Hongfei Wang: Professor

                                    Hongfei Group

Research Interests

Physical chemistry of interfacial phenomena：Our main focus is to research physical chemistry of interfacial phenomena with linear and nonlinear optical method. Using Second Harmonic Generation (SHG) and Sum Frequency Generation (SFG), we study on the molecular structure and dynamic processes on both smooth and rough surfaces, especially micro-particla interfaces. Second-order nonlinear optical methods has been developed since early 1980's. With their sub-monolayer sensitivity and sueface specificity, SHG and SFG allow us to study the spectroscopy and dynamics of interfaces at detailed molecular level. The discovery of SHG and SFG enhancement from micro-partical interfaces in 1996 has made great progresses on colloidal surfaces studies, which are ubiquitous in biological, environmental, and chemical industrial and medicinal application systems.

Spectroscopy and ultrafast dynamics at interfaces and in solution: With the SHG and SFG, we study structural and dynamic properties at various interfaces with molecular detail. SFG is used to study chiral molecules in the solution phase to understand their optical properties, to identify their energy state, and to understand detail interactions between chiral molecules and their environment.

Molecule dynamics in the solution and gaseous phases: We are interesting in the elemantry reaction process in the solution and gaseous phases. Using complementary technoiques of time-resolved spectroscopy, such as transient absorption, fluorescence depletion, and mass spectroscopy methods, we study inter- and intra- molecular dynamic processes, such as energy tranfer, charge tranfer, molecular dissociation, solvent effects, etc in the gaseous and solution phases.

List of Publication

1. Second Harmonic Generation from the surface of centrosymmetric particles in bulk solution, Hong-fei Wang, Elsa.C.Y. Yan, Eric Borguet，and K.B. Eisenthal, Chem. Phys. Letts. 259, 15-20, 1996; (334kb .pdf download)
2. The polarity of air/water Interface by Second Harmonic Generation Spectroscopy, Hong-fei Wang, E. Borguet，and K.B. Eisenthal; J. Phys. Chem. A 101, 713-8, 1997; (240kb .pdf download)
3. Generalized interface polarity scale based on Second Harmonic Spectroscopy, Hong-fei Wang, E. Borguet，and K.B. Eisenthal; J. Phys. Chem. B 102, 4927-32, 1998; (86kb .pdf download)　
4. Molecules at liquid and solid surfaces， Hong-fei Wang, E. Borguet, E.C.Y. Yan, D. Zhang, J. Gutow, and K.B. Eisenthal, Langmuir 14,1472-7, 1998; (85kb .pdf download)
5. Energetics and population of molecules at microscopic liquid and solid surfaces, Hong-fei Wang, Elsa C.Y. Yan, Yan Liu，and K.B. Eisenthal; J. Phys. Chem. B 102, 4446-50, 1998; (130kb .pdf download)
