Dearing, Matthew T.

Mueggenburg, Nathan

Spalding, Faculty Advisor, Gabriel

Digital Commons @ Illinois Wesleyan University

Illinois Wesleyan UniversityDigital Commons @ IWUJohn Wesley Powell Student ResearchConference 1998, 9th Annual JWP ConferenceApr 18th, 1:30 PM - 2:30 PMInterparticle Potential in a 1-D Many Body ColloidNathan MueggenburgIllinois Wesleyan UniversityMatthew T. DearingIllinois Wesleyan UniversityGabriel Spalding, Faculty AdvisorIllinois Wesleyan UniversityFollow 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.Nathan Mueggenburg; Matthew T. Dearing; and Gabriel Spalding, Faculty Advisor, "Interparticle Potential in a 1-D ManyBody Colloid" (April 18, 1998). John Wesley Powell Student Research Conference. Paper 17.http://digitalcommons.iwu.edu/jwprc/1998/posters2/17THE JOHN WESLEY POWELL STUDENT RESEARCH CONFERENCE " APRIL 1998 Poster Presentation 35 INTERPARTICLE POTENTIAL IN A l=D MANY=BODY COLLOID Nathan Mueggenburg, Matthew T. Dearing, and Gabriel Spalding* Physics Department, illinois Wesleyan University We present a study of the interparticle potential in a I -dimensional colloid. Using a scanning optical tweezer we fabricate a line trap confining many silica spheres one-micron in diameter. Optical forces result from an interaction between induced dipoles within each sphere and scattered laser light from neighboring spheres l .  These interactions create a potential which induces a preferred separation between spheres. Furthermore, many-body effects may alter the interactions in colloidal systems2. Brownian effects cause random motion of the particles within the trap allowing the system to exhibit a range of interparticle separations. Using statistical analysis we look at the distribution of separation distances as a means of exploring the interparticle potential in the I -dimensional, many-body conoidal system. IBums, Michael M., et al. Science, 249, 749 ( 1990) . 2Larsen, Amy E. and Grier, David G. Phys. Rev. Let., 76, 3862 ( 1996) . 

Interparticle Potential in a 1-D Many Body Colloid

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Interparticle Potential in a 1-D Many Body Colloid

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