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Femtogram-Scale Photothermal Spectroscopy of Explosive Molecules on Nanostrings.
- Source :
-
Analytical Chemistry . 11/18/2014, Vol. 86 Issue 22, p11368-11372. 5p. - Publication Year :
- 2014
-
Abstract
- We demonstrate detection of femtogram-scale quantities of the explosive molecule 1,3,5-trinitroperhydro-1,3,5-triazine (RDX) via combined nanomechanical photothermal spectroscopy and mass desorption. Photothermal spectroscopy provides a spectroscopic fingerprint of the molecule, which is unavailable using mass adsorption/desorption alone. Our measurement, based on thermomechanical measurement of silicon nitride nanostrings, represents the highest mass resolution ever demonstrated via nanomechanical photo-thermal spectroscopy. This detection scheme is quick, label-free, and is compatible with parallelized molecular analysis of multicomponent targets. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00032700
- Volume :
- 86
- Issue :
- 22
- Database :
- Academic Search Index
- Journal :
- Analytical Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 99850403
- Full Text :
- https://doi.org/10.1021/ac503318e