6. In-Situ probe of surfactant adsorption on the surface of micro particles buried in colloid solution by a non-linear optical technique, Hong-fei Wang, T. Troxler, An-gong Yeh and Hai-lung Dai, Langmuir 16,2475, 2000;(87kb .pdf download)
7. Effects of Monolayer Density and Bulk Ionic Strength on Acid-Base Equilibria at the Air/Water Interface,Hongfei Wang, Xiaolin Zhao, and K. B. Eisenthal, J. Phys. Chem. B 104, 8855-8861,2000;(130kb .pdf download)
8. In-situ Spectroscopic Probe of Solid & Liquid Interfaces in Colloidal Solutions, Hong-fei Wang, p309-311, OCPA 2000: Proceedings of the Third Joint Meeting of Chinese Physicists Worldwide-Commemorating the Past and Looking Towards the Future, (World Scientific 2002, ISBN 981-238-122-8). (136kb .pdf download)
9. Rong Lü, Yi Rao, Wen-kai Zhang, and Hong-fei Wang, Phase measurement in nonlinear optics of molecules at air/water interface with femtosecond laser pulses, Proceedings of the SPIE Conference on Nonlinear Spectroscopy, No.4812-15, p115, 2002. (115kb .pdf download)
10. Quantitative analysis of orientational order in the molecular monolayer by surface second harmonic generation, Yi Rao, Yi-song Tao, and Hong-fei Wang*, J. Chem. Phys. 119, 5226-5236, 2003;(222kb .pdf download) (First Major Independent Paper)
11. Rotational symmetry and absolute sign of second-order susceptibility of a-quartz, Lu Rong, Wang Hong-fei*, Chin. Phys. Lett. 20(8), 1269-1271, 2003;(239kb .pdf download)
12. Novel method for accurate determination of the orientational angle of interfacial chemical groups, Lu Rong, Gan Wei, and Hong-fei Wang*, Chin. Sci. Bull. 48(20), 2183-2187, 2003. (199kb .pdf download) (Very Useful Technique) With erratum at Chin. Sci. Bull., 49(9), 899, 2004.(34kb .pdf download)
13. 一种测量界面分子基团取向的新方法, 吕荣, 干为, 王鸿飞*,《科学通报》 48(15), 1628-1632, 2003; (529kb .pdf download in Chinese)
14. New Phenomena in Phase Transition and Accurate Determination of Orientational Order in Langmuir Monolayer, Yi Rao, Yi-Song Tao, De-sheng Zheng, and Hong-fei Wang*, Proceedings of the SPIE Conference on Physical Chemistry of Interfaces and Namomaterials, No. 5223-38, 2003.(171kb .pdf download)
15. Observation of the Direct S2 to S0 Two-Photon Fluorescence between 370-480nm and the Hyperpolarizability of Crystal Violet (CV) from Spectrally Resolved Hyper-Rayleigh Scattering Measurement, Yi Rao, Xun-min Guo, Yi-Song Tao, and Hong-fei Wang*, J. Phys. Chem. A,108,7977-7982,2004. (Richard Bersohn Festschrift.).(100kb .pdf download)
16. Vibrational Polarization Spectroscopy of CH Stretching Modes of Methylene Group at the Vapour/Liquid Interfaces with Sum Frequency Generation, Rong Lu, Wei Gan, Bao-hua Wu, Hua Chen, and Hong-fei Wang*, J. Phys. Chem. B,108,7297-7306, 2004.(141kb .pdf download) And Supporting materials.(116kb .pdf download) (Our most cited paper so far.)

