Giant nanomembrane of covalently-hybridized epoxy resin and silica

Watanabe, Hisayuki; Muto, Emi; Ohzono, Takuya; Nakao, Aiko; Kunitake, Toyoki

doi:10.1039/b819213h

Cited by 34 publications

(29 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The term giant nanomembrane was coined by Kunitake et al [1] to denote selfsupporting membranes with thickness (L) from 1 to 100 nm and an aspect ratio of size and thickness higher than 10 6 . Besides such characteristics, these free-standing nanomembranes (FsNMs) exhibit other special properties, such as easiness of handling, low weight, high flexibility, robustness and, in some cases, transparency [2].…”

Section: Introductionmentioning

confidence: 99%

Nanoperforations in poly(lactic acid) free-standing nanomembranes to promote interactions with cell filopodia

Puiggalı́-Jou

Medina

Valle

et al. 2016

European Polymer Journal

View full text Add to dashboard Cite

Nanoperforated poly(lactic acid) (PLA) free-standing nanomembranes (FsNMs) have been prepared using a two-step process: (1) spin-coating a mixture of immiscible polymers to provoke phase segregation and formation of appropriated nanofeatures (i.e. phase separation domains with dimensions similar to the entire film thickness); and (2) selective solvent etching to transform such nanofeatures into nanoperforations. For this purpose, PLA has been mixed with polyethylene glycol (PEG) and poly(vinyl alcohol) (PVA). Unfortunately, the characteristic of PLA:PEG mixtures were not appropriated to prepare nanoperforated FsNMs. In contrast, perforated PLA FsNMs with pores crossing the entire film thickness, which have been characterized by scanning electron microscopy and atomic force microscopy, were obtained using PLA:PVA mixtures. The diameter () of such pores has been controlled through both the PLA:PVA ratio and the processing conditions of the mixtures, FsNMs with pores of  0.8 m, 170 nm and 65 nm being achieved. Investigations on nanoperforated FsNMs (i.e. those with   170 and 65 nm), which are the more regular, reveal that pores crossing the entire membrane thickness do not affect the surface wettability of PLA but drastically enhances the cellular response of this biomaterial. Thus, cell proliferation assays indicate that cell viability in PLA with perforations of  170 nm is 2.6 and 2.2 higher than in nonperforated PLA and PLA with perforations of  65 nm, respectively. This excellent response has been attributed to the similarity between the nanoperforations with  170 nm and the filopodia filaments in cells (100-200 nm), which play a crucial role in cell migration processes. The favorable interaction between the perforated membrane nanofeatures and cell filopodia has been corroborated by optical and scanning electron microscopies.3

show abstract

Section: Introductionmentioning

confidence: 99%

Nanoperforations in poly(lactic acid) free-standing nanomembranes to promote interactions with cell filopodia

Puiggalı́-Jou

Medina

Valle

et al. 2016

European Polymer Journal

View full text Add to dashboard Cite

show abstract

“…The above requirements are difficult to meet since commonly used inorganic silicon membranes are rather stiff with E ‐moduli larger than 100 GPa . Much more flexible are organic polymer membranes with thicknesses between 20–100 nm but their E ‐moduli are still in a low GPa range . Much lower values of the E ‐modulus are required to reach a considerable improvement in the sensitivity in the given thicknesses range …”

mentioning

confidence: 99%

Ultraflexible, Freestanding Nanomembranes Based on Poly(ethylene glycol)

Meyerbröker

Zharnikov

2014

Advanced Materials

View full text Add to dashboard Cite

Extremely elastic and highly stable nanomembranes of variable thickness (5-350 nm) made completely of poly(ethylene glycol) are prepared by a simple procedure. The membranes exhibit distinct biorepulsive and hydrogel properties. They offer new possibilities for applications such as supports in transmission electron microscopy, matrices for inorganic nanoparticles, and pressure-sensitive elements for sensors.

show abstract

“…On the other hand, inorganic materials are relatively brittle. In order to achieve both flexibility and robustness, one option is to combine the advantages of organic and inorganic materials, which can be realized at different levels: physical mixing101, 102 and chemical hybridization 103–106. The robustness of the freestanding nanomembrane can be remarkably improved through hybridization via covalent bonding of organic and inorganic materials 105, 106.…”

Section: Ultra‐thin Nanomembranesmentioning

confidence: 99%

“…In order to achieve both flexibility and robustness, one option is to combine the advantages of organic and inorganic materials, which can be realized at different levels: physical mixing101, 102 and chemical hybridization 103–106. The robustness of the freestanding nanomembrane can be remarkably improved through hybridization via covalent bonding of organic and inorganic materials 105, 106. Ultra‐thin organic‐inorganic hybrid nanomembranes with an interpenetrating network structure consisting of polymer and silica, zirconia, or titania have been reported in literature 105, 106.…”

Section: Ultra‐thin Nanomembranesmentioning

confidence: 99%

Cyclization of Synthetic seco‐Proansamitocins to Ansamitocin Macrolactams by Actinosynnema pretiosum as Biocatalyst

et al. 2010

View full text Add to dashboard Cite

Conventional solid films on certain substrates play a crucial role in various applications, for example in flat panel displays, silicon technology, and protective coatings. Recently, tremendous attention has been directed toward the thinning and shaping of solids into so‐called nanomembranes, offering a unique and fantastic platform for research in nanoscience and nanotechnology. In this Review, a conceptual description of nanomembranes is introduced and a series of examples demonstrate their great potential for future applications. The thinning of nanomembranes indeed offers another strategy to fabricate nanomaterials, which can be integrated onto a chip and exhibit valuable properties (e.g. giant persistent photoconductivity and thermoelectric property). Furthermore, the stretching of nanomembranes enables a macroscale route for tuning the physical properties of the membranes at the nanoscale. The process by which nanomembranes release from a substrate presents several approaches to shaping nanomembranes into three‐dimensional architectures, such as rolled‐up tubes, wrinkles, and the resulting channels, which can provide fascinating applications in electronics, mechanics, fluidics, and photonics. Nanomembranes as a new type of nanomaterial promise to be an attractive direction for nanoresearch.

show abstract

Giant nanomembrane of covalently-hybridized epoxy resin and silica

Cited by 34 publications

References 43 publications

Nanoperforations in poly(lactic acid) free-standing nanomembranes to promote interactions with cell filopodia

Nanoperforations in poly(lactic acid) free-standing nanomembranes to promote interactions with cell filopodia

Ultraflexible, Freestanding Nanomembranes Based on Poly(ethylene glycol)

Cyclization of Synthetic seco‐Proansamitocins to Ansamitocin Macrolactams by Actinosynnema pretiosum as Biocatalyst

Contact Info

Product

Resources

About