Abstract
Au nanoparticles are synthesized in a fullerene C60 matrix using the thermal co-evaporation technique. Fullerene C60 is chosen due to its high dielectric constant which gives a large tuning of SPR wavelength of Au nanoparticles in the visible region. A beam of 120 keV Ar ion is used to tune the SPR wavelength of Au nanoparticles in both the regions, lower wavelength (blue shift) and higher wavelength (red shift). The shift in SPR wavelength is found to be dependent on the dose of the beam. A ~ 161 nm red shift in SPR wavelength is obtained at a dose of 1 × 1015 ions/cm2, and then a blue shift of ~ 221 nm is obtained at a dose of 3 × 1016 ions/cm2. Growth in the size of Au nanoparticles is obtained with ion irradiation as confirmed by transmission electron microscopy on Au–C60 nanocomposite thin film which is responsible for the red shift in SPR wavelength. Raman spectroscopic study confirms the transformation of fullerene C60 matrix into amorphous carbon at higher doses, which gives a blue shift to SPR wavelength. The surface morphology of the Au–C60 nanocomposite film before and after irradiation was studied using FESEM and AFM. A growth of surface grains is achieved with an increasing dose. The chemical state of the Au and Carbon in nanocomposite film before and after the ion irradiation is studied by X-ray photoelectron spectroscopy.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors are thankful to the Materials Research Centre, MNIT, Jaipur, for providing characterization facilities. One of the authors (Dr. Ritu Vishnoi) acknowledges the financial support by DST New Delhi in terms of the Woman Scientist Project (SR/WOS-A/PM-47/2019) Dr. Rahul Singhal is thankful to CSIR New Delhi (Ref: 03(1408)/17/EMR-II) and DST New Delhi (EMR/2016/005208) for their financial support to carry out the experimental research work. The support provided by IUAC New Delhi in terms of the UFP Project (Ref No. 1000111996) and student fellowship is also highly acknowledged. The financial support by UGC-DAE-CSR Indore Centre (Ref No. CRS-294/2019-20/1346) is also gratefully acknowledged. The author is also thankful to DST New Delhi for providing a grant under DST-SERI (D07) scheme.
Funding
This work was supported by authors: (a) Amena Salim( UFP Project (Ref No. 1000111996)), (b) Dr. Ritu Vishnoi (SR/WOS-A/PM-47/2019), (c) Dr. Rahul Singhal (Ref: 03(1408)/17/EMR-II), and (Ref No. CRS-294/2019–20/1346). Author (a) Amena Salim ( UFP Project (Ref No. 1000111996)) has received research support from IUAC New Delhi. Author (b) Dr. Ritu Vishnoi (SR/WOS-A/PM-47/2019) has received support from DST New Delhi in terms of the Woman Scientist Project. Author (c) Dr. Rahul Singhal (Ref: 03(1408)/17/EMR-II), (EMR/2016/005208) and (Ref No. CRS-294/2019–20/1346) has received research support from CSIR New Delhi, DST New Delhi and UGC-DAE-CSR Indore Centre respectively.
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All authors contributed to the study conception and design. Material preparation performed by AS, RV data collection by HD, VC, JB, and Formal analysis was performed by DG, SA, UKD, PK, SB, GDS and supervision by RS. The first draft of the manuscript was written by AS and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Salim, A., Vishnoi, R., Dixit, H. et al. 120 keV Ar ion-induced red and blue shift of SPR Wavelength of Au nanoparticles in fullerene C60. J Mater Sci: Mater Electron 33, 15533–15545 (2022). https://doi.org/10.1007/s10854-022-08459-4
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DOI: https://doi.org/10.1007/s10854-022-08459-4