Fabrication and characterization of pore-selective silver-functionalized honeycomb-patterned porous film and its application for antibacterial activity

Falak, Shahkar; Shin, Bo Kyoung; Yabu, Hiroshi; Huh, Do Sung

doi:10.1016/j.polymer.2022.124646

Cited by 10 publications

(9 citation statements)

References 63 publications

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“…In the case of S. aureus , no biofilm formation and no cell aggregates were observed in the HCP-SPANI film, as shown in Figure 9 d(iv). Additionally, the bacterial cells tended to migrate inside the pores of the HCP films, leaving the interpore surfaces free from cells [ 38 ]. The SEM images validate the results of the crystal violet biofilm assay shown in Figure 9 a,b.…”

Section: Resultsmentioning

confidence: 99%

“…The BF method is a simple and convenient method to fabricate highly ordered honeycomb-patterned (HCP) porous films with specific surface topography and chemical distribution, first reported by Widawski et al [ 37 ]. Many researchers have reported the antibacterial and antifouling activity of HCP films by incorporating antibacterial and antibiofilm moieties such as TiO 2 [ 24 ], silver NPs [ 38 , 39 ], silicone oil [ 40 ], etc. However, the antibacterial activity of PANI-coated HCP films has not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

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Antibacterial Activity of Polyaniline Coated in the Patterned Film Depending on the Surface Morphology and Acidic Dopant

2022

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We have fabricated poly(ε-caprolactone) (PCL) films with flat and honeycomb-patterned (HCP) structures to coat polyaniline (PANI) on the film surface. In addition, the effect of chemical modification of PANI by sulfuric acid (H2SO4) was also studied for antibacterial activity. The flat and HCP PCL films were obtained by simple evaporation of the solvent and via the breath figure (BF) method, respectively. The morphology and chemical composition of PANI coated on the film surface were evaluated by scanning electron microscopy (SEM) and X-ray spectroscopy (EDX). Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analyses (TGA) were obtained to identify the PANI coating. The wettability and conductivity of the films were also measured. Applicational aspects were evaluated by assessing antibacterial and antibiofilm activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The EDX, TGA, and FT-IR findings indicated chemical modification of PCL film by PANI and H2SO4. The conductivity of the films was increased by the coating of PANI to the patterned surface and additionally increased by the chemically modified PANI. The antibacterial activity was 69.79%, 78.27%, and 88% against E. coli, and 32.73%, 62.65%, and 87.97% against S. aureus, for flat PANI, HCP PANI, and H2SO4-treated HCP films, respectively. Likewise, the PANI coated flat, HCP, and H2SO4-treated HCP films inhibited E. coli biofilm formation by around 41.62%, 63%, and 83.88% and S. aureus biofilm formation by 17.81%, 69.83%, and 96.57%, respectively. The antibacterial activity of the HCP film was higher than that of flat PANI films, probably due to the higher coating of PANI on the HCP surface. Moreover, sulfonation of the HCP film with H2SO4 might have improved the wettability, thereby enhancing the antibacterial and antibiofilm properties. Our results showed that topographical changes, as well as doping, offer simple and cost-effective ways to modify the structural and functional properties of films.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of Polyaniline Coated in the Patterned Film Depending on the Surface Morphology and Acidic Dopant

2022

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“…The fabrication of pore-selective –COOH functionalized HCP films by the rBF method may have various applications, such as in controlled drug release [ 115 , 116 ] or biosensors [ 117 ], because the –COOH group functionalized at the pores can be further immobilized with various types of functional or smart materials containing hydroxyl or amine groups [ 112 , 118 ]. Recently, Falak et al fabricated HCP porous PS films with pore-selective Ag using the rBF method accompanied by an interfacial reaction, shown in Figure 20 [ 119 ]. In this study, an inorganic reactant AgNO 3 was added in the aq.…”

