Surface-Induced Selective Delamination of Amphiphilic ABA Block Copolymer Thin Films

Popescu, Daniela C.; Rossi, Nicholas A. A.; Yeoh, Chert-Tsun; Durand, G.; Wouters, D Daan; Leclère, Ph.; Thüne, Peter C.; Holder, Simon J.; Sommerdijk, Nico A. J. M.

doi:10.1021/ma0356010

Cited by 16 publications

(14 citation statements)

References 37 publications

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“…Materials: Poly(oligoethylene glycol methyl ether methacrylate)-block-poly(methylphenylsilane)-block-poly(oligoethylene glycol methyl ether methacrylate) (POEGMA-PMPS-POEGMA) 1 was synthesized according to procedures previously described [28] and poly(oligoethylene glycol methyl ether methacrylate)-block-polystyrene-block-poly(oligoethylene glycol methyl ether methacrylate) (POEGMA-PS-POEGMA) 2 was synthesized according to a procedure previously described in a preliminary form [11]; a more detailed synthetic discussion is forthcoming. Ultrapure water (18 MX cm) was generated using a Barnstead EASYpure LF water purification system.…”

Section: Methodsmentioning

confidence: 99%

“…Ultrapure water (18 MX cm) was generated using a Barnstead EASYpure LF water purification system. Substrate Preparation: Substrates and polymer films were prepared as described previously with the exception that, for the preparation of the gold patterns, both the gold and the underlying chromium layer were deposited through a suitable mask [11].…”

Section: Methodsmentioning

confidence: 99%

“…[10] Recently we reported the unforeseen property of the selective adhesion/delamination of amphiphilic block-copolymer films in coating hydrophobic and hydrophilic substrates. [11] When spin-coated from tetrahydrofuran (THF) solutions onto a hydrophilic substrate, such as glass, amphiphilic poly(oligoethylene glycol methyl ether methacrylate) (POEGMA)-based ABA block copolymers 1 and 2 formed thin films with hydrophobic surfaces. Upon exposure to water, these films rearranged such that a hydrophilic surface is exposed before they delaminated from the substrate.…”

mentioning

confidence: 99%

“…X-ray photoelectron spectroscopy studies also revealed that, even if there was enrichment in the hydrophobic PMPS block within the first 10 nm of the film (about 20 % more than in the bulk of the film), the POEGMA block was also present at the surface. [11] In air, there is expected to be an enrichment in the more hydrophobic part of the block copolymer at the surface of the film in order to lower the free energy of the air/polymer interface. It is known, however, that upon exposure to water, the surface of amphiphilic block copolymers can reorganize to expose the more hydrophilic part to water.…”

mentioning

confidence: 99%

“…We have previously demonstrated that the selective adhesion/delamination behavior of the block copolymers 1 and 2 was not restricted to gold and glass substrates. [11] In general, upon exposure to water the block copolymer films delaminate from various hydrophilic substrates (contact angle with water, h = 10±50), while being stable on hydrophobic substrates (h = 70±90). In principle, therefore, this method would allow for the generation of patterns of cells on a variety of substrates (with different flexibility), provided that they have been pre-patterned in hydrophilic and hydrophobic regions.…”

mentioning

confidence: 99%

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The Patterning and Alignment of Muscle Cells Using the Selective Adhesion of Poly(oligoethylene glycol methyl ether methacrylate)‐based ABA Block Copolymers

et al. 2005

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

mentioning

confidence: 99%

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The Patterning and Alignment of Muscle Cells Using the Selective Adhesion of Poly(oligoethylene glycol methyl ether methacrylate)‐based ABA Block Copolymers

et al. 2005

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Self‐Assembled Nanoscale Ring Arrays from a Polystyrene‐b‐polyferrocenylsilane‐b‐poly(2‐vinylpyridine)Triblock Terpolymer Thin Film

