Volume 66, Number 4, May 2004
|592 - 598
|Interdisciplinary physics and related areas of science and technology
|01 May 2004
Metal-to-insulator transition in silver nanolayers grown on silver oxide nanoparticles
Indian Association for the Cultivation of Science - Kolkata, 700 032, India
2 Department of Physics, Calcutta University - Kolkata, 700 009, India
Accepted: 4 March 2004
Silver nanometre thick layers were grown on particles of size by subjecting the latter to a heat treatment at temperatures ranging from 500 to 543. Optical-absorption measurements on particles of core-shell structure and dispersed in ethyl alcohol were carried out over a temperature range from 290 to 340. The results were analysed using size-dependent dielectric permittivity incorporating a free-path effect. The analyses showed the existence of a metal-to-insulator transition in silver nanoshells with a thickness equal to or less than . The extracted values of electrical conductivity over this temperature range showed a semiconducting behaviour with an activation energy of . Direct electrical resistivity measurements substantiated these results obtained from optical absorption data. The activation energies determined from both the above measurements were in satisfactory agreement.
PACS: 81.07.-b – Nanoscale materials and structures: fabrication and characterization / 71.30.+h – Metal-insulator transitions and other electronic transitions
© EDP Sciences, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.