Holographic patterning of graphene-oxide films by light-driven reduction

Orabona, Emanuele; Ambrosio, Antonio; Longo, Angela; Carotenuto, G.; Nicolais, L.; Maddalena, P.

doi:10.1364/ol.39.004263

Cited by 20 publications

(17 citation statements)

References 32 publications

(38 reference statements)

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“…The ability of lasers to reduce GO locally on a sample has been proposed for several fi elds of applications: i) the formation of electrical devices either using DLW [ 21b , 55d-f,j,y,z , 59a , 69b , 91 ] (including batteries), [ 82 ] or ablation and micropatterning; [ 60,92 ] ii) the usage of graphene in laser devices including modelocking lasers [ 93 ] and photonics, and; iii) applications in medicine for the treatment of some diseases. [ 81,83,94 ] The application of DLW and micropatterning were already discussed in a previous review by Zhang et al; [ 24 ] graphene application to terahertz (THz) optics were also overviewed by several researcher groups.…”

Section: Applications Of Laser-irradiated Graphene and Graphene Oxidementioning

confidence: 99%

Recent Advances in Laser Utilization in the Chemical Modification of Graphene Oxide and Its Applications

Trusovas

Račiukaitis

Niaura

et al. 2015

Advanced Optical Materials

146

101

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the manipulation of graphene and its derivatives occupy a relatively insignifi cant part, i.e., less than 1%. The fi rst publications on graphene modifi cation with laser irradiation appeared in 2008, however, since 2010, the number of publications has risen exponentially.Graphene oxide (GO) has emerged as a versatile material for nanocarbon research. Several types of oxygen-containing functional groups present on the basal plane, and the sheet edge allows GO to interact with a broad range of organic and inorganic materials. [ 9 ] Furthermore, GO is an abundant and low-cost material synthesized from graphite or graphite oxide; it retains a layered structure but, at the same time, it can be characterized by the loss of electronic conjugation caused by the oxy groups at the edge or plane defects. GO has a potential use in energy, [ 10 ] electronics, [ 11 ] molecular sensing areas, [ 12 ] catalysis, [ 13 ] etc. Moreover, it can be reduced chemically or thermally in order to achieve graphenelike properties. [ 14 ] The material produced during such a procedure is usually referred to as "reduced GO" (rGO). However, residual defects such as remnant oxygen atoms, [ 15 ] Stone-Wales defects (pentagon-heptagon pairs), [ 16 ] and holes [ 17 ] appearing due to the loss of carbon (in the form of CO or CO 2 ) from the basal plane [ 18 ] limit the electronic quality of rGO.A laser is a powerful tool which is used for various applications in industry, medicine, science, and material processing. [ 19 ] It is usually employed in different processes such as ablation, etching, cutting of various materials, as well as direct A dramatic rise in research interest in laser-induced graphene oxide (GO) reduction and modifi cation requires an overview of the most recent works on this subject. Typical methods for the recognition and confi rmation of modifi ed graphene and its derivatives, such as Raman, Fourier-transform infra-red (FTIR), X-ray photoelectron (XP), and ultraviolet-visible (UV-vis) spectroscopies, are introduced briefl y in this review. A major part of the survey is devoted to the main modifi cation ways and the laser parameters used in the literature. A discussion of possible reduction and modifi cation mechanisms is also presented. Recent applications, especially in the biomedical fi eld such as cell therapy treatment, as well as signifi cant results of GO modifi cation, are discussed in detail. Finally, perspectives for the application of laser-induced GO modifi cations in passive THz photonics and biomedicine are briefl y addressed.

