AVS 45th International Symposium
    Biomaterial Interfaces Group Monday Sessions
       Session BI-MoP

Paper BI-MoP9
Time-of-Flight Cluster Static SIMS, XPS and XRD Studies of Calcium Phosphate Phases

Monday, November 2, 1998, 5:30 pm, Room Hall A

Session: Biomaterial Interfaces Poster Session
Presenter: C.C. Chusuei, Texas A&M University
Authors: C.C. Chusuei, Texas A&M University
D.R. Justes, Texas A&M University
M.J. VanStipdonk, Texas A&M University
E.A. Schweikert, Texas A&M University
D.W. Goodman, Texas A&M University
Correspondent: Click to Email
Calcium phosphate phase identification is of interest in the modeling of bone growth on metal oxide surfaces. Ostwaltd's step rule suggests that various phases of calcium phosphate will form first prior to that of the principal phase found in bone, hydroxyapatite (HAP). XRD has been shown to be effective in distinguishing between brushite, octacalcium phosphate, amorphous calcium phosphate, alpha-tricalcium phosphate, beta-tricalcium phosphate and HAP. However, this technique is not sensitive to microscopic amounts of material. The effectiveness of ToF cluster SSIMS and XPS methods in the qualitative analysis of standard calcium phosphate powders are compared with XRD. In addition, results of SIMS and XPS studies the solid-liquid uptake of calcium phosphate on UHV prepared metal oxide are presented.