Polymer masks for structured surface and plasma etching

Vital, Alexane; Vayer, Marylène; Sinturel, Christophe; Tillocher, Thomas; Lefaucheux, Philippe; Dussart, Rémi

doi:10.1016/j.apsusc.2015.01.040

Cited by 17 publications

(11 citation statements)

References 64 publications

(78 reference statements)

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“…The 3D Hirox Microscopy images can be interpreted as HNO 3 etches the surface of mPE, and one hour acid treatment must have etched the mPE surface more than the 30 min treated sample, thereby resulting in mPE with more pits and pores with higher depth compared to the control. These observations can be compared to a later work of ( Vital et al, 2015 ) where the amplitude of depressions formed in the surface of polymer increased after tetrahydrofuran (THF) and acetic acid surface treatment whereas thickness of the polymer film remained unchanged. Hence, the etching effect of the acid has a favorable impact on the final surface wettability of the polymer, thereby making it more hydrophilic similar to the other surface treatments like plasma treatment to make it blood compatible for various blood contacting device applications ( Yue et al, 2015 ).…”

Section: Discussionmentioning

confidence: 59%

Unravelling the potential of nitric acid as a surface modifier for improving the hemocompatibility of metallocene polyethylene for blood contacting devices

Vellayappan

Jaganathan

Muhamad

2016

PeerJ

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Design of blood compatible surfaces is obligatory to minimize platelet surface interactions and improve the thromboresistance of foreign surfaces when they are utilized as biomaterials particularly for blood contacting devices. Pure metallocene polyethylene (mPE) and nitric acid (HNO3) treated mPE antithrombogenicity and hydrophilicity were investigated. The contact angle of the mPE treated with HNO3 decreased. Surface of mPE and HNO3 treated mPE investigated with FTIR revealed no major changes in its functional groups. 3D Hirox digital microscopy, SEM and AFM images show increased porosity and surface roughness. Blood coagulation assays prothrombin time (PT) and activated partial thromboplastin time (APTT) were delayed significantly (P < 0.05) for HNO3 treated mPE. Hemolysis assay and platelet adhesion of the treated surface resulted in the lysis of red blood cells and platelet adherence, respectively indicating improved hemocompatibility of HNO3 treated mPE. To determine that HNO3 does not deteriorate elastic modulus of mPE, the elastic modulus of mPE and HNO3 treated mPE was compared and the result shows no significant difference. Hence, the overall observation suggests that the novel HNO3 treated mPE may hold great promises to be exploited for blood contacting devices like grafts, catheters, and etc.

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Section: Discussionmentioning

confidence: 59%

Unravelling the potential of nitric acid as a surface modifier for improving the hemocompatibility of metallocene polyethylene for blood contacting devices

Vellayappan

Jaganathan

Muhamad

2016

PeerJ

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“…During dip-coating, various phenomena are also superposed such as wetting/dewetting, phase separation, solvent evaporation, capillary flow, and viscous drag. As demonstrated by Vital et al 82 and illustrated in Fig. 3, the final morphology depends on many experimental parameters such as withdrawal speed, polymer blend composition, and solvent nature.…”

Section: Phenomena In Thin Polymer Filmsmentioning

confidence: 84%

A decade of innovation and progress in understanding the morphology and structure of heterogeneous polymers in rigid confinement

Vayer

Sinturel

2021

Soft Matter

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“…Although a notable variation in uniformity was observed, we suggest that this may be improved upon via co-casting the BCP with a PS homopolymer onto a PS brush substrate. 33,59,60 Dynamic WVA could also be used to promote pattern uniformity across the film. 21 Nevertheless, the method we employed in this work is a very attractive route to generate a relatively close-packed toroidal micelle array on the substrate.…”

Section: ■ Conclusionmentioning

confidence: 99%

Large-Area Fabrication of Vertical Silicon Nanotube Arrays via Toroidal Micelle Self-Assembly

et al. 2021

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We present a highly scalable, room-temperature strategy for fabricating vertical silicon nanotube arrays derived from a toroidal micelle pattern via a water vapor-induced block copolymer (BCP) self-assembly mechanism. A polystyrene-b-poly(ethylene oxide) (PS-b-PEO) BCP system can be self-assembled into toroidal micelle structures (diameter: 400−600 nm) on a PS-OH-modified substrate in a facile manner contrasting with other complex processes described in the literature. It was found that a minimum PS-b-PEO thickness of ∼86 nm is required for the toroidal self-assembly. Furthermore, a water vapor annealing treatment at room conditions (∼25 °C, 60 min) is shown to vastly enhance the ordering of micellar structures. A liquid-phase infiltration process was used to generate arrays of iron and nickel oxide nanorings. These oxide structures were used as templates for pattern transfer into the underlying silicon substrate via plasma etching, resulting in large-area 3D silicon nanotube arrays. The overall simplicity of this technique, as well as the wide potential versatility of the resulting metal structures, proves that such room-temperature synthesis routes are a viable pathway for complex nanostructure fabrication, with potential applicability in fields such as optics or catalysis.

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Polymer masks for structured surface and plasma etching

Cited by 17 publications

References 64 publications

Unravelling the potential of nitric acid as a surface modifier for improving the hemocompatibility of metallocene polyethylene for blood contacting devices

Unravelling the potential of nitric acid as a surface modifier for improving the hemocompatibility of metallocene polyethylene for blood contacting devices

A decade of innovation and progress in understanding the morphology and structure of heterogeneous polymers in rigid confinement

Large-Area Fabrication of Vertical Silicon Nanotube Arrays via Toroidal Micelle Self-Assembly

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