ISSN:
1432-0630
Keywords:
82.65J
;
82.20
;
68.35
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract Under certain well-defined conditions (p co, $$p_{{\text{O}}_{\text{2}} } $$ ,T) the rate of catalytic oxidation of CO on a Pt(110) surface may exhibit sustained temporal oscillations with an autonomous frequencyv 0. Small amplitude modulation of $$p_{{\text{O}}_{\text{2}} } $$ with frequencyv p causes a variety of phenomena characteristic for systems of nonlinear dynamics which may be identified with temporal order and show formal similarities to spatial order of surface phases: Periodic behavior for certain rational numbers ofv p/v0 — corresponding to commensurate surface structures; quasiperiodic behavior characterized by an irrational ratio of the periods of perturbation and response — corresponding to incommensurate structures; and critical slowing down near the boundary of a transition to quasiperiodicity which has its counterpart in the critical fluctuations near a (spatial) phase transition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00619704
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