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AlCoCsFe (pipette,no bias)

Submitted by elynna youm on Mon, 02/15/2010 - 13:13
Metals: Al, Co, Cu, Fe
Electrolyte pH: Basic

Comments:

electrolyte:NaOH
-glass fired for 24 hours at 500C
-molarity of metals: .35M

AlCoCsFeAlCoCsFe

Concentration Chart for AlCoCsFeConcentration Chart for AlCoCsFe


Positive Bias: Negative Bias:
No Image Available No Image Available
No TXT File Available No TXT File Available
Rating: Not Scanned Rating: Not Scanned

scanning problems?

Submitted by cmarkum on Mon, 02/15/2010 - 14:02.

Have you thought about why this picture seems to be blurry? Could you post a picture of the template you used as well? So we know how you set up your experiment? Other than it being blurred, it looks like there are some interesting things to look at with this scan!!!

Blurry spots

Submitted by billyjmc on Thu, 03/11/2010 - 01:19.

I think the blurry spots are artifacts from multiple reflections off of glass. It looks like the laser reflected off of the FTO plate, and again off of the front glass wall of the cell to strike the real hot spots. This makes sense based on our scanning station arrangement; the beam strikes the center of the glass plate squarely.

Let's see if this diagram makes sense:

....|......|
....|......|
....|......|
....|......|
....|......|
....|......X <--- Real Spot on FTO Glass
....|...../X
....|..../.|
....|.../..|
....|../...|
....|./....|
....|/.....|
....|\.....|
....|.\....|
....|..\...|
....|...\..|
....|....\.|
....|.....\| <---- "Phantom" Spot on FTO Glass
....|...../|
....|..../.|
....|.../..|
....|../...|
....|./....|
....|/.....|
....|......|
.../|......|
../.|......|
./..|......|
/...|......|

Meh. Probably should have just used MS Paint. Anyhow, I think it's clear enough.

-----
Billy McCulloch
Ozerov Research Group
Texas A&M University

Alignment?

Submitted by jennyschuttle on Wed, 03/17/2010 - 17:03.

Are you sure that the FTO glass was aligned straight? We typically see refelctions when something isn't properly aligned.

We make an effort to keep the

Submitted by billyjmc on Mon, 05/03/2010 - 11:09.

We make an effort to keep the cell and plate perpendicular to the incoming laser. You can see how the "phantom" spots are located radially from the center and aligned with their respective real hotspots, indicating that the plate was centered and perpendicular to the incoming laser. The intensity of the spots is probably exaggerated by the use of a high contrast false-color image, but there's clearly a non-negligible amount of "phantom activity".
Maybe the effect could be reduced by putting the plate even closer to the front window of the cell? We could experiment with this.

-----
Billy McCulloch
Ozerov Research Group
Texas A&M University