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Section: Applications Of Laser-irradiated Graphene and Graphene Oxidementioning

confidence: 99%

Recent Advances in Laser Utilization in the Chemical Modification of Graphene Oxide and Its Applications

Trusovas

Račiukaitis

Niaura

et al. 2015

Advanced Optical Materials

146

101

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“…6), can be envisaged as prototypes of electronic elements for applications in electronics and optoelectronics, such as thin film capacitors 6,18,20 and field transistors 6 . Importantly, our approach is suitable for direct mask-free production of not only in-plane or sandwiched structures and devices 6,7,12,14,22 but also fully 3D interconnecting patterns, structures and nonplanar surfaces, which is one of the key advances as compared with, for example, in-plane structures presented in a pioneering study on photoreduction of GO in solid thin films 11 . To further demonstrate this capability, we produce an array of rGO trefoil knots ( Fig.…”

Section: Characterization Of Rgomentioning

confidence: 99%

Three-dimensional patterning of solid microstructures through laser reduction of colloidal graphene oxide in liquid-crystalline dispersions

et al. 2015

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Graphene materials and structures have become an essential part of modern electronics and photovoltaics. However, despite many production methods, applications of graphene-based structures are hindered by high costs, lack of scalability and limitations in spatial patterning. Here we fabricate three-dimensional functional solid microstructures of reduced graphene oxide in a lyotropic nematic liquid crystal of graphene oxide flakes using a pulsed nearinfrared laser. This reliable, scalable approach is mask-free, does not require special chemical reduction agents, and can be implemented at ambient conditions starting from aqueous graphene oxide flakes. Orientational ordering of graphene oxide flakes in self-assembled liquid-crystalline phases enables laser patterning of complex, three-dimensional reduced graphene oxide structures and colloidal particles, such as trefoil knots, with 'frozen' orientational order of flakes. These structures and particles are mechanically rigid and range from hundreds of nanometres to millimetres in size, as needed for applications in colloids, electronics, photonics and display technology.

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“…[7,8]. Several GO synthesis methods, which are alternatives to the original Hammer's method [9][10][11][12], and new chemical reduction schemes are being proposed [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. The GO conversion to r-GO usually requires some reducing agents or a high temperature [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Green Solid-State Chemical Reduction of Graphene Oxide Supported on a Paper Substrate

2020

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The reduction of graphene oxide (GO) thin films deposited on substrates is crucial to achieve a technologically useful supported graphene material. However, the well-known thermal reduction process cannot be used with thermally unstable substrates (e.g., plastics and paper), in addition photo-reduction methods are expensive and only capable of reducing the external surface. Therefore, solid-state chemical reduction techniques could become a convenient approach for the full thickness reduction of the GO layers supported on thermally unstable substrates. Here, a novel experimental procedure for quantitative reduction of GO films on paper by a green and low-cost chemical reductant (L-ascorbic acid, L-aa) is proposed. The possibility to have an effective mass transport of the reductant inside the swelled GO solid (gel-phase) deposit was ensured by spraying a reductant solution on the GO film and allowing it to reflux in a closed microenvironment at 50 °C. The GO conversion degree to reduced graphene oxide (r-GO) was evaluated by Fourier transform infrared spectroscopy (FT-IR) in attenuated total reflectance (ATR) mode and X-ray Diffraction (XRD). In addition, morphology and wettability of GO deposits, before and after reduction, were confirmed by digital USB microscopy, scanning electron microscopy (SEM), and contact angle measurements. According to these structural characterizations, the proposed method allows a bulky reduction of the coating but leaves to a GO layer at the interface, that is essential for a good coating-substrate adhesion and this special characteristic is useful for industrial exploitation of the material.

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Holographic patterning of graphene-oxide films by light-driven reduction

Cited by 20 publications

References 32 publications

Recent Advances in Laser Utilization in the Chemical Modification of Graphene Oxide and Its Applications

Recent Advances in Laser Utilization in the Chemical Modification of Graphene Oxide and Its Applications

Three-dimensional patterning of solid microstructures through laser reduction of colloidal graphene oxide in liquid-crystalline dispersions

Green Solid-State Chemical Reduction of Graphene Oxide Supported on a Paper Substrate

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