    Special Note: Ethical Issue

    It has to be pointed out that there is a recent Accelerated Article published in Analytical Chemistry titled 'Polarization Mapping: A Method To Improve Sum Frequency Generation Spectral Analysis' (Ana. Chem., 76, 2159-2167, 2004), which is closely related to this work, but without giving proper references to our related works.

    MORE...

17. A Simplified Formulation of Linear and Nonlinear Spectroscopy of Ordered Molecular Systems, Hong-fei Wang, Chinese J. Chem. Phys., 17, 362-368, 2004.(Preprint file avalaible 156 kb .pdf download -In English)
18. Determination of Structure and Energetics for Gibbs Surface Adsorption Layers of Binary Liquid Mixture 1. Acetone + Water, Hua Chen, Wei Gan, Bao-hua Wu, Dan Wu, Yuan Guo, and Hong-fei Wang*, J. Phys. Chem. B, 109, 8053-8063, 2005. (170kb .pdf download)
19. Determination of Structure and Energetics for Gibbs Surface Adsorption Layers of Binary Liquid Mixture 1. Methanol + Water, Hua Chen, Wei Gan, Rong Lu, Yuan Guo, and Hong-fei Wang*, J. Phys. Chem. B, 109, 8064-8075, 2005. (170kb .pdf download).
20. Accuracy and sensitivity of determining molecular orientation at interfaces using sum frequency generation vibrational spectroscopy, Wei Gan, Bao-hua Wu, Hua Chen, Yuan Guo, Hong-fei Wang*, Chem. Phys. Letts., 406, 467-473, 2005. (210kb .pdf download).
21. Determination of the two methyl group orientations at vapor/acetone interface with polarization null angle method in SFG vibrational spectroscopy, Hua Chen, Wei Gan, Bao-hua Wu, Dan Wu, Zhen Zhang, Hong-fei Wang*, Chem. Phys. Letts., 408, 284-289, 2005. (200kb .pdf download) And Supporting materials.(97kb .pdf download).
22. Quantitative spectral and orientational analysis in surface Sum Frequency Generation Vibrational Spectroscopy (SFG-VS), Hong-fei Wang*, Wei Gan, Rong Lu, Yi Rao, Bao-hua Wu, Int. Rev. Phy. Chem., 24, 191-256, 2005.(.pdf download available) Correction for two figures.( .pdf downloan 181kb).
23. C-H Stretching Vibrations of Methyl, Methylene and Methine Groups at the Vapor/Alcohol (n=1～8) Interfaces, Rong Lu, Wei Gan, Bao-hua Wu, Zhen Zhang, Yuan Guo and Hong-fei Wang*, J. Phys. Chem. B, 109, 14118-14129, 2005.(195kb .pdf download). And Supporting materials.(275kb .pdf download).
24. Reconsideration of Second Harmonic Generation from Isotropic Liquid Interface: Broken Kleinman Symmetry of neat air/water interface from Dipolar Contribution, Wen-kai Zhang, De-sheng Zheng, Yan-yan Xu, Hong-tao Bian, Yuan Guo, and Hong-fei Wang*, J. Chem. Phys.,123, 224713(11 pages), 2005. (139kb .pdf download).
25. Polarization and Experimental Configuration Analysis of Sum Frequency Generation Vibrational Spectra, Structure and Orientational Motion of Air/Water Interface, Wei Gan, Dan Wu, Zhen Zhang, Ran-ran Feng, and Hong-fei Wang*, J. Chem. Phys.,124, 114705(15 pages), 2006. (286kb .pdf download).
26. Orientation and Motion of Water Molecules at Air/Water Interfaces, Wei Gan, Dan Wu, Zhen Zhang, Ran-ran Feng, and Hong-fei Wang*, Chin. J. Chem. Phys. 19,20-24,2006. (369kb .pdf download).
27. Identification of Overlapping Features in the Sum Frequency Generation Vibrational Spectra of Air/Ethanol Interface, Wei Gan, Zhen Zhang, Ran-ran Feng and Hong-fei Wang*, Chem. Phys. Letts. 423, 261-265,2006. (238kb  .pdf  download).
28. Quantitative Interpretation of Polarization SFG Vibrational Spectra of Air/Methanol Interface, Hui Wu, Wen-kai Zhang, Wei Gan, Zhi-feng Cui*, and Hong-fei Wang*, Chin. J. Chem. Phys., 19, 187-189, 2006.(160kb  .pdf  download)
29. Quantitative Measurement and Interpretation of Optical Second Harmonic Generation from Molecular Interfaces, Wen-kai Zhang, Hong-fei Wang*, and De-sheng Zheng, Phys. Chem. Chem. Phys., 8, 4041-4052, 2006. Invited Review Article, Published as PCCP Hot Article on web on August 1 2006. (711kb  .pdf  download) DOI: 10.1039/b608005g
