as a promising candidate for next-generation non-volatile memory devices. A number of studies have attempted to increase the structural density of resistive switching devices. The fabrication of a multi-level switching device is a feasible method for increasing the density of the memory cell. Herein, we attempt to obtain a non-volatile multi-level switching memory device that is highly transparent by embedding SiO2 nanoparticles (NPs) into the TiOx matrix (TiOx@SiO2 NPs). The fully transparent resistive switching device is fabricated with an ITO/TiOx@SiO2 NPs/ITO structure on glass substrate, and it shows transmittance over 95% in the visible range. The TiOx@SiO2 NPs device shows outstanding switching characteristics, such as a high on/off ratio, long retention time, good endurance, and distinguishable multi-level switching. To understand multi-level switching characteristics by adjusting the set voltages, we analyze the switching mechanism in each resistive state. This method represents a promising approach for high-performance non-volatile multi-level memory applications.

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Voltammetric measurement of entacapone in the presence of other medicines against Parkinson’s disease by a screen-printed electrode modified with sulfur-tin oxide nanoparticles

Microchimica Acta ◽

10.1007/s00604-021-04733-0 ◽

2021 ◽

Vol 188 (3) ◽

Author(s):

Ebrahim Naghian ◽

Faezeh Shahdost-fard ◽

Mostafa Najafi ◽

Mohammad Reza Manafi ◽

Leila Torkian ◽

...

Keyword(s):

Parkinson’S Disease ◽

Parkinson's Disease ◽

Tin Oxide ◽

Oxide Nanoparticles ◽

Screen Printed Electrode ◽

Voltammetric Measurement ◽

Tin Oxide Nanoparticles ◽

Screen Printed

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Modified screen-printed electrode using graphene ink for electrochemical sensor application

Journal of Physics Conference Series ◽

10.1088/1742-6596/1912/1/012022 ◽

2021 ◽

Vol 1912 (1) ◽

pp. 012022

Author(s):

I Anshori ◽

S Harimurti ◽

L N Rizalputri ◽

M S Hartono ◽

R R Althof ◽

...

Keyword(s):

Electrochemical Sensor ◽

Screen Printed Electrode ◽

Sensor Application ◽

Screen Printed

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The significance of metalloproteinase 3 (MMP-3), chemokine CXC ligand 13 (CXCL-13) and complement component C5a in different stages of ANCA associated vasculitis

Scientific Reports ◽

10.1038/s41598-021-84662-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Aleksandra Rymarz ◽

Magdalena Mosakowska ◽

Stanisław Niemczyk

Keyword(s):

Characteristic Curve ◽

Active Phase ◽

Complement Component ◽

Active Group ◽

Control Group ◽

Creatinine Concentration ◽

Anca Associated Vasculitis ◽

Good Ability ◽

Potential Marker

AbstractThe aim of the study was to evaluate the significance of metalloproteinase 3 (MMP-3), chemokine CXC ligand 13 (CXCL-13) and complement component 5a (C5a) in different stages of ANCA associated vasculitis (AAV). 89 adults were included into the study. 28 patients with active AAV (Birmingham Vasculitis Activity Score, BVAS > 3) formed the Active Group. 24 individuals who were in remission after 6 months of induction therapy formed the Short R Group, while 34 patients with longitudinal remission formed the Long R Group. 28 patients without autoimmune diseases similar in terms of age, gender and stage of kidney disease formed the Control Group. Receiver operating characteristic curve analysis (ROC) was used to evaluate MMP-3, CXCL-13 and C5a as markers of the different phases of vasculitis. In ROC analysis, MMP-3, CXCL-13 and C5a presented a good ability in distinguishing active vasculitis (Active Group) from the Control Group (AUC > 0.8), whereas only CXCL-13 displayed potential ability in distinguishing active vasculitis (Active Group) from long term remission (Long R Group, AUC = 0.683). MMP-3 significantly and positively correlated with serum creatinine concentration (r = 0.51, p = 0.011; r = 0.44, p = 0.009; r = −0.66, p < 0.001) and negatively with eGFR (r = −0.5, p = 0.012; r = −0.35, p = 0.039; r = −0.63, p < 0.001) in the Short R, Long R and Control Groups. MMP-3, CXCL-13, C5a can be potential markers in differentiating an active phase of vasculitis from other pathologies. However they can be treated as complementary to the well-known markers. CXCL-13 seems to be a potential marker in distinguishing active vasculitis from long term remission. MMP-3 level can be related to kidney function expressed by eGFR, therefore its elevation should be interpreted with caution in patients with kidney failure.

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