Abstract
We have successfully produced size-controlled emulsion droplets on a chip by adjusting the vibration frequency for MMT. The novelty of this work is the fabrication of a thin coplanar Au electrode on the substrate of a microchip to work as a microsensor, and this microsensor contributed to a droplet-generation system with size estimation. When a droplet passes through the microsensor in themicrochannel, it causes a change in the capacitance across a pair of microelectrodes in the microchannel, depending on the size of the droplet. We monitored the change in impedance in real time. The microsensor provided an output voltage proportional to the size of the droplet. The sensor output was observed by an oscilloscope at the primary stage. Manually we estimated the size and set a new actuation frequency for MMT to achieve on-demand and size control of the droplet. Real-time droplet detection was applied in this system. By monitoring the actuation frequency for MMT, size-controlled and ondemand droplet generation could be successfully carried out.
| Original language | English |
|---|---|
| Pages (from-to) | 133-140 |
| Number of pages | 8 |
| Journal | Journal of Robotics and Mechatronics |
| Volume | 24 |
| Issue number | 1 |
| Publication status | Published - 2012 Feb |
| Externally published | Yes |
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Keywords
- Droplet dispensing
- Impedance sensor
- Magnetically driven microtool
- Robot-on-a-chip
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Science(all)
Cite this
On-demand and size-controlled production of droplets by magnetically driven microtool. / Feng, Lin; Kawahara, Tomohiro; Yamanishi, Yoko; Hagiwara, Masaya; Kosuge, Kazuhiro; Arai, Fumihito.
In: Journal of Robotics and Mechatronics, Vol. 24, No. 1, 02.2012, p. 133-140.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - On-demand and size-controlled production of droplets by magnetically driven microtool
AU - Feng, Lin
AU - Kawahara, Tomohiro
AU - Yamanishi, Yoko
AU - Hagiwara, Masaya
AU - Kosuge, Kazuhiro
AU - Arai, Fumihito
PY - 2012/2
Y1 - 2012/2
N2 - We have successfully produced size-controlled emulsion droplets on a chip by adjusting the vibration frequency for MMT. The novelty of this work is the fabrication of a thin coplanar Au electrode on the substrate of a microchip to work as a microsensor, and this microsensor contributed to a droplet-generation system with size estimation. When a droplet passes through the microsensor in themicrochannel, it causes a change in the capacitance across a pair of microelectrodes in the microchannel, depending on the size of the droplet. We monitored the change in impedance in real time. The microsensor provided an output voltage proportional to the size of the droplet. The sensor output was observed by an oscilloscope at the primary stage. Manually we estimated the size and set a new actuation frequency for MMT to achieve on-demand and size control of the droplet. Real-time droplet detection was applied in this system. By monitoring the actuation frequency for MMT, size-controlled and ondemand droplet generation could be successfully carried out.
AB - We have successfully produced size-controlled emulsion droplets on a chip by adjusting the vibration frequency for MMT. The novelty of this work is the fabrication of a thin coplanar Au electrode on the substrate of a microchip to work as a microsensor, and this microsensor contributed to a droplet-generation system with size estimation. When a droplet passes through the microsensor in themicrochannel, it causes a change in the capacitance across a pair of microelectrodes in the microchannel, depending on the size of the droplet. We monitored the change in impedance in real time. The microsensor provided an output voltage proportional to the size of the droplet. The sensor output was observed by an oscilloscope at the primary stage. Manually we estimated the size and set a new actuation frequency for MMT to achieve on-demand and size control of the droplet. Real-time droplet detection was applied in this system. By monitoring the actuation frequency for MMT, size-controlled and ondemand droplet generation could be successfully carried out.
KW - Droplet dispensing
KW - Impedance sensor
KW - Magnetically driven microtool
KW - Robot-on-a-chip
UR - http://www.scopus.com/inward/record.url?scp=84857345715&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84857345715&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:84857345715
VL - 24
SP - 133
EP - 140
JO - Journal of Robotics and Mechatronics
JF - Journal of Robotics and Mechatronics
SN - 0915-3942
IS - 1
ER -