Journal
ANALYTICAL CHEMISTRY
Volume 93, Issue 34, Pages 11679-11685Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.1c00875
Keywords
-
Categories
Funding
- National Key R&D Program of China [2017YFA0700500]
- National Natural Science Foundation of China [21874068, 21627806, 22004069]
Ask authors/readers for more resources
Probing the orientation and oxygenation state of single molecules using surface enhanced Raman scattering (SERS) can provide multidimensional structural information, bridging the primary sequence and advanced structure of single molecules. This study demonstrates the high detection sensitivity of sub-10 nm conical gold nanopores for detecting orientations and states of single molecules.
Probing the orientation and oxygenation state of single molecules (SMs) is of great importance for understanding the advanced structure of individual molecules. Here, we manipulate molecules transporting through the hot spot of a sub-10 nm conical gold nanopore and acquire the multidimensional structural information of the SMs by surface enhanced Raman scattering (SERS) detection. The sub-10 nm size and conical shape of the plasmonic nanopore guarantee its high detection sensitivity. SERS spectra show a high correlation with the orientations of small-sized single rhodamine 6G (R6G) during transport. Meanwhile, SERS spectra of a single hemoglobin (Hb) reveal both the vertical/parallel orientations of the porphyrin ring and oxygenated/deoxygenated states of Hb. The present study provides a new strategy for bridging the primary sequence and the advanced structure of SMs.
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