Graphene Oxide Multilayers Obtained from Bamboo: New Synthesis Method, Basic Properties, and Future Electronic Applications

Prías‐Barragán, J. J.; Gross, K.; Calderón, Hernando Ariza

doi:10.1002/9781119468455.ch130

Cited by 7 publications

(12 citation statements)

References 53 publications

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“…1: in the first pyrolysis step, from the carbonization process of the Bamboo raw material at 973 K for 1 h, BPA was obtained and collected in a decanting funnel glass; then, the BPA was deposited on quartz substrate by rollcoating. In the second pyrolysis step, roll-coated BPA was used as a source to obtain GOF at a fixed carbonization temperature of 973 K with an oxide atomic concentration of 5%, according to previous reports 46,48,49,52 . Then, GOF were obtained by a mechanical transfer method onto a Bakelite as substrate.…”

Section: Methodsmentioning

confidence: 99%

“…Then, GOF were obtained by a mechanical transfer method onto a Bakelite as substrate. For more details, see the references 47,48,51 . The authors confirm that all the methods in experimental research and field studies on plants, as the waste product of the commercial bamboo-guadua angustifolia Kunth, were performed in accordance with the relevant regulations.…”

Section: Methodsmentioning

confidence: 99%

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Temperature dependence of electrical conductivity and variable hopping range mechanism on graphene oxide films

Sánchez-Trujillo

Osorio-Maldonado

Prías‐Barragán

2023

Sci Rep

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The rapid development of optoelectronic applications for optical-to-electrical conversion has increased the interest in graphene oxide material. Here, graphene oxide films (GOF) were used as source material in an infrared photodetector configuration and the temperature dependence of the electrical conductivity was studied. GOF were prepared by the double-thermal decomposition (DTD) method at 973 K, with a fixed carbonization temperature, in a pyrolysis system, under a controlled nitrogen atmosphere, over quartz substrates. Graphene oxide films were mechanically supported in a photodetector configuration on Bakelite substrates and electrically contacted with copper wires and high-purity silver paint. Morphological images from the GOF’s surface were taken employing a scanning electron microscope and observed a homogeneous surface which favored the electrical contacts deposition. Vibrational characteristics were studied employing Raman spectroscopy and determined the typical graphene oxide bands. GOF were used to discuss the effect of temperature on the film’s electrical conductivity. Current–voltage (I–V) curves were taken for several temperatures varying from 20 to 300 K and the electrical resistance values were obtained from 142.86 to 2.14 kΩ. The GOF electrical conductivity and bandgap energy (Eg) were calculated, and it was found that when increasing temperature, the electrical conductivity increased from 30.33 to 2023.97 S/m, similar to a semiconductor material, and Eg shows a nonlinear change from 0.33 to 0.12 eV, with the increasing temperature. Conduction mechanism was described mainly by three-dimensional variable range hopping (3D VRH). Additionally, measurements of voltage and electrical resistance, as a function of wavelength were considered, for a spectral range between 1300 and 3000 nm. It was evidenced that as the wavelength becomes longer, a greater number of free electrons are generated, which contributes to the electrical current. The external quantum efficiency (EQE) was determined for this proposed photodetector prototype, obtaining a value of 40%, similar to those reported for commercial semiconductor photodetectors. This study provides a groundwork for further development of graphene oxide films with high conductivity in large-scale preparation.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Temperature dependence of electrical conductivity and variable hopping range mechanism on graphene oxide films

Sánchez-Trujillo

Osorio-Maldonado

Prías‐Barragán

2023

Sci Rep

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show abstract

“…For more details, see the references 36,37,40 . The authors con rm that all the methods in experimental research and eld studies on plants, as the waste product of the commercial bamboo-guadua angustifolia Kunth, were performed in accordance with the relevant regulations.…”

