Theoretical and experimental characterization of wettability of various nanolens arrayed polymer surfaces replicated with nanodimpled aluminum mold insert

Yeo, Jihoon; Ryu, Jejun; Lee, Dong-Weon; Byeon, Euihyeon; Kwon, Tai Hun; Kim, Dong Sung

doi:10.1007/s00542-010-1092-y

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…Before the plasma treatment, the contact angles of the flat, NPS-Pi and NPS-Po were measured to be 86.9 ± 1.4 • , 115.2 ± 1.4 • and 134.5 ± 2.3 • , respectively. The contact angles of NPS were similar to theoretical contact angles predicted by the Cassie-Baxter wetting model (supplementary data available at stacks.iop.org/BF/5/025007/mmedia) [34]. The hydrophobic nature of PS surfaces provides an unfavorable environment for cell attachment due to decreasing protein adsorption as well as inhibiting cell spreading.…”

Section: Physical and Mechanical Properties Of Npssupporting

confidence: 75%

Enhanced osteogenic fate and function of MC3T3-E1 cells on nanoengineered polystyrene surfaces with nanopillar and nanopore arrays

Hong

Cho

et al. 2013

Biofabrication

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During in vitro culture, cell fate and function, including cell adhesion, morphology, proliferation and differentiation, are affected by surface characteristics, such as geometry, wettability, hardness, chemistry and charge. This study replicated two different types of nanoengineered polystyrene surfaces (NPS) containing nanopillar (NPS-Pi) or nanopore (NPS-Po) arrays by hot embossing and investigated their topographical effects on cell behavior using osteoblast-like MC3T3-E1 cells. To mass-replicate NPS, rigid metal nano-stamps were manufactured by nickel electroforming onto two different nano-templates: (1) a nanopore-arrayed anodic aluminum oxide nano-template using two-step electrochemical oxidation and (2) a nanopillar-arrayed polymer using hot embossing process. The physical and mechanical properties of the NPS, including geometry, wettability, hardness and elastic modulus, were evaluated with the help of field emission-scanning electron microscopy, a contact angle meter, and a nanoindenter. The nanotopography maintained the bulk property, while drastically changing the surface properties. In vitro the NPS had significant effects on MC3T3-E1 cell morphology, attachment, proliferation and osteogenic differentiation compared to a flat substrate due to the altered physical and mechanical surface properties of the nanoengineered surface. Interestingly, the NPS-Po was more effective at enhancing cell proliferation and osteogenesis differentiation. One potential explanation for these results may be that the subcellular binding sites induced by the nanostructures changed the cell morphology and promoted contractile cytoskeletons, thereby enhancing osteogenic differentiation. This, which allows for the cost-effective replication of NPS and the control of cell behavior, has various applications with respect to biomedical and cell surface interaction studies, in addition to enhanced osteogenic cell fate and function.

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Section: Physical and Mechanical Properties Of Npssupporting

confidence: 75%

Enhanced osteogenic fate and function of MC3T3-E1 cells on nanoengineered polystyrene surfaces with nanopillar and nanopore arrays

Hong

Cho

et al. 2013

Biofabrication

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“…Whether a contact angle is in the Wenzel or Cassie and Baxter state depends on the arrangement and shape of the surface features. Some authors mention that the water droplet on hemispherically arrayed surfaces occurs in the Wenzel state (Yeo et al 2010) and others reported that air pockets trapped in micro-and nanoholes increase the contact angle of liquid droplets (Lee et al 2007, Martines et al 2006.…”

Section: Static Contact Angle Measurements On the Molded Surface Feat...mentioning

confidence: 99%

The reflectivity, wettability and scratch durability of microsurface features molded in the injection molding process using a dynamic tool tempering system

Kuhn

Burr

Kübler

et al. 2011

J. Micromech. Microeng.

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In this paper the replication qualities of periodically and randomly arranged micro-features molded in the injection molding process and their effects on surface properties are studied. The features are molded in PC, PMMA and PP at different mold wall temperatures in order to point out the necessity and profitability of a variotherm mold wall temperature control system. A one-dimensional heat conduction model is proposed to predict the cycle times of the variotherm injection molding processes. With regard to these processes, the molding results are compared to the molded surface feature heights using an atomic force microscope. In addition, the effects of the molded surface features on macroscopic surfaces are characterized in terms of light reflection using a spectrometer and in terms of water wettability by measuring the static contact angle. Furthermore, due to the sensitivity of the surface features on the molded parts, their durability is compared in a scratch test with a diamond tip. This leads to successful implementation in applications in which the optical appearance, in terms of gloss and reflection, and the water repellence, in terms of drag flow and adhesion, are of importance.

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“…The demands for scale up of polymer nanoengineered surfaces (NES) have increased in the fields of various functional surfaces, such as antireflective surfaces, hydrophobic surfaces and antifouling surfaces [1][2][3]. Moreover, in the cell-NES interaction study, which is to understand and regulate cell fate and functions on the NES, the polymer NES is getting more important due to the cost-effectiveness and wide choices of polymer replication processes compared with other materials and fabrication methods [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Nano Petri dishes: a new polystyrene platform for studying cell-nanoengineered surface interactions

Kim

et al. 2014

J. Micromech. Microeng.

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In this study, we fabricated and fully characterized a new type of polystyrene (PS) cell-culture platform containing nanoengineered surfaces (NES), referred to as a nano Petri dish, which can be used at the transition stage of basic cell–NES interaction studies for clinical applications. Nano-injection molding in this study was used for the mass production of the nano Petri dish having nanopore arrays. The effects of processing parameters of the injection molding on the replication quality of the nanopore arrays were quantitatively evaluated by means of design of experiments based on the Taguchi method. This allowed efficient and reliable cell culture studies by providing large numbers of the same dishes, in addition to removing the fixation step of the NES plates inside the cell-culture container. Physical, chemical and mechanical properties of the NES, as well as cell behavior including attachment and proliferation of human osteosarcoma MG-63 cells on the NES, were then characterized, with and without the oxygen plasma surface treatment.

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Theoretical and experimental characterization of wettability of various nanolens arrayed polymer surfaces replicated with nanodimpled aluminum mold insert

Cited by 10 publications

References 25 publications

Enhanced osteogenic fate and function of MC3T3-E1 cells on nanoengineered polystyrene surfaces with nanopillar and nanopore arrays

Enhanced osteogenic fate and function of MC3T3-E1 cells on nanoengineered polystyrene surfaces with nanopillar and nanopore arrays

The reflectivity, wettability and scratch durability of microsurface features molded in the injection molding process using a dynamic tool tempering system

Nano Petri dishes: a new polystyrene platform for studying cell-nanoengineered surface interactions

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