2D Materials: Preparation, Properties, Modeling & Applications: Carbon Related Materials - Processing, Properties & Applications I
Sponsored by: TMS Functional Materials Division, TMS: Thin Films and Interfaces Committee
Program Organizers: Nuggehalli Ravindra, New Jersey Institute of Technology; Madan Dubey, US Army Research Laboratory; Sufian Abedrabbo, Khalifa University; Hesam Askari, University Of Rochester; Gerald Ferblantier, University of Strasbourg - IUT LP / ICube Laboratory - CNRS; Ramana Chintalapalle, University of Texas at El Paso; Joshua Young, New Jersey Institute Of Technology; Adele Carrado, University of Strasbourg; Karine Mougin, Cnrs, Is2m; Heinz Palkowski, Clausthal University of Technology

Monday 8:30 AM
March 20, 2023
Room: Aqua AB
Location: Hilton

Session Chair: Madan Dubey, Army Research Laboratory, Sensors and Electron Devices Directorate; Nuggehalli Ravindra, New Jersey Institute of Technology


8:30 AM Introductory Comments

8:35 AM  Invited
Group IV-V Based Lamellar Thin Films: A Path Toward Novel 2D Materials: Mathieu Stoffel1; Alix Valdenaire1; Sébastien Geiskopf1; Xavier Devaux1; Erwan André1; Cédric Carteret1; Alexandre Bouché1; Michel Vergnat1; Hervé Rinnert1; 1Universite De Lorraine
     Group IV-V semiconductor alloys have gained a renewed interest due to their lamellar structure. This property opens the route toward novel 2D group IV-V materials such as 2D-SiP or 2D-GeP. The former is predicted to be a direct bandgap material while the latter is characterized by a strong in-plane anisotropy. So far, only few works have concerned the growth and the characterization of Si:P and Ge:P thin films.Here we show that annealing Si:P films above 950°C leads to the formation of orthorhombic SiP. For Ge:P films, the formation of monoclinic GeP is observed after annealing at 450°C. Above 500°C, P desorption occurs and only Ge remains in the films. Microstructural investigations reveal the coexistence of P-doped Si(Ge) grains with micrometer sized SiP (GeP) grains, which exhibit a lamellar structure. Atomically resolved chemical maps for Si and P atoms are in good agreement with the atomic structure of orthorhombic SiP.

9:00 AM  Invited
Laser Photothermal Production of 3D Graphene with Polymers for Multifunctionality: Pilgyu Kang1; Byoung Gak Kim2; Minsu Kim2; Seung Min Lee1; Shirin Movaghgharnezhad1; 1George Mason University; 2Korea Research Institute of Chemical Technology
    Structuring of 2D materials and combining 2D materials with conventional materials such as metals and polymers can enable new functionalities and high performance by engineering exceptional and outstanding mechanical, electrical, and optical properties. The existing methods for synthesizing hybrid materials comprising graphene and metal NPs require complicated processes. We present a facile and rapid laser photothermochemical processing method to produce 3D porous graphene as well as a nanoassembly of 3D porous graphene and PdNPs from polymer films. Multi-dimensional hybrid nanomaterials combining 3D graphene and 1D metallic nanoparticles are produced in large scale with low production cost by transient laser photothermal processing. The nanohybrid material showed outstanding crystallinity, structural homogeneity with uniform NP sizes and distribution, and large surface area resulting from the hierarchical multiscale pore structure, allowing ultrahigh sensitivity hydrogen sensing with outstanding mechanical reliability, flexibility, and durability upon bending and twisting.

9:25 AM  Invited
Mapping the Local and Global Vibrational Properties of Hetero-strained Twisted Bilayer Graphene: Hesam Askari1; Aditya Dey1; Shoieb Chowdhury1; 1University of Rochester
    Fabrication of twisted bilayer graphene has led to many fascinating properties that are strongly correlated with the periodically repeating pattern in its structure. Within each pattern, inter-layer interactions cause reconfiguration of atoms in each layer and form sub-regions with unique stacking. While this phenomenon has been extensively studied using experimental and computational methods for angles close to the threshold angle ~1.1 degrees, the extent of reconstruction for higher angles is unclear. In addition, the correlation of local domains and their contribution to the global properties is yet to be understood. We use atomistic-level analyses to identify these local regions and track their formation and evolution with strain using interpretive and fundamental physical measures. We show that optical phonon modes and Raman signatures is particularly tied to that of the AB-stacking. Furthermore, we report validated evidence of structural reconstruction for larger twist angles and quantify the extent of reconstruction.

