Close
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 皇家华人 has a unique in-house Small/Wide Angle X-ray Scattering (SAXS/WAXS) instrument called听Ganesha 300XL. This state-of-the-art SAXS/WAXS is developed by SAXSLAB for听听with full motorization, extensive automation, large sample chamber and versatile sample area to provide a highly customised instrument for:
听
- Ambient work with up to 30 solid samples in a single run
- Temperature dependent analysis between -100 and 350掳C
- Solution scattering in refillable capillaries from 4 to 80掳C
- GISAXS/GIWAXS Analysis
- Time-resolved Micro-fluidics monitoring in air听
- q range 0.0025脜-1听to 3 脜-1, 2胃 range 2掳 to 60掳
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听nanoparticles, proteins or surface charges
Application
Ganesha听300XL听can be used to evaluate multi-scale structures听such as听atomic structure (0.2 - 1 nm)听and molecular structure (1 nm to 100 nm). The sample-to-detector distance is changeable in less than one minute with full听motorization. It's suitable to study materials with different forms including solids (powder, paste, thin film), liquids, liquid-crystals,听and gels (with ordered and disordered structures).
Main applications:
1) Nano-particle size, shapes, distribution听and polydispersity analyses.
2)听Three-dimensional protein molecule structure analyses (folding and unfolding).
3)听Identification of molecular assembly or disassembly.
4)听Colloids, metals, cement, oil, polymers, plastics, foods and pharmaceuticals.
Sample Preparation听
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/脜)
Silver Behenate听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听the golden standard that one would hope for because:听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%.听Neverheless a Silver Behenate sample, when regularly refreshed听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.
Specification
路听听听听听听听High Brilliance Microfocus Source
路听听听听听听听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.
路听听听听听听听Fully Evacuated Flight Path听for minimal scattering
路听听听听听听听On-axis sample Viewer
路听听听听听听听Large sample area听with space for potentially complicated sample environments
路听听听听听听听Motorized sample stage听with XY motion (for sample placement and multiple sample mounting) combined with a 螛-stage for standard SAXs and GISAXs
路听听听听听听听Pilatus 300K Solid-State Photon-Counting Detector听providing ultimate noise reduction, high dynamic range, and radiation hardness for long-term maintenance free operation.
路听听听听听听听Proprietary Noise-reduction Algorithm听to remove cosmic background
路听听听听听听听Multiple Insertable Beam stops听for different configurations
路听听听听听听听Full 3-axis Detector Motion听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
路听听听听听听听Real-time automated Data-Reduction
Scientific Highlights:
To be updated
