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. 2022 Jul 21;2(8):1839–1847. doi: 10.1021/jacsau.2c00156

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© 2022 The Authors. Published by American Chemical Society

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(Space quantized) O₂ sticking probabilities on Cu₃Au(110)-(4 × 1). (a) LEED patterns for a clean Cu₃Au(110)-(4 × 1). (b) Schematic depiction of Cu₃Au(110)-(4 × 1) (Cu, reddish balls; Au, yellowish balls). (c) Time evolution of the sticking probability for a space-quantized O₂ impinging on Cu₃Au(110)-(4 × 1) (at a surface temperature of ca. 310 K) with translational energy E_t = 0.10 eV. Time t = 0 corresponds to the time the beam shutter is opened to allow the molecular beam to impinge on the surface. Following the control signal shown (topmost right panel), the direction of the defining magnetic field can be modulated to alternately produce helicopter-like (high signal) and cartwheel-like (low signal) rotating O₂ that impinge on Cu₃Au(110)-(4 × 1). Numerical fits to the corresponding sticking probability data points (using exponentially decaying functions extrapolated to t = 0) also shown to guide the eye. The values at t = 0 correspond to the initial sticking probabilities S₀(H), S₀(C_x), and S₀(C_y).

Inline graphic — (Space quantized) O₂ sticking probabilities on Cu₃Au(110)-(4 × 1). (a) LEED patterns for a clean Cu₃Au(110)-(4 × 1). (b) Schematic depiction of Cu₃Au(110)-(4 × 1) (Cu, reddish balls; Au, yellowish balls). (c) Time evolution of the sticking probability for a space-quantized O₂ impinging on Cu₃Au(110)-(4 × 1) (at a surface temperature of ca. 310 K) with translational energy E_t = 0.10 eV. Time t = 0 corresponds to the time the beam shutter is opened to allow the molecular beam to impinge on the surface. Following the control signal shown (topmost right panel), the direction of the defining magnetic field can be modulated to alternately produce helicopter-like (high signal) and cartwheel-like (low signal) rotating O₂ that impinge on Cu₃Au(110)-(4 × 1). Numerical fits to the corresponding sticking probability data points (using exponentially decaying functions extrapolated to t = 0) also shown to guide the eye. The values at t = 0 correspond to the initial sticking probabilities S₀(H), S₀(C_x), and S₀(C_y).