Abstract
We have developed a high-bandwidth technique for active 2-particle microrheology (AMR) with which we can probe linear and nonlinear responses of soft materials. Micron-sized colloidal probe particles are driven by an oscillating optical trap, and the resulting correlated motions of neighboring particles are detected by laser interferometry. Lock-in detection at the driving frequency and at its second harmonic makes it possible to measure the linear and the non-linear response of the embedding medium at the same time. We demonstrate the sensitivity of the method by detecting a second-harmonic response in water which is of purely geometric origin and which can be fully understood within linear hydrodynamics.
| Original language | English |
|---|---|
| Title of host publication | Optical Trapping and Optical Micromanipulation IV |
| DOIs | |
| Publication status | Published - Dec 1 2007 |
| Event | Optical Trapping and Optical Micromanipulation IV - San Diego, CA, United States Duration: Aug 26 2007 → Aug 29 2007 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 6644 |
| ISSN (Print) | 0277-786X |
Other
| Other | Optical Trapping and Optical Micromanipulation IV |
|---|---|
| Country | United States |
| City | San Diego, CA |
| Period | 8/26/07 → 8/29/07 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
Linear and nonlinear laser-trapping microrheology. / Schmidt, C. F.; Mizuno, D.
Optical Trapping and Optical Micromanipulation IV. 2007. 66440L (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6644).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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TY - GEN
T1 - Linear and nonlinear laser-trapping microrheology
AU - Schmidt, C. F.
AU - Mizuno, D.
PY - 2007/12/1
Y1 - 2007/12/1
N2 - We have developed a high-bandwidth technique for active 2-particle microrheology (AMR) with which we can probe linear and nonlinear responses of soft materials. Micron-sized colloidal probe particles are driven by an oscillating optical trap, and the resulting correlated motions of neighboring particles are detected by laser interferometry. Lock-in detection at the driving frequency and at its second harmonic makes it possible to measure the linear and the non-linear response of the embedding medium at the same time. We demonstrate the sensitivity of the method by detecting a second-harmonic response in water which is of purely geometric origin and which can be fully understood within linear hydrodynamics.
AB - We have developed a high-bandwidth technique for active 2-particle microrheology (AMR) with which we can probe linear and nonlinear responses of soft materials. Micron-sized colloidal probe particles are driven by an oscillating optical trap, and the resulting correlated motions of neighboring particles are detected by laser interferometry. Lock-in detection at the driving frequency and at its second harmonic makes it possible to measure the linear and the non-linear response of the embedding medium at the same time. We demonstrate the sensitivity of the method by detecting a second-harmonic response in water which is of purely geometric origin and which can be fully understood within linear hydrodynamics.
UR - http://www.scopus.com/inward/record.url?scp=42149189936&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=42149189936&partnerID=8YFLogxK
U2 - 10.1117/12.739441
DO - 10.1117/12.739441
M3 - Conference contribution
AN - SCOPUS:42149189936
SN - 9780819467928
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical Trapping and Optical Micromanipulation IV
ER -