Reduction of graphite oxide to graphene with laser irradiation

Trusovas, Romualdas; Ratautas, Karolis; Račiukaitis, Gediminas; Barkauskas, Jurgis; Stankevičienė, Inga; Niaura, Gediminas; Mažeikienė, Regina

doi:10.1016/j.carbon.2012.10.017

Cited by 168 publications

(120 citation statements)

References 40 publications

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“…Such a behaviour is not unexpected and well reported in the literature for the laser photolysis of pure GO dispersions. 28,29 It should be noted, that we do not question the overall photochemical reduction of graphene in ref. 1, such as shown impressively via XPS, but just the molecular mechanism.…”

Section: Discussionmentioning

confidence: 99%

How fast is the reaction of hydrated electrons with graphene oxide in aqueous dispersions?

et al. 2015

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Section: Discussionmentioning

confidence: 99%

How fast is the reaction of hydrated electrons with graphene oxide in aqueous dispersions?

et al. 2015

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“…Figure 1 represents the room temperature unpolarized Raman spectroscopy data of RGO thin films deposited onto SiO2 (300 nm)/ Si. Raman spectra of graphene-based materials show almost all the significant features in the range between 1000 cm -1 to 3000 cm -1 , and the corresponding Raman modes are known as D, G, 2D and D+G band [15]. To ensure the best fit an extra peak was found in between D and G band which is known as f band [16].…”

Section: /Spmentioning

confidence: 99%

Reduced Graphene Oxide Thin Films with Very Large Charge Carrier Mobility Using Pulsed Laser Deposition

Bhaumik¹,

Haque²,

Taufique³

et al. 2017

J Material Sci Eng

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Large area reduced graphene oxide (RGO) thin films have been grown using pulsed laser deposition (PLD) technique. A very large carrier mobility of 372 cm 2 V -1 s -1 has been observed in a PLD grown RGO thin film with a large sp 2 carbon fraction of 87% along with narrow Raman 2D peak profile. The fraction of sp 2 carbon and carbon/oxygen ratios are tuned through PLD growth parameters, and these are estimated from X-ray photoelectron spectroscopy (XPS) data. The electrical properties of the RGO thin films are comprehended by the intensity ratios between different optical phonon vibrational modes of Raman Spectra. The photoluminescence spectra also indicate a less intense and broader blue fluorescence spectrum detecting the presence of miniature sized sp 2 domains in the near vicinity of π* electronic states which favor the variable range hopping transport phenomena. This study on large area RGO thin films with very large carrier mobility fabricated by PLD process will be very useful for high mobility electronic device applications and could open a roadmap for further extensive research in functionalized 2D materials.

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“…We believe that there are two possible reasons for this observation. On the one hand, since the ablation procedure was carried out in air atmosphere, further oxide species can be created (CO, CO 2 ) inducing more structural and chemical defects [16].…”

Section: Resultsmentioning

confidence: 99%

Raman investigation of laser-induced structural defects of graphite oxide films

Romano

Torrisi

Cutroneo

et al. 2018

EPJ Web of Conferences

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Abstract. Since the beginning of intensive studies on graphene and graphitic materials, Raman spectroscopy has always been used as a characterisation technique. This is due to two main reasons: the non-destructive nature of this experimental technique and its ability to distinguish between the plethora of existing carbon materials. One of the most challenging research activities concerns the production of graphene microcircuits. To address this issue, a possible strategy is to directly reduce and pattern graphite oxide (GO) film by laser irradiation. The objective of this study is to evaluate the laser irradiation-induced structural changes on thin GO films by using Micro-Raman spectroscopy.We used as a source a Nd:YAG laser (1064 nm) and different laser fluences: 15 J/cm 2 , 7.5 J/cm 2 and 5 J/cm 2 . We have analyzed the modifications of the main Raman contributions of these graphitic materials: the D band (defect induced band), the G band (band due to sp 2 hybridized carbon atoms) and the 2D band (D band overtone). In particular, we found out that our figure of merit (FOM) parameters, i.e. the intensity ratio I D /I G (for the D band and G band) and I 2D /I G (for the 2D band and G band), change with the laser fluences, revealing a different effect induced by the laser irradiation. The best results are found in the sample irradiated with 5 J/cm 2 , suggesting that higher fluences do not lead to better results.

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Reduction of graphite oxide to graphene with laser irradiation

Cited by 168 publications

References 40 publications

How fast is the reaction of hydrated electrons with graphene oxide in aqueous dispersions?

How fast is the reaction of hydrated electrons with graphene oxide in aqueous dispersions?

Reduced Graphene Oxide Thin Films with Very Large Charge Carrier Mobility Using Pulsed Laser Deposition

Raman investigation of laser-induced structural defects of graphite oxide films

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