To fabricate high performance Bi absorption gratings for use in X-ray differential phase-contrast imaging(DPCI),the micro-casting method was improved via surface modification.Bi_(2)O_(3)was used in place of SiO_(2)as ...To fabricate high performance Bi absorption gratings for use in X-ray differential phase-contrast imaging(DPCI),the micro-casting method was improved via surface modification.Bi_(2)O_(3)was used in place of SiO_(2)as an improved wetting layer.A scanning electron microscopy showed that a high filling-ratio analyzer grating with a period of3μm and a depth of 150μm was obtained.Furthermore,the superiority of the presented analyzer grating to the one fabricated using the traditional micro-casting method was revealed through a comparison of moirépatterns.These tests demonstrate an enhancement to the micro-casting method for the fabrication of absorption gratings.展开更多
基金National Special Foundation of China for Major Science Instrument(61227802)National Natural Science Foundation of China(61405120)
文摘To fabricate high performance Bi absorption gratings for use in X-ray differential phase-contrast imaging(DPCI),the micro-casting method was improved via surface modification.Bi_(2)O_(3)was used in place of SiO_(2)as an improved wetting layer.A scanning electron microscopy showed that a high filling-ratio analyzer grating with a period of3μm and a depth of 150μm was obtained.Furthermore,the superiority of the presented analyzer grating to the one fabricated using the traditional micro-casting method was revealed through a comparison of moirépatterns.These tests demonstrate an enhancement to the micro-casting method for the fabrication of absorption gratings.
