Measurement of the crystallization and phase transition of niobium dioxide thin-films using a tube furnace optical transmission system
Source abstract
Abstract
Niobium dioxide has a volatile memristive phase change that occurs ∼800 °C that makes it an ideal candidate for future neuromorphic electronics. A straightforward optical system has been developed on a horizontal tube furnace for in situ spectral measurements as an as-grown Nb2O5 film is annealed and ultimately crystallizes as NbO2. The system measures the changing spectral transmissivity of Nb2O5 as it undergoes both reduction and crystallization processes. We were also able to measure the transition from metallic-to-non-metallic NbO2 during the cooldown phase, which is shown to occur about 100 °C lower on a sapphire substrate than fused silica. After annealing, the material properties of the Nb2O5 and NbO2 were assessed via x-ray photoelectron spectroscopy, x-ray diffraction, and 4-point resistivity, confirming that we have made crystalline NbO2.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Transition Metal Oxide Nanomaterials · Gas Sensing Nanomaterials and Sensors · Thin-Film Transistor Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, SUNY Brockport 1 , Brockport, Rochester, New York 14420,
NY CREATES 2 , Albany, New York 12203,
College of Nanoscale Science and Engineering, SUNY Polytechnic Institute 3 , Albany, New York 12203,
Department of Physics and Astronomy, Ithaca College 4 , Ithaca, New York 14850,
College of Nanotechnology, Science and Engineering, University at Albany 5 , Albany, New York 12203,
Department of Physics, University of Vermont 6 , Burlington, Vermont 05405,
U.S. Naval Research Laboratory 7 , Washington, District of Columbia 20375,
Funding
National Science Foundation · Office of Naval Research · Air Force Research Laboratory
References (25)
Show source-provided references
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