GIX Microplotter II

GIX Microplotter II
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The SonoPlot® GIX Microplotter II is a precision picoliter fluid dispensing system for
the microarray and polymer electronics markets with significant advantages over
existing products in deposited feature size and type, regularity of volumes
dispensed, and flexibility for the user.

The core of the Microplotter is a dispenser that uses controlled ultrasonics to deposit
fluid in a noncontact manner. This patented technology can produce picoliter
droplets that form features on a surface as small as 5 μm wide. When combined with
automatic surface height calibration, coefficients of variability for deposited feature
diameters as small as 10% can be achieved. A wide range of fluids can be used,
including aqueous solutions and many organic-solvent-based mixtures. Fluids that
other dispensers struggle with, such as saturated solutions for MALDI-ToF matrices,
or fluids with viscosities up to 450 cP, can be deposited with ease. The ultrasonic
pumping action is also an efficient cleaning mechanism for quickly depositing many
solutions sequentially.

In addition to spots, the GIX Microplotter II can draw true continuous features, such
as lines, arcs, and bends. These are uniform elements, not made from overlapping
droplets like other technologies, and are particularly well-suited to the polymer
electronics field.

Technical Specifications

Feature Size5 um - 200 um
Feature TypesDroplets and contiguous lines, arcs and bends
Deposition Volume> 0.6 pL
Deposition VariabilityAs low as 10%
Viscosity< 450 cP
Positioning31 x 30 x 7 cm (X, Y, Z axes), 5 um resolution
CalibrationAutomatic surface height calibration
CameraFirewire with digital video capture
ComputerIncluded, running Mac OS X (included)
SoftwareSonoGuide and SonoDraw, preinstalled on computer
Dimensions70.6 x 64 x 55.9 cm (27.8 x 25.2 x 22 in.)
Weight59 kg (130 lbs)
Power3.0 A for 100-120 V or 1.5 A for 220-220 V

Demonstration Videos

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Technology

Researchers at the University of Wisconsin have found that the application of ultrasonic vibrations within a small hollow dispenser can lead to a gentle pumping action. This pumping action is highly controllable, and when coupled with a dispenser having a very sharp tip, can lead to the production of picoliter droplets of fluid. These droplets, when dispensed onto a surface, result in spots as small as 5 microns across.

References

B.J. Larson, S.D. Gillmor, and M.G. Lagally Controlled deposition of picoliter amounts of fluid using an ultrasonically driven micropipette Review of Scientific Instruments 75, 832-836 (2004)
B. J. Larson PhD thesis, University of Wisconsin-Madison University of Wisconsin-Madison (2005)
H. Cheun, P. P. Rugheimer, B. J. Larson, P. Gopalan, M. G. Lagally, and M. J. Winokur Polymer light emitting diodes and poly(di-n-octylfluorene) thin films as fabricated with a microfluidics applicator Journal of Applied Physics 100, 073510 (2006)