30. An Empirical Approach to the Bond Additivity Model in Quantitative Interpretation of Sum Frequency Generation Vibrational Spectra, Hui Wu, Wen-kai Zhang, Wei Gan, Zhi-feng Cui, and Hong-fei Wang*, J. Chem. Phys., 125, 133203, 2006.(233kb  .pdf  download)
31. Adsorption at a Carbon Black Microparticle Surface in Aqueous Colloids Probed by Optical Second-Harmonic Generation, Hong-fei Wang, Thomas Troxler, An-gong Yeh, and Hai-lung Dai*, J. Phys. Chem. C, 111 8705-8715, 2007.(192kb  .pdf  download)
32. Vibrational Spectra and Molecular Orientation with Experimental Configuration Analysis in Surface Sum Frequency Generation (SFG), Wei Gan, Bao-hua Wu, Zhen Zhang, Yuan Guo, and Hong-fei Wang*, J. Phys. Chem. C, 111,8716-8725, 2007. (214kb  .pdf  download)
33. Spectral Interference and Molecular Conformation at Liquid Interface with Sum Frequency Generation Vibrational Spectroscopy (SFG-VS),Wei Gan, Zhen Zhang, Ran-ran Feng, and Hong-fei Wang*, J. Phys. Chem. C, 111, 8726-8738, 2007. (242kb  .pdf  download)
34. Second Harmonic Generation as a Probe of Multisite Adsorption at Solid-Liquid Interfaces
    of Aqueous Colloid Suspensions, R. Kramer Campen, De-sheng Zheng, Hongfei Wang, and Eric Borguet*, J. Phys. Chem. C, 111, 8805-8813, 2007. (194kb  .pdf  download)
35. Experimental Observables and Macroscopic Susceptibility/Microscopic Polarizability Tensors for Third and Fourth-Order Nonlinear Spectroscopy of Ordered Molecular System, Yuan Wang, Zhi-feng Cui*, and Hong-fei Wang*, Chin. J. Chem. Phys., 20, 449-460, 2007.(192kb  .pdf  download) And Supporting materials.(318kb .pdf download).
36. Insight into the origin of the thermosensitivity of poly[2-(dimethylamino)ethyl methacrylate], Guangming Liu, Dan Wu, Chengcheng Ma, Guangzhao Zhang, Hong-fei Wang HF, Shihe Yang*, ChemPhysChem, 8, 2254-2259, 2007.(431kb .pdf download)
37. Solvent effect on the film formation and the stability of the surface properties of poly(methyl methacrylate) end-capped with fluorinated units, Xiaofang Wang, Huagang Ni, Dongwu Xue, Xinping Wang*, Ran-ran Feng, Hong-fei Wang, J. Coll. Interface Sci., 321, 373-383, 2008.(987kb .pdf download)
38. Increased interfacial thickness of the NaF, NaCl and NaBr salt aqueous solutions probed with non-resonant surface second harmonic generation (SHG), Hong-tao Bian, Ran-ran Feng, Yan-yan Xu, Yuan Guo, Hong-fei Wang*, Phys. Chem. Chem. Phys., 10, 4920-4931, 2008.(708kb .pdf download)
39. Vibrational Spectra and Adsorption of Trisiloxane Superspreading Surfactant at Air/Water Interface Studied with Sum Frequency Generation Vibrational Spectroscopy, Jun Feng, Dan Wu, Jia Wen, Shi-lin Liu, Hong-fei Wang*, Chin. J. Chem. Phys., 21, 314-323, 2008.(309kb  .pdf  download)
40. Microscopic molecular optics theory of surface second harmonic generation and sum-frequency generation spectroscopy based on the discrete dipole lattice model, Hong-tao Bian, Ran-ran Feng, Yan-yan Xu, Yuan Guo, Hong-fei Wang*, Int. Rev. Phy. Chem., 27, 629-664, 2008.(296kb .pdf Author's Copy download)
    (Author Posting. Copyright 2008 Taylor & Francis. This is the author's version of the work. It is posted here by permission of 'Copyright Holder' for personal use, not for redistribution. The definitive version was published in International Reviews in Physical Chemistry, Volume 27 Issue 4, October 2008. (http://dx.doi.org/10.1080/01442350802343981))
41. Water penetration/accommodation and phase behaviour of the neutral langmuir monolayer at the air/water interface probed with sum frequency generation vibrational spectroscopy (SFG-VS), Zhen Zhang, De-sheng Zheng, Yuan Guo and Hong-fei Wang*, Phys. Chem. Chem. Phys., in press, 2008, DOI: 10.1039/b813187b.(Link: DOI:10.1039/b813187b)
    
