This is a continuation of the initial experiments testing the possibility of creating porous Si membranes with thicknesses ranging from 50 to several hundred nm, and mean pore diameters from ~50-200 nm. As suggested, we’ve started using 200 µm thick…

This post relates to the ongoing project and potential grant between Integrated Nano-Technologies, Simpore, and NRG. The goal of my research is to show that our membranes can be integrated into Nano-Technologies’ device. Our membranes must be able to filter…

We are proposing a novel method for the fabrication of porous thin-film silicon membranes. It has been shown that metallic nanoparticles on the surface of silicon submerged in a solution of hydrofluoric acid and hydrogen peroxide will bore holes into…

Continuation of the work with the Borkholder group (see this post). We put together a couple of videos of EO flow in the streaming potential cell today.  Runs were performed using Ag/AgCl painted wires at ~2.5 V.  Lower voltages weren’t…

Last week, I did another two wafers with different top oxide thicknesses to verify my hypothesis about the top oxide thickness effect on pores. The wafers were 20/15/03(bottom/middle/top) and 20/15/40. According to the hypothesis, the porosity of 20/15/03 would continue…

A long time ago, Charles did Asymmetrical Oxide Experiment to test how the asymmetrical oxide affects the pores, see Asymmetrical Oxide Experiment. He deposited three structures, which were 40/15/40, 40/15/20 and 20/15/20. It showed that when the thickness of top…

This is my attempt to summarize where we are with our investigation into the use of membrane arrays in high throughput screening. The effort is known colloquially as the ‘Harold Smith Project’ because the model protein system comes from Harold…

Today I brought membranes and the streaming potential device to David Borkholder’s lab at RIT.  His students and I set up an initial low voltage experiment.  They will continue to test the device for flow rates and back pressures.  Here…

In the past, we have seen allyl alcohol treatment on silicon chips helps retain a low contact angle longer than a purely plasma treated sample does. This helps us maintain gold flow in a sepcon format for a longer period…