A Novel Approach for the Fabrication of Silica and Silica/Metal Hybrid Microtubes

Kumar, Kamlesh; Nandan, Bhanu; Luchnikov, Valériy; Simon, Frank; Vyalikh, Anastasia; Scheler, Ulrich; Stamm, Manfred

doi:10.1021/cm901472x

Cited by 29 publications

(23 citation statements)

References 33 publications

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“…Luchnikov demonstrated that polystyrene-poly(4 vinyl pyridine) bilayer [24c] as well as polystyrene-poly(4 vinyl pyridine)-polydimethylsiloxane trilayer [29] are able to roll at low pH when poly(4-vinylpyridine) is protonated and swells in water. Use of layers with 2D gradient of thickness allowed thorough investigation of folding [30].…”

Section: Ph Responsivementioning

confidence: 99%

“…Deposition of patterned metal on the polymer bilayer allowed fabrication of self-rolled tubes with patterned conductive inner wall [24c]. In another example, pyrolysis of polystyrene-poly(4-vinyl pyridine)-polydimethylsiloxane trilayer [29] were used for fabrication of silica tubes. Gracias used self-folding polymers films were used to fabricate self-assembled curved microfluidic networks ( Fig.…”

Section: Properties and Applications Of Self-folding Filmsmentioning

confidence: 99%

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Nature‐Inspired Stimuli‐Responsive Self‐Folding Materials

Ionov¹

2013

Intelligent Stimuli‐Responsive Materials

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INTRODUCTIONEngineering of complex 3D constructs is a highly challenging task for the development of materials with novel optical properties, tissue engineering scaffolds, and elements of micro and nanoelectronic devices. Three-dimensional materials can be fabricated using a variety of methods including two-photon photolithography, interference lithography, molding [1]. The applicability of these methods is, however, substantially limited. For example, interference photolithography allows fabrication of 3D structures with limited thickness. Two-photon photolithography, which allows nanoscale resolution, is very slow and highly expensive. Assembling of 3D structures by stacking of 2D ones is time-consuming and does not allow fabrication of fine hollow structures.Fabrication of 3D microobjects using controlled folding/bending of thin filmsself-folding films-is novel and a very attractive research field [1, 2]. Self-folding films are the examples of biomimetic materials [1]. Such films, on the one hand, mimic movement mechanisms of plants [3] and, on the other hand, are able to selforganize and form complex 3D structures. The self-folding films consist of two materials with different properties. At least one of these materials, active one, can change its volume. Because of the non-equal expansion of the materials, the selffolding films are able to form a tubes-, capsules-or more complex-structure. Similar to origami, the self-folding films provide unique possibilities for the straightforward

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Section: Ph Responsivementioning

confidence: 99%

Section: Properties and Applications Of Self-folding Filmsmentioning

confidence: 99%

Nature‐Inspired Stimuli‐Responsive Self‐Folding Materials

Ionov¹

2013

Intelligent Stimuli‐Responsive Materials

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“…This opens the way for the fabrication of 3D micro‐objects that otherwise cannot be realized. In this section, we describe experiments regarding the fabrication of inorganic microtubes and composite organic–inorganic microtubes 11, 20–21…”

Section: Composite Polymer‐metal and Ceramic Microtubes Produced Vmentioning

confidence: 99%

Self‐Rolled Polymer Tubes: Novel Tools for Microfluidics, Microbiology, and Drug‐Delivery Systems

Luchnikov

lonov

Stamm

2011

Macromol. Rapid Commun.

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Recent work on the fabrication of tubular microstructures via self-rolling of thin, bilayer polymer films is reviewed. A bending moment in the films arises due to the swelling of one component of the bilayer in a selective solvent. The inner diameters of the tubes vary from hundreds of nanometers to dozens of micrometers. The position of the tubes on the substrate and their length can be preset by photolithographic patterning of the bilayer. Prior to rolling, the bilayers can be exposed to different methods of surface functionalization, providing opportunities for engineering the microtube inner surfaces for use in microfluidic circuits and "microbiological" applications. The self-rolling approach is promising for the development of novel drug- and cell-delivery systems, as well as for tissue engineering.

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“…We also adopted the self-rolling phenomena of polymer layers to produce silica and silica/metal hybrid tube [12][13] . A thin film of PDMS was rolled with the P4VP/PS bilayer resulting in the formation of PDMS/P4VP/PS trilayer polymer tube.…”

Section: Hybride Tubesmentioning

confidence: 99%