The Dedicated BL23A SWAXS Endstation at the NSRRC
Structural Characterization with Soft matter and Nanomaterials





Since May 2009, a dedicated small/wide angle X-ray scattering (SWAXS) endstation located at the BL23A beamline has been opened to all NSRRC users. The SWAXS instrument aims for structural characterization of air-liquid interfaces, thin films, and solution and bulk specimens, covering the length scale from ~0.1 nm to ~300 nm and the research fields in soft matter, nanomaterials, and alloy.

The new BL23A SWAXS endstation is featured in simultaneous, time-resolved SAXS/WAXS with DSC, shear, or stretching device for polymers and liquid crystals. Solution SAXS for colloidal particles, proteins, and biomacromolecules can be conducted, with a 4-syringe stopped-flow system. With the double multilayer monochromator (DMM) mode for a high flux beam of ~1011 photons/s, scattering time resolution can be within a second for structural dynamics studies with polymer crystallization; with the double crystal monochromator (DCM) mode for a beam of an energy resolution of few eV, anomalous scattering is also available for multiphase nanoparticles, composites, unilamellar lipid vesicles, and alloys, containing elements of characteristic X-ray absorptions in the energy region between 5-23 keV. Grazing incidence SAXS/WAXS for polymer, lipid or nanoparticle thin films/monolayers on solid substrates can be performed. With a deflecting mirror for a precise bending of the X-ray beam downwards, GISAXS for nanostructures of monolayer/multilayer films formed at the air-liquid interface is possible.

For more information about the NSRRC BL23A SWAXS endstation, please check the BL23A directory in our website at
We cordially invite all interested NSRRC users sending your beamtime request proposals through our website. Due to the limited beamtime available, the beamtime proposals will be reviewed and the beamtime will be allocated by the NSRRC proposal review committee.
For beamtime proposal submission, please visit

For experimental strategy design and instrumentation, please contact the beamline scientists.

Dr. U-Ser Jeng (鄭有舜) at <> Tel: 03-578-0281 ext 7108

BL23A SWAXS endstation scientists:
1. Dr. Chun-Jen Su (蘇群仁) (beamline manager)<> ext 7205
2. Dr. Yi-Qi Yeh (葉奕琪) <>ext 7271
3. Mr. Wei-Ru Wu (吳瑋儒) <> ext 3290
4. Ms Kuei-Fen Liao (廖桂芬) <> ext 3294
for general information: 23A Endstation ext. 1231. Lab. ext. 3171.