The frames in the slideshow below represent some of our recent projects.
To learn more about these projects, click on the slides.
Some recent projects
- 1 - Laser induced silicon microcolumn arrays (LISMA) exhibit nanophotonic properties and unique fragmentation patterns that are adjustable by the laser fluence, and simultaneously produce high and low energy fragments.
- 2 - Laser ablation electrospray ionization (LAESI) is a new atmospheric pressure ion source for mass spectrometry. LAESI enables the direct analysis tissues, cells and other water containing samples.
- 3 - Silicon nanopost arrays (NAPA) can be tailored to exhibit resonant ion production. Ion yields from posts with subwavelength diameter show sharp resonances at high aspect ratios.
- 4 - Phase Doppler anemometry reveals that droplet size and velocity distributions in electrosprays are strongly dependent on the spraying mode that, in turn, is determined by the liquid flow rate and the spray voltage.
- 5 - Laser ablation electrospray ionization (LAESI) mass spectromtry enables the atmospheric pressure molecular imaging of biological tissues. The LAESI image of a rat brain coronal section shows the distribution of specific lipids.
- 7 - Nanopost array (NAPA) chips with different periodicities on a silicon wafer exhibit unique optical properties. Excited by laser radiation, they behave as nanophotonic ion sources.
- 8 - Single cell analysis by laser ablation electrospray ionization (LAESI) mass spectromtry produces rich spectra with over 100 ionic species. Numerous metabolites and lipids can be identified.
- 9 - Fast photography of electrospray mensci reveals the relationship between spraying modes and ion production in electrospray ionization. Dramatic changes in the droplet size distributions result from the various ejection and breakup mechanisms observed.