The Small/Wide Angle X-Ray Scattering (SAXS/WAXS) Ganesha 300XL (SAXSLAB) offer many features to sample, below is series of information relating to that.
The CNIE at UCL has a unique in-house Small/Wide Angle X-ray Scattering (SAXS/WAXS) instrument called Ganesha 300XL. This state-of-the-art SAXS/WAXS is developed by SAXSLAB for CNIE with full motorization, extensive automation, large sample chamber and versatile sample area to provide a highly customised instrument for:
- Ambient work with up to 30 solid samples in a single run
- Temperature dependent analysis between -100 and 350°C
- Solution scattering in refillable capillaries from 4 to 80°C
- GISAXS/GIWAXS Analysis
- Time-resolved Micro-fluidics monitoring in air
- q range 0.0025Å-1 to 3 Å-1, 2θ range 2° to 60°
SAXS provides essential information on the structure and dynamics of large molecular assemblies (polymers, colloids and porous materials) in various environments. It is a useful complementary technique to study complex systems such as:
- Heterogeneous catalysts and adsorbents
- Membranes, thin films and interfaces
- Polymer processing/design
- Micro- and nano-fluidic systems
- Supramolecular organisation in biological systems
- Self-assembly of mesoscopic metal particles, colloids, liquid crystals and devices
- distribution, adsorption and arrangement of nanoparticles, proteins or surface charges
Ganesha 300XL can be used to evaluate multi-scale structures such as atomic structure (0.2 - 1 nm) and molecular structure (1 nm to 100 nm). The sample-to-detector distance is changeable in less than one minute with full motorization. It's suitable to study materials with different forms including solids (powder, paste, thin film), liquids, liquid-crystals, and gels (with ordered and disordered structures).
1) Nano-particle size, shapes, distribution and polydispersity analyses.
2) Three-dimensional protein molecule structure analyses (folding and unfolding).
3) Identification of molecular assembly or disassembly.
4) Colloids, metals, cement, oil, polymers, plastics, foods and pharmaceuticals.
1. Load you sample into a 1.0mm or 1.5mm borosilicate glass capillary
2. Seal the capillary either with a flame, superglue or wax
3. Load the capillary samples into the samples holder, and label the samples with its position in log book, e.g.
0305 - samples A
0306 - samples B
0307 - sample C
Silver Behenate (peak at 0.1076 1/Å)
Silver Behenate is the standard for SAXS machines., with a peak in the middle of the traditional SAXS region, a strong scattering pattern and a shelf-life of several years (when kept dry and in the dark). Unfortunately Silver Behenate is NOT the golden standard that one would hope for because: Silver Behenate varies from supplier to supplier; Silver Behenate degrades over time when subjected to air, humidity and/or lightSilver; Behenate often shows peak splitting at higher orders, with peaks separated by about 1.7%. Neverheless a Silver Behenate sample, when regularly refreshed works out as a nice, well accepted standard for many SAXS applications. The SAXS scattering pattern of a standard silver behenate powder sample wrapped in aluminum paper is shown.
· High Brilliance Microfocus Source
· Motorized Collimation System: consisting of JJ X-Ray high precision 4-blade slits with single crystal low-scatter blades. The continuously variable aperture sizes allow for an unlimited choice of resolution.
· Fully Evacuated Flight Path for minimal scattering
· On-axis sample Viewer
· Large sample area with space for potentially complicated sample environments
· Motorized sample stage with XY motion (for sample placement and multiple sample mounting) combined with a Θ-stage for standard SAXs and GISAXs
· Pilatus 300K Solid-State Photon-Counting Detector providing ultimate noise reduction, high dynamic range, and radiation hardness for long-term maintenance free operation.
· Proprietary Noise-reduction Algorithm to remove cosmic background
· Multiple Insertable Beam stops for different configurations
· Full 3-axis Detector Motion of the detector, achieving sample-to-detector distances between 80 mm and 1450 mm, and allowing for measurement with the beam centred on the detector as well as off-cantered
· Real-time automated Data-Reduction
To be updated