    

Department Seminars

1. Department of Chemistry, Temple University, September 1, 2005
   Title: Quantitative Measurement of Structure and Energetics of Langmuir Films & Liquid Interfaces with Nonlinear Spectroscopy
   Host: Professor Eric Borguet
2. Department of Chemistry, University of Houston, September 6, 2005
   Title: Recent Quantitative Experimental Understanding of Nonlinear Spectroscopy, Structure and Dynamics of Liquid Interfaces
   Host: Professor Steven Baldelli
3. Department of Chemistry, Texas A&M University, September 8, 2005
   Title: Quantitative Sum Frequency Vibrational Spectroscopy, Structure and Energetics of Liquid and Liquid Mixture Interfaces
   Host: Professor Yi-qin Gao
   
4. Department of Chemistry, Columbia University, September 12, 2005
   Title: Structure & Dynamics of Langmuir Films & Liquid Interfaces
   Host: Professor Kenneth Eisenthal
5. Department of Chemistry, University of Pennsylvania, September 15, 2005
   Title: Quantitative Surface Nonlinear Spectroscopy, Phase Transition of Langmuir Films, Structure & Energetics of Liquid Interfaces
   Host: Professor Hai-lung Dai
6. Department of Chemistry, University of California, Santa Barbara, September 22, 2005
   Title: Quantitative Measurement of Vibrational Spectra, Structure and Dynamics of Molecular Interfaces with Nonlinear Spectroscopy
   Host: Professor Alec Wodtke (PIRE-ECCI Seminar)
7. Department of Chemical Engineering, Johns Hopkins University, March 15, 2006
   Title: Quantitative Measurement of Vibrational Spectra, Structure and Dynamics of Molecular Interfaces with Nonlinear Spectroscopy
   Host: Professor David Gracias
   
8. Pacific Northwest National Laboratory (PNNL), Department of Energy, Richland, Washington, U.S.A., March 20, 2006
   Title: Nonlinear Spectroscopy, Phase Transition, Structure & Energetics of Langmuir Films & Liquid Interfaces
   Host: Dr. Wayne Hess (Director, Chemical Structure & Dynamics Group, Chemical & Materials Sciences Division,Fundamental Science Directorate)
9. Deapartment of Chemistry, Emory University, March 30, 2006
   Title: Quantitative Measurement of Vibrational Spectra, Structure and Dynamics of Molecular Interfaces with Nonlinear Spectroscopy
   Host: Professor Tim Tianquan Lian
10. Pacific Northwest National Laboratory (PNNL), Department of Energy, Richland, Washington, U.S.A., August 17, 2007
    Title: New Opportunities in Interface Studies with Nonlinear Spectroscopy
    Host: Dr. Bruce Garrett (Director, Chemical & Materials Sciences Division,Fundamental Science Directorate)
11. Deapartment of Chemistry, Pennsylvania State University, August 27, 2007
    Title: New Opportunities in Interface Studies with Nonlinear Spectroscopy
    Host: Professor Paul Weiss and Professor David Allara
12. Deapartment of Chemistry, Temple University, August 30, 2007
    Title: New Opportunities in Interface Studies with Nonlinear Spectroscopy
    Host: Professor Eric Borguet and Professor Hai-lung Dai
13. Department of Chemistry, Columbia University, September 4, 2007
    Title: Some New Nonlinear Spectroscopic Findings of the Aqueous Interfaces
    Host: Professor Kenneth Eisenthal

Conference: Talks

1. Laser study of molecular at liquid and solid interfaces, K.B. Eisenthal, PHYS0287, 1997 214th American Chemical Society National Meeting at Las Vegas, U.S.A., invited plenary talk of Professor K.B. Eisenthal given by Hong-fei Wang;(45 min.)
   
2. In-situ Spectroscopic Probe of Solid & Liquid Interfaces in Colloidal Solutions, Hong-fei Wang, AMO5(H3)-2, P45, The Third Joint Meeting of Chinese Physicists Worldwide-role of Physics in the new Millenium: Research, Education & Society; HongKong, July 31-August 4,2000. (Invited talk 25 min.).
   
3. In-situ Photonic Probe of Adsorbates on Some Colloidal Interfaces, Hong-fei Wang, 90007895; The 2000 International Chemical Congress of Pacific Basin Societies, Honolulu, Hawaii, USA, December 14-19,2000.（Invited talk 20 min.）
   
4. In-situ, Fast, Simple Analytical Technique Probing Molecular Adsorption and Orientation at Carbon Black Powder Surfaces in Aqueous Solution, Hongfei Wang, 75th Colloid and Surface Science Symposium, Pittsburgh, PA, USA, June 10-13,2001.(Oral 20 min.)。
   
