Universal dry synthesis and patterning of high-quality and -purity graphene quantum dots by ion-beam assisted chemical vapor deposition

Ha, Ji Soo; Lee, Na Eun; Yoon, Young Jun; Lee, Seoung Ho; Hwang, Yong Seok; Suk, Jae Kwon; Lee, Chan Young; Kim, Cho Rong; Yeo, Sunmog

doi:10.1016/j.carbon.2021.09.071

Cited by 13 publications

(9 citation statements)

References 40 publications

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“…These products could interact with the solvent, commonly N,N-dimethylformamide (DMF), and be passivated. Ha et al (2022) produced GQDs by CVD using gaseous methane as the precursor under b-u approach. The GQDs were nucleated in a wafer silicon at 1000 C. The CVD permitted to obtain patterns of GQDs with a high purity owing to the ionic beam.…”

Section: Graphene Quantum Dotsmentioning

confidence: 99%

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Carbon dots: Types, preparation, and their boosted antibacterial activity by photoactivation. Current status and future perspectives

Lagos

García

Cuadrado

et al. 2023

WIREs Nanomed Nanobiotechnol

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Carbon dots (CDs) correspond to carbon‐based materials (CBM) with sizes usually below 10 nm. These nanomaterials exhibit attractive properties such us low toxicity, good stability, and high conductivity, which have promoted their thorough study over the past two decades. The current review describes four types of CDs: carbon quantum dots (CQDs), graphene quantum dots (GQDs), carbon nanodots (CNDs), and carbonized polymers dots (CPDs), together with the state of the art of the main routes for their preparation, either by “top‐down” or “bottom‐up” approaches. Moreover, among the various usages of CDs within biomedicine, we have focused on their application as a novel class of broad‐spectrum antibacterial agents, concretely, owing their photoactivation capability that triggers an enhanced antibacterial property. Our work presents the recent advances in this field addressing CDs, their composites and hybrids, applied as photosensitizers (PS), and photothermal agents (PA) within antibacterial strategies such as photodynamic therapy (PDT), photothermal therapy (PTT), and synchronic PDT/PTT. Furthermore, we discuss the prospects for the possible future development of large‐scale preparation of CDs, and the potential for these nanomaterials to be employed in applications to combat other pathogens harmful to human health. This article is categorized under: Therapeutic Approaches and Drug Discovery > Nanomedicine for Infectious Disease

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Section: Graphene Quantum Dotsmentioning

confidence: 99%

“…Ha et al (2022) produced GQDs by CVD using gaseous methane as the precursor under b‐u approach. The GQDs were nucleated in a wafer silicon at 1000°C.…”

Section: Types and Preparation Of Cdsmentioning

confidence: 99%

Carbon dots: Types, preparation, and their boosted antibacterial activity by photoactivation. Current status and future perspectives

Lagos

García

Cuadrado

et al. 2023

WIREs Nanomed Nanobiotechnol

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“…Furthermore, the HRTEM image and FFT pattern of the GQDs (Fig. 2 c and inset) reveal that they had a crystalline structure [ 4 , 21 , 28 ] and a uniform particle size with an average diameter of 7.88 ± 2.29 nm (Fig. 2 d).…”

Section: Resultsmentioning

confidence: 99%

“…Since most GQDs are fabricated through the solution-based approaches, it is difficult to obtain GQD arrays or patterns for device implementation. However, in our previous work, we introduced a simple and efficient method for creating pure and patterned GQDs using ion-beam assisted chemical vapor deposition (CVD) [ 28 ]. On the other hands, unlike the GQD synthesis, CNTs have been mainly produced by dry methods such as arc discharge, laser ablation, and CVD [ 8 , 9 , 29 – 35 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis mechanism from graphene quantum dots to carbon nanotubes by ion-sputtering assisted chemical vapor deposition

Ha,

Lee,

Park

et al. 2024

Discover Nano

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We present the first work of the synthesis mechanism from graphene quantum dots (GQDs) to carbon nanotubes (CNTs) by an ion-sputtering assisted chemical vapor deposition. During the annealing process, a Pt thin film deposited by the ion-sputtering was dewetted and agglomerated to form many nanometer-sized particles, leading to Pt nanoparticles (PtNPs) that can act as catalysts for creating carbon allotropes. The shape of the allotropes can be effectively tailored from GQDs to CNTs by controlling three key parameters such as the dose of catalytic ions (D), amounts of carbon source (S), and thermal energy (T). In our work, it was clearly proved that the growth control from GQDs to CNTs has a comparably proportional relationship with D and S, but has a reverse proportional relationship with T. Furthermore, high-purity GQDs without any other by-products and the CNTs with the cap of PtNPs were generated. Their shapes were appropriately controlled, respectively, based on the established synthesis mechanism. Graphical abstract

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“…Currently, owing to the available ion sources, the as-synthesized 2D materials are mainly focused on graphene. [146][147][148][149][150][151] Either carbon ions or carbon clusters are used as the irradiation source. By utilizing this method, the direct growth of 2D materials on SiO 2 /Si and SiC substrates has been realized, 84 which is promising in future device applications.…”

Section: Other Structural Effects Under Ion Irradiationmentioning

confidence: 99%

Recent progresses on ion beam irradiation induced structure and performance modulation of two-dimensional materials

Luo

Cheng

et al. 2023

Nanoscale

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Universal dry synthesis and patterning of high-quality and -purity graphene quantum dots by ion-beam assisted chemical vapor deposition

Cited by 13 publications

References 40 publications

Carbon dots: Types, preparation, and their boosted antibacterial activity by photoactivation. Current status and future perspectives

Carbon dots: Types, preparation, and their boosted antibacterial activity by photoactivation. Current status and future perspectives

Synthesis mechanism from graphene quantum dots to carbon nanotubes by ion-sputtering assisted chemical vapor deposition

Recent progresses on ion beam irradiation induced structure and performance modulation of two-dimensional materials

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