Graduate Student Asantha Dharmaratne will Present “Effective Tuning of Bimetallic Composition of Gold-Copper Nanomolecules” to the Department.
Abstract:
The elemental composition of the nanomaterial or the nanoalloy plays a vital role toward the applications of future nano devices. The introduction of a foreign metallic atom into a parent nanomolecule would enhance the properties including electronic, optical, and catalytic. During a technologically advanced era, such modified nanomolecules will have a crucial impact on catalysts, sensors, and energy sources.1,2 Here we report a one-phase synthesis of 144-atom gold copper bimetallic nanoalloys for the first time. The mass spectrometric investigation reveals a possible incorporation of copper atoms interdispersed in the inner-core of the proposed Au144(SR)60 nanomolecule.3,4
References
(1) Ruiz, A.; Arbiol, J.; Cirera, A.; Cornet, A.; Morante, J. R. Materials Science and Engineering: C 2002, 19, 105.
(2) Yacamán, M. J.; Ascencio, J. A.; Tehuacanero, S.; Marín, M. Topics in Catalysis 2002, 18, 167.
(3) Dharmaratne, A. C.; Dass, A. Chemical communications 2014, 50, 1722.
(4) Olga Lopez-Acevedo, J. A., Robert L. Whetten, Henrik Grönbeck, and Hannu Häkkinen j. phys. Chem. C 2009, 113, 5035.
Figure 1. Expanded view of the 2+ of ESI-MS data. The average number of Au and Cu atoms is denoted above each peak envelope.