Grafted 2D Assembly of Colloidal Metal Nanoparticles for Application as a Variable Capacitor (pages 1729–1733)
N. Lidgi-Guigui, C. Dablemont, D. Veautier, G. Viau, P. Seneor, F. Nguyen Van Dau, C. Mangeney, A. Vaurès, C. Deranlot and A. Friederich
Article first published online: 25 MAY 2007 | DOI: 10.1002/adma.200602866
A combination of sputtering and colloidal chemistry is employed to prepare [Co/Al2O3//Ru nanoparticles//Al2O3/Co] junctions (see figure). These junctions are applied as variable capacitors relying on Coulomb blockades in a 2D assembly of nanoparticles. AC measurements show a significant capacitance variation as a function of applied DC voltage with a maximum of relative variation value that is proportional to the particle density embedded in the dielectric layer and is in good agreement with the theoretical model.