AVS 47th International Symposium
    Surface Science Tuesday Sessions
       Session SS-TuP

Paper SS-TuP30
Reactions of Hydrazoic Acid (N@sub3@H) on Water and Gold Surfaces Characterized Using RAIRS and XPS

Tuesday, October 3, 2000, 5:30 pm, Room Exhibit Hall C & D

Session: Poster Session
Presenter: D.H. Fairbrother, Johns Hopkins University
Authors: S.R. Carlo, Johns Hopkins University
J. Torres, Johns Hopkins University
D.H. Fairbrother, Johns Hopkins University
Correspondent: Click to Email
The chemistry of hydrazoic acid (N@sub3@H) on gold and amorphous ice surfaces was studied as a function of N@sub3@H exposure, temperature, and X-ray irradiation using reflection absorption infrared spectroscopy (RAIRS) and XPS. N@sub3@H adsorbed on ice at 100K initially led to azide production (N@sub3@@super-@), and subsequent N@sub3@H deposition. On Au, N@sub3@H adsorbed molecularly at 100K. On either surface annealing caused increased order in the film and loss of N@sub3@H correlated with N@sub3@@super-@ production. Three new IR bands were observed in the NH stretching region at T>180 K. The adsorption characteristics and thermal chemistry of N@sub3@H on ice suggest a chemisorbed state. These NH and N@sub3@@super-@ bands were stable to T>220K. Experiments were performed using N@sub3@D to elucidate the nature of these species. On both surfaces X-ray irradiation induced significant molecular desorption, increased azide concentration and production of the same three bands in the NH stretching region as observed when heating.