Author: Maryna Kavalenka

EO with Ag/AgCl electrodes on membrane chip

I tried putting Ag/AgCl electrodes on the surfaces of the membrane for EO pumping. The experiments were done in RIT with Jirachai. In these experiments the goal was to observe the change in liquid droplet volume on the front side

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Electrodes: electrical measurements and EO tryouts

In continuation of work on ultrathin metal electrodes on pnc-Si, I tried changing metal thicknesses at different positions inside the chamber.  In this experiment, on the front side of the 30 nm thick membrane the 22 nm metal layer was

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Metal deposition at different positions

I am trying to deposit metal on the membrane with minimal deposition inside the pores. The image below is an example of how the film quality and thickness change when the sample is positioned at different angles and distances from

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Pnc-Si cross section by FIB and cleaving

1) FIB. I tried to get a cross section of the pnc-Si with FIB with Brian’s help. The results are negative. It looks like the ion beam almost “melts” the membrane and destroys the pores instead of cutting.  The tool

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Measuring membrane thickness in SEM and updates

I tried to measure the thickness of the non-carbonized and carbonized membranes for the paper using SEM. To have a clear cut of the membrane I place the membrane chip upside down on a silicon wafer piece, then bend the

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Separating effects of molecular collisions with pore walls in pnc-Si, carbonized walls effect

The goal here is to see if by using our membrane we can measure and separate different pore wall interaction effects of gas molecules passing through a pore. First, some theory. The flow through every pore of particular aspect ratio

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Making two metal plates on different sides of the membrane

Some time before I noticed that placing the membrane in the metal deposition chamber at slight angle to the incoming metal atoms stream makes thin metal layer only on one side of the pore, shadowing the rest of it. Rotating

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Changes in nanocrystalline structure due to mechanical stress

One of the things that I’ve been working on recently is trying to explain the extreme elasticity of the pnc-Si material which is connected to its nanocrystalline structure. There are two parts in this question. First, how are amorphous or

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Journal club

Presentation jc_9_15_2009_maryna. Paper nano9_30_305304

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Metallized Membranes

The deposited metal thickness is 20nm, consisting of 10nm titanium and10nm gold. Post not finished. sc b020 – 25nm sc b011 sc b01

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