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.
Introduction
The CNIE at °×С½ãÂÛ̳ has a unique in-house Small/Wide Angle X-ray Scattering (SAXS/WAXS) instrument calledÌýGanesha 300XL. This state-of-the-art SAXS/WAXS is developed by SAXSLAB forÌýÌýwith full motorization, extensive automation, large sample chamber and versatile sample area to provide a highly customised instrument for:
Ìý
- 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 airÌý
- q range 0.0025Ã…-1Ìýto 3 Ã…-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 ofÌýnanoparticles, proteins or surface charges
Application
GaneshaÌý300XLÌýcan be used to evaluate multi-scale structuresÌýsuch asÌýatomic structure (0.2 - 1 nm)Ìýand molecular structure (1 nm to 100 nm). The sample-to-detector distance is changeable in less than one minute with fullÌýmotorization. It's suitable to study materials with different forms including solids (powder, paste, thin film), liquids, liquid-crystals,Ìýand gels (with ordered and disordered structures).
Main applications:
1) Nano-particle size, shapes, distributionÌýand polydispersity analyses.
2)ÌýThree-dimensional protein molecule structure analyses (folding and unfolding).
3)ÌýIdentification of molecular assembly or disassembly.
4)ÌýColloids, metals, cement, oil, polymers, plastics, foods and pharmaceuticals.
Sample PreparationÌý
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
Calibration
Silver Behenate (peak at 0.1076 1/Ã…)
Silver BehenateÌýis 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 NOTÌýthe golden standard that one would hope for because:ÌýSilver 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%.ÌýNeverheless a Silver Behenate sample, when regularly refreshedÌýworks 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.
Specification
·ÌýÌýÌýÌýÌýÌýÌýHigh Brilliance Microfocus Source
·ÌýÌýÌýÌýÌýÌýÌýMotorized 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.
·ÌýÌýÌýÌýÌýÌýÌýFully Evacuated Flight PathÌýfor minimal scattering
·ÌýÌýÌýÌýÌýÌýÌýOn-axis sample Viewer
·ÌýÌýÌýÌýÌýÌýÌýLarge sample areaÌýwith space for potentially complicated sample environments
·ÌýÌýÌýÌýÌýÌýÌýMotorized sample stageÌýwith XY motion (for sample placement and multiple sample mounting) combined with a Θ-stage for standard SAXs and GISAXs
·ÌýÌýÌýÌýÌýÌýÌýPilatus 300K Solid-State Photon-Counting DetectorÌýproviding ultimate noise reduction, high dynamic range, and radiation hardness for long-term maintenance free operation.
·ÌýÌýÌýÌýÌýÌýÌýProprietary Noise-reduction AlgorithmÌýto remove cosmic background
·ÌýÌýÌýÌýÌýÌýÌýMultiple Insertable Beam stopsÌýfor different configurations
·ÌýÌýÌýÌýÌýÌýÌýFull 3-axis Detector MotionÌýof 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
·ÌýÌýÌýÌýÌýÌýÌýReal-time automated Data-Reduction
Scientific Highlights:
To be updated