Exact Replication of Biological Structures by Chemical Vapor Deposition of Silica

Cook, Gary; Timms, Peter L.; Göltner-Spickermann, Christine

doi:10.1002/anie.200390160

Cited by 178 publications

(122 citation statements)

References 12 publications

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“…Other methods, such as chemical vapor deposition (CVD), conformal-evaporated-film-byrotation (CEFR), and deposition in supercritical fluid (Cook et al, 2003, Martín-Palma et al, 2008, Pfluger et al, 2010, Wang et al, 2005 have been utilized to precisely replicate the complex and irregular hierarchical topography from a biological sample over several length scales. Pfluger et al (Pfluger et al, 2010) reported precise replication of the complex topography of pig small intestinal basement membrane using plasma enhanced CVD of biocompatible polymer: poly(2-hydroxyethyl methacrylate) (pHEMA) (Figure 3).…”

Section: Patterned Cell Culture Substrates: Fabrication Methods and Matmentioning

confidence: 99%

“…Chemical vapor deposited pHEMA is able to replicate villus (100 -200 μm in height, 50 -150 μm in diameter), crypt (20 -50 μm in diameter), and pore (1 -5 μm in diameter) structures on the surface of intestinal basement membrane; the thickness of pHEMA coating is around 1 μm. Cook et al (Cook et al, 2003) demonstrated replication of the surface features of butterfly wings using controlled vapor-phase oxidation of silanes. Hydrogen peroxide was evaporated and reacted with gaseous silane creating silica primary clusters, which have extraordinary flow properties and are able to creep into small gaps on the surface of a biological specimen.…”

Section: Patterned Cell Culture Substrates: Fabrication Methods and Matmentioning

confidence: 99%

See 1 more Smart Citation

Biomimetic Topography: Bioinspired Cell Culture Substrates and Scaffolds

Wang¹

2011

Advances in Biomimetics

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Section: Patterned Cell Culture Substrates: Fabrication Methods and Matmentioning

confidence: 99%

Section: Patterned Cell Culture Substrates: Fabrication Methods and Matmentioning

confidence: 99%

Biomimetic Topography: Bioinspired Cell Culture Substrates and Scaffolds

Wang¹

2011

Advances in Biomimetics

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“…Different methods have been utilized to fabricate the hybrid materials, which combined the biomass substances with inorganic materials. For example, Cook and Timms designed an exact replication of biological structure by using chemical vapor deposition (CVD) of silica (Cook and Timms 2003). Atomic layer deposition (ALD) was used for the preparation of photocatalytic TiO2/cellulose composites in nanometer-level replication of cellulosic substances (Kemell et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Preparation and Photocatalytic Activity of TiO2-Wrapped Cotton Nanofiber Composite Catalysts

Zhang

Wan

et al. 2017

BioRes

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A novel TiO2-wrapped nanofiber composite catalyst, which possessed a unique porous structure and mixed crystalline phase, was prepared by the combination of superficial sol-gel and post-calcination processes. By means of the superficial sol-gel process, TiO2 layers were deposited on the surface of each nanofiber-like cellulose fiber, and then the TiO2-wrapped nanofiber composite catalysts were calcined at different temperatures under a nitrogen atmosphere. With temperature increasing, the original cotton nanofiber composites were converted into porous carbon nanofiber catalysts wrapped by a TiO2 mixed crystalline phase, which was accompanied by a crystal transformation. The photocatalytic activity of the new catalysts was evaluated by the degradation of methylene blue (MB) under ultraviolet (UV) irradiation. The results demonstrated that the new catalysts had good photocatalytic ability, and the TNC-700 catalyst showed a superior photocatalytic ability compared with the other catalysts; the new catalysts had a unique porous structure, high specific surface area, and mixed crystalline phase. Additionally, the synergistic photocatalytic effect of the TiO2 and activated carbon nanofiber resulted in the efficient degradation of organic pollutants in water or air.

