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 of the membrane, due to EO pumping from liquid reservoir on the other side of…
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 deposited from three different positions in the same run. The back sides of all the…
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 the source in the same deposition run. The schematic in the corner of each SEM…
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 also has in-built Pt deposition capability (from organo-Pt compound). So we tried to make the…
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 membrane chip with tweezers so the membrane sticks to the wafer while breaking of the…
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 (L/d) is determined by pore’s transmission probability value (W), which is the probability of the…
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 the membrane sample after the metal layer was deposited on the front and making sure…
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 crystalline phases involved during stretching? Second, does the crystalline phase change under application of mechanical…
Presentation jc_9_15_2009_maryna. Paper nano9_30_305304
The deposited metal thickness is 20nm, consisting of 10nm titanium and10nm gold. Post not finished. sc b020 – 25nm sc b011 sc b01