5. Dissociation Processes of Polyatomic Molecular Ions in Intense Laser Field, Hong-Fei Wang, The Second Asian Conference on Ultrafast Phenomena, January 25-26, 2002，Takigawa Memorial Hall, Kobe, Japan. (Invited talk)。
   
6. Phase measurement in nonlinear optics of molecules at air/water interface with femtosecond laser pulses，Rong Lü, Yi Rao, Wen-kai Zhang, and Hong-fei Wang, SPIE Conference on Nonlinear Spectroscopy, July 7-11, 2002, Seattle, WA, USA.（Oral）。
   
7. New Phenomena in Langmuir monolayer phase transition at air/water interface by in-situ second harmonic generation measurement，Yi Rao, Xun-min Guo, Wen-kai Zhang, Rong Lv, Cong-yun Shi, Hong-fei Wang, ACS Symposium on Dynamics at Interfaces, 224th ACS National Meeting, Boston, MA (August 18-22, 2002).(Oral)
   
8. Head and Tail Phase Transitions and Orientational Order in Langmuir Monolayers at Air/water Interface Measured by Surface Second Harmonic Generation (SSHG), Yi Rao, Xun-min Guo, Hong-fei Wang, International Yangtze Conference of Fluids & Interfaces，Nanjing-Three Gorges-Chongqing, China,(Oct. 12-18,2002). (Oral)
   
9. New Phenomena in Phase Transition and Accurate Determination of Orientational Order in Langmuir Monolayer, Yi Rao, Yi-Song Tao, De-sheng Zheng, and Hong-fei Wang*, SPIE Conference on Physical Chemistry of Interfaces and Namomaterials, Aug. 3-8, 2003, San Diego, CA, USA. (Invited talk)。
   
10. Progresses of Spectroscopy and Dynamics in Interface and film studies with Non-linear Optics, Hong-fei Wang*, 8th National Conference of chemical dynamics, Chinese Chemical Society, August 8-12, 2003, Lushan, Jiangxi, China. (Plenary Talk).
    
11. Polar Orientational Order and Optical Dielectric Constant in Closely Packed Langmuir Monolayer, Yi Rao, De-sheng Zheng, Yi-song Tao and Hong-fei Wang*, The Tenth International Conference on Organized Molecular Films (LB10), Oct. 5-10, 2003, Beijing, China. (Oral)
12. Accurate Determination of the Orientation Order and Phase Transition in Molecular Layer with Nonlinear Optical Technique, Yi Rao, Yi-song Tao, De-sheng Zheng, Hong-fei Wang*, OCPA2004: 4th Joint Meeting of Chinese Physicists World-Wide International Conference on Physics Education & Frontier Research, June 28 - July 1, 2004, Shanghai, China. (Invited).
13. Vibrational Spectroscopy and Interactions of Molecules at Liquid Interfaces, Hong-fei Wang, DICP Symposium on Molecular Dynamics, July 21-23, Dalian, China.
    31. Vibrational Spectroscopy of Molecules at Liquid Interfaces, Hong-fei Wang, 2nd Chinese-French Workshop on Atomic and Molecular Dynamics, September 12-14, 2004, Beijing, China. (Oral)
14. Latest Advances of Sum Frequency Generation Vibrational Spectroscopy (SFG-VS) and its Application in Colloidal and Interfacial Chemistry, Hong-fei Wang*, Hua Chen, Wei Gan, and Bao-hua Wu, 10th National Conference of Colloidal and Surface Chemistry, Chinese Chemical Society, September 13-16, 2004, Xi'an China. (Plenary Talk).
15. Vapor/liquid interface spectroscopy and dynamics studied with second order nonlinear optical techniques, Hong-fei Wang, 12th National Conference of Laser Physics, October 25-30, Lijiang, Yunan, China. (Oral)
16. Quantitative analysis of vibrational spectrum and orientational order in Sum Frequency Generation Vibrational Spectroscopy (SFG-VS) studies on molecular interfaces, Hong-fei Wang, ACS Symposium on Analytical and Biological Applications of Non-linear Optics, 230th ACS National Meeting, Washington D.C., (August 28-September 1, 2005). (Invited Talk).
17. Anti-parallel double-layer structure and energetics in the Gibbs adsorption layers at the vapor/aqueous solution interfaces, Hong-fei Wang, Hua Chen, Wei Gan, Bao-hua Wu, Zhen Zhang, ACS Symposium on Advances in Nanoscience and Nanotechnology: Symposium in Memory of Jim Schwarz, 230th ACS National Meeting, Washington D.C., (August 28-September 1, 2005). (Oral).
18. Vibrational Spectroscopy and Symmetry Specific Vibrational Energy Relaxation of Ethanol Molecule: A Study with Sum Frequency Generation and Photoacoustic Stimulated Raman Spectroscopy, Hong-fei Wang,Shi-lin Liu, Special Focus Topic: Chemical and Spectroscopic Applications of Nonlinear Optics, 2006 American Physical Society March Meeting, Baltimore, Maryland, U.S.A. (March 13-17, 2006). (Oral)。
    
