portrait portrait

The 15th International Conference on

Vibrations at Surfaces

June 22-26, 2015 ▪ Donostia-San Sebastián, Spain

Donostia Igeldotik

Program

OverviewMondayTuesdayWednesdayThursdayFriday

Thursday June 25

09:00-10:40 Th1: Adsorbate and interface dynamics
10:40-11:20 Coffee break
11:20-13:00 Th2: STM-IETS and beyond
13:00-15:30 Lunch break (on your own)
15:30-16:40 Th3: Molecular films and 2D materials
16:40-17:20 Coffee break
17:20-19:00 Th4: Tip-enhanced vibrational spectroscopies
20:30-23:00 Conference dinner at Cofradía Vasca de Gastronomía, Old Town

Th4: Tip-enhanced vibrational spectroscopies

Chair: J. I. Pascual, San Sebastián, Spain

17:20-17:50 R. P. Van Duyne, Evanston, USA
Tip-enhanced Raman spectroscopy
17:50-18:20 Z. Dong, Hefei, China
Sub-nm resolved single-molecule Raman spectromicroscopy
18.20-18:40 K. F. Domke, Mainz, Germany
A novel tool to investigate electrified interfaces on the nanoscale: EC-TERS
18:40-19:00 I. I. Rzeźnicka, Tohoku, Japan
Determination of molecular orientation in monolayers adsorbed on metals using STM-based TERS

Invited talk

Sub-nm resolved single-molecule Raman spectromicroscopy

Z. Dong

Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China (USTC), Hefei 230026, China

To access individual chemical identity of closely packed molecular species at the nanoscale in a reliable and unambiguous way is a scientific challenge but of important practical applications in materials science, biology, and molecular nanotechnology. Molecular vibrations provide a valuable "fingerprint" for this identification. The vibrational spectroscopy based on tip-enhanced Raman scattering (TERS) has opened a path to obtain enhanced vibrational signals thanks to the strong localized plasmonic field at the tip apex. In this talk, I shall demonstrate single-molecule Raman spectroscopic imaging with unprecedented sub-nm spatial resolution, resolving even the inner structure of a single molecule and its configuration on the surface [1]. This is achieved by using a plasmon-enhanced nonlinear TERS technique that invokes a double-resonance process and resultant nonlinear optical effect, thanks to the exquisite control and tuning capability provided by low-temperature ultrahigh-vacuum scanning tunneling microscopy (STM) [2]. I shall also demonstrate the power of this STM-controlled nonlinear TERS technique in distinguishing adjacent but different molecules on surfaces in real space and address the issue of how close and how similar these different molecules can be. These findings should open up new avenues for probing and controlling nanoscale structures, catalysis, photochemistry, and even DNA sequencing, all at the sub-nm and single-molecule scale.

[1] R. Zhang, Y. Zhang, Z. C. Dong*, S. Jiang, C. Zhang, L. G. Chen, L. Zhang, Y. Liao, J. Aizpurua, Y. Luo, J. L. Yang , and J. G. Hou*, Nature 498, 82-86 (2013)

[2] Z. C. Dong*, X. L. Zhang, H. Y. Gao, Y. Luo, C. Zhang, L. G. Chen, R. Zhang, X. Tao, Y. Zhang, J. L. Yang, J. G. Hou*, Nature Photon. 4, 50-54 (2010)