TY - JOUR
T1 - Size effects in thermal and photochemistry of (NO)2 on Ag nanoparticles
AU - Mulugeta, Daniel
AU - Kim, Ki Hyun
AU - Watanabe, Kazuo
AU - Menzel, Dietrich
AU - Freund, Hans Joachim
PY - 2008/10/1
Y1 - 2008/10/1
N2 - NO dimers adsorbed on alumina supported silver nanoparticles (Ag NPs, radii R∼1-6nm) show decreasing desorption temperatures and complex behavior of photoinduced desorption with decreasing NP size. In particular, for resonant excitation of the (1,0) Mie plasmon at 3.5 eV the photoinduced desorption cross section increases with 1/R, showing a pronounced enhancement (40 times) at R∼2.5nm compared to Ag(111). At 4.7 eV the translational temperature of photodesorbed NO increases strongly with 1/R. We discuss these trends and peculiarities in terms of the size-dependent properties of the Ag NPs.
AB - NO dimers adsorbed on alumina supported silver nanoparticles (Ag NPs, radii R∼1-6nm) show decreasing desorption temperatures and complex behavior of photoinduced desorption with decreasing NP size. In particular, for resonant excitation of the (1,0) Mie plasmon at 3.5 eV the photoinduced desorption cross section increases with 1/R, showing a pronounced enhancement (40 times) at R∼2.5nm compared to Ag(111). At 4.7 eV the translational temperature of photodesorbed NO increases strongly with 1/R. We discuss these trends and peculiarities in terms of the size-dependent properties of the Ag NPs.
UR - https://www.scopus.com/pages/publications/53449098619
U2 - 10.1103/PhysRevLett.101.146103
DO - 10.1103/PhysRevLett.101.146103
M3 - Article
AN - SCOPUS:53449098619
SN - 0031-9007
VL - 101
JO - Physical review letters
JF - Physical review letters
IS - 14
M1 - 146103
ER -