Annealing‐promoted unidirectional migration of organic‐modified nanoparticles embedded two‐dimensionally in polymer thin films

Liu, Yang; Kato, Takumi; Kubo, Masaki; Sugioka, Ken Ichi; Tsukada, Takao; Takami, Seiichi; Adschiri, Tadafumi

doi:10.1002/app.42760

Cited by 14 publications

(3 citation statements)

References 35 publications

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“…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.

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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.

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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.

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“…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

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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.

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“…Studying the influence of annealing on crystalline polymer films is undoubtedly important to modify the film properties such as surface roughness. Indeed, there are several works that report the influence of annealing on the surface morphology of single‐polymer films, bilayer‐polymer films, conducting‐polymer films, and polymer films with some inclusions such as C 60 and nanoparticles, and on the structure and deformation mechanism of isotactic polypropylene films with row‐nucleated lamellar structure . Surface morphology of natural rubber and PMMA blend has also been studied in terms of the effects of PMMA particle size and annealing .…”

Section: Introductionmentioning

confidence: 99%

Morphological change of crystalline polymer films by annealing: substrate‐ and heating/cooling‐rate‐dependent surface roughness

Uto

Mizobata

Maurya

et al. 2017

Surface & Interface Analysis

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We study the morphological change of crystalline polymer films by annealing using atomic force microscope, X-ray diffraction, and Fourier transform infrared spectroscopy techniques. As typical samples, we employ high-density and low-density polyethylene films prepared by the cast method. After annealing at 135°C for 4 h, the surface roughness of polyethylene films by the atomic force microscope significantly increases, and the crystallite size by the X-ray diffraction also shows some increase, while the Fourier transform infrared spectroscopy spectrum hardly exhibits any change. This can be well explained as a result of the growth of crystal structure by recrystallization during annealing. More interestingly, we find that the choice of the substrate and also the heating/cooling rates for annealing significantly influences the surface roughness of the films.

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Annealing‐promoted unidirectional migration of organic‐modified nanoparticles embedded two‐dimensionally in polymer thin films

Cited by 14 publications

References 35 publications

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

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

Morphological change of crystalline polymer films by annealing: substrate‐ and heating/cooling‐rate‐dependent surface roughness

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