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Bio-nano interaction of proteins adsorbed on single-walled carbon nanotubes |
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| Authors: | Jun Zhong Li Song Jie Meng Wangsheng Chu Yi Luo Augusto Marcelli Ziyu Wu |
| Affiliation: | a Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China b Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China c Institute of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China d Theoretical Chemistry, Royal Institute of Technology, Alba Nova, S-106 91 Stockholm, Sweden e Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA f Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, P.O. Box 13, 00044 Frascati, Italy g National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China h Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: | We applied X-ray absorption near edge structure (XANES) spectroscopy to investigate the adsorption of proteins onto single-walled carbon nanotubes (SWCNTs). Specific XANES spectral features such as peptide C O bonds in proteins were recognized and found to be affected by the corresponding aromatic structure of SWCNTs. Experimental data combined with first-principle calculation of the investigated nano-complex allow the understanding of adsorption mechanism and reveal that an interface interaction occurs leading to precise structural distortions of proteins. The study also demonstrates that XANES is a powerful tool to characterize structural details of proteins at the interface of complex systems. |
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