RF-power-controlled young's modulus of plasma-polymerized organosilicon films

Čech, Vladimír; Vanek, J.; Goruppa, A.; Jones, Frank R.

doi:10.1007/s10853-005-1672-x

Cited by 17 publications

(16 citation statements)

References 13 publications

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“…The Poisson's ratio, ν , used in Equation (2) for all pp‐TVS films was 0.5. Generally speaking, the plotted data indicate that the Young's modulus and hardness increased with enhanced power as expected 16. Monomer molecules are more activated and fragmented forming a higher density of free radicals if the plasma energy (power) increases, and the reactive species result in a highly cross‐linked polymer.…”

Section: Resultssupporting

confidence: 63%

Mechanical Properties of Plasma‐Polymerized Tetravinylsilane Films

Čech

Hosein

Lasota

et al. 2011

Plasma Processes & Polymers

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Continuous stiffness measurement (CSM) and dynamic contact module (DCM) nanoindentation measurements were used to characterize the mechanical properties of plasma‐polymerized tetravinylsilane films deposited by PECVD at RF powers ranging from 10 to 70 W. The Young's modulus and hardness as a function of the indenter displacement (5–500 nm) were investigated for films of 1‐µm thickness. The Young's modulus (hardness) was observed to increase from 8.3 (0.9 GPa) to 58 GPa (9.5 GPa) with enhanced RF power. Nanoindentation analysis together with AFM imaging revealed a grain character of films deposited at a higher power. Finite element analysis was used to simulate nanoindentation measurements and evaluate properties of the elastic–plastic material.

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Section: Resultssupporting

confidence: 63%

Mechanical Properties of Plasma‐Polymerized Tetravinylsilane Films

Čech

Hosein

Lasota

et al. 2011

Plasma Processes & Polymers

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“…It is now well established that cells sense the mechanical stiffness of both the ECM and the neighboring cells, and, in some cases, vary their phenotypes 42, 43. In regard to the mechanical properties of plasma polymers, recent studies have shown that plasma polymer films become softer as the peak power input is decreased 44, 45. For example, film hardness has been shown to vary from 1.7 to 3.3 GPa with increasing plasma duty cycle 44, 45.…”

Section: Discussionmentioning

confidence: 99%

“…42,43 In regard to the mechanical properties of plasma polymers, recent studies have shown that plasma polymer films become softer as the peak power input is decreased. 44,45 For example, film hardness has been shown to vary from 1.7 to 3.3 GPa with increasing plasma duty cycle. 44,45 Additionally, increased film softness has been observed for thicker films deposited at the same average power inputs.…”

Section: Discussionmentioning

confidence: 99%

Surface chemistry and polymer film thickness effects on endothelial cell adhesion and proliferation

Bhattacharyya

Deshmukh

et al. 2010

J Biomedical Materials Res

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Adherence and growth rates of human aortic endothelial cells (HAEC) on plasma polymerized poly (vinylacetic acid) films were measured as functions of the surface density of -COOH groups and plasma deposited film thickness. Pulsed plasma polymerization was employed to produce films containing 3.6 to 9% -COOH groups, expressed as a percent of total carbon content. Endothelial cells exhibited increased cell adherence and proliferation with increasing -COOH surface densities. Additionally, and unexpectedly, cell growth was also dependent on the film thicknesses, which ranged from 25 to 200 nm. The results indicate that optimization of the functional group surface density and film thickness could produce significant enhancements in initial adhesion and subsequent growth of the HAEC cells.

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“…Hydrogenated amorphous carbon (a-C:H) was prepared with a slightly lower modulus in the range of 40-145 GPa [14] using a CH 4 precursor and likewise with a modulus in the range of 41-142 GPa [16] using a C 2 H 2 precursor. Hydrogenated amorphous silicon oxycarbide (a-SiOC:H) was deposited from SiC 4 H 12 as a stiff material (with a modulus in the range of 130-160 GPa [17]) or soft material (with a modulus in the range of 2-11 GPa) using SiO 3 C 8 H 18 (VTES) [3], or from a monomer mixture with oxygen gases Si 2 OC 6 H 18 /O 2 [18] and (Fig. 4).…”

Section: Resultsmentioning

confidence: 99%

“…The formation of a strong bond at the interface is possible using a gentle plasma treatment of the fiber surface. Thus, the enhanced surface roughness and wettability, together with new functional groups, result in high interfacial shear strength, while the mechanical properties of the fiber are retained (see the review in [3]). However, an increase in the shear strength is inevitably accompanied by a loss in the impact fracture toughness, which results in the composite material being too brittle to be applicable.…”

Section: Interlayer As a Functional Nanostructurementioning

confidence: 99%

Plasma Polymer Film as a Model Interlayer for Polymer Composites

Čech

2006

IEEE Trans. Plasma Sci.

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In this paper, a plasma-enhanced chemical vapor deposition process that is useful for the preparation of thin and ultrathin films of controlled mechanical properties is identified. Plasma-polymerized films of vinyltriethoxysilane were deposited on planar substrates and analyzed using nanoindentation measurements of the Young's modulus of the films, adhesion bonding at the film/glass interface, chemical composition, and structure. The modulus of the plasma polymer film can be controlled simply by the effective power fed into the capacitive-coupled low-pressure plasma. The single film was tested as an interlayer in glass fiber (GF)/polyester composites. GF bundles were surface modified by plasma polymer in a unique technological system, enabling continuous processing of the bundle. GF/polyester composites in the form of short beams were manufactured using the coated fibers and tested according to the standard test method. By increasing the interlayer modulus, the short-beam strength was enhanced up to 112% compared with the untreated GFs, and this enhancement was also supported by an improvement in interfacial bonding. Index Terms-Glass fiber (GF), interface/interphase, mechanical properties, plasma-enhanced chemical vapor deposition (PE CVD), thin film.

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RF-power-controlled young's modulus of plasma-polymerized organosilicon films

Cited by 17 publications

References 13 publications

Mechanical Properties of Plasma‐Polymerized Tetravinylsilane Films

Mechanical Properties of Plasma‐Polymerized Tetravinylsilane Films

Surface chemistry and polymer film thickness effects on endothelial cell adhesion and proliferation

Plasma Polymer Film as a Model Interlayer for Polymer Composites

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