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Fluorination of vertically aligned carbon nanotubes: from CF₄ plasma chemistry to surface functionalization.

ABSTRACT: The surface chemistry of plasma fluorinated vertically aligned carbon nanotubes (vCNT) is correlated to the CF₄ plasma chemical composition. The results obtained via FTIR and mass spectrometry are combined with the XPS and Raman analysis of the sample surface showing the dependence on different plasma parameters (power, time and distance from the plasma region) on the resulting fluorination. Photoemission and absorption spectroscopies are used to investigate the evolution of the electronic properties as a function of the fluorine content at the vCNT surface. The samples suffer a limited ageing effect, with a small loss of fluorine functionalities after two weeks in ambient conditions.

SUBMITTER: Struzzi C

PROVIDER: S-EPMC5588556 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Fluorination of vertically aligned carbon nanotubes: from CF<sub>4</sub> plasma chemistry to surface functionalization.

Struzzi Claudia C Scardamaglia Mattia M Colomer Jean-François JF Verdini Alberto A Floreano Luca L Snyders Rony R Bittencourt Carla C

Beilstein journal of nanotechnology 20170821

The surface chemistry of plasma fluorinated vertically aligned carbon nanotubes (vCNT) is correlated to the CF<sub>4</sub> plasma chemical composition. The results obtained via FTIR and mass spectrometry are combined with the XPS and Raman analysis of the sample surface showing the dependence on different plasma parameters (power, time and distance from the plasma region) on the resulting fluorination. Photoemission and absorption spectroscopies are used to investigate the evolution of the elect ...[more]

PMID: 28904833

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Project description:Currently, there is a lack of ultrasensitive diagnostic tool to detect some diseases such as ischemic stroke, thereby impacting effective and efficient intervention for such diseases at an embryonic stage. In addition to the lack of proper detection of the neurological diseases, there is also a challenge in the treatment of these diseases. Carbon nanotubes have a potential to be employed in solving the theragnostic challenges in those diseases. In this study, carbon nanotubes were successfully synthesized for potential application in the detection and treatment of the neurological diseases such as ischemic stroke. Vertically aligned multiwalled carbon nanotubes (VA-MWCNTs) were purified with HCl, carboxylated with H2SO4:HNO3 (3:1) and acylated with SOCl2 for use in potential targeting studies and for the design of a carbon-based electrode for possible application in the diagnosis of neurological diseases, including ischemic stroke. MWCNTs were washed, extracted from the filter membranes and dried in a vacuum oven at 60 °C for 24 h prior to functionalization and PEGylation. CNTs were characterized by SEM, TEM, OCA, DLS, CV and EIS. The HCl-treated CNT obtained showed an internal diameter, outer diameter and thickness of 8 nm, 34 nm and 75 µm, while these parameters for the H2SO4-HNO3-treated CNT were 8 nm, 23 nm and 41µm, respectively. PEGylated CNT demonstrated zeta potential, polydispersive index and particle size distribution of 6 mV, 0.41 and 98 nm, respectively. VA-MWCNTs from quartz tube were successfully purified, carboxylated, acylated and PEGylated for potential functionalization for use in targeting studies. For designing the carbon-based electrode, VA-MWCNTs on silicon wafer were successfully incorporated into epoxy resin for diagnostic applications. Functionalized MWCNTs were nontoxic towards PC-12 neuronal cells. In conclusion, vertically super-aligned MWCNTs have been successfully synthesized and functionalized for possible theragnostic biomedical applications in neurological disorders such as ischemic stroke.

Dataset Information

Fluorination of vertically aligned carbon nanotubes: from CF₄ plasma chemistry to surface functionalization.

Publications

Fluorination of vertically aligned carbon nanotubes: from CF<sub>4</sub> plasma chemistry to surface functionalization.

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Dataset Information

Fluorination of vertically aligned carbon nanotubes: from CF4 plasma chemistry to surface functionalization.

Publications

Fluorination of vertically aligned carbon nanotubes: from CF<sub>4</sub> plasma chemistry to surface functionalization.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Fluorination of vertically aligned carbon nanotubes: from CF₄ plasma chemistry to surface functionalization.