Femtogram-Scale Photothermal Spectroscopy of Explosive Molecules on Nanostrings
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...
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| Veröffentlicht in: | Analytical chemistry (Washington) 2014-11, Vol.86 (22), p.11368-11372 |
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| container_title | Analytical chemistry (Washington) |
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| creator | Biswas, T. S Miriyala, N Doolin, C Liu, X Thundat, T Davis, J. P |
| description | 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 photothermal spectroscopy. This detection scheme is quick, label-free, and is compatible with parallelized molecular analysis of multicomponent targets. |
| doi_str_mv | 10.1021/ac503318e |
| format | Article |
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| language | eng |
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| source | MEDLINE; American Chemical Society Journals |
| subjects | Analytical chemistry Compatibility Desorption Explosions Explosives Fingerprints Molecular chemistry Molecular Structure Nanoparticles - analysis Nanostructure Nanotechnology Photochemical Processes RDX Silicon Compounds - analysis Silicon nitride Spectroscopy Spectrum Analysis Temperature Triazines - analysis |
| title | Femtogram-Scale Photothermal Spectroscopy of Explosive Molecules on Nanostrings |
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