Argon plasma treatment of polystyrene microtiter wells. Chemical and physical characterisation by contact angle, ToF-SIMS, XPS and STM

Davies, John A.; Nunnerley, Caroline S.; Brisley, Anneli C.; Sunderland, R.F.; Edwards, John C.; Krüger, Per; Knes, R.; Paul, A. J.; Hibbert, S.

doi:10.1016/s0927-7757(00)00497-0

Cited by 55 publications

(31 citation statements)

References 16 publications

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“…9 The approach we took was hydrophilization of the surface. Hydrophilization can, for example, be achieved by plasma treatment, [10][11][12] or coating with inorganic (TiO 2 , ZnO) [13][14][15] or organic substances (hydrophilic polymers). 16,17 One feature of a hydrophilic surface is a low contact angle of water (<90°).…”

Section: Introductionmentioning

confidence: 99%

A moisture-absorbing and abrasion-resistant transparent coating on polystyrene

2015

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A common phenomenon concerning cold surfaces which are subjected to a warmer, more humid atmosphere is condensation in the form of water droplets (fogging) or even ice crystals (icing). Thus, a previously transparent object becomes opaque because light is scattered by the droplets or crystals. This may impair the usability of that object. We developed an anti-fogging/icing coating which overcomes the problem of fogging and icing by being able to absorb the condensing water and preventing it from crystallizing. The coating consists of poly(1-vinyl-2-pyrrolidone) (PVP) crosslinked by UV light using hydrogen peroxide (H 2 O 2 ). Benzophenone (BP) is used to attach PVP to the surface of the polystyrene (PS) substrate. At temperatures as low as À60°C, the PVP coating can absorb up to 70 wt% of water and still inhibit its crystallization. However, at surface temperatures of around À18°C, opacity is only observable at 150 wt% of absorbed water and higher. An increasing coating thickness as well as a decreasing crosslink density improves the anti-fogging/icing effect because the coating can absorb more water. The abrasion resistance of the coating is impaired by a decreasing crosslink density.

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Section: Introductionmentioning

confidence: 99%

A moisture-absorbing and abrasion-resistant transparent coating on polystyrene

2015

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“…This non polluting technique allows to contribute to some surface modifications such as the increase of wettability [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] .…”

Section: Introductionmentioning

confidence: 99%

“…At last the very low energy cost of this recent treatment method is remarkable 11 : the duration of the discharge corresponding to one DC pulse is one hundred times lower than the 3 time period between two DC pulses. As a consequence polymer samples are mainly exposed to a "temporal afterglow" which underscores the important role of long-lived reactive species generated in the plasma 12 .…”

Section: Introductionmentioning

confidence: 99%

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Analysis of microscopic modifications and macroscopic surface properties of polystyrene thin films treated under d.c. pulsed discharge conditions

Larrieu

Clément

Held

et al. 2005

Surf. Interface Anal.

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Using a DC pulsed plasma for the polymer surface treatment allows the attainment of macroscopic modifications of the surface such as an important increase of the wettability. In the same time microscopic variations of the surface structure are mainly linked to low depth chemical modifications even if very weak roughness changes appear.As a consequence this technique presents two major interests. The first one is an economical interest because of the low power consumption compared to other techniques like radiofrequency or microwaves plasmas. The second one is the very significant treatment (macroscopic) realized in soft conditions without degradation of the polymer.These results composed of macroscopic and microscopic studies on polystyrene surfaces may allow to establish a macroscopic interpretation of the interaction between polymer and the DC pulsed plasma.

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“…In a recent study, the effect of argon plasma treatment on the chemical and physical properties of microtiter well surfaces was analyzed using contact angle measurements, time-of-flight secondary ion mass spectrometry (ToF-SIMS), and X-ray photoelectron spectroscopy (XPS) (30). Argon plasma treatment was found to first clean the surface of volatile contaminants and then to introduce oxygen functionality into the surface.…”

Section: Introductionmentioning

confidence: 99%