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Detection and analysis of very weak and broad signals in Bombyx mori silk fibroin by 129Xe hyper-CEST subtraction spectroscopy as evidence for the tiny dimension of void space in polymer
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DOI：10.1016/j.cplett.2026.142849.png)
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Abstract
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• Sensitivity enhanced 129Xe NMR based on chemical exchange saturation transfer. • Application of a lot of saturation pulses to make the saturation transfer remarkable. • Hyperpolarized 129Xe NMR stability enhanced by subtraction spectroscopy. • Very weak and broad 129Xe NMR signal buried under baseline detected. • Tiny void space, free volume in polymer, evidenced in silk fibroin sponge.
Keywords:
129Xe NMR
hyper-CEST
subtraction spectroscopy
silk fibroin
void space
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3.1
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1.0K
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4.6W
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