In Situ Characterization of Photothermal Nanoenergetic Combustion on a Plasmonic Microchip.
Biyan ChenHaisheng ZhengMatthew RiehnSangho BokKeshab GangopadhyayMatthew R MaschmannShubhra GangopadhyayPublished in: ACS applied materials & interfaces (2017)
Plasmonic gratings facilitate a robust in situ diagnostic platform for photothermal combustion of nanoenergetic composite thin films using an optical microscope and a high-speed camera. Aluminum nanoparticles (Al NPs) embedded in a fluoropolymer oxidizer are cast onto a plasmonic grating microchip and ignited using a low-power laser. The plasmonic grating enhances both spatial resolution and sufficient photothermal coupling to combust small Al NP clusters, initiating localized flames as small as 600 nm in size. Two-color pyrometry obtained from a high-speed color camera indicates an average flame temperature of 3900 K. Scattering measurements using polarized light microscopy enabled precise identification of individual Al NPs over a large field of view, leading to 3D reconstruction of combustion events.
Keyphrases
- high speed
- single molecule
- photodynamic therapy
- atomic force microscopy
- cancer therapy
- particulate matter
- high resolution
- energy transfer
- drug delivery
- drug release
- sewage sludge
- label free
- municipal solid waste
- capillary electrophoresis
- air pollution
- heavy metals
- oxide nanoparticles
- machine learning
- mass spectrometry
- risk assessment
- single cell
- deep learning