Structural, optical, thermal and electrochemical properties of rGO/PEDOT:PSS/PVP composite for supercapacitor electrode application

Devi, Pukhrambam Sushma; Chanu, Sagolsem Nonganbi; Dasgupta, Prajnamita; Swain, Bhabani Sankar; Swain, Bibhu P.

doi:10.1007/s00339-022-05556-3

Cited by 18 publications

(6 citation statements)

References 41 publications

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“…In addition, the reaction process was also monitor by using FTIR. As shown in Figure 6C, the stretching vibrational absorption peaks of OH and SH at 2566 and 3376 cm −1 gradually increased with increasing reaction time, meanwhile, the characteristic absorption peak of thiol appeared at 1411 (COH) 45 and 615 cm −1 (CS), 46–48 meaning that H 2 S is successfully converted into thiols.…”

Section: Resultsmentioning

confidence: 90%

Exceptionally effective H₂S absorption and conversion into thiols in novel superbase protic ionic liquids

et al. 2022

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We demonstrate an effective strategy for capture and conversion of H 2 S in novel superbase protic ionic liquids (SPILs). It is found that the synthesized SPILs with the multiple active sites exhibit the unprecedented H 2 S uptake via chemical absorption (up to 1.81 mol mol À1 at 298.2 K and 1 bar). More importantly, H 2 S molecule is activated by these SPILs during the absorption process, so that the activated H 2 S can be converted further into high value-added thiols in situ with excellent yields under mild conditions (303.2 K and 1 bar) without any solvents and metallic catalysts. Since H 2 Ssaturated SPILs can be regenerated by chemical conversion of absorbed H 2 S into thiols, thereby eliminating the higher input of energy consumption during the process of H 2 S stripping. This SPIL-mediated scheme provides an alternative approach for the capture and chemical conversion of H 2 S.

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Section: Resultsmentioning

confidence: 90%

Exceptionally effective H₂S absorption and conversion into thiols in novel superbase protic ionic liquids

et al. 2022

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“…The MN‐PEDOT:PSS (Figure 2(i‐b)) presents PEDOT's major peak at 1460 cm −1 attributed to CC stretching of the thiophene ring, at 1268 cm −1 due to the symmetric CC stretching of the thiophene inter‐ring, at 1150 cm −1 due to the COC stretching, and at 1070 cm −1 it is assignable to the CCO stretching of the ethylenedioxy groups. [ 43–45 ] In addition, the absorptions at 953, 870, and 711 cm −1 can be attributed to the CSC of the thiophene ring backbone. [ 46 ] The PSS presents symmetric and asymmetric OSO stretches at 1380 and 1150 cm −1 , respectively, [ 47 ] wherein the peak at 1070 cm −1 can be attributed to an SO stretch due to the S‐phenyl bond of the sulfonate.…”

Section: Resultsmentioning

confidence: 99%

“…[ 46 ] The PSS presents symmetric and asymmetric OSO stretches at 1380 and 1150 cm −1 , respectively, [ 47 ] wherein the peak at 1070 cm −1 can be attributed to an SO stretch due to the S‐phenyl bond of the sulfonate. [ 43–45 ] In addition, the absorptions at 953, 870, and 711 cm −1 can be attributed to the CSC of the thiophene ring backbone. [ 46 ] The PSS presents symmetric and asymmetric OSO stretches at 1380 and 1150 cm −1 , respectively, [ 47 ] wherein the peak at 1070 cm −1 can be attributed to an SO stretch due to the S‐phenyl bond of the sulfonate.…”

Section: Resultsmentioning

confidence: 99%

“…[ 46 ] The PSS presents symmetric and asymmetric OSO stretches at 1380 and 1150 cm −1 , respectively, [ 47 ] wherein the peak at 1070 cm −1 can be attributed to an SO stretch due to the S‐phenyl bond of the sulfonate. [ 45 ] The FTIR spectrum of BADGE‐PEDOT:PSS microneedles can be observed in Figure S6 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

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Conductive Polymer‐Coated 3D Printed Microneedles: Biocompatible Platforms for Minimally Invasive Biosensing Interfaces

