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