摘要
提出一种新颖、可避免高温过程的大面积吸收光栅制作方法,使用钨纳米粒子作为X射线吸收材料,利用有机溶剂和乳化剂作为吸收材料的载体,在负压下将它们填充到周期为42μm、深度为150μm的光栅结构中。此外,与通过微铸造技术制作的相同结构铋块体吸收光栅相比较,得到的X射线投影吸收对比度表明,钨纳米颗粒对X射线吸收性能低约15%,但纳米颗粒填充法可显著降低吸收光栅的制作成本,并利于实现大面积制作。
A novel fabrication method of large-area absorption gratings was proposed to avoid the high temperature process.Tungsten nanoparticles were used as X-ray absorbing materials,and organic solvents and emulsifiers were used as carriers to bring these absorbing materials into grating structures with the period of 42μm and the depth of 150μm under a negative pressure.Moreover,by comparing X-ray absorbing grating of the bismuth-based bulk with that of the same structure fabricated by micro-casting technology,it is shown that the bismuth nanoparticles have about 15% decrease in X-ray absorbing.
作者
李乔飞
许桂雯
李冀
黄建衡
雷耀虎
LI Qiaofei;XU Guiwen;LI Ji;HUANG Jianheng;LEI Yaohu(Key Lab.of Optoelectronic Devices and Systems of the Ministry of Education and Guangdong Province,College of Physics and Optoelectronic Engin.,Shenzhen University,Shenzhen 518060,CHN)
出处
《半导体光电》
CAS
北大核心
2019年第6期786-788,890,共4页
Semiconductor Optoelectronics
基金
国家自然科学基金项目(61227802,61405120,61605119,61571305,11674232)
深圳科创委项目(JCYJ20170302142617703)
关键词
X射线
相衬成像
吸收光栅
纳米颗粒
钨
X-ray
phase contrast imaging
absorption grating
nanoparticles
tungsten
