Makerware 3d print Preview
One neat feature of the Makerware software is to visualize the printed layers before actually printing them. You can catch a lot of errors with this feature; I highly recommend it.
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Importing Gasket Geometries to Silhouette from Sketchup
We currently use Adobe Illustrator to design silicone gasket geometries for our microfluidic devices. Here is a quick way to do a similar thing from sketchup. The advantage of this procedure is that you can create a complete 3d model of your device and export different snapshots to the 3d printer for bulk fabrication and a…
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Animations with Sketchup
Sketchup is a great tool for showing off your microsystem ideas, complete with animation capabilities. However, it cannot intrinsically move objects around, show how water flows in a channel, or insert pieces into a slot, which are useful for understanding how a microsystem can be assembled. Keyframe Animation is a plugin for sketchup that…
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Permeance tests with new Omega rotameter
Yaron has acquired an Omega rotameter (FL-3803ST) with interchangeable flow tubes. The tubes operate in three different ranges low (6-61 mL/min, 042-15-N), medium (150-1,682 mL/min, 082-03-N), and High (1,000-23,752 mL/min, 034-39-N). I’ve attached an excel file with the calibration data plotted. We fit the curves with polynomial trendline to get equations. Also in the workbook…
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SOP for bonding of PDMS to NPN
I’ve written a quick SOP document reflecting the procedure that resulting in successful permanent PDMS-NPN bonding. The procedure described in this document has not been optimized and may include unnecessary or otherwise sub-optimal steps. These steps reflect the steps that WERE taken to achieve a successful bond, not necessarily the steps that MUST be taken. —…
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Small Animal Model Hemodialysis Set-Up
Sprague-Dawley rats will be purchased from Harlan. These pre-manipulated animals will have been catheterized prior to shipment. We will feed them an adenine rich diet to induce uremia, high levels of urea in the blood. Once uremic, a rat will be connected via blunted needles to the dialysis system. Heparin, or other substances, may be…
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Schematic of Long Term Clearance Test Setup.
This is the setup used for the long term clearance testing. The fraction collector can be set to advance to the next collection tube at set intervals from 1 min to 99 min. I am currently conducting an evaporation test with both PBS and 100% serum. I weighed six collection tubes, two were filled with…
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BBB Device 2.7 Fabrication with Mortar Bonding
Fabricate ITO Electrodes Deposit 2500 Angstroms, ITO, Room Temperature Using Kurt Lesker Sputterer (Use ITO Variable Recipe, takes about 1.5hr) Tape in Microscope Slides and Coverglass into Machined Shadow Mask using Kapton Tape Anneal in Toaster Oven, 450 Fahrenheit, 1hr Drops resistance from > 40 Megaohm to < 5 kohm. Measure from edge of Pad…