个人简介

B.S. (1996), Peking University, Beijing, China M.S.(1999), Peking University, Beijing, China Ph.D.(2004), University of North Carolina – Chapel Hill Electrochemistry, Analytical Chemistry, Nanoscience and Nanotechnology

研究领域

Electrochemistry, Analytical Chemistry, Nanoscience and Nanotechnology

The GWang group is interested in the behavior of charges at nanometer scale interfaces. The charges can be divided into two categories: electrons and ions. Ions refer specifically to cations and anions; including both biomacromolecules (i.e. proteins and nucleic acids) and smaller nanoparticles with charges. We study both transient and steady-state ion transport behavior confined near an asymmetric substrate-solution interface via experimental analysis and theoretical simulation. Two distinct platforms are being investigated： individual channel-type nanopipettes and nanopores. Frequency-domain impedance spectroscopy and various time-domain electroanalytical methods are applied to gain insights into the emerging transport mechanisms at nanoscale interfaces. For more details, click NanoElectroChemistry on the left. This fundamental understanding is employed to address the heterogeneity in single-molecule single-activity sensing and other applications. For more details, click Heterogeneity in Single Molecule Analysis on the left. The electronic structures of molecules are well studied under the conventional chemistry regime at angstrom scale (10-10 meter). In various nanoscale objects, the overall electron behaviors are mostly regulated by quantum confinement effects (i.e. the nanoscale sizes and shapes). The percentage of surface-affected electrons is inversely proportional to nanoscale object dimensions. Correspondingly, electron behavior at the nanoscale object's surface is affected by both chemical bonding on the surface and electron delocalization within the object. For more details, click Metal nanoclusters on the left.

近期论文

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Li, Y.; Wang, D.; Kvetny, M.; Brown, W. Liu, J.; Wang, G.* History-dependent Power Generation in Dynamic Ion Transport through Conical Nanopipettes as Solid-state Ion pumps Chem. Sci., 2015, 6, 588-595 Jiang, J. Conroy, C. V.; Ahuja, T.; Lake, G.; Padelford, J. and Wang, G.* Oxidation at Core-ligand Interface of Au Lipoic Acid Nanoclusters and the Enhancement in near IR Luminescence J. Phys. Chem. C, 2014, 118 (35), 20680–20687. Wang, D.; Kvetny, M.; Liu, J.; Brown, W.; Li, Y.; Wang, G.* Physical Origin of Dynamic Ion Transport Features through Single Conical Nanopores at Different Bias Frequencies Chem. Sci., 2014, 5, 1827-1832 Conroy, C. V.; Jiang, J.; Zhang, C.; Ahuja, T.; Tang, Z.; Prickett, C. A.; J. Yang, Wang. G.* Enhancing Near IR Luminescence of Thiolate Au Nanoclusters by Thermo Treatments and Heterogeneous Subcellular DistributionsNanoscale, 2014, 6, 7416-7423 Wang, D.; Kvetny, M.; Liu, J.; Brown, W.; Li, Y.; Wang, G.* Transmembrane Potential across Single Nanopores and the Resulting Memristive and Memcapacitive Ion Transport J. Am. Chem. Soc. 2012, 134, 3651-3654