Wafer-scale single-crystal monolayer graphene grown on sapphire substrate

Li, Junzhu; Chen, Mingguang; Samad, Abdus; Dong, Haocong; Ray, A. K.; Zhang, Junwei; Jiang, Xiaochuan; Schwingenschlögl, Udo; Domke, Jari; Chen, Cailing; Han, Yu; Fritz, Torsten; Ruoff, Rodney S.; Tian, Bo; Zhang, Xixiang

doi:10.1038/s41563-021-01174-1

Cited by 145 publications

(120 citation statements)

References 44 publications

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“…In addition, the SAED pattern of CSIG was a set of diffraction rings instead of diffraction spots, which was significantly different from previously reported graphene. 12 , 17 , 54 The ring pattern suggested that the CSIG is made up of random stacking of the graphene layers. Notably, the laser-induced graphene reported by Tour’s group also showed (002) and (100) diffraction rings instead of diffraction spots in an SAED pattern.…”

Section: Resultsmentioning

confidence: 99%

Concentrated Solar Induced Graphene

Zhang

et al. 2022

ACS Omega

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Graphene is one of the most promising nanomaterials with many extraordinary properties and numerous exciting applications. In this work, a green, facile, and rapid method was developed to prepare graphene directly from common biomass materials such as banana peels, cantaloupe peels, coconut peels, and orange peels by using concentrated solar radiation. The basic principle of this method is photothermal conversion. On a sunny day, the sunlight was concentrated by a biconvex lens to form a focused light spot with a high temperature above 1000 °C, which can directly convert fruit peels into graphene nanosheets within 2–3 s. The product is named concentrated-solar-induced graphene (CSIG) based on the process employed to generate it. The resulting CSIG was characterized using a range of analytical techniques. The Raman spectrum of the CSIG displayed two distinct peaks corresponding to the D and G bands at ∼1343 and ∼1568 cm –1 , respectively. Scanning electron microscopy, transmission electron microscopy, and X-ray diffraction were used to confirm that the CSIG consists of a few layers of turbostratic graphene nanosheets. Atomic force microscopy characterization revealed that the CSIG nanosheets have a thickness of ∼4 nm. The antibacterial potential of the CSIG was also explored. The CSIG had a strong inhibitory effect on the growth of Escherichia coli . This simple, green, and straightforward method for producing graphene may open a new route for turning waste into useful materials: an inexhaustible and pollution-free natural resource can be readily exploited by using a solar tracker-lens system for the large-scale production of graphene materials directly from low-cost biomass materials.

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Section: Resultsmentioning

confidence: 99%

Concentrated Solar Induced Graphene

Zhang

et al. 2022

ACS Omega

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“…Besides, in situ synchrotron techniques with higher spatial, energy, and time resolutions can further improve the sensitivity and the speed of spectral acquisition which will bring unexpected discoveries to understand the facet formation mechanism, the reaction processes in a real circumstance, and the structure-property relationships. (6) Combining in situ characterization with theoretical calculations will provide a new hitting-point to reveal the growth mechanism and activity and selectivity of materials. In addition, theoretical investigations can also be employed to predict new materials with exceptional properties, which can help scientists to design and synthesize target materials.…”

Section: Discussionmentioning

confidence: 99%

Facet engineering of ultrathin two-dimensional materials

Xia

Zeng

et al. 2022

Chem. Soc. Rev.

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“…But it is hard to get the uniform and high‐quality wafer‐scale single crystal due to the introduction of grain boundaries, vacancies, random nucleation in traditional methods. Some efforts have done to grow the wafer‐scale single crystal inorganic 2D, containing graphene, [ 202 ] TMDs, [ 203,204 ] h‐BN, [ 205 ] and Bi 2 O 2 Se. [ 206 ] As for organic materials, a class of ultrathin 2D organic single crystal have been explored in the recent years.…”

Section: Applications and Prospectsmentioning

confidence: 99%

Recent Progress in 2D Inorganic/Organic Charge Transfer Heterojunction Photodetectors

Han

Wang

Han

et al. 2022

Adv Funct Materials

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2D materials possess superior optoelectronic properties, such as ultrahigh mobility and broadband photoresponse, making them one of the most vital platforms for diversified photodetectors. However, atomic thickness 2D materials usually suffer from intrinsic low absorption. To promote the photo detector performance, a feasible method is to integrate the 2D materials with lowcost, flexible, and tunable organics that form a charge transfer (CT) heterojunction. As results, indepth multifunctional CT 2Dinorganic/organic detector exhibits extended functions such as lowpower consumption, in memory detection, and opticalbio synapse to meet the demand of contem porary photonic cell. Particularly, the progresses in waferscale monocrystal of both 2D and organic materials render vast potential applications with operation frequencies ranging from ultraviolet to terahertz. Here, the recent advances of 2Dinorganic/organic CT photodetectors are comprehensively reviewed by several classifications. Future developments and applications in optical biology, synapsis, and machine vision are also highlighted.

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Wafer-scale single-crystal monolayer graphene grown on sapphire substrate

Cited by 145 publications

References 44 publications

Concentrated Solar Induced Graphene

Concentrated Solar Induced Graphene

Facet engineering of ultrathin two-dimensional materials

Recent Progress in 2D Inorganic/Organic Charge Transfer Heterojunction Photodetectors

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