Nanomechanical systems with small dissipation
Author(s)Tao, Ye, Ph. D. Massachusetts Institute of Technology
Massachusetts Institute of Technology. Department of Chemistry.
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This thesis is devoted to a systematic development of methods for controlling energy dissipation in small mechanical systems, specifically nanomechanical resonators with at least one dimension in the deep nanometer range (< 200 nm). We explored three avenues for decreasing intrinsic dissipation and one method for decreasing non-contact friction. The three routes toward lower intrinsic dissipation are surface chemical engineering, alternative materials testing, and geometric optimization through nanofabrication. Reduction in non-contact friction between a vibrating nanomechanical resonator and a surface, spaced nanometers away from the latter, was achieved by using a diamond nanowire as an integrated scanning tip. Each of the four approaches led to between one and two orders of magnitude reduction in dissipation compared to the previous state-of-the-art in the literature. Planned integration of individual successful approaches is expected to result in devices with sufficient force sensitivity and with the suitable geometry for the nanomechanical detection of a single nuclear spin by magnetic resonance force microscopy.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 2015.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 257-285).
DepartmentMassachusetts Institute of Technology. Department of Chemistry.
Massachusetts Institute of Technology