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“…A number of techniques have been used for the fabrication of three-dimensional (3D) photonic crystals including silicon micromachining, 3 holographic lithography, 4 self-assembly, 5,6 glancing-angle deposition, 7,8 autocloning, 9 and biotemplate replication. [10][11][12][13] However, for these techniques, major drawbacks include the postprocessed polycrystalline structure, high processing cost, and low defect controllability. 14 It is a challenge to fabricate single crystalline 3D nanophotonic crystals at low-cost, large scale, and high efficiency.…”

mentioning

confidence: 99%

Multicolored ZnO Nanowire Architectures on Trenched Silicon Substrates

2007

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Well-tailored three-dimensional (3D) ZnO nanowire architectures have been successfully grown on Si microtrenches fabricated using nanoimprinting lithography by a low-temperature hydrothermal approach. Au nanoparticles or ZnO nanofilms were used as templates to tailor the orientation ordered nanowire growth normal to the microtrench surface. Au produced sparse nanowire growth, while ZnO seeds created densely packed growth. Optically, other than displaying a primary color when viewed from one incident angle, the 3D nanowire architecture periodically displayed multiple primary color domains covering all microtrenches and the local orientation ordered nanowire arrays. A pre-growth annealing of ZnO nanoseeds resulted in nonuniformity and non-periodic distribution of the grown nanoarchitectures and thus reduced the multicolor effect.Photonic crystals comprised of regularly spaced nanobuilding blocks such as nanoparticles (NPs), nanowires (NWs), and nanobeams (NBs) can offer unique optical properties and therefore have promising applications in nanolasers, 1,2 nanophotonics, and quantum computing. A number of techniques have been used for the fabrication of three-dimensional (3D) photonic crystals including silicon micromachining, 3 holographic lithography, 4 self-assembly, 5,6 glancing-angle deposition, 7,8 autocloning, 9 and biotemplate replication. 10-13 However, for these techniques, major drawbacks include the postprocessed polycrystalline structure, high processing cost, and low defect controllability. 14 It is a challenge to fabricate single crystalline 3D nanophotonic crystals at low-cost, large scale, and high efficiency.Here in this work, by combining the nanoimprinting lithography (NIL) technique and low-temperature chemical synthesis approach, a new strategy has been developed for fabricating large scale 3D ordered NW architectures. On the basis of Si microtrenches with a two-dimensional (2D) cross-sectional profile, we successfully tailored the growth of 3D ZnO NW architectures using low-temperature hydrothermal synthesis. Optically, 3D NW architectures exhibited unique multicolored nanodiffraction effects distinct from the 2D NW arrays on flat Si surface. This work demonstrates that in combination with this low-temperature synthesis technique, well-defined 3D substrates produced using NIL can be used to engineer welloriented 3D NW architectures as potential multicolored nanodisplays, nanophotonic interconnects, and nanowaveguides.The growth of ZnO NWs was conducted by suspending the Au or ZnO seeds modified substrates in a Pyrex glass bottle filled with an equal molar aqueous solution of zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O, 0.01 M) and hexamethylenetetramine (C 6 H 12 N 4 , 0.01 M) at 80°C. 15 The reaction time was 2-18 h for both substrates coated with Au or layers with ZnO seeds. After reaction, the substrates were removed from the solution, rinsed with deionized water, and dried in air at 80°C overnight. The structure and morphology of ZnO NWs were characterized by scanning electron microsco...

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Exact Replication of Biological Structures by Chemical Vapor Deposition of Silica

Cited by 178 publications

References 12 publications

Biomimetic Topography: Bioinspired Cell Culture Substrates and Scaffolds

Biomimetic Topography: Bioinspired Cell Culture Substrates and Scaffolds

Preparation and Photocatalytic Activity of TiO2-Wrapped Cotton Nanofiber Composite Catalysts

Multicolored ZnO Nanowire Architectures on Trenched Silicon Substrates

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