Masters Theses


Ayse Beyaz

Keywords and Phrases

Acoustic sensing; Microphone packaging


"Polyaniline, an inherently conducting polymer, was synthesized and fabricated as an acoustic membrane enclosure for the packaging of a MEMS-based acoustic microsensor. The package design should minimize environmental ambient impact including dust and excess moisture and maximize microphone performance. Freestanding films of the emeraldine base form of polyaniline were doped with aluminum acetoacetonate, iron acetoacetonate, copper acetoacetonate and titanium ethoxide. Polymer-metal hybrid compositions were analyzed by scanning electron microscopy (SEM) and deconvoluting X-ray photoelectron spectra (XPS) to discern interactions between metal atoms and polyaniline. Mechanical properties of the material, specifically the glass transition temperature and elastic and imaginary moduli, were measured by dynamic mechanical analysis (DMA) as a function of metal type, mechanical excitation frequency and temperature. The hybrid materials were then formed and shaped as flat membranes or as shaped domes of variable radii of curvature, including hemispherical. Acoustic transmission properties of metal-doped planar and dome-shaped membranes were measured by insertion loss as a function of acoustic frequency between 100 to 2000 Hz in a plane wave tube. Results indicated that the type of metal incorporated into polyaniline effected properties. Increases in mechanical stiffness and the acoustic resonance frequency were observed with increasing metal-polymer interaction"--Abstract, page iv.


Schuman, Thomas P.

Committee Member(s)

O'Keefe, Matthew
Chusuei, Charles C.



Degree Name

M.S. in Chemistry


Funding for the project was provided by the Defense Advanced Research Projects Agency (DARPA) through the Army Research Laboratory (DAAD-19-00-1-0176) under project managers Dr. Edgar Martinez (DARPA) and Dr. Nassy Srour (ARL).


University of Missouri--Rolla

Publication Date

Summer 2003

Journal article titles appearing in thesis/dissertation

  • Chemical characterization of polymer/metal hybrid enclosures
  • Acoustic characterization of metal/polymer membrane enclosures


xi, 66 pages

Note about bibliography

Includes bibliographical references.


© 2003 Ayse Beyaz, All rights reserved.

Document Type

Thesis - Restricted Access

File Type




Thesis Number

T 8325

Print OCLC #


Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

Share My Thesis If you are the author of this work and would like to grant permission to make it openly accessible to all, please click the button above.