Study on Cu-fullerene C<sub>70</sub> nanocomposite thin films under electronic excitations

Singhal, Rahul; Bhardwaj, Jyotsna; Vishnoi, Ritu; Sharma, Ganesh D.

doi:10.1088/2053-1591/aae440

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…This again confirms that gamma irradiation does not affect the structure of fullerene C 60 molecule, and therefore, it is preferred over high‐energy charge particle irradiation. Whereas, at high doses, fullerene molecule is also destroyed and converted into amorphous carbon 7–9,19 …”

Section: Resultsmentioning

confidence: 99%

“…Whereas, at high doses, fullerene molecule is also destroyed and converted into amorphous carbon. [7][8][9]19 3.6 | X-ray Photoelectron Spectroscopy…”

Section: Uv-visible Spectroscopymentioning

confidence: 99%

“…We have experimentally studied the origin of SPR with high and low-energy ion irradiation, 9,[17][18][19][20][21][22][23] but in the present study, we intend to analyze the effect of Gamma rays irradiation on Cu-fullerene nanocomposite thin films. In low-energy ion irradiation, elastic nuclear collisions dominate, hence resulting in some interstitial and lattice defects.…”

Section: Introductionmentioning

confidence: 99%

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Gamma irradiation induced surface plasmon resonance of Cu nanoparticles in fullerene C₆₀

Bhardwaj

Vishnoi

Salim

et al. 2022

Surface & Interface Analysis

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The present study reports the gamma irradiation-induced surface plasmon resonance (SPR) of Cu nanoparticles (Cu-NPs) that are embedded in the C 60 fullerene matrix. These films were deposited by the thermal co-evaporation technique. In this study, the fullerene C 60 and Cu C 60 nanocomposite thin films were deposited separately and irradiated using gamma rays at various doses from 250 to 1000 kGy. A broad but well-defined SPR peak is observed at approximately 618 nm after gamma irradiation at a dose of 1000 kGy as confirmed by UV-visible spectroscopy. An enhancement in the growth of Cu-NPs with an average diameter of 46.05 nm is obtained at a dose of 1000 kGy. Raman spectroscopy confirms the ordering of fullerene C 60 after gamma irradiation. However, the current-voltage measurements show that the resistivity of thin films remains approximately the same even after the highest doses of gamma irradiation. The electronic structures of these nanocomposite thin films were analyzed by X-ray photoelectron spectroscopy. The incorporation of Cu-NPs in fullerene C 60 changes the nature of the surface from hydrophilic to hydrophobic. These results are understood based on the ionizing nature of the gamma rays.

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Section: Resultsmentioning

confidence: 99%

“…Whereas, at high doses, fullerene molecule is also destroyed and converted into amorphous carbon. [7][8][9]19 3.6 | X-ray Photoelectron Spectroscopy…”

Section: Uv-visible Spectroscopymentioning

confidence: 99%