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2. Aerogel structure
The structure of silica aerogels has been studied using a variety of techniques, providing information at different scales.
2.1 Spectroscopies
Classical infrared and Raman spectroscopies provide information on the nature of the atomic entities making up the gel.
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The infrared spectrum of aerogel is extremely simple to produce. Given the small amount of material involved, a sample thickness of less than a millimetre is sufficient for transmission experiments.
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Aerogel structure
Optical properties
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