Author/Authors :
Dhara، نويسنده , , S and Kesavamoorthy، نويسنده , , R and Magudapathy، نويسنده , , P and Premila، نويسنده , , M and Panigrahi، نويسنده , , B.K. and Nair، نويسنده , , K.G.M and Wu، نويسنده , , C.T and Chen، نويسنده , , K.H and Chen، نويسنده , , L.C، نويسنده ,
Abstract :
The surface plasmon energy of gold clusters formed by Ar+ ion beam mixing of Au/silica is investigated for the size effect. The redshift with decreasing cluster size is assigned to the ‘spillout’ effect in small clusters (<5 nm). Core-electron contribution to the metal dielectric function is mainly responsible for the blueshift with decreasing cluster size (quenching of the size effect) in case of bigger cluster size (>5 nm), assisted with annealing treatment. The competition between ‘spillout’ effect and the frequency dependence of interband dielectric function leads to a quasiquenching of the size effects in the optical response.
