Bulk Production of Any Ratio ¹²C:¹³C Turbostratic Flash Graphene and Its Unusual Spectroscopic Characteristics

Abstract

As graphene enjoys worldwide research and deployment, the biological impact, geologic degradation, environmental retention, and even some physical phenomena remain less well studied. Bulk production of 13 Cgraphene yields a powerful route to study all of these questions. Gram-scale synthesis of high-quality and high-purity turbostratic flash graphene with varying amounts of 13 C-enrichment, from 5% to 99%, is reported here. The material is characterized by solid state NMR spectroscopy, Raman spectroscopy, IR spectroscopy, X-ray photoelectron spectroscopy, and inductively coupled plasma mass spectrometry. Notably, an unusual enhancement in the Raman spectroscopic D′ peak is observed, resulting from the modification in vibrational frequency through isotopic enrichment favoring intravalley phonon scattering modes. While the IR absorbance spectrum of graphene is for the most part silent, we prepare here 13 C-enhanced graphene samples that show a large aromatic 12 C 13 C stretch that reveals this IR-active mode.

The Future of Flash Graphene for the Sustainable Management of Solid Waste

“…Recently, we exploited the FJH method to synthesize any ratio 12 C: 13 C tFG with different 13 C initial loading. This method has potential future applications in materials science, geochemistry, 2D physical studies, and biological applications . Interestingly, an unusual enhanced Raman spectra D′ band was reported with the long-sought CC stretch in the infrared spectrum.…”

“…This method has potential future applications in materials science, geochemistry, 2D physical studies, and biological applications. 30 Interestingly, an unusual enhanced Raman spectra D′ band was reported with the long-sought CC stretch in the infrared spectrum. Such bulk production of tFG can be used for research on the biological and environmental fate and transport of graphene.…”

“…Interestingly, an unusual enhanced Raman spectra D′ band was reported with the long-sought CC stretch in the infrared spectrum. Such bulk production of tFG can be used for research on the biological and environmental fate and transport of graphene …”

“…Such bulk production of tFG can be used for research on the biological and environmental fate and transport of graphene. 30 Waste Management and Waste Valorization in the Form of Flash Graphene. Common Practices in Municipal Solid Waste Management.…”

Research on Throat Speech Signal Detection Based on a Flexible Graphene Piezoresistive Sensor

“…The Raman spectrum and scanning electron microscopy (SEM) tests are used to characterize the quality and properties of graphene films . The thickness and flaw of graphene are obtained from the position, half-peak width (the ratio of the 2D peak to the G peak represents the number of graphene layers), and peak height of the peaks (D peak is the defect peak of graphene) in the Raman spectrogram. − The SEM images can detect the microstructure of graphene. The Raman test experiment uses a 532 nm laser to excite electrons on the valence band of graphene to jump to the conduction band, where the electrons interact with phonons and scatter, resulting in different Raman characteristic peaks.…”