Effect of Au irradiation energy on ejection of ZnS nanoparticles from ZnS film

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2403240· OSTI ID:20884974

Kuiri, P K; Ghatak, J; Joseph, B; Lenka, H P; Sahu, G; Mahapatra, D P; Tripathi, A; Kanjilal, D; Mishra, N C ^[1]

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1. Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005 (India)

ZnS films deposited on Si have been irradiated with Au ions at 35 keV, 2, and 100 MeV. Sputtered particles, collected on catcher foils during irradiation, were analyzed using transmission electron microscopy. For the case of 35 keV Au irradiation, no nanoparticle (NP) could be observed on the catcher foil. However, NPs 2-7 nm in size, have been observed on the catcher foils for MeV irradiations at room temperature. For particle sizes {>=}3 nm, the distributions could be fitted to power law decays with decay exponents varying between 2 and 3.5. At 2 MeV, after correction for cluster breakup effects, the decay exponent has been found to be close to 2, indicating shock waves induced ejection to be the dominant mechanism. The corrected decay exponent for the 100 MeV Au irradiation case has been found to be about 2.6. Coulomb explosion followed by thermal spike induced vaporization of ZnS seems to be the dominant mechanism regarding material removal at such high energy. In such a case the evaporated material can cool down going into the fragmentation region forming clusters.

• OSTI ID: 20884974
• Journal Information: Journal of Applied Physics, Vol. 101, Issue 1; Other Information: DOI: 10.1063/1.2403240; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DISSOCIATION
EVAPORATION
FOILS
FRAGMENTATION
GOLD IONS
ION BEAMS
IRRADIATION
KEV RANGE 10-100
MEV RANGE
NANOSTRUCTURES
PARTICLE SIZE
PARTICLES
SEMICONDUCTOR MATERIALS
SHOCK WAVES
TEMPERATURE RANGE 0273-0400 K
THERMAL SPIKES
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
ZINC SULFIDES