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Bi2O3/Gd2O3 Meta-Aerogel with Leaf-Inspired Nanotrap Array Enables Efficient X-Ray Absorption
Li Xu1, Junqi Zhao1, Liqian Huang1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai 201620, China.
Researchers developed ultralight, superelastic nanofibrous bismuth oxide/gadolinium oxide meta-aerogels (BGAs) for advanced X-ray shielding. These materials offer superior X-ray absorption across a wide energy range, overcoming limitations of traditional lead-based shields.
Area of Science:
- Materials Science
- Nanotechnology
- Medical Physics
Background:
- Growing X-ray utilization necessitates improved shielding materials.
- Current lead-based shields have limited absorption ranges, high density, and rigidity.
- Biomimicry of natural light-absorbing structures offers inspiration for novel material design.
Purpose of the Study:
- To engineer ultralight and superelastic nanofibrous meta-aerogels for efficient X-ray shielding.
- To develop advanced X-ray protective materials with enhanced absorption capabilities.
- To address limitations of existing X-ray shielding technologies.
Main Methods:
- Fabrication of ultralight and superelastic nanofibrous Bi2O3/Gd2O3 meta-aerogels (BGAs).
- Engineering of 3D confined assembly of 1D Bi2O3 and Gd2O3 nanofibers.
- Creation of X-ray nanotrap arrays within the meta-aerogel structure.
Main Results:
- BGAs exhibit synergistic X-ray photon absorption across complementary energy ranges (16-90 keV).
- Achieved efficient X-ray shielding (60-83%) with ultralow density (10 mg cm-3).
- Demonstrated superelasticity, enabling flexible and durable X-ray protection.
Conclusions:
- Engineered BGAs represent a significant advancement in X-ray shielding materials.
- These meta-aerogels offer a promising alternative to conventional lead-based shielding.
- The developed materials pave the way for next-generation X-ray protective solutions.
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