Chemical Information of Chitosan-Based Complex Extracted from Coincidence Doppler Broadening Spectra

• Authors: Xingzhong Cao , Rui Xia , Jing Yang , Minfeng Zeng , Baoyi Wang , Runsheng Yu , Long Wei
• Languages of publication: EN

Abstracts

EN

In recent years, coincidence Doppler broadening (CDB) of annihilation radiation measurement on polymeric system has been attracting special attention because of its unique elemental sensitivities in comparison to the traditional Doppler broadening measurement. In the present study, chitosan-Fe₃O₄ nanocomposite (CS-Fe₃O₄) and copper-chitosan (Cu-CS) complexes were prepared through a simple casting method from aqueous solution. The inclusion of Fe₃O₄ nanoparticles in the chitosan matrix is confirmed by X-ray diffraction. In order to obtain data about atomic composition of the annihilation site in the CS composites, CDB measurements were carried out. The normalized CDB ratio curve, which is related to the ratio between the momentum density distribution for the studied samples and pure CS, was displayed to illustrate the variation of ion cores of different elements present in the chitosan matrix. Our result confirms a contribution of active group available in chitosan molecules to the features in the high-momentum region of the CDB ratio curve. The findings show that the local chemical environment of the annihilation site in chitosan-based complexes could be estimated by such positron annihilation spectroscopic investigation.

Keywords

EN

78.70.Bj; 64.70.km; 82.30.Gg

Discipline

• 82.30.Gg: Positronium chemistry(see also 36.10.Dr Positronium in atomic and molecular physics; 78.70.Bj Positron annihilation in interactions of particles and radiation with matter)
• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 64.70.km: Polymers

• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 132
• Issue: 5
• Pages: 1535-1537

Dates

published

2017-11

Contributors

author

Xingzhong Cao

• Multi-discipline Research Center, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China

author

Rui Xia

• Multi-discipline Research Center, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China

author

Jing Yang

• Department of Applied Physics, Xi'an University of Sciences and Technology, Xi'an 710054, China

author

Minfeng Zeng

• Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China

author

Baoyi Wang

• Multi-discipline Research Center, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China

author

Runsheng Yu

• Multi-discipline Research Center, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China

author

Long Wei

• Multi-discipline Research Center, Institute of High Energy Physics, Chinese Academy of Sciences, No. 19 Yuquan Lu, Beijing 100049, China

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Identifiers

DOI

10.12693/APhysPolA.132.1535