Nano-embossed structure on polypropylene induced by low energy Ar ion beam irradiation

Ahmed, Sk. Faruque; Rho, Geon-Ho; Lee, Jiyeong; Kim, Seong‐Jin; Kim, Ho-Young; Jang, Yong-Jun; Moon, Myoung‐Woon; Lee, Kwang-Ryeol

doi:10.1016/j.surfcoat.2010.06.005

Cited by 15 publications

(5 citation statements)

References 22 publications

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“…In recent years, the evolution of surface stresses in various solids caused by bombardment of low-energy (0.5-2 keV) noble-gas ions has been actively investigated, aiming at applications of stress engineering at the nanoscale (Wirth 2007). For such applications, ion bombardments are often used to generate surface stresses of a few newtons per metre, which in turn control the stability of self-assembled surface nanostructures Ahmed et al 2010). When ion bombardment is carried out on an ultra-thin metallic film of approximately 10 nm thickness attached to a soft stretchable substrate, the induced stresses produce localized wrinkles of the film; these wrinkled patterns have potential applications in flexible electronics, making nanoparticle filters and variable optical gratings and adhesion, wetting and friction control of soft and/or bio material surfaces (Genzer & Groenewold 2006;Rahmawan et al 2010;Sun et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Nanoscale mechanisms of surface stress and morphology evolution in FCC metals under noble-gas ion bombardments

Kim

Chew²,

Chason

et al. 2012

Proc. R. Soc. A.

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Here, we uncover three new nanoplasticity mechanisms, operating in highly stressed interstitial-rich regions in face-centred-cubic (FCC) metals, which are particularly important in understanding evolution of surface stress and morphology of a FCC metal under low-energy noble-gas ion bombardments. The first mechanism is the configurational motion of self-interstitials in subsonic scattering during ion bombardments. We have derived a stability criterion of self-interstitial scattering during ion embedding, which consistently predicts the possibility of vacancy-and interstitial-rich double-layer formation for various ion bombardments. The second mechanism is the growth by gliding of prismatic dislocation loops (PDLs) in a highly stressed interstitial-rich zone. This mechanism allows certain prismatic dislocations with their Burgers vectors parallel to the surface to grow in subway-glide mode (SGM) during ion bombardment. The SGM growth creates a large population of nanometre-sized prismatic dislocations beneath the surface. The third mechanism is the Burgers vector switching of a PDL that leads to unstable eruption of adatom islands during certain ion bombardments of FCC metals. We have also derived the driving force and kinetics for the growth by gliding of prismatic dislocations in an interstitial-rich environment as well as the criterion for Burgers vector switching, which consistently clarifies previously unexplainable experimental observations.

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Section: Introductionmentioning

confidence: 99%

Nanoscale mechanisms of surface stress and morphology evolution in FCC metals under noble-gas ion bombardments

Kim

Chew²,

Chason

et al. 2012

Proc. R. Soc. A.

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“…The broad features observed in Raman spectra have been observed previously in polymers [59][60][61], and these features are indicators of disorder in the PDMS semi-crystalline structure induced by ion implantation. In particular, the peak at about 1400 cm −1 which represents the bending vibration of the (CH 2 ) bond became broader at higher ion fluence, suggesting disordered carbon material and the formation of sp 2 and sp 3 hybridized mixture by the amorphous carbon in the CH 2 group [62,63]. This further confirms that the side chains in the PDMS were either cross-linked into both saturated and unsaturated chemical bonds or carbonized due to hydrogen loss.…”

Section: Raman Spectroscopymentioning

confidence: 62%

Modulating surface stiffness of polydimethylsiloxane (PDMS) with kiloelectronvolt ion patterning

Liu¹,

Fu²

2015

J. Micromech. Microeng.

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This study is to investigate the modulated surface properties of polydimethylsiloxane (PDMS) with kiloelectronvolt ions. By irradiating the PDMS surface with a focused ion beam (FIB, keV Ga+), nano/microscale patterns of controlled stiffness can be fabricated with ion fluence ranging from 0.1–20 pC µm−2. The following nanoindentation measurements with an atomic force microscope (AFM) revealed that Young’s modulus increased exponentially with the increase of ion fluence and reached 2 GPa. The stiffening was found to be less significant with irradiation at a higher ion incident angle and lower accelerating voltage. Raman spectroscopy results also confirmed that disordering caused by cross-linking and hydrogen release occurred on the target PDMS surface. By modelling and experimenting on PDMS-Si3N4 bilayer structures, the volume reduction ratios of PDMS with ion beam and electron beam irradiation were estimated. The proposed site specific modulating method and understanding of detailed governing mechanisms will allow the tuning of the PDMS surface with great accuracy and flexibility towards future applications in tissue engineering and microfabrication.

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“…Higher R A values were reported for Ar plasma-modified membranes. In study [ 49 ], it has been shown that though different gases exhibit different etching rates of polymers, Ar is more powerful in roughening the surface through physical etching under strong ion bombardment. However, it has been found that the plasma treatment process led to modification only of the membrane surfaces.…”

Section: Resultsmentioning

confidence: 99%

Stability of Ar/O2 Plasma-Treated Polypropylene Membranes Applied for Membrane Distillation

Gryta

Tomczak

2021

Membranes

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In the present work, Ar/O2 plasma treatment was used as a surface modification tool for polypropylene (PP) membranes. The effect of the plasma conditions on the properties of the modified PP surface has been investigated. For this purpose, the influence of gas composition and its flow rate, plasma power excitation as well as treatment time on the contact angle of PP membranes has been investigated. The properties of used membranes were determined after various periods of time: immediately after the modification process as well as after one, four and five years of storage. Moreover, the used membranes were evaluated in terms of their performance in long-term MD process. Through detailed studies, we demonstrated that the performed plasma treatment process effectively enhanced the performance of the modified membranes. In addition, it was shown that the surface modification did not affect the degradation of the membrane matrix. Indeed, the used membranes maintained stable process properties throughout the studied period.

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Nano-embossed structure on polypropylene induced by low energy Ar ion beam irradiation

Cited by 15 publications

References 22 publications

Nanoscale mechanisms of surface stress and morphology evolution in FCC metals under noble-gas ion bombardments

Nanoscale mechanisms of surface stress and morphology evolution in FCC metals under noble-gas ion bombardments

Modulating surface stiffness of polydimethylsiloxane (PDMS) with kiloelectronvolt ion patterning

Stability of Ar/O2 Plasma-Treated Polypropylene Membranes Applied for Membrane Distillation

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