Advantages and limitations
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<u>Advantages</u>: |
<u>Advantages</u>: |
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* '''Low processing temperatures''': In contrast to classical sol-gel, the conversion of PHPS can take place at room temperature. This makes it compatible with polymeric or sensitive substrates. |
* '''Low processing temperatures''': In contrast to classical [[sol-gel]], the conversion of PHPS can take place at room temperature. This makes it compatible with polymeric or sensitive substrates. |
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* '''Solubility and processing''': PHPS is soluble in non-polar solvents, which makes spin coating, dip coating and electrospinning possible. |
* '''Solubility and processing''': PHPS is soluble in [[non-polar]] solvents, which makes [[spin coating]], [[Dip-coating|dip coating]] and [[electrospinning]] possible. |
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* '''Pure end product''': Since PHPS does not contain any organic residues, it produces a virtually carbon-free silica after complete conversion. |
* '''Pure end product''': Since PHPS does not contain any organic residues, it produces a virtually carbon-free silica after complete conversion. |
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* '''Precise patterning''': Due to its compatibility with UV and lithographic techniques, patterns and structures on a micron to nanometer scale can be realized. |
* '''Precise patterning''': Due to its compatibility with UV and [[Lithography|lithographic]] techniques, patterns and structures on a micron to nanometer scale can be realised. |
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<u>Disadvantages</u>: |
<u>Disadvantages</u>: |
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* '''Limited long-term stability''': With long-term storage, the viscosity and reactivity may decrease due to slow polymerisation. |
* '''Limited long-term stability''': With long-term storage, the viscosity and reactivity may decrease due to slow polymerisation. |
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* Shrinkage and Cracking: Significant volume shrinkage occurs during thermal post-treatment, which can induce stresses in the material. |
* '''Shrinkage and Cracking''': Significant volume shrinkage occurs during thermal post-treatment, which can induce stresses in the material. |
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* '''Limited Commercial Availability''': PHPS is not widely available and often requires laboratory synthesis |
* '''Limited Commercial Availability''': PHPS is not widely available and often requires laboratory synthesis |