-
Unsupervised Clustering Methods for Image Segmentation: Application to Scanning Electron Microscopy Images of Graphene
Online Presentations | 27 Jan 2021 | Contributor(s):: Aagam Rajeev Shah
This tutorial will introduce you to some basic image segmentation techniques driven by unsupervised machine learning techniques such as the Gaussian mixture model and k-means clustering. You will learn how to implement k-means clustering and template matching, and use these to segment a...
-
SEM Image Segmentation Workshop
Tools | 12 Jan 2021 | Contributor(s):: Aagam Rajeev Shah, Darren K Adams, Mitisha Surana, Ricardo Toro, Sameh H Tawfick, Elif Ertekin
This tool introduces users to machine learning used to segment microscopy images
-
"Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans: Going Atomic
Series | 15 Nov 2020 | Contributor(s):: Rachel Altovar, Susan P Gentry
Expanding on the pre-existing resource on nanoHUB: “Turning Fruit Juice into Graphene Quantum Dots” this resource expands on the concepts in the experimental guide to give a comprehensive overview of materials pertaining to concepts and ideas within the...
-
MODULE 3 - Structures: "Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans: Going Atomic
Teaching Materials | 15 Nov 2020 | Contributor(s):: Rachel Altovar, Susan P Gentry
In MODULE 3- Structures in the "Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans, crystal structures and systems are investigated. This module relates back to graphene and how its structure relates back to its unique properties in comparison to other forms of...
-
MODULE 1 - Graphene: "Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans: Going Atomic
Teaching Materials | 13 Nov 2020 | Contributor(s):: Rachel Altovar, Susan P Gentry
The first module in "Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans, explores the material, graphene, how it was discovered, and the unique properties that it has. The activity paired with this lesson plan re-creates the famous "sticky-tape"...
-
MODULE 2 - Sizes: "Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans: Going Atomic
Teaching Materials | 13 Nov 2020 | Contributor(s):: Rachel Altovar, Susan P Gentry
The next installment of Turning Fruit Juice into Graphene Quantum Dots" Supplementary Lesson Plans delves into the concept of size and how materials and their properties may change at the macro-, micro-, and nanoscale. Activities include viewing images from a microscope to determine...
-
Atomistic Green’s Functions: The Beauty of Self-energies
Online Presentations | 28 Oct 2020 | Contributor(s):: Tillmann Christoph Kubis
This presentation gives an introduction to NEGF. It will be explained how self-energies cause NEGF to fundamentally differ from most other quantum methods. Atomistic examples of phonon and impurity scattering self-energies agree quantitatively with experiments.
-
Bandgap Manipulation of Armchair Graphene nanoribbon
Papers | 01 Sep 2020 | Contributor(s):: Lance Fernandes
Bandgap Manipulation is very important for various applications. Optical Devices need smaller Bandgap where as Diode's need larger Bandgap. Armchair graphene Nanoribbon (AGNR) has a special property where if the numbers of atoms are multiple of three or multiple of three plus one, they are...
-
Mechanical Exfoliation as a Route to Nanomanufacturing of 2D van der Waals Bonded
Online Presentations | 11 May 2020 | Contributor(s):: Daryl Chrzan
In this talk I present a mechanical exfoliation method able to reliably produce large patterned monolayer samples and place them with upon a substrate in desired locations. The method relies on the epitaxial strain imposed upon the layer to be exfoliated by the deposition of a thin metallic film.
-
Synthesis of Graphene by Chemical Vapor Deposition Part II: Data Science + Graphene Synthesis
Online Presentations | 29 Apr 2020 | Contributor(s):: Sameh H Tawfick
Overall, these two lectures are meant to be a general introduction on the opportunities and challenges related to graphene synthesis.
-
Synthesis of Graphene by Chemical Vapor Deposition Part I
Online Presentations | 29 Apr 2020 | Contributor(s):: Sameh H Tawfick
Overall, these two lectures are meant to be a general introduction on the opportunities and challenges related to graphene synthesis.
-
Image Segmentation for Graphene Images
Online Presentations | 29 Apr 2020 | Contributor(s):: Joshua A Schiller
This lecture outlines the need for a fast, automated means for identifying regions of images corresponding to graphene. Simple methods, like color masking and template matching, are discussed initially. Unsupervised clustering methods are then introduced as potential improvements...
-
Images of Nanotubes, Graphene, Buckyballs, etc.
Downloads | 24 Apr 2020 | Contributor(s):: Marco Curreli
Free images of nanotubes, graphene, buckyballs, etc.
-
Turning Fruit Juice into Graphene Quantum Dots
Teaching Materials | 06 Jan 2020 | Contributor(s):: John Gomm, NNCI Nano
Graphene, a sub-nanometer thick sheet made of carbon, was isolated just over a decade ago (2004), yet swiftly won the Nobel Prize for Geim and Novoselov in 2010 for its properties of high strength, conductivity, and transparency. Students will replicate the procedure used to isolate graphene...
-
Gr-ResQ
Tools | 27 Aug 2019 | Contributor(s):: Joshua A Schiller, Kaihao Zhang, Kevin James Cruse, Darren K Adams, Elif Ertekin, Sameh H Tawfick, Mitisha Surana, Aagam Rajeev Shah, Ricardo Toro
Query submit and analyse graphene sythesis data.
-
Graphene Layer Structure with 3% Random Silicon
Downloads | 02 Aug 2019 | Contributor(s):: James Charles, Sabre Kais, Tillmann Christoph Kubis
This .xyz file contains a 11,520,000 atoms structure of graphene with randomly placed Silicon. The concentration of Silicon is approximately 3%. This structure file was used to create the data in the paper "Recursive open boundary and interfaces method for material modeling, exemplified on...
-
Gr-ResQ: Graphene Processing and Analysis Data
Online Presentations | 15 May 2019 | Contributor(s):: ST H Tawfick
-
Electronic Structure and Transport Properties of Graphene on Hexagonal Boron Nitride
Presentation Materials | 06 Dec 2018 | Contributor(s):: Shukai Yao, Luis Regalado Bermejo, Alejandro Strachan
Graphene is a zero-bandgap conductor with high carrier mobility. It is desired to search for an opening of band structure of graphene such that this kind of material can be applied in electronic devices. Depositing hexagonal Boron Nitride (h-BN) opens a bandgap in the band structure of...
-
SEM Image Processing Tool
Tools | 02 Oct 2018 | Contributor(s):: Joshua A Schiller, Matthew Glen Robertson, Kristina M Miller, Kevin James Cruse, Kevin Liu, Darren K Adams, Benjamin Galewsky, Elif Ertekin, Sameh H Tawfick
Analysis and feature detection in SEM images of Graphene.
-
Graphene Nanopore Drilling
Tools | 27 Sep 2018 | Contributor(s):: Jae Hyun Park, Darren K Adams, Narayan Aluru
Drilling a nanopore in graphene by Si-nanoparticle bombardment