Collaboration over the World Wide Web Using IN-VSEE’s remote SPM B.L. Ramakrishna Arizona state University August 2nd 2001
EVOLUTION OF NANO-TECHNOLOGY Mol. Biology
Nanoscience and Technology “ 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
INVSEE’S MOTIVATION Convey the excitement of Nanoscience and technology and reinforce key concepts in a highly visual manner. Develop and deliver web-based interactive education which has a component of experimental design. Integrate learning across size, scale and disciplines. Connect structure, properties and phenomena at the Macro-, micro- and nano-levels. Develop interface for SPM over the World Wide Web.
IN-VSEE Can Develop Efficient, Geographically Unbounded Hands-On Training And EducationIn Nanotechnology Industrial Training Community College/University Science or Engineering Class Globally Competitive World Wide Web Server Museums Microscope Control Station Community Outreach
Integrate research with education and outreach. Couple leading-edge telecommunication technologies with cutting-edge science and engineering.
Global Collaboration over the World Wide Web Allow institutions without local access to SPM to image and manipulate samples remotely at another institution. Allow scientist and students to share specific imaging techniques by training together over the Internet. Enable instruments from several institutions to be shared remotely to build an international “laboratory without walls”. Enable educators and researchers to share educational materials developed in collaborating institutions.
Web-accessible Resources Developed by IN-VSEE • Educational Modules • Visualization Gallery • Interactive Activities • Web Operable Remote SPM
IN-VSEE Educational Modules
Important Concepts in Nanoscience Length Scale and Scaling Laws Atomic and Molecular Forces Size-dependence and Nanoscale Resolution of Physical and Chemical Properties Surfaces and Interfaces Self-assembly and Epitaxy Approaches to Design, Synthesis, Fabrication and Characterization of Nanostructures
Reinforce Fundamentals & Prepare for Careers in Nanotechnology Modules integrated horizontally to connect key material concepts across disciplines and vertically across vast regime of sizes and scales Modules developed around a unifying material theme: structure, properties, processing and performance and across vast regime of sizes and scales
Module Philosophy • Remote Experimentation • Interactive Visual-based • Interactive modules Promote interest and excitement • Visual-based learning ‘Seeing is believing’ • Remote SPM Encouragediscovery-based learning Material Nanoworld
IN-VSEE Visualization Gallery
Download of Images and Links to Educational Module Images and educational modules can be adapted for uses.
IN-VSEE Web-Accessible Remote SPM
Features of IN-VSEE’s Project that Facilitate Collaboration SPM Chatbox Pointer on Image Video-Conferencing with EnVison Other Complementary techniques SEM RBS / 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 chatbox on the “Observer” page. Operator can communicate with all users via the Chatbox on the “Operator” Page.
Communication via Videoconferencing “Face to Face” communication between an expert at ASU and remote users can be facilitated using streaming videoconferencing technology. (Cost approx. 500 US Dollars). Hardware / software package (EnVision) manufactured by Sorenson Technology as an enhancement for the remote session.
Pointer on Microscope Image Each user can access a pointer, within the image portion of “Observer” page so that users can lead others to interesting features on the sample surface. It is active when the “Live” button is pushed to receive the latest broadcast from the microscope.
Some Findings During a Remote SPM Session • 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.
Example of Results from Student’s Independent Project
Packing of 269 nm spheres on mica • Observed features • Hexagonal packingof • spheres • Vacancies and Dis- • locations • Layers and Terraces • Islands 16 mm x 16 mm 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 16 mm x 16 mm 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” 8 mm x 8 mm 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 16 mm x 16 mm Scan