Soft Ion Sputtering of PAni Studied by XPS, AFM, TOF-SIMS, and STS

Goodwin, Christopher M.; Voras, Zachary E.; Tong, Xiao; Beebe, Thomas P.

doi:10.3390/coatings10100967

Cited by 12 publications

(5 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The deconvoluted C 1s can be fitted with five distinct peaks. The peak positioned at 284.6 eV accounts for C–C bonding, the peak located at 285.6 eV indicates C–NH 2 bonding, the peak observed at 286.6 eV corresponds to CN bonding, the peak located at 288.5 eV corresponds to CO bonding, and a small broad peak positioned at 290.9 eV corresponds to the π–π interactions between the GO sheets and PANI. – The deconvolution spectrum of N 1s can be fitted with four distinct peaks, as shown in Figure c. The peaks positioned at 399 eV correspond to the NN bond of an azo compound, 398.4 eV corresponds to benzenoid amine bonding, 402 eV corresponds to the cationic radical of nitrogen (N + ) bonding, and 401.9 eV corresponds to C–N bonding .…”

Section: Resultsmentioning

confidence: 98%

Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Baby,

Sunny,

Vigneshwaran

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Electronically conducting polymers (ECPs)/carbon nanomaterialbased polyaniline electrodes have received great interest in the field of supercapacitors due to their high specific capacitance, good electronic conductivity, good mechanical strength, good chemical and electrochemical stabilities, etc. Among the various available ECPs, they have received much importance due to their excellent electrochemical performances. Herein, we report a facile synthesis of a PANI-grafted graphene oxide (GO)-azopyridine (Azo) (PANI/GO-Azo) nanocomposite and use it as electrodes for fabricating supercapacitors. The azo units present in the nanocomposite act as a spacer between PANI and GO. The interfacial polymerization method is adopted for the synthesis of PANI/GO-Azo nanocomposites. The PANI/ GO-Azo nanocomposite electrode exhibits a gravimetric capacitance of 426 F g −1 at a current density of 0.25 A g −1 in 1 M H 2 SO 4 (aqueous) electrolyte. The electrode possesses good cycling stability of more than 5000 cycles with a Coulombic efficiency of 98.5%. An asymmetric supercapacitor fabricated with PANI/GO-Azo as the positive electrode and activated carbon as the negative electrode delivers an energy density of 12.45 W h kg −1 with a power density of 274.9 W kg −1 . This study proclaims that the PANI/GO-Azo nanocomposite electrode is highly promising for next-generation supercapacitors.

show abstract

Section: Resultsmentioning

confidence: 98%

Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Baby,

Sunny,

Vigneshwaran

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…43 The high-resolution N1s spectrum of PANI/NFGO is shown in Figure 3d, its peak intensity was much higher than the N1s peak of NFGO (Figure S6). Moreover, the peaks corresponding to −NH−, −N�, and N+ were located at 398.4, 399.6, and 400.8 eV, respectively, 44,45 which were different from the pyridine N, pyrrole N, and graphite N configurations in the N1s peak of NFGO, respectively. The presence of N doping in graphene, as well as semi-ionic C−F bonding, significantly increased the electrical conductivity of the sample (Table S1).…”

Section: Resultsmentioning

confidence: 99%

Enhanced Corrosion Resistance of Waterborne Epoxy Coatings by Polyaniline Nanorods and Nitrogen and Fluorine Dual-Doped Graphene Oxide Composites

Liu

Wang

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Polyaniline (PANI), as a conductive polymer, has been widely used in the corrosion protection of polymer coatings due to its high electrical conductivity and passivation effect. However, the agglomeration tendency and the difficulty of dispersion in the polymer hinder the anti-corrosion properties of PANI fillers. Therefore, in this paper, PANI nanorods were in situ polymerized on the surface of nitrogen and fluorine dual-doped graphene oxide (NFGO) layers to prepare PANI/NFGO composites and used to improve the anti-corrosion performance of waterborne epoxy coatings. The doped N elements and CF conformation with semi-ionic C−F bonds in NFGO enhanced the electrical conductivity and modified the graphene electric cloud distribution to form a fast conductive pathway in the graphene layer. In addition, the oxygen-containing groups in NFGO provided a site for the polymerization of PANI nanorods and enhance their hydrophilicity and dispersibility. Besides the capability of filling the micro-pores in the coating, the large specific surface area, the high electrical conductivity of NFGO, and the compact junction with PANI enable the electron transfer in a larger area, which increases the area of the inhibitor layer and ultimately enhanced the anticorrosion performance. The corrosion resistance performance was investigated via electrochemical impedance spectroscopy (EIS) and salt spray tests. PANI/NFGO/WEP showed the highest corrosion resistance in EIS with the R ct value of 1.213 × 10 10 Ω cm 2 , which was more than one order of magnitude higher than WEP. The excellent anti-corrosion properties were due to the synergistic effect of the physical properties of NFGO and the passivation effect of PANI nanorods.

show abstract

“…23 Figure 6c displays the O 1 s spectrum, that deconvoluted into three peaks at 400.12 eV, 401.33 eV and 398.98 eV are ascribed to C-N=C, oxidized nitrogen and C-NH=C bonds. 24 The deconvoluted nitrogen shows the two board peaks at 399.48 eV and 400.76 eV which is corresponding to N atoms hybridized with carbon in the forms of pyridinic (N1) and pyrrolic (N2). 25 From this, the N-doped graphene has been correlated with Raman spectra and revealed that the nitrogen doping on graphene nanostructure would have the ability to enhance the electrocatalytic activity towards interaction with guanine and adenine.…”

Section: Resultsmentioning

confidence: 99%

N-Graphene Paper Electrodes as Sustainable Electrochemical DNA Sensor

Jagannathan

Durgalakshmi

Rakkesh

2023

J. Electrochem. Soc.

View full text Add to dashboard Cite

The heteroatom-doped graphene structure provides an effective platform for electrochemical sensing of deoxyribonucleic acid (DNA). We have doped heteroatoms such as nitrogen (N), phosphorus (P), and sulphur (S) to the graphene sheets obtained from biomass. The obtained heteroatom-doped graphene was used to prepare electrodes on paper substrate and utilized for electrochemical sensing of calf thymus DNA. The electrochemical sensing response of the electrodes is confirmed from the oxidative peak (0.6 to 0.8 V) related to guanine (G) sensing for all electrodes. In addition, N-doped graphene electrode shows effective electrocatalytic oxidation of adenine (A), with high sensing towards guanine and adenine compared to that of other heteroatoms doped printed electrodes. The calculated limit of detection for N-doped graphene electrode is 227 ng/mL and 322 ng/mL with the sensitivity of 1.35 and 1.33 μA ng-1 cm-2 for guanine and adenine sensing, respectively. The fabricated N-doped graphene electrode have open-up a new pathway to develop an economically and environmentally friendly electrodes for DNA sensing.

show abstract

Soft Ion Sputtering of PAni Studied by XPS, AFM, TOF-SIMS, and STS

Cited by 12 publications

References 43 publications

Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Enhanced Corrosion Resistance of Waterborne Epoxy Coatings by Polyaniline Nanorods and Nitrogen and Fluorine Dual-Doped Graphene Oxide Composites

N-Graphene Paper Electrodes as Sustainable Electrochemical DNA Sensor

Contact Info

Product

Resources

About