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Formation of Nanometer‐Size Silicon Particles in a Laser Induced Plasma in SiH4

Fojtik, A., Giersig, M., Henglein, A.·1993·Berichte der Bunsengesellschaft für physikalische Chemie

Abstract

Crystalline silicon particles of cubic structure are formed in the plasma which is initiated in an argon‐silane mixture by a focussed 694 nm Ruby laser flash. Part of the particles can be dissolved as colloid in organic solvents. The solubilization is increased by small amounts of 1,3‐propane‐dithiol. The raw material has a broad size distribution. Centrifugation and filtration methods are applied to obtain samples with narrow size distribution. Small silicon particles have structured absorption spectra. The particles luminesce after etching with HF under air. The larger particles have a red luminescence (peaking at 720 nm) and the smaller particles emit a blue luminesce. The luminescence effects are explained by size quantization of the electronic energy levels in the particles.

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Authors
Fojtik, A., Giersig, M., & Henglein, A.
Venue
Berichte der Bunsengesellschaft für physikalische Chemie
Publisher
Wiley
Published
1993-11
Volume
97
Issue
11
Pages
1493-1496
ISSN
0005-9021 (ISSN-L)
OpenAlex
W2004941122
Cited by
268
References
0
FWCI
3.55
Type
journal article
Language
en
Open access
closed

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