1. Soft X-Ray Microscopic Investigation on Self Assembling Nanocrystals.
- Author
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Benk, M., Bergmann, K., Querejeta-Fernández, A., Srivastava, S., Kotov, N. A., Schaefer, D., and Wilhein, T.
- Subjects
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MOLECULAR self-assembly , *X-ray microscopy , *NANOCRYSTALS , *CADMIUM compounds , *PHOTONS , *PARTICLES , *TIN compounds - Abstract
Soft x-ray microscopy is well suited to investigation of nanoparticles in liquid media. Using a table-top microscope based on a gas-discharge source emitting at 2.88 nm, dried CdTe nanowires and dried PbS hyperbranched nanocrystals are investigated. These structures are the result of the assembly of nanoparticles in a liquid environment. Soft x-ray microscopy is aiming at a better understanding of underlying parameters that affect the self assembly to the desired final structures. It is shown that the presented setup is able to image these particles with a resolution of about 50 nm with exposure times in the range of tens of seconds. The discharge source has a photon flux of more than 109 photons/(sr s μm2) at a photon energy of 430 eV with a bandwidth of λ/Δλ = 840. The repetition rate of the source is up to 1000 Hz. With the current setup a photon flux of 5×106 photons/(μm2 s) at the sample is achieved. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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