Controlling the nanostructure and stability of a-C:H:N plasma polymers

Hegemann, Dirk

doi:10.1016/j.tsf.2014.11.087

Cited by 18 publications

(15 citation statements)

References 44 publications

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“…Within the confidence intervals, the N/C ratio remains nearly constant in our experimental window as also reported for N‐PPF synthesized in CW mode from ammonia/hydrocarbon gas mixtures (Figure a) . This behavior is generally explained by a similar chemical fragmentation pattern of precursors for a certain range of energy dissipated in the discharge.…”

Section: Resultssupporting

confidence: 85%

“…Indeed, for most of synthesis conditions, PPF are pinhole‐free and perfectly smooth, thus, limiting further development in this field based on the previous considerations about the importance of nanostructuring organic‐based coatings. For sake of completeness, it should, however, be noted that recent studies have demonstrated that under specific conditions, PPF exhibit complex nanostructured morphology (e.g., petal/dome‐like nanostructures, nano‐pillars, nano‐ribbons, nano‐columns, or nanoporous coating) . Nevertheless, the availability to tailor the size, the shape, and the length of the nano‐structures is strongly limited and highly challenging.…”

Section: Introductionmentioning

confidence: 99%

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Tailoring the chemistry and the nano-architecture of organic thin films using cold plasma processes

Thiry

Chauvin

Mel

et al. 2017

Plasma Process Polym

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In this work, we report on the development of a novel approach based on three different plasma-based processes (i.e., plasma polymerization, magnetron sputtering, and plasma etching) to fabricate nanostructured polymer thin films. Our strategy involves at first the formation of nitrogen containing plasma polymer film subsequently covered by silver nanoparticles, serving as a hard etching mask, using magnetron sputtering. Then, the exposition of the material to a complex mixture of highly reactive radicals, ions, and photons results in the structuring at the nanoscale of the functionalized plasma polymer films. It has been demonstrated that the dimension, the shape (e.g,. nanodome, nano-cone, nano-valley, inter-connected porous network, . . .) and the chemical composition of the nanoobjects can be tailored by adjusting the plasma parameters in each step of our overall procedure.

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Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Tailoring the chemistry and the nano-architecture of organic thin films using cold plasma processes

Thiry

Chauvin

Mel

et al. 2017

Plasma Process Polym

View full text Add to dashboard Cite

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“…This structure can be compared to N ‐heptylamine plasma polymers, which have been shown to form porous microstructures upon solvent exposure; an effect attributed to loss of low molecular weigth materials . Furthermore, the presence of interconnected pores has also been documented within dry amino‐containing hydrocarbon plasma polymers, which allowed bulky dye molecules to penetrate the film …”

Section: Resultsmentioning

confidence: 99%

In situ monitoring of the effect of ionic strength and pH on plasma polymer thin films

Knobloch

Askew

Jarvis

et al. 2017

Plasma Process Polym

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The effect of ionic strength and pH on the structure of hydrated plasma polymerized films of allylamine (ppAAm) and acrylic acid (ppAAc) has been analyzed in situ using quartz crystal microbalance with dissipation techniques, electrochemical impedance spectroscopy, ellipsomtery, and X-ray photoelectron spectroscopy. Both materials showed a salt concentration and pH dependent uptake and release of water and ions. Depending on the type of monomer used, the effects showed reversible or non-reversible behavior. The investigation of the electrochemical properties of the film further revealed a non-homogeneous structure, especially in the case of ppAAc films, with regions of higher and lower cross-linking density. The use of complimentary techniques to characterize the films in situ allowed for a deeper understanding of processes happening inside the plasma polymerized films, which can help to optimize film preparation conditions for selected applications.

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“…Truica‐Marasescu et al explained that low power input and pressure conditions during synthesis led to poorly cross‐linked plasma polymers that are soluble in polar solvents such as water . Hydrolysis reactions that convert imines and amines into hydroxides, carboxylic acid, and carbonyls could be responsible for the degradation of the plasma polymer coating . As for sample MWCNT‐20:0, although its nitrogen functional groups are directly grafted to the MWCNTs, the same hydrolysis reactions could be responsible for the observed loss in nitrogen.…”

Section: Resultsmentioning

confidence: 99%

Nanofluids Containing MWCNTs Coated with Nitrogen-Rich Plasma Polymer Films for CO₂ Absorption in Aqueous Medium

Jorge

Coulombe

Girard‐Lauriault

2015

Plasma Process. Polym.

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Amine-functionalized multi-walled carbon nanotubes (MWCNTs) dispersed in water are investigated as CO 2 absorbents. MWCNTs grown by chemical vapor deposition on stainless steel meshes form open forests that can be coated via a RF capacitively coupled glow discharge. When treating the MWCNTs in an atmosphere containing either pure ammonia or mixtures of ammonia and ethylene for 5 min, grafting of nitrogen functional groups or deposition of a nitrogen-rich plasma polymer layer occurs. In particular, for a 1:1 mixture, a 10 nm thick plasma polymer layer coats the MWCNTs. This layer contains about 19 N at%, and 12% of these nitrogen atoms are nucleophilic sites (such as amines) that may react with CO 2 . These functional groups not only enhance the absorption of CO 2 , but also increase the hydrophilic character of the MWCNTs, allowing them to stay suspended in water for at least three months at room temperature. The CO 2 absorption capacity of this nanofluid is 36% higher than that of water, with a MWCNT concentration of about 40 mg L À1 .

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Controlling the nanostructure and stability of a-C:H:N plasma polymers

Cited by 18 publications

References 44 publications

Tailoring the chemistry and the nano-architecture of organic thin films using cold plasma processes

Tailoring the chemistry and the nano-architecture of organic thin films using cold plasma processes

In situ monitoring of the effect of ionic strength and pH on plasma polymer thin films

Nanofluids Containing MWCNTs Coated with Nitrogen-Rich Plasma Polymer Films for CO₂ Absorption in Aqueous Medium

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Controlling the nanostructure and stability of a-C:H:N plasma polymers

Cited by 18 publications

References 44 publications

Tailoring the chemistry and the nano-architecture of organic thin films using cold plasma processes

Tailoring the chemistry and the nano-architecture of organic thin films using cold plasma processes

In situ monitoring of the effect of ionic strength and pH on plasma polymer thin films

Nanofluids Containing MWCNTs Coated with Nitrogen-Rich Plasma Polymer Films for CO2 Absorption in Aqueous Medium

Contact Info

Product

Resources

About

Nanofluids Containing MWCNTs Coated with Nitrogen-Rich Plasma Polymer Films for CO₂ Absorption in Aqueous Medium