Laser-induced surface-plasmon desorption of dye molecules from aluminum films

Journal Article · Sun Mar 01 00:00:00 EST 1992 · Analytical Chemistry (Washington)

DOI:https://doi.org/10.1021/ac00029a005· OSTI ID:589054

Lee, I; Callcott, T A ^[1]; Arakawa, E T ^[1]

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1. Oak Ridge National Lab., TN (United States)

Rhodamine 8 molecules were desorbed without fragmentation from the surface of an Al film by surface-plasmon-induced desorption. Surface plasmons were excited In the Al film by the second harmonic of a Nd:YAG laser in an attenuated-to-tal-reflection (ATR) geometry. The desorbed neutrals were Ionized by a XeCl excimer laser and detected by a time-of-flight mass spectrometer. The desorption yields of both Al and rhodamine B showed a dependence with incidence angle which peaked at the plasmon resonance angle. The thresholds for desorption of Al and rhodamine B occur at the same laser fluence. Two models are proposed to explain these observations. 31 refs., 4 figs.

• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 589054
• Journal Information: Analytical Chemistry (Washington), Vol. 64, Issue 5; Other Information: PBD: 1 Mar 1992
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DESORPTION
INCIDENCE ANGLE
PLASMONS
REFLECTION
ALUMINIUM
RHODAMINES
SURFACE PROPERTIES