Keirouz

Mustafa

Turner

et al. 2023

Small

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Conductive polymeric microneedle (MN) arrays as biointerface materials show promise for the minimally invasive monitoring of analytes in biodevices and wearables. There is increasing interest in microneedles as electrodes for biosensing, but efforts have been limited to metallic substrates, which lack biological stability and are associated with high manufacturing costs and laborious fabrication methods, which create translational barriers. In this work, additive manufacturing, which provides the user with design flexibility and upscale manufacturing, is employed to fabricate acrylic‐based microneedle devices. These microneedle devices are used as platforms to produce intrinsically‐conductive, polymer‐based surfaces based on polypyrrole (PPy) and poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS). These entirely polymer‐based solid microneedle arrays act as dry conductive electrodes while omitting the requirement of a metallic seed layer. Two distinct coating methods of 3D‐printed solid microneedles, in situ polymerization and drop casting, enable conductive functionality. The microneedle arrays penetrate ex vivo porcine skin grafts without compromising conductivity or microneedle morphology and demonstrate coating durability over multiple penetration cycles. The non‐cytotoxic nature of the conductive microneedles is evaluated using human fibroblast cells. The proposed fabrication strategy offers a compelling approach to manufacturing polymer‐based conductive microneedle surfaces that can be further exploited as platforms for biosensing.

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“…Diii shows the high-resolution XPS analysis of the N 1s spectrum with a characteristic peak at 399.8 eV, which corresponds to the graphitic-N signal, and Figure. Div shows O 1s peaks at 535.2 and 532 eV corresponding to the peaks of O–O and O–N–C …”

Section: Resultsmentioning

confidence: 99%

Electrochemical Strip Sensor Based on a Graphene-Au-PEDOT Nanocomposite for Detection and Continuous Monitoring of Dacarbazine

P K,

Kafley,

A Sukumaran

et al. 2023

ACS Appl. Nano Mater.

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We are aiming to develop an electrochemical strip sensor for the detection and continuous monitoring of dacarbazine (DTIC), which is a chemotherapeutic drug used to treat various cancers. This new type of drug sensing meets the increasing need for personalized medicine, which aims to improve treatment outcomes while reducing side effects and controlling pollution from pharmaceutical and industrial production. The DTIC strip sensor was fabricated by modifying a screen-printed carbon electrode (SPCE) with graphene-gold nanocomposites embedded with a poly(3,4-ethylene dioxythiophene) (PEDOT) conducting polymer. The nanocomposites were characterized using advanced analytical instruments such as X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The modified sensor showed significant enhancement in the electrochemical oxidation signals of DTIC due to facilitated electron transfer at the interface between the analyte DTIC and SPCE/AuNPs-PEDOT/rGO with Ag/AgCl as the reference electrode and carbon as the working and counter electrode. The interfacial studies of the DTIC sensor were carried out by cyclic voltammetry and electrochemical impedance spectroscopy. Further, its electroanalytical performance was tested using square-wave voltammetry with a wide range of 2.5−1450 nM (working potential range of 1 to −1.5 V vs the Ag/AgCl reference electrode) and chronoamperometry with a wide linear range of 2.5−1675 nM (at a constant potential of 0.65 V). The sensor's practical potency was confirmed in human serum with a dynamic linear range of 2.5−1500 nM with an LOD of 0.09 nM. The sensor exhibited high sensitivity, selectivity, reproducibility, and long-term storage stability. The simple sensor design and its attractive analytical performance suggest considerable promise for its use in the onsite screening of anticancer drugs, including in human serum and industrial wastewater.

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Structural, optical, thermal and electrochemical properties of rGO/PEDOT:PSS/PVP composite for supercapacitor electrode application

Cited by 18 publications

References 41 publications

Exceptionally effective H₂S absorption and conversion into thiols in novel superbase protic ionic liquids

Exceptionally effective H₂S absorption and conversion into thiols in novel superbase protic ionic liquids

Conductive Polymer‐Coated 3D Printed Microneedles: Biocompatible Platforms for Minimally Invasive Biosensing Interfaces

Electrochemical Strip Sensor Based on a Graphene-Au-PEDOT Nanocomposite for Detection and Continuous Monitoring of Dacarbazine

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Structural, optical, thermal and electrochemical properties of rGO/PEDOT:PSS/PVP composite for supercapacitor electrode application

Cited by 18 publications

References 41 publications

Exceptionally effective H2S absorption and conversion into thiols in novel superbase protic ionic liquids

Exceptionally effective H2S absorption and conversion into thiols in novel superbase protic ionic liquids

Conductive Polymer‐Coated 3D Printed Microneedles: Biocompatible Platforms for Minimally Invasive Biosensing Interfaces

Electrochemical Strip Sensor Based on a Graphene-Au-PEDOT Nanocomposite for Detection and Continuous Monitoring of Dacarbazine

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Exceptionally effective H₂S absorption and conversion into thiols in novel superbase protic ionic liquids

Exceptionally effective H₂S absorption and conversion into thiols in novel superbase protic ionic liquids