Enhancing the stability of polystyrene ultrathin films by using star-shape polymers as dewetting inhibitors

Pangpaiboon, Nampueng; Traiphol, Rakchart; Traiphol, Nisanart

doi:10.1007/s11998-015-9715-y

Cited by 6 publications

(5 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All thin films were prepared by spin coating. The solutions provided film thicknesses about 23 nm (Pangpaiboon et al, 2015). The spinning rate was kept constant at 1000 rpm for 10 s. Three samples were prepared for each condition.…”

Section: Methodsmentioning

confidence: 99%

Thermal stability of zinc oxide - polystyrene composite thin film

Wongtrakul¹,

Watchana²,

Pangpaiboon³

2017

j.appsci

Self Cite

View full text Add to dashboard Cite

Thin polymer films need to be stable on solid substrates while processing application to preserve their properties. Increasing temperature causes polymer thin films lost their stability. From classical knowledge, the existence of impurity in polymer thin film usually induces dewetting behavior. However, addition of small amount of nano-fillers enhanced thermal stability of polymer thin film. In this research, thermal stability of composite film was investigated by adding zinc oxide nanoparticle into polystyrene thin film. The concentrations of zinc oxide nanoparticles were 0, 0.1, 0.2, 0.5 and 1.0 wt% in polystyrene (MW = 35,000 g/mol). After annealing the composite films at 90 °C for various times, the film morphology was studied by using optical microscope. Contact angle and surface energy of films were calculated by using contact angle measurement. Dewetting area was observed and considered to compare the percentages of each samples. From these results, we found that addition of zinc oxide nanoparticles can retard dewetting behavior of polystyrene film and increasing amount of nanoparticles increases thermal stability of composite films. Keywords: dewetting, nanoparticles, thin film IntroductionPolymer thin film is a famous material used in various technological applications such as dielectric coatings, optical coatings, lithography resisting, electronic packaging, and surfaces lubricating because of a remarkable insulation property of polymer. The thin film need to be stable on the substrate in technology application. However, because of the difference of chemical structure between polymer film and metal oxide substrate, polymer film trend to separate from the substrate which is called dewetting behavior. The first step of dewetting process, early stage, occurs when small holes are created. Subsequently, the small holes are expanded and merged which each others showing ribbon structure, intermediated state. Finally, ribbon structure is disconnected and the film presents a number of droplets which is called completely dewet.Many researches have been investigated how to retard dewetting action of polymer thin films, for example, modification of polymeric structure and/or substrate surface (Henn et al

show abstract

Section: Methodsmentioning

confidence: 99%

Thermal stability of zinc oxide - polystyrene composite thin film

Wongtrakul¹,

Watchana²,

Pangpaiboon³

2017

j.appsci

Self Cite

View full text Add to dashboard Cite

show abstract

“…This thermal breakdown is known as thermal dewetting [2][3][4][5][6][7]. The incorporation of nanoparticles into polymer matrix is considered as a potential solution due in part to the physical interaction between the polymer and the embedded nano-additives which helps reduce polymer chain dynamics, and thereby enhancing film stability [8][9][10][11][12]. Various nanoparticles have been discovered to be effective dewetting inhibitors, and examples include silver (Ag) [4], titanium dioxide (TiO2) [13], and zinc oxide (ZnO) [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Dewetting Behavior of PS-ZnO Thin Film Coated on Ultrathin Au Layer Grown on Si Substrate

Pangpaiboon

Kotpech

Ketkaew

et al. 2023

Curr. Appl. Sci. Technol.

View full text Add to dashboard Cite

Electronic packaging by coating device component surfaces with polymer thin film is an important step to protect the components from harsh environments. However, along with the device miniaturization to improve its performance, scaling down the coating film can cause a decrease in film durability. Therefore, the thermal stability of pure polystyrene (PS) and zinc oxide-incorporated polystyrene (PS-ZnO) nano-thin films coated on gold (Au) layer with different nano thicknesses on Si substrate were examined to determine the smallest Au thickness at which the polymer films would exhibit optimal stability, and to investigate the effects of the Au component on film resistance to thermal dewetting. With the requirement of having a transparent and conductive Au electrode, the thickness of 20 nm was identified as the optimal value for the Au layer on which both the PS and PS-ZnO films could withstand environment temperatures at 150oC for up to a few hours while the PS-ZnO film exhibited outstanding thermal stability for over 10 days. Such excellent durability was ascribed to the physio-chemical framework in which the coating film can experience forces from the coated layers which potentially affect the mobility of polymer chains. Considering the increase of Au content and Au film roughness with increasing Au film thickness and realizing the similar surface adhesion forces of these Au layers, several possible influences of the Au material on the stability of PS matrix were discussed. The findings provide an insight into heat-resistant coatings for nano-thin Au layers grown on Si, which may also be of benefit in the design and understanding of relevant electronic protection and functional polymeric coatings.

show abstract

“…There are 3 common methods to inhibit dewetting: interface modification [9][10][11], polymer modification [12], and polymer cross-linking [13][14]. In the last decade, the new simple method to prevent dewetting behavior occurs, addition of nanoparticles [15][16][17][18][19]. Barnes et al [20] is the first investigator who found that addition small amount of C60 (fullerene) nanoparticles can suppress dewetting behavior.…”

Section: Introductionmentioning

confidence: 99%

Effect of polystyrene molecular weight and zinc oxide concentration on dewetting behavior of polymeric thin films

2020

View full text Add to dashboard Cite

The separation between ultra-thin polymer film on metal oxide substrate is called dewetting. Dewetting causes the polymer films to loss their stability and other important properties, for example, the films may short circuit or reduce their transparency. Therefore, the stability of polymer thin films on substrate need to be improved. Addition of nanoparticles is one of the most popular technique used to increase the stability of polymer thin films. The correlation between the different of molecular weight and ZnO concentration on dewetting behavior was studied in this research. The appropriate concentration of ZnO on dewetting suppression in each molecular weight was examined. Furthermore, the variation of dewetting pattern in each molecular weight system was analyzed. In this research, PS (13K and 30K) solutions mixed with ZnO suspension in toluene were prepared. The concentrations of ZnO in PS solution were 0-1.0 wt%. All composite thin films were coated by spin-casting technique and annealed at a temperature of 100Â°C in a vacuum oven to induce dewetting behavior. The topographies of annealed thin films were studied by using Optical microscope (OM) and Scanning electron microscope (SEM). The thicknesses of thin films were examined by Atomic force microscope (AFM). The surface energies of PS and PS-ZnO composite films were measured and calculated by using contact angle measurement. From the results, we found that addition of ZnO nanoparticles at concentrations 0.7 and 1.0 wt% are the optimum concentration for dewetting inhibition of PS13K and PS30K films, respectively.

show abstract

Enhancing the stability of polystyrene ultrathin films by using star-shape polymers as dewetting inhibitors

Cited by 6 publications

References 40 publications

Thermal stability of zinc oxide - polystyrene composite thin film

Thermal stability of zinc oxide - polystyrene composite thin film

Dewetting Behavior of PS-ZnO Thin Film Coated on Ultrathin Au Layer Grown on Si Substrate

Effect of polystyrene molecular weight and zinc oxide concentration on dewetting behavior of polymeric thin films

Contact Info

Product

Resources

About