Advances and Discoveries in Non-equilibrium Driven Nanomaterials and Thin Films: Advances inThin Film Oxides II
Sponsored by: TMS Functional Materials Division, TMS: Advanced Characterization, Testing, and Simulation Committee, TMS: Thin Films and Interfaces Committee
Program Organizers: Ritesh Sachan, Oklahoma State University; Amit Pandey, Lockheed Martin Space; Saurabh Puri, VulcanForms Inc; Amber Srivastava, Indian Institute of Technology; Nuggehalli Ravindra, New Jersey Institute of Technology
Tuesday 8:00 AM
March 1, 2022
Room: 259B
Location: Anaheim Convention Center
Session Chair: Amber Srivastava, IIT-B
8:00 AM Invited
ALD Deposited Functional Hetero-nano Structured Ceria Films: Sudipta Seal1; Udit Kumar1; Corbin Feit1; S. Novia Berriel1; Ayush Arunachalam1; Kanad Basu1; Parag Banerjee1; 1University of Central Florida
Atomic layer deposition is a versatile technique to deposit atomically precision thin films. It is an important manufacturing tool to control and engineer surface properties in 2-D nanomaterials, more precisely thickness-dependent chemistries.. Herein, we present a unique way of engineering defects in ALD nano structured cerium oxide films (CNP). Recently, CNPs has found a wide range of applications from biomedical to electronics. We present a novel method to optimize ALD ceria thin films and precisely control the properties in real-time by utilizing in-situ ellipsometry and machine learning algorithms. An extensive high-resolution X-Ray Photoelectron Spectroscopy (HRXPS) study of thin films reveals the mixed valency of Ce 4f and is correlated to defect concentration and layer thickness in nanoscale. Dual oxidation states in CNP is important for regenerative properties in various biomedical intervention. We also extended the study to fabricate plasmonic hetero nano gold nanorods (AuNR)-CNP architectures.
8:30 AM
Effect of Saturated Gas Species on the Binding Interaction between Nanobubbles and Nanoparticles: Ao Li1; James Earthman1; 1University of California-Irvine
It has been known for some time from freeze-fracture images that nanoparticles will bind to nanobubbles containing oxygen. More recently, we also presented evidence for nanoparticle/nanobubble cluster formation with nanobubbles that were generated with an alternating magnetic field (AMF) system. Specifically, our research has shown that these nanobubbles bind to nanoparticles of calcium carbonate at its solubility limit (5 x 10-4 M) based on nanoparticle tracking analysis (NTA) results. This ability to bind nanoparticles into clusters has important ramifications for preventing fouling and corrosion. Our research is currently focusing on generating nanobubbles that contain different gases, e.g. nitrogen, oxygen and argon, to study the effect of internal gas specie the nanobubbles’ ability to bind to nanoparticles. So far, evidence indicates that both oxygen and nitrogen allow for this binding process. Besides NTA, our experimental approach also includes Raman spectroscopy and liquid-phase transmission electron microscopy.