What is the advantage of WAXS? Is it the same for single crystal diffraction?
Its wide angle x-ray scattering scan 10-90 deg. Its a ordinary x-ray diffraction. Other one small angle x- ray scattering its in transmission position. It scan with 0-5 deg.
Thank u Boopati, what is the difference between WAXS and single crystall difraction is it same or different.
Hi Kali
I would like to add:
With Small Angle X-Ray difracction (SAXS) you can study non homogeneous systems, where the non homogeneities have a size from a few to hundreds of Angstroms. For example pores in C or a dispersed second phase as crystals in a glass or glass in glass (phase separation). It is a condition that the electronic density of the matrix and the dispersed phase must be different, the larger the difference the larger the scattered intensity.
The angular dependence of the scattered intensity in WAXZ doesnt present sharp peaks as in WAXS. Nevertheless theer are softwares for analyzing the I vs theta results.
With WAXS you can do standard XRay diffraction of crystalline (periodic) structures where each peak corresponds to an interplanar distance.
Within published literature you will find plenty of examples.
Kali,Well, there is a lot of literature available on SAXS &WAXS but I think Paavo A Penttila explain the difference in a short and brief way.The SAXS or WAXS techniques, one can employ according to the application as Paavo's second paragraph it was mentioned. Generally they both are X-ray scattering techniques to study materials morphology (SAXS) and structure(WAXS)...........................................! If you are studying a crystalline material then its better to use waxs while for amorphous or semicrystalline materials like polymer matrix better to use SAXS technique................................ !
As an example, for Mesoporous silica nanoparticles containing SPIONs(Superparamagnetic Iron Oxide Nano particles ), the structure of SPIONs is confirmed by WAXS (8 sharp standard peaks between 10 to 80 deg ) and the Mesoporous silica state by SAXS( one semi-broad peak at 2 deg).
SAXS can be used to study the morphology, size and interactions of systems of interest in solution form. I am using SAXS to study Lysozyme in solution state.
The conformation of nanosheets within the polymer matrix
The intensity at low q values (SAXS) is dominated by the scattering of objects in the 1–100 nm range, and therefore can be used to probe the dispersion state of graphene in the nanocomposites On the other hand, the intensity at high q values (WAXS) is related to the sub-nanometer scale
v Wide angle x-ray scattering scan 10-90o. Its a ordinary x-ray diffraction. Small angle x- ray scattering (SAXS) scan with 0-5 o.
v Small Angle X-Ray diffraction (SAXS) is preferred for non homogeneous structure, WAXS XRay diffraction is preferred for crystalline (periodic) structures.
v Small Angle X-Ray diffraction (SAXS) is preferred for mesoscale structures (>2–50 nm)
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Material Characterization