Research

        Dr. Tang's research includes the mechanistic studies and applications in electrochemistry, specifically the heterogeneous interaction taking place on the interface of liquid electrolyte and surface-modified electrodes.

Two-dimensional correlation in electrochemical analyses

        Two-dimensional (2D) correlation is a method to reveal the information which is buried in the large volume of data. This method is especially useful for analyses with dynamic spectra as illustrated with the following example.

         In a cyclic voltammetry experiment in a K₄Fe(CN)₆ solution with an electrode coated with poly(vinylferrocene) or PVF, the raised potential oxidizes both Fe(CN)₆^4- and PVF. The current is recorded as a function of potential as well as a function of the time, which can be expressed with a matrix M_i.

Generalized 2D correlation

        Synchronous correlation (F) reveals that peaks are affected by the same factors and they change at the same time either to the same direction (positive correlation) or to the opposite direction (negative correlation).

 F = M_i ^TM_i/(m-1)

 (m is the number of cycles of potential scan.)

        Asynchronous correlation (Y) reveals the order of response to external perturbations. One peak may response earlier (positive correlation) or later (negative correlation) than another peak.

Y = M_i ^TNM_i/(m-1)

 (N is the Hilbert-Noda transformation matrix.)

Hybrid correlation

        In an electrochemical quartz crystal microbalance (EQCM) study of the same chemical system, the hybrid correlation (H) between a mass matrix (M_m) and a charge matrix (M_q) reveals how oxidation is associated with the polymer variation for each chemical.

H =  M_q ^TM_m/(m-1)

 (Further explanation to each above graph is included in a paper listed at the end of this page.)

Publications:

"Electrochemical Gas Sensors: Fundamentals, Fabrication, and Parameters", Stetter, J. R.; Korotcenkov, G.; Zeng, X.; Tang, Y.; Liu, Y., In Chemical Sensors: Comprehensive Sensor Technologies; Vol. 5: Electrochemical and Optical Sensors, Korotcenkov, G., Ed. Momentum Press: New York, 2011, Vol. 5, pp 1-90.

"Two-Dimensional Correlation in Cyclic Voltammetry and Electrochemical Quartz Crystal Microbalance: A Complementary Tool to Conventional Techniques", Whitman, L. R.; Bork, K. P.; Tang, Y.*, J. Electroanal. Chem. 2011, 661, 100-105.

"Conditioning Poly(Vinyl Ferrocene) with Ionic Lilquids for Doping/Undoping of Glycylglycylglycine Peptide", Tang, Y.; Baker, G. A.; Zeng, X.*, J. Phys. Chem. C 2010, 114, 13709-13715.

"Surface Plasmon Resonance: An Introduction to a Surface Spectroscopy Technique", Tang, Y.; Liang, J.; Zeng, X.*, J. Chem. Educ. 2010, 87, 742-746.

"Poly(Vinyl Ferrocene) Redox Behavior in Ionic Liquids", Tang, Y.; Zeng, X.* J. Electrochem. Soc. 2008, 155, F82-F90.

"Carbohydrate-Protein Interactions by 'Clicked' Carbohydrate Self-Assembled Monolayers", Zhang, Y.; Luo, S.; Tang, Y.; Yu, L.; Hou, K.-Y.; Cheng, J.-P.; Zeng, X.*; Wang, P. G.* Anal. Chem. 2006, 78, 2001-2008.

"Nonregeneration Protocol for Surface Plasmon Resonance: Study of High-Affinity Interaction with High-Density Biosensors", Tang, Y.; Mernaugh, R.; Zeng, X.* Anal. Chem. 2006, 78, 1841-1848.

Reviewer for the following journals: (years 2010 and 2011)

Analyst, Royal Society of Chemistry.

Chemical Communications, Royal Society of Chemistry.

Journal of Chemical Education, American Chemistry Society.

Journal of Materials Chemistry, Royal Society of Chemistry.

Physical Chemistry Chemical Physics, Royal Society of Chemistry.

Sensor Letters, American Scientific Publishers.

Sensors, Multidisciplinary Digital Publishing Institute.

Soft Matter, Royal Society of Chemistry.