Comparison between models of insulator and semiconductor thin films islanding

Abstract

International audienceThe synthesis of self-organized quantum dots (QD's) can be achieved through bottom up layer by layer deposition processes as chemical vapor deposition (CVD) or physical vapor deposition (PVD). However, QD's may also be synthesized via sol-gel route, which involves a spontaneous evolution from thin films to discrete QD's without further deposition. The aim of the paper is to discuss and compare the physical phenomena involved in QD's formation which initiate from thin film surface roughening between PVDCVD and sol-gel synthesis approaches. We propose two simple physical models which are relevant to explain the fundamental differences between those methods

Interface energies of(100)YSZand(111)Lallet1, Olivi-Tran2, Lewis3 2009Phys. Rev. B11180View full textAdd to dashboardCite

“…[7][8][9][10][11][12][13] Several theoretical investigations have been concerned with the physical parameters responsible for the geometric properties of the nanocrystals. [14][15][16][17][18][19] The fabrication of such systems can be realized through various techniques involving the formation of nanometerscale islands in a collective way, a process known as selforganization. The basic idea is to promote the formation of nanocrystals on a crystalline substrate using thin solid films which demonstrate spontaneous evolution from a continuous two-dimensional solid layer to a rough and/or discontinuous film, i.e., three-dimensional epitaxial nanocrystals.…”

Interface energies of (100)_{YSZ} and (111)_{YSZ} epitaxial islands on (0001)_{alpha-Al_2O_3} substrates from first principles

“…7,8,9,10,11,12,13 Several theoretical investigations have been concerned with the physical parameters responsible for the geometric properties of the nanocrystals. 14,15,16,17,18,19 The fabrication of such systems can be realised through various techniques involving the formation of nanometer-scale islands in a collective way, a process known as self-organisation.…”