Construction and control of 3D porous structure based on vapor deposition on sublimation solids
| Autor: | Ho-Yi Sun, Ting-Pi Sun, Zhen-Yu Guan, Hsing-Ying Tung, Ling Chao, Hsien-Yeh Chen, Shu-Kai Hu |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Hybrid physical-chemical vapor deposition Nanotechnology 02 engineering and technology Chemical vapor deposition 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Hexane chemistry.chemical_compound Template chemistry Chemical engineering General Materials Science Sublimation (phase transition) Thin film 0210 nano-technology Porosity Deposition (law) |
| Zdroj: | Applied Materials Today. 7:77-81 |
| ISSN: | 2352-9407 |
| DOI: | 10.1016/j.apmt.2016.12.005 |
| Popis: | Three-dimensional porous structures are constructed via vapor deposition onto a sublimating solid template. Construction upon deposition of vapor-phase material occurs at a dynamic vapor–solid interface and is directed by the solid surface vanishing by sublimation. A proof-of-concept demonstration showed vapor depositions of poly- para -xylylenes (PPXs) on sublimating templates, including ice and mixtures with ethanol and hexane. The material construction macroscopically produces a replica architecture of the parent template. Characteristics of the pore structures are formed during the construction process as a result of the gas vapor and the space that is vacated by sublimation, thus enabling control of the porosity through regulation of the sublimation speed and/or the thermodynamic properties of the templates. The technology introduced herein provides a novel approach for 3D porous material manufacturing and overturns the notion that vapor deposition necessarily forms dense thin films on substrates. |
| Databáze: | OpenAIRE |
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