GIX Microplotter Desktop

GIX Microplotter Desktop
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The Sonoplot GIX Microplotter Desktop is an entry-level picoliter fluid dispensing system for the microarray and polymer electronics markets that still provides 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 um wide. When combined with automatic surface height calibration, coefficents 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 Desktop 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
Positioning38 x 29 x 5 cm (X, Y, X axes)
Resolution20 um
CalibrationAutomatic surface height calibration
CameraFirewire with digital video capture
SoftwareMac OS X (included), SonoDraw available on Windows & Linux
Dimensions58.4 x 59.7 x 61 cm (23 x 23.5 x 24 in.)
Weight22 kg (48 lbs)
Power2.0 A for 100-120 V or 1.0 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, C. H. Lee, A. Lal, and M. G. Lagally. Methods and apparata for precisely dispensing microvolumes of fluids. U.S. Patent # 6874699 (2005).
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)