Functional Nanomaterials: Functional Low-Dimensional (0D, 1D, 2D) Materials 2022: Low-Dimensional 0D Nanoparticles & Plasmonics
Sponsored by: TMS Functional Materials Division, TMS: Nanomaterials Committee
Program Organizers: Michael Cai Wang, University of South Florida; Yong Lin Kong, University of Utah; Sarah Ying Zhong, University of South Florida; Surojit Gupta, University of North Dakota; Nasrin Hooshmand, Georgia Institute of Technology; Woochul Lee, University of Hawaii at Manoa; Min-Kyu Song, Washington State University; Simona Hunyadi Murph, Savannah River National Laboratory; Hagar Labouta, University of Manitoba; Max Anikovskiy, University of Calgary; Patrick Ward, Savannah River National Laboratory

Monday 8:30 AM
February 28, 2022
Room: 260B
Location: Anaheim Convention Center

Session Chair: Nasrin Hooshmand, Georgia Institute of Technology; Hagar Labouta, University of Manitoba

8:30 AM  
Extinction Properties of Singular Plasmonic Nanoparticles: Nasim Mohammadi Estakhri1; Nooshin M. Estakhri2; 1Chapman University; 2University of Michigan
    Geometrical singularities in plasmonic nanoparticles may be designed to create localized edge modes and concentrated field enhancement in the proximity of the singularity. In such cases, scattering and absorption from the particle may be structurally tunable with high sensitivity to the local material properties, edge angles, and the polarization of the excitation field. In this work, we investigate extinction properties of a class of singular plasmonic nanoparticles in form of truncated half-cylinders. We analytically study the formation and properties of the edge modes, followed by numerical investigations on the tunability and sensitivity of the extinction properties of these particles. Finally, arrays of singular plasmonic nanoparticles (in form of metasurfaces) will be explored.

8:50 AM  
Hydrogen Sensing Using Novel Core-shell Plasmonic Nanoparticles: Joshua Maurer1; David Sconyers1; Rosemary Calabro1; Stephen Bartolucci1; 1US Army DEVCOM-AC
    Noble metal nanoparticles exhibit localized surface plasmon resonance (LSPR) when interacting with light, which has been studied for applications such as catalysis, biosensing, gas detection, and chemical sensing. One commonly used material in hydrogen sensing is palladium, which can dissociate hydrogen gas and form a hydride, resulting in a shift of the LSPR absorption. Core-shell nanoparticles consisting of a noble metal core and a shell material, such as a transition metal oxide, could provide a material system for hydrogen detection with a more permanent plasmonic shift during exposure to hydrogen. In this work, we show the synthesis of various noble metal core-shell nanoparticles, including gold-copper (I) oxide and gold-palladium, with spherical and spiked structures and evaluate their ability to detect hydrogen in colloidal suspensions. In addition, we will discuss electrochemical methods to synthesize core-shell nanoparticles and spectroelectrochemistry to characterize the nanoparticles during growth.

9:10 AM  
Electron Transport in Plasmonic Nanocomposites: Patrick Ward1; 1Savannah River National Laboratory
    Localized surface plasmon resonances provide unique mechanisms for electron transfer processes in nanocomposite systems. Additionally, these electrons can be leveraged to provide pathways for the development of novel energy conversion and storage devices. By controlling the shape, size, and composition of nanomaterials, the excitation wavelength and electron transfer mechanisms can be altered. Herein, the fundamentals of electron transfer mechanisms in plasmonic nanomaterial systems will be discussed and the potential for these plasmonic systems to drive chemical reactions. Examples of surface plasmon induced catalysis will be provided as well as potential applications for advanced energy storage and conversion devices.

9:30 AM  
Plasmonic Nanoparticles for Sensing, Drug Delivery and Photothermal Therapy of Cancer: Nasrin Hooshmand1; 1Georgia Institute of Technology
    Remarkable progress has been made in the engineering of nanoparticles to be biocompatible and has direct cellular access which allows greater efficacy of cancer cell drug targeting and avoiding side effects for the healthy cells. Nanoparticles especially those made of silver and gold, have been receiving extensive attention owing to their extremely attractive plasmonic properties called “localized Surface Plasmon Resonance (LSPR)” that enables them to absorb and re-radiate photons when they are exposed to electromagnetic radiation. These nanoparticles are promising candidates for photothermal therapy and biochemical sensing. Using plasmonic nanoparticles we examine cancer cell imaging, photothermal therapy, and release and delivery of an anticancer drug from gold nanoparticle carriers by inducing localized plasmonic heating in the cancer cells region following NIR irradiation. This study has provided valuable insight into the application of nanoparticles in medicine and molecular biology.

9:50 AM Break

10:10 AM  Keynote
Plasmonic Approaches to Biology and Medicine: Paul Weiss1; 1University of California Los Angeles
    Biology functions at the nanoscale. Thus, there are special opportunities not only to make biological measurements using nanotechnology, but also to interact directly in order to influence biological outcomes. I describe how we fabricate and use plasmonic nanostructures to advance high-throughput gene editing for cellular therapies and in the selective capture, probing, and release of single circulating tumor cells in liquid biopsies.