Collaboration over the World Wide WebUsing IN-VSEE’s remote SPM
B.L. RamakrishnaArizona state University
August 2nd 2001
EVOLUTION OF NANO-TECHNOLOGY
Mol. Biology
“ IN EDUCATION FOR THE NANOSCALE, STUDENTS
NEED TO LEARN TO WORK ON THE NANOMETER
SCALE. THIS OPENS COMPLETELY NEW DIMENSIONS
ON HOW WE WILL APPROACH AND SOLVE MANY
PROBLEMS IN THE FUTURE AS WE ENTER THE
NANOMETER AGE.”
HEINRICH ROHRER, NOBEL LAUREATE
Nanoscience and Technology
INVSEE’S MOTIVATION
Convey the excitement of Nanoscience and technologyand reinforce key concepts in a highly visual manner.
Develop and deliver web-based interactive educationwhich has a component of experimental design.
Integrate learning across size, scale and disciplines.
Connect structure, properties and phenomena at theMacro-, micro- and nano-levels.
Develop interface for SPM over the World Wide Web.
IN-VSEE Can Develop Efficient, Geographically Unbounded Hands-On Training And Education
In Nanotechnology
MicroscopeControl Station
World Wide WebServer
Community College/UniversityScience or Engineering Class
IndustrialTraining
CommunityOutreach
Museums
GloballyCompetitive
Integrate research with education and outreach.
Couple leading-edge telecommunication technologieswith cutting-edge science and engineering.
Allow institutions without local access to SPM to image andmanipulate samples remotely at another institution.
Allow scientist and students to share specific imaging techniquesby training together over the Internet.
Enable instruments from several institutions to be shared remotelyto build an international “laboratory without walls”.
Enable educators and researchers to share educational materials developed in collaborating institutions.
Global Collaboration over the World Wide Web
Web-accessible Resources Developed by IN-VSEE
•Educational Modules
•Visualization Gallery
•Interactive Activities
•Web Operable Remote SPM
IN-VSEEEducational Modules
Important Concepts in Nanoscience
Length Scale and Scaling Laws
Atomic and Molecular Forces
Size-dependence and Nanoscale Resolutionof Physical and Chemical Properties
Surfaces and Interfaces
Self-assembly and Epitaxy
Approaches to Design, Synthesis, Fabricationand Characterization of Nanostructures
Modules integrated horizontally to connect key material concepts across disciplines and vertically across vast regime of sizes and scales
Modules developed around a unifyingmaterial theme: structure, properties, processing and performance and across vast regime of sizes and scales
Reinforce Fundamentals & Prepare forCareers in Nanotechnology
Remote Experimentation
Interactive Visual-based
• Interactive modules Promote interest and excitement• Visual-based learning ‘Seeing is believing’• Remote SPM Encourage discovery-based learning
Module Philosophy
MaterialNanoworld
IN-VSEEVisualization Gallery
IN-VSEE Visualization Gallery
Download of Images and Links to Educational Module
Images and educationalmodules can be adaptedfor uses.
Interactive Science Activities
Interpreting Microscopy Images of Graphite
Measuring DNA and Determining Number of Base Pairs
IN-VSEEWeb-Accessible Remote SPM
Remote SPM Operator Page
Remote SPM Observer Page
Features of IN-VSEE’s Project that Facilitate Collaboration
SPMChatbox
Pointer on Image
Video-Conferencing with EnVison
Other Complementary techniquesSEMRBS / PIXE
Chatbox on remote pages
Communication is facilitated via typing of text.
Several users can communicate amongst themselves,other user groups, and the operator using the chatboxon the “Observer” page.
Operator can communicate with all users via the Chatboxon the “Operator” Page.
Communication via Videoconferencing
“Face to Face” communication between an expert at ASU andremote users can be facilitated using streaming videoconferencing technology. (Cost approx. 500 US Dollars).
Hardware / software package (EnVision) manufactured by SorensonTechnology as an enhancement for the remote session.
Pointer on Microscope Image
Each user can access a pointer, within the imageportion of “Observer” page so that users can leadothers to interesting features on the sample surface.
It is active when the “Live” button is pushed to receivethe latest broadcast from the microscope.
3-D Plug-in for Manipulating Microscope Data
•Presence of an expert at the microscope is important, especially for the first session.
•Students prefer communicating with a human expert who can point out features and ask and answer questions.
•Students feel that the experience is more “real” using a local microscope, but learn about the SPM just as well using a remote SPM with supporting materials.
Some Findings During a Remote SPM Session
Student - Scientist Partnership
Example of Results from Student’s Independent Project
16 m x 16 m Scan
Packing of 269 nm spheres on mica
Observed features
•Hexagonal packingof spheres
•Vacancies and Dis- locations
•Layers and Terraces
•Islands
16 m x 16 m scan
Packing of 269 nm spheres deposited on mica and rapidly dried.
Additional Features
•Hexagonal packing of spheres on 1st layer
•Metastable square packing on second layer
8 m x 8 m Scan
Packing of co-deposited 200 nm and 100 nm sphere on mica
Observed Features
•Hexagonal packing of identical spheres
•Clusters formed by mixed spheres with predicted “composition”
16 m x 16 m Scan
Sequential Deposition of 100 nm spheres on 200 nm spheres
Observed Features
•Registry of small spheres with bottom layer
•Regions of different compositions
•Long and Short-ranged ordering