Advances and Applications of Carbon Nanotubes

Morais, Simone

doi:10.3390/nano13192674

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…After grafting HFIP, some of the adsorption bands disappeared while others, such as C=O, decreased in intensity. This phenomenon may be due to the depletion of -COOH groups in the carboxy-terminated MWCNTs through the formation of amide bonds [49]. and Fe 2p 3/2 , respectively [50,51].…”

Section: Characterization Of Materials and Discussionmentioning

confidence: 99%

Hierarchical Nanoheterostructure of HFIP-Grafted α-Fe2O3@Multiwall Carbon Nanotubes as High-Performance Chemiresistive Sensors for Nerve Agents

Wang,

Liu,

et al. 2024

Nanomaterials

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New and efficient sensors of nerve agents are urgently demanded to prevent them from causing mass casualties in war or terrorist attacks. So, in this work, a novel hierarchical nanoheterostructure was synthesized via the direct growth of α-Fe2O3 nanorods onto multiwall carbon nanotube (MWCNT) backbones. Then, the composites were functionalized with hexafluoroisopropanol (HFIP) and successfully applied to detect dimethyl methylphosphonate (DMMP)-sarin simulant gas. The observations show that the HFIP-α-Fe2O3@MWCNT hybrids exhibit outstanding DMMP-sensing performance, including low operating temperature (220 °C), high response (6.0 to 0.1 ppm DMMP), short response/recovery time (8.7 s/11.9 s), as well as low detection limit (63.92 ppb). The analysis of the sensing mechanism demonstrates that the perfect sensing performance is mainly due to the synergistic effect of the chemical interaction of DMMP with the heterostructure and the physical adsorption of DMMP by hydrogen bonds with HFIP that are grafted on the α-Fe2O3@MWCNTs composite. The huge specific surface area of HFIP-α-Fe2O3@MWCNTs composite is also one of the reasons for this enhanced performance. This work not only offers a promising and effective method for synthesizing sensitive materials for high-performance gas sensors but also provides insight into the sensing mechanism of DMMP.

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Section: Characterization Of Materials and Discussionmentioning

confidence: 99%

Hierarchical Nanoheterostructure of HFIP-Grafted α-Fe2O3@Multiwall Carbon Nanotubes as High-Performance Chemiresistive Sensors for Nerve Agents

Wang,

Liu,

et al. 2024

Nanomaterials

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“…At the same time, CNTs, with their outstanding properties (such as high electrical conductivity, thermal conductivity, and strength), also have enormous potential for applications in various fields, especially in thermal dissipation [7][8][9][10]. Notably, some specific types of CNTs boast remarkably high thermal conductivity, exceeding 2,300-3,000 W mK −1 [11,12], surpassing even diamond and most metals [13].…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, porous copper is chosen as the base metal to manufacture our carbon nanocomposites, with the goal of achieving a reasonable price while ensuring decent thermal and electrical conductivity [7,19]. Its unique porosity traps light and promotes internal reflection, significantly enhancing heat absorption [20,21].…”

Section: Introductionmentioning

confidence: 99%

Preliminary fabrication and analysis of a novel porous Cu-CNT composite for photothermal applications

Nguyen,

Mai,

Nguyen

et al. 2024

Mater. Res. Express

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Employing Chemical Vapor Deposition (CVD), we created and then investigated properties of a novel carbon-nanotube porous-copper composite (porous Cu-CNT composite). Field-Emission Scanning Electron Microscopy (FESEM) and Energy-Dispersive X-ray Spectroscopy (EDX) clearly revealed successful coating of CNTs, with its density increasing proportionally with the deposition time. In addition, Raman spectroscopy confirmed the constitution of the composite, which included oxygen, copper, and a high level of carbon. We also found out that the higher density of CNTs led to a significant improvement in light absorption in the visible spectrum, compared with the uncoated porous copper. This special property, combined with the porosity of the copper sample, as well as the exceptional thermal and optical properties of CNTs, makes the composite a highly promising candidate for photothermal applications

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Synthesis and Application of New Selanylfullerene Derivatives as Photosensitizers for Photodynamic Therapy

Soares,

Vargas,

Ravanello

et al. 2024

Chemistry An Asian Journal

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This study aims to describe the synthesis of a new class of selanylfullerene derivatives in a convergent strategy route, affording the desired products in a few steps and in good yields. C60 compounds were evaluated as photosensitizers to be used in photodynamic therapy (PDT) via the generation of singlet oxygen (1O2), using the chemical trapping method. The photooxidation of the chemical probe1,3‐diphenylisobenzofuran (DPBF) sensitized by selanylfullerenes followed a first‐order kinetic and the values of singlet oxygen quantum yields (ΦΔ) are appropriate for its use in PDT. The electronic absorption spectra, and the intersystem crossing tax rates for the most prominent synthesized compounds were calculated using the density functional theory and the Marcus electron transfer theory, with the theoretical results confirming the experimental findings.

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Advances and Applications of Carbon Nanotubes

Cited by 7 publications

References 24 publications

Hierarchical Nanoheterostructure of HFIP-Grafted α-Fe2O3@Multiwall Carbon Nanotubes as High-Performance Chemiresistive Sensors for Nerve Agents

Hierarchical Nanoheterostructure of HFIP-Grafted α-Fe2O3@Multiwall Carbon Nanotubes as High-Performance Chemiresistive Sensors for Nerve Agents

Preliminary fabrication and analysis of a novel porous Cu-CNT composite for photothermal applications

Synthesis and Application of New Selanylfullerene Derivatives as Photosensitizers for Photodynamic Therapy

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