An intrinsic uncertainty in particle mass sensing with the suspended microchannel resonator results from variation in a particle's position near the free end of the resonator. To circumvent this error we employ the second flexural bending mode. This mode exhibits additional frequency peaks while particles pass over the antinode, a point where the frequency shift is insensitive to the lateral position of the particle. We measure polystyrene beads with the first and second modes and confirm that the second mode sensing provides a narrower mass histogram. For 3 μm diameter beads, second mode sensing at the antinode improves the coefficient of variation in buoyant mass from 1.76% to 1.05% for population measurements and from 1.40% to 0.53% for a single trapped particle.
Skip Nav Destination
Article navigation
February 2011
Research Article|
February 17 2011
High precision particle mass sensing using microchannel resonators in the second vibration mode
Jungchul Lee;
Jungchul Lee
a)
Biological Engineering Department,
Massachusetts Institute of Technology
, Cambridge, Massachusetts 02139, USA
Search for other works by this author on:
Andrea K. Bryan;
Andrea K. Bryan
Biological Engineering Department,
Massachusetts Institute of Technology
, Cambridge, Massachusetts 02139, USA
Search for other works by this author on:
Scott R. Manalis
Scott R. Manalis
b)
Biological Engineering Department,
Massachusetts Institute of Technology
, Cambridge, Massachusetts 02139, USA
Search for other works by this author on:
a)
Present address: Department of Mechanical Engineering, Sogang University, Seoul 121-742, South Korea.
b)
Electronic mail: scottm@media.mit.edu.
Rev. Sci. Instrum. 82, 023704 (2011)
Article history
Received:
June 24 2010
Accepted:
December 10 2010
Citation
Jungchul Lee, Andrea K. Bryan, Scott R. Manalis; High precision particle mass sensing using microchannel resonators in the second vibration mode. Rev. Sci. Instrum. 1 February 2011; 82 (2): 023704. https://doi.org/10.1063/1.3534825
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Could not validate captcha. Please try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00
Citing articles via
Related Content
Double antinode excited quartz-enhanced photoacoustic spectrophone
Appl. Phys. Lett. (January 2017)
Nodes and Antinodes in Two-Color Chladni Figures
Phys. Teach. (September 2021)
Modes, Nodes, and Antinodes
American Journal of Physics (March 1952)
Rapid mixing in microchannel using standing bulk acoustic waves
Physics of Fluids (December 2019)