Strong explosive interaction of hydrogenated porous silicon with oxygen at cryogenic temperatures

D Kovalev, V Y Timoshenko, N Kunzner, E Gross, F Koch

Research output: Contribution to journalArticlepeer-review

141 Citations (Scopus)

Abstract

We report new types of heterogeneous hydrogen-oxygen and silicon-oxygen branched chain reactions which have been found to proceed explosively after the filling of pores of hydrogen-terminated porous silicon (Si) by condensed or liquid oxygen in the temperature range of 4.2-90 K. Infrared vibrational absorption spectroscopy shows that, while initially Si nanocrystals assembling the layers have hydrogen-terminated surfaces, the final products of the reaction are SiO2 and H2O. Time-resolved optical experiments show that the explosive reaction develops in a time scale of 10(-6) S. We emphasize the remarkable structural properties of porous Si layers which are crucial for the strong explosive interaction.
Original languageEnglish
JournalPhysical Review Letters
Volume8706
Issue number6
DOIs
Publication statusPublished - 2001

Fingerprint

Dive into the research topics of 'Strong explosive interaction of hydrogenated porous silicon with oxygen at cryogenic temperatures'. Together they form a unique fingerprint.

Cite this