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Unique laser-scanning optical microscope for low-temperature imaging and spectroscopy

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3 Author(s)
Zhang, Li ; Department of Chemistry, City College of New York, New York, New York 10031 ; Aite, Saliha ; Yu, Zhonghua

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Low-temperature optical characterization of single quantum nanostructures can reveal detailed information on structure-dependent properties of these materials. We describe the development of a unique laser-scanning optical microscope capable of low-temperature single molecule/particle imaging and spectroscopy. Making use of the magnification of a microscope objective, the laser- scanning scheme of the present microscope allows for high-repeatability imaging over large sample areas. The microscope is utilized to measure the low-temperature Raman scattering spectra of individual single-walled carbon nanotubes and single molecule fluorescence spectra of conjugated polymers. The developed low-temperature microscope can be applied to study a wide array of nanomaterials at a single particle level.

Published in:

Review of Scientific Instruments  (Volume:78 ,  Issue: 8 )