Novel Deposition Approaches of Self-Assembled Molecular Films- Towards Understanding of Formation of Two-Level Systems for Quantum Computing Applications
Abstract
The progress in quantum technology relies on high performing qubits with minimal losses in superconducting and dielectric properties, as well as in their interfaces. Understanding what causes the loss of performance is of paramount importance. In this work, we focus on the development of chemical molecules that possess molecular rotors (CF-, OH- functional groups) in their structures that move at a particular microwave frequency. Tracking of these frequencies provides unprecedented insight into the loss mechanisms in lossy dielectric systems. The goal of this work is to develop deposition methods of self-assembled molecules onto hydrogen terminated Si surfaces using strong Si-C bonds for molecular attachment rather than the typical Si-O. In the first part of the report we discuss the synthesis and the deposition of w-F alkyne monolayers containing ten (C10) and eighteen (C18) carbon chains in their structure onto Si surfaces. We found that deposition of these molecules following established literature protocols did not produce uniform closely packed monolayers. Thus, we developed new deposition protocols and established critical parameters that needed attention for further process optimization. The second part of the report is devoted to the deposition of 4-(vinyl)phenol (VP), 3-(ethenyl)phenol (EP), and 4-(vinylphenol)methanol (VPM) onto Si surfaces. The most successful deposition was achieved with EP molecules which produced multilayer films with hydrophobic nature, followed by VP, and finally, VPM films. Further experiments with increased deposition temperature and catalyst are needed to optimize the developed protocols.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 13, 2020
- Accession Number
- AD1106361
Entities
People
- Evgeniya H. Lock
- Matthew Laskoski
- Stephen Deese
- Zariana Mobley
Organizations
- United States Naval Research Laboratory