19. Nonlinear spectroscopy of water molecules at the air/water and other interfaces, Hong-fei Wang, Wen-kai Zhang, Wei Gan, Hong-tao Bian, Yuan Guo, ACS Symposium on Spectroscopy at Interfaces, 231th ACS National Meeting, Atlanta, Georgia, U.S.A.(March 26-March 31, 2006). (邀请报告 40min.).
20. Some New Nonlinear Spectroscopic Findings of the Aqueous Interfaces, Hong-fei Wang, Ran-ran Feng, Zhen Zhang, Hong-tao Bian, Yuan Guo, ACS Symposium on Spectroscopy at Interfaces, 234th ACS National Meeting, Boston, MA, U.S.A.(August 19-August 23, 2007). (邀请报告 40min.).
    

International School: Lecturer

1. Three lectures on Nonlinear Spectroscopy of Water Surfaces, all lecture materials are in pdf format and they can be downloaded at the Spring College on Water in Physics, Chemistry and Biology, International Center for Theoretical Physics (ICTP), Trieste, Italy. April 10-20 Baltimore, Maryland, U.S.A. (March 13-17, 2006). Organizer: Directors: M.L. Klein, D.D. Klug, G. Scoles; ICTP Local Organizer: S. Scandolo.
   

National School: Lecturer

1. Three lectures on Physical Chemistry of Interfaces-Molecular Structure, Orientation and Spectroscopy, 2007 National Summer Graduate School on Physical Chemistry, University of Science and Technology of China, Hefei, Anhui Province, China. (July 15-August 5, 2007).

Professional Journal: Guest Editor

1. The "Kenneth B. Eisenthal Festschrift", the Journal of Physical Chemistry C, Vol. 111, Issue 25, 8699-8999, 2007. Together with Eric Borguet (Temple University), Tony F. Heinz (Columbia University), Mostafa El-Sayed (Georgia Institute of technology).

Conference: Organizer

1. Special Focus Topic: Chemical and Spectroscopic Applications of Nonlinear Optics, 2006 American Physical Society March Meeting, Baltimore, Maryland, U.S.A. (March 13-17, 2006). Co-Organizer: Nancy Levinger (Department of Chemistry, University of Colorado), Hong-fei Wang(Institute of Chemistry, Chinese Academy of Sciences).
   

Ph.D. Dissertation

• Title: Second Harmonic Generation Studies of Chemistry at Liquid Interfaces
  Author： Hong-fei Wang
  Advisor：Professor Kenneth B. Eisenthal
  Institution: Department of Chemistry, Columbia University
  Date of Defence: August 20, 1996
  
  Full text: (1299kb .pdf download)
  By Chapter： (Title pages: 145kb .pdf download)(Chapter I: 74kb .pdf download) (Chapter II: 271kb .pdf download) (Chapter III: 336kb .pdf download) (Chapter IV: 337kb .pdf download) (Chapter V: 169kb .pdf download)

Other writings and articles

1. Moderm sceince and the internet--How did all this start? (In Chinese 27 kb .pdf download)
2. Candle in the dark--science since 1000 A.D. and in the 20th century society.(In Chinese 103kb .pdf download)
3. Seeking, sometimes finding, that elusive chemistry, Nature, 412, p117, 2001.(57kb .pdf download)