A theoretical and experimental study of polyaniline/GCE and DNA G-quadruplex conformation as an impedimetric biosensor for the determination of potassium ions

Salehan, P.; Ensafi, Ali A.; Mousaabadi, Kimia Zarean; Ghasemi, Jahan B.; Aghaee, Elham; Rezaei, Behzad

doi:10.1016/j.chemosphere.2021.133460

Cited by 14 publications

(9 citation statements)

References 24 publications

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Section: Resultsmentioning

confidence: 99%

“…The EIS technique can evaluate the charge-transfer resistance (R ct ) and diffusion of electrolyte ions to the electrode surface 33 . Therefore, EIS spectra were studied in the frequency range of 100 kHz to 100 mHz to further To investigate the practical application of H-CoNiSe 2 /NC, the corresponding asymmetric supercapacitor (ASC) is assembled by using H-CoNiSe 2 /NC as the positive electrode, AC as the negative electrode, and potassium hydroxide as the electrolyte (defined as H-CoNiSe 2 /NC//AC).…”

Section: Resultsmentioning

confidence: 99%

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H-CoNiSe2/NC dodecahedral hollow structures for high-performance supercapacitors

Salehan

Ensafi

Andikaey

et al. 2023

Sci Rep

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The synergistic effect between metal ions and increasing the surface area leads to the fabrication of supercapacitor materials with high capacities. It is predicted that transition metal selenide compounds will be ideal electrode materials for supercapacitors. However, the defects of poor conductivity and volume expansion of the compounds are fundamental problems that must be solved. In this work, we successfully synthesized the cobalt–nickel selenide nitrogen-doped carbon (H-CoNiSe2/NC) hollow polyhedral composite structure using ZIF-67 as a precursor. The CoSe2 and NiSe2 nanoparticles embedded in the NC polyhedral framework offer a wealth of active sites for the whole electrode. Moreover, the presence of the NC structure in the proposed composite can simultaneously lead to improved conductivity and reduce the volume effect created during the cycling procedure. The H-CoNiSe2/NC electrode provides high specific capacity (1131 C/g at 1.0 A/g) and outstanding cyclic stability (90.2% retention after 6000 cycles). In addition, the H-CoNiSe2/NC//AC hybrid supercapacitor delivers ultrahigh energy density and power density (81.9 Wh/kg at 900 W/kg) and excellent cyclic stability (92.1% of the initial capacitance after 6000 cycles). This study will provide a supercapacitor electrode material with a high specific capacity for energy storage devices.Please confirm the corresponding affiliation for the 'Ali A. Ensafi' author is correctly identified.Error during converting author query response. Please check the eproofing link or feedback pdf for details

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

H-CoNiSe2/NC dodecahedral hollow structures for high-performance supercapacitors

Salehan

Ensafi

Andikaey

et al. 2023

Sci Rep

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“…The EIS technique can evaluate the charge-transfer resistance (R ct ) and diffusion of electrolyte ions to the electrode surface 25 . Therefore, EIS spectra were studied to evaluate further the transport characteristics of the samples (Fig.…”

Section: Resultsmentioning

confidence: 99%

H-CoNiSe2/NC Dodecahedral Hollow Structures for High-performance Supercapacitors

Ensafi

Salehan

Andikaey

et al. 2022

Preprint

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The synergistic effect between metal ions and increasing the surface area leads to the fabrication of supercapacitor materials with high capacity. It is predicted that transition metal selenide compounds will be ideal electrode materials for supercapacitors. However, the defects of poor conductivity and volume expansion of the compounds are fundamental problems that must be solved. In this work, we successfully synthesized the cobalt-nickel selenide nitrogen-doped carbon (H-CoNiSe2/NC) hollow polyhedral composite structure using ZIF-67 as a precursor. The CoSe2 and NiSe2 nanoparticles embedded in the NC polyhedral framework offer a wealth of active sites for the whole electrode. Moreover, the presence of the NC structure in the proposed composite can simultaneously lead to improved conductivity and reduce the volume effect created during the cycling procedure. The H-CoNiSe2/NC electrodes provide high specific capacity (1131 C/g at 1.0 A/g) and outstanding cyclic stability (91.4% retention after 3000 cycles). In addition, the H-CoNiSe2/NC//AC hybrid supercapacitors deliver ultrahigh energy density and power density (81.9 Wh/kg at 900 W/kg) and excellent cycle stability (93.5% of initial capacity after 3000 cycles). This study will provide a supercapacitor electrode material with a high specific capacity for energy storage devices.

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“… 50 In contrast, Salehan et al (2022) created an aptasensor which determined potassium levels in fluids successfully using electrochemical impedance spectroscopy. 51 There, a polyanaline coating on a glassy carbon electrode was modified with a potassium selective aptameter. The single-stranded DNA aptameter folded into a G-quadraplex configuration in the presence of potassium ions ( Fig.…”

Section: Devices and Technologiesmentioning

confidence: 99%

Point-of-care and self-testing for potassium: recent advances

Hutter

Collings²,

Kostova³

et al. 2022

Sens. Diagn.

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A theoretical and experimental study of polyaniline/GCE and DNA G-quadruplex conformation as an impedimetric biosensor for the determination of potassium ions

Cited by 14 publications

References 24 publications

H-CoNiSe2/NC dodecahedral hollow structures for high-performance supercapacitors

H-CoNiSe2/NC dodecahedral hollow structures for high-performance supercapacitors

H-CoNiSe2/NC Dodecahedral Hollow Structures for High-performance Supercapacitors

Point-of-care and self-testing for potassium: recent advances

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