Section: Pore-selective Functionalization Of Hcp Filmsmentioning

confidence: 99%

“…On the other hand, ferrocene was included in the PS polymer solution as a reducing agent, which reduced AgNO 3 to Ag inside the pores of the HCP films. This strategy might be useful for 3D micro-patterning of biological moieties of interest to the pores for applications in tissue engineering, antibacterial membranes, protein- and cell-based biosensors, microelectronic devices, or filtration membranes [ 119 ].…”

Section: Pore-selective Functionalization Of Hcp Filmsmentioning

confidence: 99%

Modified Breath Figure Methods for the Pore-Selective Functionalization of Honeycomb-Patterned Porous Polymer Films

2022

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Recent developments in the field of the breath figure (BF) method have led to renewed interest from researchers in the pore-selective functionalization of honeycomb-patterned (HCP) films. The pore-selective functionalization of the HCP film gives unique properties to the film which can be used for specific applications such as protein recognition, catalysis, selective cell culturing, and drug delivery. There are several comprehensive reviews available for the pore-selective functionalization by the self-assembly process. However, considerable progress in preparation technologies and incorporation of new materials inside the pore surface for exact applications have emerged, thus warranting a review. In this review, we have focused on the pore-selective functionalization of the HCP films by the modified BF method, in which the self-assembly process is accompanied by an interfacial reaction. We review the importance of pore-selective functionalization, its applications, present limitations, and future perspectives.

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“…Porous polymer films with regular pores have attracted extensive attention due to their broad potential applications in biomimetics, [1] catalysis, [2] separation membranes, [3,4] organic semiconductor, [5,6] photonic, [4,7] antibacterial, [8] and tissue engineering. [9][10][11][12] Various fabrication methods have been developed in the past few decades, [13,14] among which breath figure DOI: 10.1002/mame.202200358 (BF) method is considered as a versatile and handy strategy.…”

Section: Introductionmentioning

confidence: 99%

ISO2‐PU Honeycomb Porous Films with a Peculiar Crystalline Structure by the Breath Figure Method Promote Osteogenic Differentiation of Stem Cells

Yang

Chen

et al. 2022

Macro Materials & Eng

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The breath figure (BF) method is a handy strategy to prepare porous films. Linear shape memory polyurethanes (SMPUs) are among the most promising polymers for bone repair or regeneration. However, little attention has been paid to the fabrication of SMPU films by using the BF method. In this work, an amorphous SMPU containing isosorbide (ISO) in the long‐chain hard segments (ISO2‐PU) is fabricated into honeycomb porous films. Strikingly, a peculiar crystalline structure with a “Z” configuration and highly regional orientation is formed on the hexagonal holes of the porous films, which results in significantly enhanced mechanical properties. Moreover, the ISO2‐PU honeycomb porous films can markedly accelerate the osteogenic differentiation of rat mesenchymal stem cells, indicating that the porous films have great potentials as bone repair materials. It is further speculated that the Marangoni effect in the condensed water droplets and the molecular assembly of ISO2‐PU due to the strong hydrogen bonds and the chiral center effect of ISO are key contributors. This work, to the best of authors’ knowledge, is the first time that this special crystalline structure on BF‐based porous films is observed and also the first speculation that combines Marangoni effect with the microstructure of BF‐based porous films.

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Fabrication and characterization of pore-selective silver-functionalized honeycomb-patterned porous film and its application for antibacterial activity

Cited by 10 publications

References 63 publications

Antibacterial Activity of Polyaniline Coated in the Patterned Film Depending on the Surface Morphology and Acidic Dopant

Antibacterial Activity of Polyaniline Coated in the Patterned Film Depending on the Surface Morphology and Acidic Dopant

Modified Breath Figure Methods for the Pore-Selective Functionalization of Honeycomb-Patterned Porous Polymer Films

ISO2‐PU Honeycomb Porous Films with a Peculiar Crystalline Structure by the Breath Figure Method Promote Osteogenic Differentiation of Stem Cells

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