Gualtieri, E.J.; Haupert, L.M.; Simpson, G.J., Interpreting nonlinear optics of biopolymers: Finding a hook. Chemical Physics Letters 2008, 465, 167-174.

Wampler, R.D.; Kissick, D.J.; Dehen, C. J., Gualtieri, E.J.; Grey, J.L.; Wang, H.; Thompson, D.H.; Cheng, J.; Simpson, G.J., Selective detection of protein crystals by second harmonic microscopy. Journal of American Chemical Society 2008, 130, 14076-14077.

Wampler, R. D.; Begue, N. J.; Simpson, G. J., Molecular design strategies for optimizing the nonlinear optical properties of chiral crystals. Crystal Growth & Design 2008, 8, (8), 2589-2594.

Wanapun, D.; Wampler, R. D.; Begue, N. J.; Simpson, G. J., Polarization-dependent two-photon absorption for the determination of protein secondary structure: A theoretical study. Chemical Physics Letters 2008, 455, (1-3), 6-12.

Cheng, X. G.; Gurkan, U. A.; Dehen, C. J.; Tate, M. P.; Hillhouse, H. W.; Simpson, G. J.; Akkus, O., An electrochemical fabrication process for the assembly of anisotropically oriented collagen bundles. Biomaterials 2008, 29, (22), 3278-3288.

Davis, R. P.; Moad, A. J.; Goeken, G. S.; Wampler, R. D.; Simpson, G. J., Selection rules and symmetry relations for four-wave mixing measurements of uniaxial assemblies. Journal of Physical Chemistry B 2008, 112, (18), 5834-5848.

Halter, M.; Liao, Y.; Plocinik, R. M.; Coffey, D. C.; Bhattacharjee, S.; Mazur, U.; Simpson, G. J.; Robinson, B. H.; Keller, S. L., Molecular self-assembly of mixed high-beta zwitterionic and neutral ground-state NLO chromophores. Chemistry of Materials 2008, 20, (5), 1778-1787.

Hilton, A. M.; Jacobson, K. W.; Lynch, B. P.; Simpson, G. J., Enhanced local oxidation of silicon using a conducting atomic force microscope in water. Journal of Vacuum Science & Technology B 2008, 26, (1), 47-51.

Zhu, H.; Coleman, D. M.; Dehen, C. J.; Geisler, I. M.; Zemlyanov, D.; Chmielewski, J.; Simpson, G. J.; Wei, A., Assembly of dithiocarbamaten-anchored monolayers on gold surfaces in aqueous solutions. Langmuir 2008, 24, (16), 8660-8666.

Wampler, R. D.; Moad, A. J.; Moad, C. W.; Heiland, R.; Simpson, G. J., Visual methods for interpreting optical nonlinearity at the molecular level. Accounts of Chemical Research 2007, 40, (10), 953-960.

Moad, A. J.; Moad, C. W.; Perry, J. M.; Wampler, R. D.; Goeken, G. S.; Begue, N. J.; Shen, T.; Heiland, R.; Simpson, G. J., NLOPredict: Visualization and data analysis software for nonlinear optics. Journal of Computational Chemistry 2007, 28, (12), 1996-2002.

Dehen, C. J.; Everly, R. M.; Plocinik, R. M.; Hedderich, H. G.; Simpson, G. J., Discrete retardance second harmonic generation ellipsometry. Review of Scientific Instruments 2007, 78, (1), 013106/1-013106/7.

Wampler, R. D.; Zhou, M.; Thompson, D. H.; Simpson, G. J., Mechanism of the Chiral SHG Activity of Bacteriorhodopsin Films. Journal of the American Chemical Society 2006, 128, (34), 10994-10995.

Lynch, B. P.; Hilton, A. M.; Simpson, G. J., Nanoscale dielectrophoretic spectroscopy of individual immobilized mammalian blood cells. Biophysical Journal 2006, 91, (7), 2678-2686.

Hilton, A. M.; Lynch, B. P.; Simpson, G. J., Dielectrophoretic force microscopy. American Laboratory (Shelton, CT, United States) 2006, 38, (8), 23-25.