Section: Methodsmentioning

confidence: 99%

“…1; in the rst pyrolysis step, from the carbonization process of the Bamboo raw material at 973 K for 1 h, BPA was obtained and collected in a decanting funnel glass; then, BPA was deposited on quartz substrate by rollcoating. In the second pyrolysis step, roll-coated BPA was used as a source to obtain GOF at a xed carbonization temperature of 973 K with an oxide atomic concentration of 5%, according to previous reports 35,37,38,41 . Then, GOF were obtained by a mechanical transfer method onto a bakelite as substrate.…”

Section: Methodsmentioning

confidence: 99%

“…Prías-Barragán et al [36][37][38] reported a new pyrolysis method for GO single nanoplatelets and GOF synthesis from BPA with e ciencies around 90%, as well as their studies on the structural, morphological, electrical, thermal, optical, and magnetic properties 37,[39][40][41] , in addition to some potential applications, such as an IR emitter 36 , supercapacitors 42 , and optoelectronic devices 37 , among others. It has been identi ed that pyrolytic GO is a material with a polycrystalline structure, with magnetic behavior in ferromagnetism order at room temperature induced by topographic defects 43 , vibrational response of thermal insulator material (due to hydroxyl bridges) 39 , and whose multifunctional oxides give it a semiconductor electrical behavior with a narrow bandgap (0.11 to 0.30 eV) 35 .…”

Section: Introductionmentioning

confidence: 99%

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Temperature Dependence of Electrical Conductivity and Variable Hopping Range Mechanism on Graphene Oxide Films

Sánchez-Trujillo

Osorio-Maldonado

Prías‐Barragán

2022

Preprint

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Rapid development of optoelectronic applications for optical-to-electrical conversion has increased the interest in graphene oxide (GO) material. Here, graphene oxide films (GOF) were used as source material in an infrared photodetector configuration and temperature dependence of the electrical conductivity was studied. GOF were prepared by double-thermal decomposition (DTD) method at 973 K, as fixed carbonization temperature (TCA), in a pyrolysis system, under a controlled nitrogen atmosphere, over quartz substrates. Graphene oxide films were mechanically supported in a photodetector configuration on bakelite substrates and electrically contacted with copper wires and high-purity silver paint. Vibrational characteristics were studied employing Raman spectroscopy and it was determined the typical graphene oxide bands. GOF were used to discuss the effect of temperature on the film’s electrical conductivity. Current-voltage (IV) curves were taken for several temperatures varying from 20 to 300 K and the electrical resistance values were obtained from 142.86 to 2.14 kΩ. The GOF electrical conductivity and bandgap energy (Eg) were calculated and it was found that when increasing temperature, the electrical conductivity increased from 30.33 to 2023.97 S/m, similar to a semiconductor material, and Eg shows a nonlinear change from 0.33 to 0.12 eV, with the increasing temperature. Conduction mechanism was described mainly by 3D-variable range hopping. Aditionally, measurements of voltage and electrical resistance, as a function of wavelength were considered, for a spectral range between 1300 nm and 3000 nm. It was evidenced that as the wavelength becomes longer, a greater number of free electrons are generated, which contribute to the electrical current. The EQE was determined for this proposed photodetector prototype, obtaining a value of 40%, similar to those reported for commercial semiconductor photodetectors. This study provides a groundwork for further development of graphene oxide films with high conductivity in large-scale preparation.

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Magnetism in graphene oxide nanoplatelets: The role of hydroxyl and epoxy bridges

Prías‐Barragán

González‐Hernández

Hoyos-Ariza

et al. 2022

Journal of Magnetism and Magnetic Materials

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Graphene Oxide Multilayers Obtained from Bamboo: New Synthesis Method, Basic Properties, and Future Electronic Applications

Cited by 7 publications

References 53 publications

Temperature dependence of electrical conductivity and variable hopping range mechanism on graphene oxide films

Temperature dependence of electrical conductivity and variable hopping range mechanism on graphene oxide films

Temperature Dependence of Electrical Conductivity and Variable Hopping Range Mechanism on Graphene Oxide Films

Magnetism in graphene oxide nanoplatelets: The role of hydroxyl and epoxy bridges

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