Laser-induced local profile transformation of multilayered graphene on a substrate

Фролов, В. М.; Pivovarov, P. A.; Zavedeev, E. V.; Khomich, А.А.; Григоренко, А. Н.; Konov, V. I.

doi:10.1016/j.optlastec.2014.12.016

Cited by 17 publications

(6 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If multiple pulsed laser fluence E was much lower than sin gle pulse ablation threshold for graphene E a = 0.25 J cm −2 [11] and below experimentally measured threshold of mechanical destruction (fracture) in multiple pulsed regime E m ≈ 0.08-0.085 J cm −2 , for sufficiently larger pulse number N ⩾ 10 5 we observed local graphene profile transformation, similar to what was observed earlier in [13,14]. As a rule, nanopits with depth up to 2 nm and lateral size close to but higher than beam focal spot diameter were formed.…”

Section: Resultssupporting

confidence: 89%

“…Earlier we found [13] that multiplepulsed laser action by short (nanosecond) laser pulses can induce local gra phene profile transformation. In the case of low beam inten sity (below ablation and destruction threshold) and multiple pulsed irradiation nanopits with diameter slightly above irra diation spot size and depth about 1 nm were formed in gra phene sheets that were produced by defoliation technique and then transferred on SiO 2 /Si substrates.…”

Section: Introductionmentioning

confidence: 88%

See 1 more Smart Citation

Laser induced modification of mechanical properties of nanostructures: graphene–water adsorbate–substrate

Pivovarov¹,

Фролов²,

Zavedeev³

et al. 2016

Laser Phys.

View full text Add to dashboard Cite

The possibility of laser induced modification of local mechanical properties of polycrystalline chemical vapor deposition graphene on silicon substrate in air has been demonstrated. Nanosecond laser pulses (wavelength 532 nm) with focal spot diameter ~1 μm were used. Samples were placed and irradiated inside a scanning probe microscope (SPM) that allowed in situ studies of surface morphology and mechanical phase contrast in SPM tapping mode before and after multipulsed laser treatment. It was found that along with local profile transformation of graphene sheet (formation of nanopits and nanobumps), transformation of mechanical properties of graphene on a substrate structure took place. Such laser modified graphene area is larger than (but of the order of) the irradiation spot size. Its appearance is related to laser induced radial extension of an adsorbed water nanolayer intercalated between graphene and substrate. It is shown that the process of water layer lateral migration has a reversible character. This effect is proved by laser spot shift and sequential irradiation.

show abstract

Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 88%

Laser induced modification of mechanical properties of nanostructures: graphene–water adsorbate–substrate

Pivovarov¹,

Фролов²,

Zavedeev³

et al. 2016

Laser Phys.

View full text Add to dashboard Cite

show abstract

“…In 2001, before single layer graphene was experimentally discovered, Jeschke et al [53] identified by means of molecular dynamics simulations a new ablation mechanism of thin graphite films at fluences below the threshold for the damage of graphite planes (∼170 mJ cm −2 ). The last decade much work has been done [54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69] for the optimization of fs laser patterning processes in graphene by investigating the dependence of ablation process on the fs laser exposure parameters (e.g. fluence, pulse energy, pulse duration, repetition rate, exposure time and scanning speed).…”

Section: Introductionmentioning

confidence: 99%

Graphene nano-sieves by femtosecond laser irradiation

et al. 2022

View full text Add to dashboard Cite

The formation of nano-pores in graphene crystal structure is alternative way to engineer its electronic properties, chemical reactivity, and surface interactions, enabling applications in technological fields such as sensing, energy and separation. The past few years, nano-perforation of graphene sheets has been accomplished by a variety of different methods suffering mainly from poor scalability and cost efficiency issues. In this work, we introduce an experimental protocol to engineer nanometer scale pores in CVD graphene membranes under ambient conditions, using low power ultra-short laser pulses and overcoming the drawbacks of other perforation techniques. Using AFM and SEM we visualized and quantified the nanopore network while Raman spectroscopy is utilized to correlate the nano-perforated area with the nanotopographic imaging. We suggest that Raman imaging provides the identification of nanoporous area and, in combination with AFM, we provide solid evidence for the reproducibility of the method, since under these experimental conditions, nanopores of a certain size distribution are formed.

show abstract

“…The dynamic behaviors of ion beams released from gold, silver, silicon, graphene, and stainless steel plasmas at various laser pulse durations have been reported. [24][25][26][27][28] In this work, the W ion source and high current signal under applied DPLAS geometry are generated for the first time. Farid et al [16] focused only on a single-pulse Nd:YAG laser ablation with an energy of 300 mJ at 1064 nm, 160 mJ at 532 nm, and 85 mJ at 355 nm, separately.…”

Section: Introductionmentioning

confidence: 99%

Tungsten ion source under double-pulse laser ablation system

et al. 2017

View full text Add to dashboard Cite

New tungsten ion source is produced by using single and double-pulse laser ablation system. Combined collinear Nd:YAG laser beams (266+1064 nm) are optimized to focus on the sample in air. Optimization of the experimental parameters is achieved to enhance the signal-to-noise ratio of the emission spectra. The velocity distribution of the emitted plasma cloud is carefully measured. The influences of the potential difference between the bias electrodes, laser wavelength and intensity on the current signal are also studied. The results show that the increase in the tungsten ion velocity under the double-pulse lasers causes the output current signal to increase by about three folds. The electron density and temperature are calculated by using the Stark-broadened line profile of tungsten line and Boltzmann plot method of the upper energy levels, respectively. The signal intensity dependence of the tungsten ion angular distribution is also analyzed. The results indicate that the double-pulse laser ablation configuration is more potent technique for producing more metal ion source deposition, thin film formation, and activated plasma-facing component material.

show abstract

Laser-induced local profile transformation of multilayered graphene on a substrate

Cited by 17 publications

References 23 publications

Laser induced modification of mechanical properties of nanostructures: graphene–water adsorbate–substrate

Laser induced modification of mechanical properties of nanostructures: graphene–water adsorbate–substrate

Graphene nano-sieves by femtosecond laser irradiation

Tungsten ion source under double-pulse laser ablation system

Contact Info

Product

Resources

About