Simpson, G. J.; Dailey, C. A.; Plocinik, R. M.; Moad, A. J.; Polizzi, M. A.; Everly, R. M., Direct Determination of Effective Interfacial Optical Constants by Nonlinear Optical Null Ellipsometry of Chiral Films. Analytical Chemistry 2005, 77, (1), 215-224.

Polizzi, M. A.; Plocinik, R. M.; Simpson, G. J., Ellipsometric approach for the real-time detection of label-free protein adsorption by second harmonic generation. [Erratum to document cited in CA140:371406]. Journal of the American Chemical Society 2005, 127, (3), 1058.

 Plocinik, R. M.; Everly, R. M.; Moad, A. J.; Simpson, G. J., Modular ellipsometric approach for mining structural information from nonlinear optical polarization analysis. Physical Review B: Condensed Matter and Materials Physics 2005, 72, (12), 125409/1-125409/14.

Perry, J. M.; Moad, A. J.; Begue, N. J.; Wampler, R. D.; Simpson, G. J., Electronic and Vibrational Second-Order Nonlinear Optical Properties of Protein Secondary Structural Motifs. Journal of Physical Chemistry B 2005, 109, (42), 20009-20026.

Moad, A. J.; Simpson, G. J., Self-Consistent Approach for Simplifying the Molecular Interpretation of Nonlinear Optical and Multiphoton Phenomena. Journal of Physical Chemistry A 2005, 109, (7), 1316-1323.

Hilton, A. M.; Lynch, B. P.; Simpson, G. J., Reduction of Tip-Sample Contact Using Dielectrophoretic Force Scanning Probe Microscopy. Analytical Chemistry 2005, 77, (24), 8008-8012.

Simpson, G. J.; Plocinik, R. M., Exploiting polarization in nonlinear optical surface spectroscopy. Proceedings of SPIE-The International Society for Optical Engineering 2004, 5510, (Monophotonic Materials), 97-106.

Simpson, G. J.; Perry, J. M.; Moad, A. J.; Wampler, R. D., Uncoupled oscillator model for interpreting second harmonic generation measurements of oriented chiral systems. Chemical Physics Letters 2004, 399, (1-3), 26-32.

Simpson, G. J., Molecular origins of the remarkable chiral sensitivity of second-order nonlinear optics. ChemPhysChem 2004, 5, (9), 1301-1310.

Polizzi, M. A.; Plocinik, R. M.; Simpson, G. J., Ellipsometric approach for the real-time detection of label-free protein adsorption by second harmonic generation. Journal of the American Chemical Society 2004, 126, (15), 5001-5007.

Moad, A. J.; Simpson, G. J., A Unified Treatment of Selection Rules and Symmetry Relations for Sum-Frequency and Second Harmonic Spectroscopies. Journal of Physical Chemistry B 2004, 108, (11), 3548-3562.

Dailey, C. A.; Burke, B. J.; Simpson, G. J., The general failure of Kleinman symmetry in practical nonlinear optical applications. Chemical Physics Letters 2004, 390, (1-3), 8-13.

Plocinik, R. M.; Simpson, G. J., Polarization characterization in surface second harmonic generation by nonlinear optical null ellipsometry. Analytica Chimica Acta 2003, 496, (1-2), 133-142.

Burke, B. J.; Moad, A. J.; Polizzi, M. A.; Simpson, G. J., Experimental Confirmation of the Importance of Orientation in the Anomalous Chiral Sensitivity of Second Harmonic Generation. Journal of the American Chemical Society 2003, 125, (30), 9111-9115.

Simpson, G. J.; Perry, J. M.; Ashmore-Good, C. L., Molecular and surface hyperpolarizability of oriented chromophores of low symmetry. Physical Review B: Condensed Matter and Materials Physics 2002, 66, (16), 165437/1-165437/10.

Simpson, G. J.; Ashmore-Good, C. L.; Perry, J. M.; Plocinik, R. M., Nonlinear optics of oriented chiral systems. Trends in Optics and Photonics 2002, 79, (Nonlinear Optics), 348-350.

Simpson, G. J., Structural origins of circular dichroism in surface second harmonic generation. Journal of Chemical Physics 2002, 117, (7), 3398-3410.

Simpson, G. J., New tools for surface second-harmonic generation. Applied Spectroscopy 2001, 55, (1), 16A-32A.