All Questions
Tagged with surface-chemistry materials
13 questions
10
votes
4
answers
4k
views
How does polydimethylsiloxane stick to glass?
Polydimethylsiloxane (PDMS) is the main ingredient in Rain-X, a treatment that adheres to windshields.
How does PDMS adhere to class? It can't form covalent Si-O bonds with glass, according to one ...
- 19.2k
6
votes
1
answer
691
views
What, if any, are the differences between hemiwicking and wicking?
I'm encountering these two terms, but their uses seem to be different, and there's little documentation out there defining the terms.
Here is an example definition I've found of Wicking:
Wicking ...
- 4,543
4
votes
1
answer
100
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Which reaction occurs in calcium vanadate when it comes in contact with water?
I am a physics student currently studying the electrical properties of $\ce{CaVO3}$ and I have noticed that the surface of my thin film samples, which were originally smooth and transparent, now have ...
- 41
4
votes
0
answers
67
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What does "acidic" mean in an article on hydrogen boride nanosheets?
From Rojas et al. [1] (emphasis mine):
On the other hand, we found that proton exchange with HB occurs in water with the estimated $\mathrm{p}K_\mathrm{a}$ of $3.5\pm 0.2,$ even after reactive sites ...
- 49
3
votes
1
answer
689
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Substances comprised of large molecules are liquids at room temperature?
I am looking for compounds that are liquid at normal temperatures and are physically very large, to be used in an ellipsometer adsorption experiment. I am currently working with decane. The candidates ...
- 1,836
3
votes
1
answer
3k
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What is the definition of porous materials?
Is there a consensus on scientific definition of porous materials? There are many definitions out there which do not seem accurate enough:
from wikipedia (accessed July 2017):
A porous medium or a ...
- 944
3
votes
0
answers
299
views
A surface with variable roughness
As you may know, wettability is a characteristic of each surface which determines what the contact angle would be when a droplet is put on the surface (see here for more info). Surface roughness has a ...
- 367
1
vote
2
answers
255
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How do we determine if some metal will undergo passivation under suitable environment?
The passivity of certain metal fall in order:
$\ce{Ti->Al->Cr->Be->Mo->Mg->Ni->Co->Fe->Mn->Zn->Cd->Sn->Pb->Cu}$
Can we predict the order of passivation ...
- 41
1
vote
1
answer
100
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Can Ferrofluids vaporise to gaseous state and Condense back to liquid state and do it many times over? [closed]
Here is the Link for Ferrofluids for basic idea. After going through this Wiki link, probably many people will come to a conclusion like when Ferrofluid boils, its carrier liquid vaporises and nano ...
- 221
1
vote
0
answers
44
views
Are oxides of sulphur and carbon adsorbed into limestone/marble?
Oxides of sulphur and carbon are commonly present in the atmostphere in areas close to industries, can such oxides get adsorbed into the surface of limestone and marble and cause discolouration and ...
- 99
0
votes
1
answer
85
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What eco-friendly substance can I use to write and erase on a wall for UV glowing without detection in daylight?
I rent an office and want an alternative to a whiteboard and continual dry-erase marker purchases.
I can shut out the light and use the surface under UV lamps only, that's fine.
Commonly listed ...
- 101
0
votes
0
answers
48
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How is ECR (Electron Counting Rule) done in a structure?
I've been told how to apply the ECR to GaAs{001}(2×4) in my lectures but it makes no sense to me and I don't seem to be able to find any other sources that explain this. (This is a further question on ...
- 109
0
votes
0
answers
67
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Could someone advise me on sources for crystallography and surface sciences?
I'm a physicist learning crystallography and surface science on the side of my research and I came across the concepts: surface reconstruction in hexagonal materials, unit mesh of surfaces, etc.
I was ...
- 109