My Ph. D. work is currently supervised by Prof. Shen YE.
I am concentrating my study on the interaction between endocrine disrupter and living body. Bisphenol A (BPA) is considered as an endocrine disrupter (an environmental hormone) which can disturb the hormone balance in living body. In my present work, BPA absorption on a number of poly(acrylate) thin films, such as poly(2-methoxyethyl acrylate) (PMEA), poly(ethyl acrylate) (PEA), poly(n-butyl methacrylate) (PBMA), and poly(methyl methacrylate) (PMMA), have been systematically and quantitatively investigated by QCM and IRRAS measurements. In these polymers, PMEA shows excellent blood compatibility and is expected to be one of the promising biomaterials, and it is found that BPA can heavily absorb in PMEA. By optimizing experimental conditions for the QCM electrode modified by PMEA thin film, detection limitation of ca. 1 ppb for BPA can be realized by the in situ QCM measurement. The detailed results were shown in Reference 6. Furthermore, the interfacial structural information of poly(acrylate) thin film has been characterized by interface-sensitive vibrational spectroscopy, Sum Frequency Generation (SFG) before and after BPA absorption (Reference 7 and 8)
On the other hand, I also investigated the surface structure of the self-assembled monolayers (SAMs) of alkanethiol on a compound semiconductor GaAs surface in detail by contact angle and angle-resolved XPS measurements (Reference 9).
I am carrying out the detail investigation of the surface structure on the polymer interface and polymer blends by vibrational spectroscopy (SFG and IRRAS method), Differential Scanning Calorimetry (DSC).
1. Surface Enhanced Resonance Raman Spectroscopy of R6G Adsorbed on Silver Electrode in Lithium Batteries, Guifeng Li, H. Li, Y. Mo, X. Huang, L. Chen, Chem. Phys. Lett. 2000,330, 249-254
2. Further Identification to the SEI Film on Ag electrode in Lithium Batteries by Surface Enhanced Raman Scattering (SERS), Guifeng Li, H. Li, Y. Mo, X. Huang, L. Chen, J. Power Sources 2002, 104, 190-194
3. Surface Enhanced Raman Scattering (SERS) of Thiourea adsorb on the plated silver surface, Guifeng Li, T. Yang, Q. Xing, N. Pei, Y. Mo, Chinese Journal of light scattering 1999, 11, 279-282
4. Study on anode materials and SEI film of Lithium battery, Yujun Mo, Guifeng Li, H. Li, N. Pei, X. Huang, L. Chen, J. Henan University 2002, 32, 8-11
5. Surface Enhanced Raman Scattering (SERS) spectra of Thiourea in acid aqueous solution, T. Yang, Y. Mo, Guifeng Li, N. Pei, Spectroscopy and spectral Analysis 1999, 19, 538-541
6. Quartz Crystal Microbalance and Infrared Reflection Absorption Spectroscopy Characterization of Bisphenol A Absorption in the Poly(acrylate) Thin Films, Guifeng Li, S. Morita, S. Ye, M. Tanaka and M. Osawa, Anal. Chem. (in press)
7. Effect of Glass Transition Temperature (Tg) on the Absorption of Bisphenol A in Poly(acrylate)s Thin films, S. Morita, S. Ye, Guifeng Li and M. Osawa, Vibrational. Spectroscopy, (in press)
8. Structural Changes in Poly(2-methoxyethyl acrylate) Thin Films Induced by Absorption of Bisphenol A. An Infrared and Sum Frequency Generation (SFG) Study, S. Ye, S. Morita, Guifeng Li, H. Noda, M. Tanaka, K. Uosaki and M. Osawa, Macromolecules, 2003, 36, 5694 -5703
9. Characterization of self-assembled monolayers of alkanethiol on GaAs surface by contact angle and angle-resolved XPS measurements, S. Ye, Guifeng Li, H. Noda, K. Uosaki and M. Osawa, Surf. Sci. , 2003, 529, 163-170
Title
of My Master Thesis:
Study on Solid Electrolyte Interface Film (SEI film) And Relative Properties of Anode Materials for Lithium Ion Batteries.