Synthesis and electrical properties of graphene–manganese oxide hybrid nanostructures

Ahmed, Abdel Ghaffar M.; Duraia, El‐Shazly M.; Fouda, A. N.

doi:10.1007/s10854-021-07676-7

Cited by 6 publications

(2 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For graphite, the observed peak at 2730 cm −1 of graphite is assigned to 2D band which is due to double resonance in the corner of Brillouin zone. D-band is related to defects of the created edges that responsible for momentum conservation in the double resonance Raman spectroscopy, and G band is attributed to the vibration of the hexagonal two-dimensional planes in carbon atoms [34]. The characteristics D and G peaks were observed at 1340 cm −1 and 1565 cm −1 , respectively.…”

Section: Raman Spectramentioning

confidence: 97%

“…For MWCNTs, the lower frequency region which extended from (60 Hz < f < 80 Hz) is shorter than the lower frequency region (60 Hz < f < 350 Hz) of O-CNTs. At lower frequencies, the trend of descending capacitance with increasing frequency is assigned to the response of the generated electric dipoles to frequency dispersion in the double layer space charge polarization (charging/ discharging) process and the amount of travelled charges at higher frequencies [34]. However, the remarkable lag of drop for O-CNTs with respect to MWCNTs may be attributed to the enhancement in surface area.…”

Section: Dielectric Characteristicsmentioning

confidence: 98%

See 1 more Smart Citation

Synthesized partially unzipped carbon nanotubes and potential DNA/CNTs interactions

Fouda

Almaqwashi

2023

Phys. Scr.

Self Cite

View full text Add to dashboard Cite

Carbon nanotubes (CNTs) are structurally considered to be graphene nano-ribbons (GNRs) that rolled up into seamless tubes. While CNTs nanotechnology is advancing, synthesis of GNRs from CNTs is sought after for precise and integrative graphene applications. Acid treatment of CNTs can generate longitudinal unzipping in an effective, large scale and economic approach. However, further understanding of CNTs-to-GNRs degradation, which mimics biodegradation molecular processes by oxidants, can also aid to assess toxicological impact of biodegraded CNTs. In this study, unzipping of multi-wall carbon nanotubes (MWCNTs) was established using a strong oxidizing agent. The influence of oxidation on the morphological, crystalline quality and dielectric properties was investigated. In particular, partial unzipping of CNTs was confirmed by transmission electron microscopy (TEM), and scanning electron microscopy (SEM) images. Broad band dielectric spectroscopy (BDS) was utilized to depict the influence of the applied frequency on the dielectric properties. GNRs exhibited a lag in the drop of capacitance and impedance to higher values of frequency with respect to the starting MWCNTs. Furthermore, DNA interactions with partially unzipped carbon nanotubes, were computationally assessed by employing molecular docking. The obtained potential DNA-CNT molecular confirmations were illustrated and their biomolecular implications were discussed.

show abstract

Section: Raman Spectramentioning

confidence: 97%

Section: Dielectric Characteristicsmentioning

confidence: 98%