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Arnaldo Carrasquillo, Ph.D.

Analytical Chemistry: Electrochemistry

Email: arnaldo.carrasquil@upr.edu

Office: Q-371

Ext. 2386

Research Interests:

Research efforts are aimed at understanding the role played by electrode surface composition and structure in determining and controlling the electrochemical reactivity of species present at electrode-solution interfaces. Current research projects study fundamental aspects of electrocatalysis, molecular adsorption and biosensor technologies. The studies combine the use of XPS, AES, LEED, TDMS, Vibrational Spectroscopies, Thin Layer and classical electrochemical methods.

Publications

M. Rodríguez-López, J. Solla Gullón, E. Herrero, P. Tuñon, J.M. Feliu, A. Aldaz and A. Carrasquillo, “Electrochemical Reactivity of Aromatic Molecules at Nanometer-Sized Surface Domains: From Pt(hkl) Single Crystal Electrodes to Preferentially Oriented Platinum Nanoparticles.", Journal of the American Chemical Society 2010, 132(7), 2233-2242.

M. Rodriguez-Lopez, P. Tuñon, J.M. Feliu, A. Aldaz and A. Carrasquillo, Jr, “Use of Model Pt(111) Single Crystal Electrodes under HMRDE Configuration to Study the Redox Mechanism for Charge Injection at Aromatic/Metal Interfaces.” Langmuir 2010, 26(3), 2124-2129.

M. Rodríguez-López, A. Rodes, E. Herrero, P. Tuñon, J.M. Feliu, A. Aldaz and A. Carrasquillo, Jr,  “Domain-Selective Reactivity of Hydroquinone-Derived Adlayers at Basal Pt(hkl) Single Crystal Electrodes.” Langmuir 2009, 25, 10337-10344.

M. Rodríguez López, A. Rodes, A. Berna, V. Climent, E. Herrero, P. Tunon, J.M. Feliu, A. Aldaz, A. Carrasquillo Jr., “Model System for the Study of 2D Phase Transitions and Supramolecular Interactions at Electrified Interfaces:Hydrogen Assisted Reductive Desorption of Catechol-Derived Adlayers from Pt(111) Single-Crystal Electrodes.” Langmuir 2008, 24(7), 3551-3561.

Eunice Mercado, Margarita Rodríguez-López, Omar López, Glenda Rodríguez, Estevao R. Fachini, Paulino Tuñón Blanco, Arnaldo Carrasquillo Jr., "Effect of bismuth surface coverage on the kinetics of quinine-hydroquinone at polycrystalline platinum electrodes." Journal of Electroanalytical Chemistry 2007, 604(1), 26–32.

A. Carrasquillo, Jr., J. H. Baricuatro, M. A. Hossain, Y. S. Park, J. J. Jeng, and M. P. Soriaga, "The Interaction of Bromide Ions with Pd(100) Single-Crystal Electrode Surfaces: Studies by UHV-EC", Electrochemical Society, ECS Transactions - Cancun, Volume 3, "Electrochemical Surface Science: Recent Advances in the Study of The Electrode-Electrolyte Interface", 2007.

Margarita Rodríguez-López, Enríque Herrero, Juan M. Feliú, Paulino Tuñón, Antonio Aldaz, Arnaldo Carrasquillo Jr.  "Hydrogen-assisted and CO-assisted reductive desorption of hydroquinone-derived adlayers from Pt(1 1 1) single crystal electrodes.", Journal of Electroanalytical Chemistry 2006, 594(2), 143–151.

Margarita Rodríguez-López, Arnaldo Carrasquillo, Jr, "Improving Conceptions in Analytical Chemistry:  The Central Limit Theorem.", Journal of Chemical Education  2006, 83(11), 1645.

Margarita Rodríguez-López,  Arnaldo Carrasquillo, Jr, "Improving Conceptions in Analytical Chemistry: ci Vi = cf Vf.", Journal of Chemical Education 2005, 82, 1327.

 
   

A long-term interest in our research is the study of the electrochemical reactivity of organic molecules. Emphasis to date has been on adsorption, desorption and electron-transfer to, from and through aromatic, discotic molecules chemisorbed at well-defined metal surfaces, including noble-metal nanoparticles and single-crystal surfaces. These molecules exhibit prototypical photophysical, (photo)electrochemical and electrode surface coordination chemistries. It is expected that an in depth understanding of their spectroelectrochemical behaviour upon chemisorption, will lead to improvements in their utilization for advanced sensing technologies, solar energy harvesting and molecular electronics and to the solution of applied technological problems in the field of Electrochemical Surface Science. Educational (teaching) endeavors concentrate on the development of inquiry based pedagogic strategies in the field of analytical chemistry.

 
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