Dear MEMS community: We are conducting a survey of methods to detect atomic and subatomic particles for a size constrained application. We'd like to hear from anyone in the MEMS community who has purposely, or accidently, used micromachined structures to sense such particles. Please, if you can, answer the following questions: 1) What particles were detected, if known? 2) What structure was used? 3) What performance was achieved (Probability of detection, sensing field-of-view, etc.)? Thank you for your cooperation. Jim Brady E-Systems ECI Division Voice: 813-381-2000 x2773 FAX: 813-343-9605 email: jlbc@qmgate.eci-esyst.com