et al. 2009

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Block copolymers can microphase-separate into periodic nanoscale structures with well-defined geometries and length scales, making them attractive materials for self-assembled nanolithography. [1][2][3][4] Ordered arrays of block copolymer spheres, cylinders, or lamellae have been used to pattern features in functional materials with sizes of $10-50 nm. The fabrication of a range of devices, such as silicon capacitors and transistors, discrete magnetic storage media, and photonic crystals, [5][6][7][8] have been demonstrated using block copolymer lithography.Previous work has mainly focused on diblock copolymers, with the study of triblock or multiblock copolymers being less actively pursued, largely due to the increased level of synthetic difficulty. However, these materials offer a wider range of geometries than the line and dot patterns available from diblock copolymers, making them potentially valuable for nanolithography applications. In particular, triblock terpolymers can form ring shaped features, which are useful in the fabrication of memories or sensors, [9][10][11] and quantum devices. [12][13][14] Ring-shaped structures have been formed previously from thin films of core/shell structured linear ABC triblock terpolymers, [15][16][17] in which the cylinders are oriented perpendicular to the film plane during the anneal process. However, this work, as well as work on thin film triblock terpolymers of other morphologies, [18] has focused on materials in which all three blocks consist of organic segments. This can limit the utility of these materials in nanoscale lithography because the etch selectivity between the blocks, and their etch resistance for subsequent pattern transfer steps, is typically low. It is therefore interesting to examine thin film triblock terpolymers in which one of the blocks contains inorganic components which impart high etch selectivity and etch resistance.Triblock copolymers containing inorganic blocks such as polyphosphazenes, [19,20] polysilanes [21,22] and polysulfides [23] have been prepared previously. However, these are symmetrical ABA type triblock copolymers, which phase separate on the nanoscale into morphologies comparable to diblock copolymers.There have been several studies on bulk ABC triblock terpolymers with an inorganic polydimethylsiloxane (PDMS) block, [24][25][26] such as polyisoprene-b-polystyrene-b-poly(dimethyl siloxane) [24,25] and poly(ethyleneoxide)-b-poly(dimethyl siloxane)-b-poly(methyl oxazoline). [26] Polyferrocenylsilane (PFS) is a metal-containing polymer with iron and silicon in the polymer backbone.[27] Synthesis of PFS with controlled molecular weights and narrow polydispersities is achieved by a living anionic mechanism. [28,29] PFS has also been incorporated into multiblock copolymers with a variety of organic and inorganic coblocks. [28][29][30][31][32][33][34] These block copolymers microphase-separate to give ordered arrays of iron and silicon containing nanostructures, which have already been used in lithographic applications. [35][36][37]...

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Shaping Amorphous Calcium Carbonate Films into 2D Model Substrates for Bone Cell Culture

Popescu¹,

Leeuwen²,

Rossi³

et al. 2006

Angewandte Chemie

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Bone is a highly organized composite material that has the capacity to heal and remodel itself. During the remodeling process, bone is resorbed by osteoclasts (bone-resorbing cells), which subsequently undergo apoptosis or return to the non-resorbing stage. Their place is taken by osteoblasts (bone-producing cells), which synthesize the new mineralized matrix. [1,2] Nevertheless, the self-repair of bone is limited to small bone defects, and its ability to regenerate decreases with age and is affected by diseases. Amongst other materials, biogenic calcium carbonate, for example, coral skeletons and sea urchin spines, has been developed as a promising material for bone replacement and regeneration as it is easily resorbed by osteoclasts and replaced by native bone. Moreover, nacre (present in mollusk shells) shows bone-conductive properties, that is, it stimulates the activity of osteoblasts and induces the formation of new bone. Synthetic, bio-inspired organicinorganic composites are currently emerging as new materials for bone regeneration, and offer more possibilities to tune

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Surface-Induced Selective Delamination of Amphiphilic ABA Block Copolymer Thin Films

Cited by 16 publications

References 37 publications

The Patterning and Alignment of Muscle Cells Using the Selective Adhesion of Poly(oligoethylene glycol methyl ether methacrylate)‐based ABA Block Copolymers

The Patterning and Alignment of Muscle Cells Using the Selective Adhesion of Poly(oligoethylene glycol methyl ether methacrylate)‐based ABA Block Copolymers

Self‐Assembled Nanoscale Ring Arrays from a Polystyrene‐b‐polyferrocenylsilane‐b‐poly(2‐vinylpyridine)Triblock Terpolymer Thin Film

Shaping Amorphous Calcium Carbonate Films into 2D Model Substrates for Bone Cell Culture

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