Website: Jiang Group Website
BS, University of Science and Technology of China, 2004; PhD, Chinese Academy of Sciences, 2010; Joint PhD student, Max Planck Institute for Solid State Research, 2008-2009; Postdoctoral Fellow, Northwestern University, 2010-2015.
Our group focuses on applying scanning probe-based nanotechnology in nanostuctures design and properties investigation. We are interested in fundamental science and applications at the nano-scale, including charge transfer, electron localization and generation, photoabsorption and photoemission, which are at the heart of the next generation single-molecule devices.
Tailoring molecular nanostructures at solid surfaces
The design and fabrication of well-defined molecular nanostructures at solid surfaces is highly attractive for a variety of applications ranging from molecular optics and electronics to chemical sensors. To achieve this goal, we use molecular self-assembly, a powerful bottom-up approach for fabricating molecular nanostructures. The ordering of molecules on a substrate is governed by the interplay of intermolecular and interfacial interactions. We directly probe these nanocontacts using Scanning Probe Microscopy. With specifically designed molecular units, the functionality of the overall nanostructure can be finely manipulated. Tailoring nanostructures will benefit new materials with tuned optical and electrical properties at the nano-scale.
Investigating the physicochemical properties of single molecules via nanoimaging and nanospectroscopy
We are developing a hybrid technique, which combines nanoimaging and nanospectroscopy, to harvest the sub-molecular resolution topographic information and chemical information with unprecedented spatial and spectroscopic resolution. Scanning Probe Microscopy can provide quantitative information on surface morphology, such as the locations and binding of molecular adsorbates on solid substrates. Then our spectroscopic signals will be strongly enhanced by the plasmonic probes, providing us with the ability to follow single-molecule processes at specific binding sites on solid surfaces. Our goal is to understand and predict chemical reactivity in photovoltaic, photosynthesis and photocatalysis by interrogating the effect of local environments to the properties of single-molecule devices.
1. N. Jiang, N. Chiang, L. R. Madison, E. A. Pozzi, M. R. Wasielewski, T. Seideman, M. A. Ratner, M. C. Hersam, G. C. Schatz, and R. P. Van Duyne, “Nanoscale Chemical Imaging of a Dynamic Molecular Phase Boundary with Ultrahigh Vacuum Tip-Enhanced Raman Spectroscopy”, Nano Lett.,16, 3898-3904 (2016).
2. N. Chiang, N. Jiang, D. Chulhai, E. Pozzi, M. C. Hersam, L. Jensen, T. Seideman and R. P. Van Duyne, “Molecular-Resolution Interrogation of Porphyrin Monolayer by Ultrahigh Vacuum Tip-Enhanced Raman and Fluorescence Spectroscopy”, Nano Lett., 15, 4114-4120 (2015).
3. J. M. Klingsporn, N. Jiang, E. A. Pozzi, M. D. Sonntag, D. Chulhai, T. Seideman, L. Jensen, M. C. Hersam, and R. P. Van Duyne, “Intramolecular Insight into Adsorbate-Substrate Interactions via Low Temperature, Ultrahigh Vacuum Tip-Enhanced Raman Spectroscopy”, J. Am. Chem. Soc.,136, 3881-3887 (2014).
4. N. Jiang, E. T. Foley, J. M. Klingsporn, M. D. Sonntag, N. A. Valley, J. A. Dieringer, T. Seideman, G. C. Schatz, M. C. Hersam, and R. P. Van Duyne, “Observation of Multiple Vibrational Modes in Ultrahigh Vacuum Tip-Enhanced Raman Spectroscopy Combined with Molecular-Resolution Scanning Tunneling Microscopy”, Nano Lett., 12, 5061-5067 (2012).
5. N. Jiang, Y. Y. Zhang, Q. Liu, Z. H. Cheng, Z. T. Deng, S. X. Du, H. -J. Gao, M. J. Beck, and S. T. Pantelides, “Diffusivity control in molecule-on- metal systems using electric fields”, Nano Lett., 10, 1184-1188 (2010).
6. N. Jiang, Y. L. Wang, Q. Liu, Y. Y. Zhang, Z. T. Deng, K. -H. Ernst, and H. -J. Gao, “Polymorphism and chiral expression in two-dimensional subphthalocyanine crystals on Au(111)”, Phys. Chem. Chem. Phys., 12, 1318-1322 (2010).
Office: 4344 SES, MC 111