9:50 AM  Keynote
Laser Processing of Novel 2D and 3D Diamond Related Materials: Jagdish Narayan1; 1North Carolina State University
    This talk focuses on laser processing of 2D carbon (graphene, graphene oxide, and reduced graphene oxide) and h-BN, and 3D Q-carbon and diamond related materials. These materials can be processed by nanosecond pulsed laser processing and PECVD in a controlled way with wafer scale integration for next-generation device applications. Spatial selectivity can be used to create novel 2D and 3D solid state devices. Detailed properties of these novel materials and devices will be covered in this presentation.

10:20 AM Break

10:35 AM  
Preparation and Electromagnetic Shielding Effectiveness (EMI SE) of Cobalt Nanowires/Carbon Nanotubes Composites: Syed Sajl1; Rajakumar Devarapalli1; 1Khalifa University
    Electrochemical deposition employing anodized aluminum oxide (AAO) templates produced cobalt nanowires.Cobalt nanowires and Carbon Nanotubes were incorporated into a Nanocomposite film, and X-band electromagnetic interference (EMI) shielding was studied.Our findings provide significant insight into the shielding and magnetic behavior of cobalt nanowires and Carbon Nanotubes, making it essential to design them in accordance with the application-specific requirements. In this polymer/metal system, we exhibited an EMI SE amplification effect that may be a result of interphase chemical and/or physical interactions.The VNA analysis revealed that this EMI SE amplification effect was apparent when metal content was incorporated. A range of fundamental measures, including X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), and vector network analysis, were used to elucidate the mechanisms involved (VNA).

10:55 AM  Invited
2D Amorphous Carbon Dielectric for Nanoelectronics: Congjun Wang1; 1National Energy Technology Laboratory
    Two-dimensional (2D) semiconductors and semimetals could enable performance and scaling of solid-state electronic devices beyond the limits of those built on their conventional bulk counterparts. However, their suitable accompanying 2D dielectric, ideally in the highly disordered amorphous form similar to SiO2 for silicon, has not been identified, which prevents nanoelectronic devices based on low-dimensional nanomaterials from fulfilling their potential. The synthesis of 2D amorphous dielectrics and their integration into electronic devices are challenging due to the metastable nature of amorphous phases. Here we discuss the synthesis of a solution processible precursor to enable a scalable and solution-based strategy to prepare large-area and freestanding 2D amorphous carbon monolayers and multilayers as novel dielectrics. The synthesis and characterization of the carbon precursor and the 2D amorphous carbon film will be described. To demonstrate the effectiveness of the 2D amorphous carbon as dielectric materials, carbon nanoelectronic devices are fabricated and evaluated.

11:20 AM  Keynote
Graphene and Metal Oxides Based Functional Materials for High Performance Perovskite Solar Cells and Multicomponent-Detecting Sensors: Yoon-Bong Hahn1; 1Jeonbuk National University
    Functional nanomaterials and composites based on graphene and metal oxides has led to significant advances in the development of perovskite solar cells (PSCs) and multicomponent detecting sensors. We developed simple methods for production of functional nanocomposites such as Ag-graphene, perovskite/Ag-graphene, NiO-carbon-graphite, Al2O3/graphene, perovskite-NiO, perovskite/Sn-graphene, etc and utilized them for the fabrication of highly stable and efficient PSCs. The composites-based PSCs showed an efficiency over 20 % and remarkable stability with retaining 97-99 % of the initial values of photovoltaic parameters with sustaining ~ 93% of initial efficiency over 300 days under ambient conditions. We also developed graphene and metal oxides based functrional nanomaterials for detecting multiple analytes with field-effect transistors (FETs) array chemcial and biological sensors. The development of an integrated FETs array biosensor platform will have a significant impact on rapid detection under critical patient conditions, early identification of disease/disorder and on future generations.

11:50 AM  Invited
Defect Modulation in Laser Induced Graphene Oxide for Advanced Electrochemical Sensing: Pratik Joshi1; Jagdish Narayan1; Roger Narayan1; 1NC State University
    Hydrogen peroxide levels are an effective biomarker for diagnosing, cell death or cancerous growth, cardiac aberrations, and genetic/somatic diseases linked to cerebral disorders. We report on the fabrication of excimer laser-induced holey graphene oxide (GO) on conducting Si substrate for electrochemical detection of hydrogen peroxide. The structure of GO was characterized using Raman spectroscopy, SEM, and TEM. The electrical properties were characterized using Hall Effect measurements.Laser annealing of amorphous carbon (a-C) at 0.4 Jcm -2 leads to only surface melting and hence, doesn’t show a good response towards H 2 O 2 sensing. However, Laser annealing at 0.6 Jcm -2 leads to complete melting of amorphous carbon and the GO thus formed demonstrated an excellent sensing behavior. After an Increased number of shots at 0.6 Jcm -2 , there are increased number of cracks and defects leading to improvement in Limit of detection from mM to nM.