Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (12): 120102-120102.doi: 10.11889/j.0253-3219.2018.hjs.41.120102


SAXS measurements of polymeric sub-nanometer pores

DING Siyuan1, WANG Xue1, WANG Mao1, SHEN Wenhao1, LIU Feng1,2, WANG Yugang1   

  1. 1 State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;
    2 Center for Quantitative Biology, Peking University, Beijing 100871, China
  • Received:2018-07-20 Revised:2018-09-11 Online:2018-12-10 Published:2018-12-13
  • Supported by:

    Supported by National Natural Science Foundation of China (No.11335003)


[Background] Recent researches focusing on seeking excellent ionic permeability and selectivity in a nanoscale or even sub-nanometer scale have made great progress. Notably, we have established a new technique to fabricate uniform-sized nanopores in polyethylene terephthalate (PET) films, which shows great performance in ion transport.[Purpose] This study aims to apply small angle X-ray scattering (SAXS) measurement to investigate the track structures in different fabrication stages.[Methods] Nonporous membranes were fabricated by irradiating PET films with 9.5 MeV·u-1 Bi in the range of 5×109 cm-2 to 5×1011 cm-2 followed by UV treatment and adequate infiltration. Structures of fabricated samples were measured at SAXS beamline of Shanghai Synchrotron Radiation Facility (SSRF) to obtain scattering spectra. Modified hard cylinder model and core shell model were employed to fit and analyze scattering spectra of samples in and after all fabrication procedures.[Results] The fitting results showed that the nanopore in the final fabrication stage has a fine structure of 0.5~0.6 nm and a shell of 7~8 nm in radius.[Conclusion] The SAXS techniques can be used to obtain the structure information of polymeric sub-nanometer pores.

Key words: SAXS, Nanopores, Ion irradiation, PET

CLC Number: 

  • TL99