Analysis of plasma-induced morphological changes in sputtered thin films over compliant elastomer

Maji, Debashis; Das, Soumen

doi:10.1088/0022-3727/47/10/105401

Cited by 21 publications

(23 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The resistance of the 15 nm G‐aC film to the dimensional changes of the soft substratum resulted in its delamination and cracking. This observation was consistent with previously reported studies of nichrome on polydimethylsiloxane substrata and palladium on polystyrene substrata …”

Section: Resultssupporting

confidence: 94%

Influence of Amorphous, Carbon‐Derived Wrinkled Surface Topologies on the Colonization of Pseudomonas aeruginosa Bacteria

Nguyen

Wang

Sbarski

et al. 2019

Adv Materials Inter

View full text Add to dashboard Cite

Surface wrinkling is a natural phenomenon that has inspired an emerging technology in surface patterning. Here, it is demonstrated that thermal treatment planar thin films of amorphous graphite‐like carbon (G‐aC) coatings deposited on shape memory polystyrene could be used to prepare substratum surfaces with topologies ranging from smooth undulations to those with rough distortion features. A comparative analysis of the attachment propensity of Pseudomonas aeruginosa ATCC 9721 and alginate‐overproducing P. aeruginosa PW2390 bacterial cells, together with the associated production of extracellular polymeric substances (EPS), reveal that at least a 13‐fold increase in the cell attachment density could be achieved, reaching up to 1.3 × 105 and 1.8 × 105 cells mm−2 being attached to the surface for both bacterial strains on G‐aC wrinkled surfaces. The P. aeruginosa PW2390 cells attached to a greater extent than the P. aeruginosa ATCC 9721 cells (≈45%) and without any increased production of EPS material. It is suggested that the increased level of cell attachment is related to the associated substantial increase in available substratum surface area. The results of this study afford a useful insight toward the production of substrata using a straightforward, tunable, and low cost microfabrication approach.

show abstract

Section: Resultssupporting

confidence: 94%

Influence of Amorphous, Carbon‐Derived Wrinkled Surface Topologies on the Colonization of Pseudomonas aeruginosa Bacteria

Nguyen

Wang

Sbarski

et al. 2019

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…1c . Indeed, it is well known that the deposition of thin metal films onto the surface of PDMS can result in cracking of the metal 56 62 and, indeed, cracking of the PDMS surface 63 , as can thermal cycling 64 . Figure 1d shows the mud-crack patterning of the PDMS surface as a result of the process presented here for large surface metallization – as we will see, the mud-crack pattern density can be controlled via the plasma dose and the metallization thickness.…”

Section: Resultsmentioning

confidence: 99%

Controlled mud-crack patterning and self-organized cracking of polydimethylsiloxane elastomer surfaces

Seghir¹,

Arscott²

2015

Sci Rep

View full text Add to dashboard Cite

Exploiting pattern formation – such as that observed in nature – in the context of micro/nanotechnology could have great benefits if coupled with the traditional top-down lithographic approach. Here, we demonstrate an original and simple method to produce unique, localized and controllable self-organised patterns on elastomeric films. A thin, brittle silica-like crust is formed on the surface of polydimethylsiloxane (PDMS) using oxygen plasma. This crust is subsequently cracked via the deposition of a thin metal film – having residual tensile stress. The density of the mud-crack patterns depends on the plasma dose and on the metal thickness. The mud-crack patterning can be controlled depending on the thickness and shape of the metallization – ultimately leading to regularly spaced cracks and/or metal mesa structures. Such patterning of the cracks indicates a level of self-organization in the structuring and layout of the features – arrived at simply by imposing metallization boundaries in proximity to each other, separated by a distance of the order of the critical dimension of the pattern size apparent in the large surface mud-crack patterns.

show abstract

“…COF measurements were performed at 0.02, 0.05, and 0.1 N loads. Assuming elastic Hertzian deformation, and using reported values of 210 GPa and 0.3 for Young's modulus and Poisson's ratio, respectively, for both ball and plate materials [25,26] The XRD results for the three NiCr samples are shown in Fig. 2.…”

Section: Methodsmentioning

confidence: 99%

Increasing the coefficient of sliding friction of NiCr at low loads by interstitial surface hardening

Kahn

Ernst

Heuer

2016

Wear

View full text Add to dashboard Cite

NiCr alloys are of technical interest for vibrational damping structures operating at hightemperature (> 1000 C) [1]. For this purpose, woven wire meshes have been developed that consist of NiCr alloy (Ni-20Cr) wires. The inter-wire forces in these structures are estimated to be about 0.05 N [2]. Increasing the coefficient of sliding friction (COF) between the wires at these loads would improve the damping behavior. It has been reported that hardening metal alloys without changing the composition decreases COF. For example, implanting martensitic steel with carbon or nitrogen increases hardness by about two times and reduces the COF (in air) by a factor of 8 [3]. Work hardening of an aluminum alloy doubles the hardness and decreases the COF from 1.4 to 0.9 [4]. Annealing a CuZrAl bulk metallic glass raises the hardness from 480 HV to 530 HV and reduces the COF from 0.5 to 0.4 [5].

show abstract

Analysis of plasma-induced morphological changes in sputtered thin films over compliant elastomer

Cited by 21 publications

References 58 publications

Influence of Amorphous, Carbon‐Derived Wrinkled Surface Topologies on the Colonization of Pseudomonas aeruginosa Bacteria

Influence of Amorphous, Carbon‐Derived Wrinkled Surface Topologies on the Colonization of Pseudomonas aeruginosa Bacteria

Controlled mud-crack patterning and self-organized cracking of polydimethylsiloxane elastomer surfaces

Increasing the coefficient of sliding friction of NiCr at low loads by interstitial surface hardening

Contact Info

Product

Resources

About