Systematic parametric investigation on the CVD process of polysiloxane nano- and microstructures

Olveira, Sandro; Stojanović, Ana; Seeger, Stefan

doi:10.1007/s11051-018-4394-0

Cited by 9 publications

(24 citation statements)

References 42 publications

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“…[35,36] The relative humidity also plays an important role in formation of water droplets at the surface. [37,38,39] These water droplets serve as confined reaction vessels. The gaseous germanium tetrachloride reacts with water droplets to produce germanium hydroxide and HCl (Figure 2b).…”

Section: Resultsmentioning

confidence: 99%

Room‐Temperature Synthesis of Germanium Oxide Nanofilaments and Their Potential Use as Luminescent Self‐Cleaning Surfaces

2019

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Germanium oxide nanofilaments (GNFs) have been synthesized under ambient conditions from the gas phase using germanium tetrachloride as a precursor. Non‐crystalline GNFs synthesized by this procedure are 1–10 μm in length and 80–110 nm in diameter applying Droplet Assisted Growth and Shaping (DAGS) Chemistry. The relative humidity has been adjusted at various values in order to demonstrate the crucial role of humidity in the gas phase for the nanofilament synthesis. The novel GNFs show a strong luminescence emission in the ultra‐violet and light blue region. In addition, a self‐cleaning and superhydrophobic properties could be introduced in the luminescent GNF nanofilaments by simple treatment with silane molecules.

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Section: Resultsmentioning

confidence: 99%

Room‐Temperature Synthesis of Germanium Oxide Nanofilaments and Their Potential Use as Luminescent Self‐Cleaning Surfaces

2019

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“…The higher magnification revealed the 1D nanostructures are made of spherical-like shapes arranged in a necklace structure (Figure 1). Usually the synthesis of AlNFs was carried out at relative humidity level of 35% ± 1%, however to observe the influence of humidity on the growth of AlNFs synthesis at different humidity levels was also carried out, since this is a key parameter for SNF growth [15] . The humidity was varied from 2% to 70%, and the grown structures were observed using SEM.…”

Section: Synthesis Of Alnfsmentioning

confidence: 99%

“…The synthesized 1D silicone nanostructures which are called silicone nanofilaments (SNFs) have a diameter in the order of a few nanometers and their length varies from nanometer to micrometer scale [14] . Further, a high variability in structures' shape could be obtained applying this method called "Droplet assisted growth and shaping" (DAGS) by simply adjusting the gas phase composition [15] . The advantage of this room temperature method lies in the fact such as energy efficiency, low cost, facile synthesis method, and ease in scalability and no liquid waste production [16] .…”

Section: Introductionmentioning

confidence: 99%

Droplet assisted growth and shaping of alumina and mixed alumina-silicone 1-dimensional nanostructures

Saddiqi

Seeger

2020

Journal of Colloid and Interface Science

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Since the discovery of silicone nanofilaments a decade ago, room temperature droplet assisted growth and shaping using silanes has been used to synthesize various silicone-based nanostructures. In the present work, we report an extension of this synthesis technique to synthesize nanostructures of new materials. We have successfully synthesized one-dimensional assemblies of beads or necklaces based on alumina (Al) and mixed alumina-silicone (Al Si) nanostructures exhibiting a similar structure as silicone nanofilaments. The characterization of the synthesized nanostructures was performed using different tools, including scanning and transmission electron microscopy, energy dispersive x-ray spectroscopy, and infrared and NMR spectroscopy. Selected area electron diffraction revealed that the nanostructures are amorphous in nature, and the growth behavior and thermal stability of nanostructures are also discussed

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“…The uniaxial extension of the filaments results from the spatial limitation of the water island. 48,49 This paves the way for a new strategy for in situ chemical synthesis of nano-/microstructures. However, there are still some limitations in the synthesis of the existing silicone nanofilaments.…”

Section: ■ Introductionmentioning

confidence: 97%

“…It is believed that the nano- and microdroplets formed on the surface of the substrate are likely to be the starting point for the formation of the one-dimensional structure. The uniaxial extension of the filaments results from the spatial limitation of the water island. , This paves the way for a new strategy for in situ chemical synthesis of nano-/microstructures. However, there are still some limitations in the synthesis of the existing silicone nanofilaments.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Coatings Prepared by the in Situ Growth of Silicone Nanofilaments on Alkali-Activated Geopolymers Surface

Liu

Pang

Wang

et al. 2019

ACS Appl. Mater. Interfaces

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As a highly hydrophobic and good environmental durable material, silicone nanofilaments have shown great advantages in the construction of superhydrophobic coatings. However, the synthesis of these materials has always been limited to the application of trifunctional organosilane monomers under the action of acidic catalysts. For the first time, long-chain polymeric hydrogenated siloxane-poly(methyl-hydrosiloxane) (PMHS) was used to synthesize rapidly silicone nanofilaments in situ under alkaline conditions. A dense silicone nanofilament coating was obtained by PMHS + geopolymer layer on a smooth iron sheet, and achieved by one-step brushing of PMHS on the surface of a just-solidified alkali-activated metakaolin-based geopolymer coating at 120 °C for an hour of sealed curing. This composite coating was followed by a superhydrophobic composite coating with a contact angle of approximately 161° and a rolling angle of 2°. Consistent with this, laser scanning confocal microscopy and field-emission scanning electron microscopy images show the presence of micro- and nanoscale features that enable the entrapment of air when exposed to water and endow excellent superhydrophobic properties. Because geopolymer material has good adhesion ability with metal, ceramic, or other materials, the composite superhydrophobic coating is expected to be widely used.

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Systematic parametric investigation on the CVD process of polysiloxane nano- and microstructures

Cited by 9 publications

References 42 publications

Room‐Temperature Synthesis of Germanium Oxide Nanofilaments and Their Potential Use as Luminescent Self‐Cleaning Surfaces

Room‐Temperature Synthesis of Germanium Oxide Nanofilaments and Their Potential Use as Luminescent Self‐Cleaning Surfaces

Droplet assisted growth and shaping of alumina and mixed alumina-silicone 1-dimensional nanostructures

Superhydrophobic Coatings Prepared by the in Situ Growth of Silicone Nanofilaments on Alkali-Activated Geopolymers Surface

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