
1.Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
2.Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
3.Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
JX Cheng, Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA E-mail: jcheng@purdue.edu
Published:2015-06,
Published Online:13 January 2015,
Received:05 August 2014,
Revised:09 January 2015,
Accepted:10 January 2015
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Liao, C. S. et al. Microsecond scale vibrational spectroscopic imaging by multiplex stimulated Raman scattering microscopy. Light: Science & Applications, 4, e265 (2015).
Liao, C. S. et al. Microsecond scale vibrational spectroscopic imaging by multiplex stimulated Raman scattering microscopy. Light: Science & Applications, 4, e265 (2015). DOI: 10.1038/lsa.2015.38.
Real-time vibrational spectroscopic imaging is desired for monitoring cellular states and cellular processes in a label-free manner. Raman spectroscopic imaging of highly dynamic systems is inhibited by relatively slow spectral acquisition on millisecond to second scale. Here
we report microsecond scale vibrational spectroscopic imaging by lock-in free parallel detection of spectrally dispersed stimulated Raman scattering signal. Using a homebuilt tuned amplifier array
our method enables Raman spectral acquisition
within the window defined by the broadband pulse
at the speed of 32 µs and with close to shot-noise limited detection sensitivity. Incorporated with multivariate curve resolution analysis
our platform allows compositional mapping of lipid droplets in single live cells
observation of intracellular retinoid metabolism
discrimination of fat droplets from protein-rich organelles in
Caenorhabditis elegans
spectral detection of fast flowing tumor cells and monitoring drug diffusion through skin tissue
in vivo
. The reported technique opens new opportunities for compositional analysis of cellular compa
rtment in a microscope setting and high-throughput spectral profiling of single cells in a flow cytometer setting.
optical microscopyRaman scatteringvibrational spectroscopy
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