Effects of green laser fluence on the characteristics of graphene nanosheets synthesized by laser ablation method in liquid nitrogen medium

Vaghri, Elnaz; Dorranian, Davoud

doi:10.1007/s11082-018-1374-7

Cited by 6 publications

(7 citation statements)

References 28 publications

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“…It was concluded that the best quality was achieved when using 532 nm laser beam; however, the sheets were of multilayer thickness. This was also confirmed by other work by the same group [ 56 ]. Bilayer graphene nanosheets were achieved when increasing the wavelength to 1064 nm, but this was at the expense of the quality of the produced nanosheets.…”

Section: Graphene Nanostructures Prepared By Plalsupporting

confidence: 91%

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Graphene Nanostructures by Pulsed Laser Ablation in Liquids: A Review

Al-Tuwirqi

2022

Materials

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High-quality graphene has demonstrated remarkable mechanical, thermal, electronic, and optical properties. These features have paved the road for the introduction of graphene into numerous applications such as optoelectronics and energy devices, photodegradation, bioimaging, photodetectors, sensors, and biosensors. Due to this, graphene research has accelerated exponentially, with the aim of reaching a sustainable large-scale production process of high-quality graphene that can produce graphene-based technologies at an industrial scale. There exist numerous routes for graphene fabrication; however, pulsed laser ablation in liquids (PLAL) has emerged as a simple, fast, green, and environmentally friendly method as it does not require the use of toxic chemicals. Moreover, it does not involve the use of expensive vacuum chambers or clean rooms. However, the great advantage of PLAL is its ability to control the size, shape, and structure of the produced nanostructures through the choice of laser parameters and liquid used. Consequently, this review will focus on recent research on the synthesis of graphene nanosheets and graphene quantum dots via PLAL and the effect of experimental parameters such as laser wavelength, pulse width, pulse energy, repetition rate, irradiation time, and liquid media on the produced nanostructures. Moreover, it will discuss extended PLAL techniques which incorporate other methods into PLAL. Finally, different applications that utilize nanostructures produced by PLAL will be highlighted. We hope that this review will provide a useful guide for researchers to further develop the PLAL technique and the fabrication of graphene-based materials.

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Section: Graphene Nanostructures Prepared By Plalsupporting

confidence: 91%

“…Due to this, the graphite layers can be easily separated when sufficient energy is provided. The laser energy in the PLAL process can provide such energy to break the weak Van der Waals bonds between the graphite planes to produced graphene nanosheets [ 24 , 56 ].…”

Section: Fundamentals Of Plalmentioning

confidence: 99%

Graphene Nanostructures by Pulsed Laser Ablation in Liquids: A Review

Al-Tuwirqi

2022

Materials

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“…Furthermore, there is a broad and vigorous characteristic band around ~715 cm -1 . Furthermore, there is a broad and vigorous distinctive band around 715 cm -1 [26]; this is analogous to the aromatic plane folding of C-H that occurs in water between carbon and hydrogen atoms, and a weak band of C-OH stretching vibration group has appeared at ~1346 cm -1 . Finally, a small peak of C-O stretching mode was shown at ~1174 cm -1 [27].…”

Section: Resultsmentioning

confidence: 93%

Eco‐Friendly Synthesis of Carbon Nanoparticles by Laser Ablation in Water and Evaluation of Their Antibacterial Activity

AlMalki

Khashan

Jabir

et al. 2022

Journal of Nanomaterials

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Carbon nanomaterials are ground-breaking two-dimensional materials with a wide range of applications because of their unique properties, which include excellent optical, electrical, thermal, and mechanical capabilities; biocompatibility; and inexpensive large-scale production costs. In this study, carbon nanostructural materials (CNMs) were effectively generated using a pulsed laser ablation method on a graphite target immersed in deionized water, and their cytotoxicity and antibacterial activities were evaluated. Lasing pulse duration, ns (1064 nm) with different laser energies (60-220 mJ), was employed for irradiating the target. The formation of CNMs was analyzed using Fourier transform infrared spectroscopy, which demonstrated that C–H, C–C, C–O, and C=C bonds were successfully formed. TEM micrographs observed CNM formation with a spherical shape and size ranging from 20 to 90 nm. The absorbance was measured using UV-Vis spectroscopy; it increased with increasing laser energy showing two broad shoulders around 210 and 305 nm. Thereafter, the antibacterial activity was tested against Escherichia coli and Staphylococcus aureus using the agar method. The results indicated that CNMs fabricated at laser energy 220 mJ have the highest activity against both strains and have presented inhibition zone (IZ) of about 34 ± 1.0 mm in S. aureus and 31 ± 1.5 mm for E. coli. A comparison with CNMs prepared at 160 mJ showed an IZ of 14 mm for S. aureus and of 12 mm for E. coli due to synergistic impact, while the cellular material release analysis displayed increased release with respect to the time of exposure due to inhibition of bacterial growth.

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“…The relationship between the D and G bands (I D /I G ratio) was calculated to compare the effect of the second laser treatment on structural defects in the carbon matrix. The I D /I G ratio values for the LS-ePAD and LSAu-ePAD were 1.4 and 2.0, respectively, indicating that the second laser irradiation introduces more structural defects on the carbon surface [15,35].…”

Section: Morphological Characterizationmentioning

confidence: 97%