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Spatial Separation of Molecular Conformers and Clusters

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

Electron diffraction of CS₂ nanoclusters embedded in superfluid helium droplets.

Jie Zhang¹, Stephen D Bradford¹, Wei Kong¹

¹Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, USA.

The Journal of Chemical Physics

|June 15, 2020

Summary

Electron diffraction reveals structures of carbon disulfide (CS₂) nanoclusters within superfluid helium droplets. This technique allows in situ monitoring of nanocluster formation, showing distinct structures for small and large clusters.

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Area of Science:

Physical Chemistry
Materials Science
Nanotechnology

Background:

Superfluid helium droplets provide a unique environment for cluster formation.
Understanding nanocluster structure is crucial for materials science.

Purpose of the Study:

To investigate the structures of carbon disulfide (CS₂) nanoclusters.
To demonstrate electron diffraction for in situ monitoring of nanocluster formation in helium droplets.

Main Methods:

Experimental electron diffraction on CS₂ nanoclusters.
Size measurements of doped superfluid helium droplets.
Doping statistics modeling.
Least squares fitting for structural determination.

Main Results:

Determined the range of CS₂ cluster sizes.
Identified structures of CS₂ dimers, trimers, and tetramers.
Observed a transition from molecular to bulk-like structures with increasing cluster size.
CS₂ dimers favor gas-phase structures, while trimers and tetramers adopt crystalline structures.

Conclusions:

Electron diffraction is feasible for in situ monitoring of nanocluster formation in superfluid helium.
Nanocluster structures depend on size, with small clusters adopting crystalline fragments and larger ones forming bulk-like structures.