Dearing, Matthew T.

Dufresne, Faculty Advisor, Eric

Grier, Faculty Advisor, David

Spalding, Faculty Advisor, Gabriel C.

Digital Commons @ Illinois Wesleyan University

Illinois Wesleyan UniversityDigital Commons @ IWUJohn Wesley Powell Student ResearchConference 1999, 10th Annual JWP ConferenceApr 17th, 1:30 PM - 2:30 PMHologram Fabrication for Assembling NanoComposite MaterialsMatthew T. DearingIllinois Wesleyan UniversityGabriel C. Spalding, Faculty AdvisorIllinois Wesleyan UniversityEric Dufresne, Faculty AdvisorUniversity of ChicagoDavid Grier, Faculty AdvisorUniversity of ChicagoFollow this and additional works at: http://digitalcommons.iwu.edu/jwprcThis Event is brought to you for free and open access by The Ames Library, the Andrew W. Mellon Center for Curricular and FacultyDevelopment, the Office of the Provost and the Office of the President. It has been accepted for inclusion in Digital Commons @ IWU bythe faculty at Illinois Wesleyan University. For more information, please contact digitalcommons@iwu.edu.©Copyright is owned by the author of this document.Matthew T. Dearing; Gabriel C. Spalding, Faculty Advisor; Eric Dufresne, Faculty Advisor; and David Grier, FacultyAdvisor, "Hologram Fabrication for Assembling Nano Composite Materials" (April 17, 1999). John Wesley Powell StudentResearch Conference. Paper 15.http://digitalcommons.iwu.edu/jwprc/1999/posters2/15TH-E JOHN WESLEY POWELL STUDENT RESEARCH CONFERENCE" APRIL 1999 Poster Presentation 8 HOLOGRAM FABRICATION FOR ASSEMBLING NANOCOMPOSITE MATERIALS Matthew T. Dearing, Gabriel C. Spalding*, Eric Dufresnet, and David Griert Department of Physics, Illinois Wesleyan University tDepartment of Physics, University of Chicago We have developed a technique which uses laser light to assemble large numbers of micro-particles in a highly-controllable way. Here, we discuss the mechanisms behind our use of visible light to levitate and translate physical objects. This technology, called optical tweezing, has existed for over a decade - but has previously been limited to trapping one or two particles at a time. Our addition of holographic techniques has extended these capabilities significantly, allowing for the simultaneous manipulation of large numbers of colloidal particles into any (user-defined) configuration. We have successfully demonstrated the complete implementation of holographic optical tweezers. We can digitize any image and convert it to a "calculated hologram" via an algorithm of iterative approximation. We then fabricate a transmission hologram which is a physical manifestation of this calculation. In our optical apparatus, the holographic image is then transformed into an array of optical tweezers which trap colloid into the desired structure. So far as we know, the method we have developed is the only means of fully configuring the assembly of particles in solution. Applications are envisioned in many different disciplines including biology and chemistry. 

Hologram Fabrication for Assembling Nano Composite Materials

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Hologram Fabrication for Assembling Nano Composite Materials

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