Identification of the most stable silver cluster ions produced under plasma solution conditions

Abstract We present adsorption processes of dinitrogen on size-selected silver cluster cations, Agn+ (n = 1–10), studied by kinetics measurement using an ion trap. The cluster ions showed sequential adsorption of N2 molecules when the ion trap was cooled down to 105 K, excluding n = 8 and 9 that were exceptionally inactive at this temperature. Termolecular rate coefficients of each adsorption step are determined by analyzing time-dependent changes in the reactant and product ion signals. The first-step rate coefficients were found to increase exponentially from n = 1 to 7 due to increased internal degrees of freedom at larger sizes, which are favorable for accommodating the adsorption energy in a free cluster. In contrast, the adsorption rate turned to decrease for n > 7 due to weaker binding of dinitrogen as revealed by density-functional-theory (DFT) calculation. Adsorption sites on Agn+ are further discussed on the basis of the maximum number of adsorbing N2 molecules observed in the experiment.

Download Full-text

Fragmentation and ion-scattering in the low-energy collisions of small silver cluster ions (Agn+: n=1−4) with a highly oriented pyrolytic graphite surface

The Journal of Chemical Physics ◽

10.1063/1.1287658 ◽

2000 ◽

Vol 113 (9) ◽

pp. 3808-3813 ◽

Cited By ~ 12

Author(s):

Yutaka Tai ◽

Wataru Yamaguchi ◽

Yutaka Maruyama ◽

Kazuki Yoshimura ◽

Junichi Murakami

Keyword(s):

Pyrolytic Graphite ◽

Silver Cluster ◽

Low Energy ◽

Graphite Surface ◽

Cluster Ions ◽

Highly Oriented Pyrolytic Graphite ◽

Ion Scattering

Download Full-text

Fragmentation of plasma resonances in open-shell silver cluster ions

Il Nuovo Cimento D ◽

10.1007/bf02451646 ◽

1994 ◽

Vol 16 (4) ◽

pp. 391-400

Author(s):

E. Lipparini ◽

A. Ventura

Keyword(s):

Silver Cluster ◽

Open Shell ◽

Cluster Ions

Download Full-text

Generation of large gas-phase silver cluster ions by laser desorption/ionization of silver-containing salts

Chemical Physics Letters ◽

10.1016/s0009-2614(99)00819-2 ◽

1999 ◽

Vol 310 (5-6) ◽

pp. 466-470 ◽

Cited By ~ 25

Author(s):

H. Rashidzadeh ◽

Baochuan Guo

Keyword(s):

Gas Phase ◽

Silver Cluster ◽

Laser Desorption ◽

Cluster Ions ◽

Laser Desorption Ionization ◽

Desorption Ionization

Download Full-text

DEPOSITION OF MASS-SELECTED Ag7 ON Pd(100): FRAGMENTATION AND IMPLANTATION

Surface Review and Letters ◽

10.1142/s0218625x96001704 ◽

1996 ◽

Vol 03 (01) ◽

pp. 949-954 ◽

Cited By ~ 9

Author(s):

G. VANDONI ◽

C. FÉLIX ◽

R. MONOT ◽

J. BUTTET ◽

C. MASSOBRIO ◽

...

Keyword(s):

Molecular Dynamics ◽

Incident Energy ◽

Silver Cluster ◽

Cluster Ions ◽

Embedded Atom Method ◽

Collision Process ◽

Embedded Atom ◽

Molecular Dynamics Calculations ◽

Impact Energies ◽

The Impact

Mass-selected silver-cluster ions [Formula: see text] with an incident energy of 2.86 eV/atom and of 13.6 eV/atom are directed on a well-prepared Pd(100) surface, which is probed with thermal-energy atom (helium) scattering (TEAS), before, during, and after the deposition, yielding information on the collision process. We find that part of the cluster atoms are implanted into the surface layer, the fraction depending on the impact energy. Considerable fragmentation is present at both impact energies. Molecular dynamics calculations based on embedded atom method (EAM) potentials are used to model the collision process. These calculations confirm qualitatively the experimental results.

Download Full-text