Small Angle X-Ray Scattering
- Manufacturer: Molecular Metrology (currently Rigaku http://www.rigaku.com/saxs/)
- Source: Pin hole camera with Osmic microfocus source and parallel beam optic
- Detector: Multiwire area detector
- Angular ranges: approx. q=0.007 to 0.200 (2Ө=0.10 to 2.8 degrees)
- Applications and Accessories: SAXS uses Cu Ka X-ray scattering at very small angles to probe structure in zones of electron density contrast with sizes in the range of 3nm to 100nm. Such structures can include particulate systems, multi-phase systems, pore structures, emulsions, biological and cellular structures and others. Information about size, shape, dispersity, periodicity, interphase boundary area and solution properties can be obtained. Applications in polymers and biological samples are abundant and well known.
- temperature controlled specimen holder (5-300 deg C)
- shear cell
- liquid cell
- Analyses:
- Structure in polymers, polymer blends, solutions, copolymer
- Biological membrane structures
- Structure of catalysts, xerogels, functionalized silica, coal and other porous materials
- Nano precipitate size and dispersity in alloys
- Sample Preparation: Specimens may be solids, films, powders, liguids, gels, crystalline or amorphous. Solids and films must be thin enough to be X-ray transparent and thick enough to present adequate sample volume in transmission. Estimates of nominal thickness are as follows:
- 1-2 mm for polymers and biological samples,
- 0.3 - 0.8 mm for ceramics,
- 0.05 - 0.2 mm for metals and alloys
- 1 mm for water solutions
- 1.5-2 mm for organic solvent solutions
The area required is as small as 1 mm2. The beam cross section is approximately 0.8 mm diameter.