Structure dependence of gas sensing responsivity on graphene nanoribbons covered TiO2 nanotubes, nano-bugles array

Huang, Bohr–Ran; Chen, Yu-Jyun; Hung, Shang-Chao

doi:10.1007/s10854-022-07786-w

Cited by 1 publication

(1 citation statement)

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“…The field emission performance improvement study via the graphene aligned with the gradient on the substrate surface shows the field enhancement factor increasing and the turn-on field decreasing because of the graphene composition [ 21 ]. Another responsivity study of the heteroepitaxial interfaces with 2D graphene covered on 1D nanotubes as a hydrogen gas sensing layer shows the aggravation of composition effect with increasing graphene content because of the gas diffusion interactions between two-dimensional layered graphene structure and various geometries [ 22 ]. Moreover, the biosensors study for glucose detection shows the electrochemical interaction, whereas glucose oxidase (GOx) is adsorbing on laser-induced graphene electrodes because of its high chemical stability, excellent electrical conductivity, and high specific surface area [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

The Efficiency Study of Graphene Synthesis on Copper Substrate via Chemical Vapor Deposition Method with Methanol Precursor

et al. 2023

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Few-layer graphene was successfully synthesized on copper foil via chemical vapor deposition with methanol as a carbon source. This was confirmed by optical microscopy observation, Raman spectra measurement, I2D/IG ratio calculation, and 2D-FWHM value comparisons. Monolayer graphene was also found in similar standard procedures, but it required higher growth temperature and longer time periods. The cost-efficient growth conditions for few-layer graphene are thoroughly discussed via TEM observation and AFM measurement. In addition, it has been confirmed that the growth period can be shortened by increasing growth temperature. With the H2 gas flow rate fixed at 15 sccm, few-layer graphene was synthesized at the lower growth temperature of 700 °C in 30 min, and at 900 °C growth temperature in only 5 min. Successful growth was also achieved without adding hydrogen gas flow; this is probably because H2 can be induced from the decomposition of methanol. Through further defects study of few-layer graphene via TEM observation and AFM measurement, we tried to find possible ways for efficiency and quality management in graphene synthesis in industrial applications. Lastly, we investigated graphene formation after pre-treatment with different gas compositions, and found that gas selection is a crucial factor for a successful synthesis.

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Section: Introductionmentioning

confidence: 99%