Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 6, Issue 7, Pages 1275-1284Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.5b00108
Keywords
-
Categories
Funding
- U.S. DOE [DEAC06-76RL01830]
- Advanced Light Source
- Office of Science, Office of Basic Energy Sciences of the U.S. Department of Energy [DE-AC02-05CH11231]
- National Science Foundation (NSF) [CHE 1306398]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1306398] Funding Source: National Science Foundation
Ask authors/readers for more resources
This Perspective highlights recent advances in infrared vibrational chemical nano-imaging. In its implementations of scattering scanning near-field optical microscopy (s-SNOM) and phototherrnal-induced resonance (PTIR), IR nanospectroscopy provides few-nanometer spatial resolution for the investigation of polymer, biomaterial, and related soft-matter surfaces and nanostructures. Broad-band IR s-SNOM with coherent laser and synchrotron sources allows for chemical recognition with small ensemble sensitivity and the potential for sensitivity reaching the single molecule limit Probing selected vibrational marker resonances, it gives access to nanoscale chemical imaging of composition, domain morphologies, order/disorder, molecular orientation, or crystallographic phases. Local intra- and intermolecular coupling can be measured through frequency shifts of a vibrational marker in heterogeneous environments and associated inhomogeneities in vibrational dephasing. In combination with ultrafast spectroscopy, the vibrational coherent evolution of homogeneous sub-ensembles coupled to their environment can be observed. Outstanding challenges are discussed in terms of extensions to coherent and multidimensional spectroscopies, implementation in liquid and in situ environments, general sample limitations, and engineering s-SNOM scanning probes to better control the nano localized optical excitation and to increase sensitivity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available