Material is a general term for a chemical substance or a mixture of substances with certain, well defined physical properties.

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“Synthetic wood” from cellulose and lignin?

Is there any research into making wood from its constituents? From what I know, wood is composed of cellulose, hemicellulose, and lignin. We can extract these from raw wood, but is there any way we ...
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What is the temperature at which lava evaporates?

According to this article -> http://ntrs.nasa.gov/search.jsp?R=19660041998 Lava evaporates under natural conditions, but apparently, only a little bit. I'd like to know the temperature at which ...
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Is there any material that does not return/reflect light? [duplicate]

I am looking for a material that is total dark, something that even when you illuminate it with flash light you will not get any light back. it exists? or is it possible to make one such material?
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Hair Gel Derivative

I need a water-soluble, extremely fast drying adhesive gel. My first thought is hair gel. pros: Water Soluble (easily removed)*** most important High viscosity in liquid form ~60 cps Easily ...
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How dangerous are non-soluble trivalent thallium compounds?

I am PhD student in solid state physics. I have been working with a fine powder of a transition metal oxide containing trivalent thallium. The oxide is not soluble in water. In my university, ...
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Why plastic sheets contract when heated?

Why do thin plastic sheets contract when heated, contradictory to the behavior of most other materials ? What are the things going on at the molecular level ?
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List of Piezoelectric Materials which can be made at home?

Hi I would like to know a few examples of materials which exhibit piezo-electricity and are also transparent, and could they be purchased online or synthesized at home with ease. Thanks a lot
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Reduced Graphene Oxide (RGO) Conductivity vs Everything Else

I had a question regarding, as you can see, 'Reduced Graphene Oxide'. Not many people are aware of this material since pristine 'graphene' gets all the attention. Reduced Graphene Oxide (RGO), is the ...
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26 views

Behaviour of oleophobic and hydrophobic object in an oil and water solution

I am wondering what would happen if I put a small (between $\mathrm{5mm}$ and $\mathrm{1\mu}$, density between $\mathrm{1}$ and $\mathrm{2\: g/mL}$) item with both oleophobic and hydrophobic ...
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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 ...
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28 views

Band Gap for Semiconductors

What is the limiting value of band gap(in eV) that makes a material semiconductor? Or what is the value of band gap that separates insulator and semiconductor?
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What elastic polymeric material look like at molecular level?

I think there are few crosslinks in elastic material. So probably, the material would look like not so dense, maybe even transparent. I received this question from my collegue and have difficulty in ...
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37 views

Why there is a non-linear trend on the melting points for period 2 elements, especially Na to Si?

Using the knowledge of periodicity from high school cannot explain this, what it tells me is just metallic bonding. The model of delocalised electron from a metallic lattice can explain the increase ...
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Knowing about Sensor Film Kit

I am very new to this site and this is my first ever question. I want to know what is this black material in this sensor film kit. I am creating a weight sensor by using this very sensor kit. Now I am ...
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Would graphite stick to basalt cooled from its molten state in a graphite mold?

Molten metal that is poured into a graphite mold pops out easily once it has cooled. Would basalt poured the same way pop out just as easily? I am particularly interested in lunar basalt, if that ...
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19 views

Recipe for growing moissanite?

Moissanite is a silicon-carbide, diamond-like gemstone, that is lab-grown. The patents have already expired (1,2,3). Where can I find a recipe?
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25 views

How do polymer properties change when moving from bulk to nanosized fibers?

Polymer are used in many applications, but how do the properties change when they are fabricated on the nanolevel? Im especially interested in polymeric and polymer derived nanofibers, and why they ...
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51 views

Difference between calcination and pyrolysis

What is the difference between calcination and pyrolysis? I have polymeric materials in mind specifically I understand they both involve heat treatment but each under a different type of atmosphere, ...
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Is there any porous material that can have narrow parallel and “perfectly straight” cavities/holes through it (or bored through it)?

I'm basically looking for a material that can allow photons to pass through its cavities, but only those photons that travel at an angle (almost) exactly perpendicular to the materials surface. ...
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163 views

Why is gold so popular in nanotechnology?

Gold is a very popular metal in nanotechnology. It is often used as a substrate in electronic applications, as a core of functionalized nanoparticles, and more. Why is gold so attractive? Why are ...
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Shock induced illuminated material

Any suggestions for a shock induced material that would illuminate and be capable of being visible for a minimum of three seconds? Non-toxic and minimal heat production would be optimal.
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Does freezing tights make them more durable?

Various blog posts and articles suggest that freezing a pair of tights will make them last longer. From a blog named Eclipsed Moon: Put your tights in the freezer. I thought that this was ...
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Why are domains formed in ferromagnetic materials below curie point?

Why domains are formed in ferromagnetic materials below curie point and why domains are aligned in the same direction above curie point?
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How high is the variance of the shore D hardness for a synthetical resin?

I realize that the variance of hardness depends on the homogenity of the polymer throughtout a specific sample, the polymer itself and on the measurement, but maybe there are typical values. To be a ...
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How to minimize surface adsorption by choice of material?

I need to do buoyancy experiments in vapours consisting of organic molecules in air using a microbalance. This involves measuring the change in weight of a sealed glass sphere when exposed to the gas. ...
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What makes most all-carbon materials so strong?

For some reason, stuff made entirely of carbon atoms tends to be incredibly strong, beyond just about anything else known to material science. It doesn't seem to matter too much how the carbon is ...
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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 ...
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Products of silicate synthesis

I'm attempting to make a hard refractory cement to apply over kiln brick made of sodium silicate and Perlite. This creates a very good kiln brick, however they are susceptible to abrasion. I've been ...
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What are Hydraulic Properties of Glass?

I am trying to look at hydraulic properties of sand and glass. Glass is made of $\ce{SiO2}$ which is sand and I am looking to replace sand by crushed powdered glass in garden landscapes and plants. I ...
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75 views

What structural property creates stickiness?

Recently, me and my mom parked her car in a spot reserved for customers of a super expensive shoe store while going to get some also fairly expensive drinks at Starbucks. When we came back, an ...
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20 views

What materials are used to thermally imprint graphics on cotton fabrics?

For example t-shirt shops transfer color masks onto the cotton fabric using a thermal press. What materials are those masks made of?
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Is there a specific chemical property or concept that explains/predicts the triboelectric series?

Is there a chemical property (perhaps electron affinity?) that can be used to predict where a substance would fall in a triboelectric series such as this one? Or would the cause of the charge ...
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39 views

Fermi Level of an alloy

How could one calculate the Fermi level of a copper-nickel alloy? They are both structurally face-centered cubic, however how would this structure affect the Fermi level of the individual atom or the ...
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Reverse-Engineer a material

Let's say I am seeking to find an alloy with certain properties, is there any method or process that enables one to backtrack from desired properties to actual structure and composition of a material? ...
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Electrical properties of 2D materials

This is regarding to the newly-discovered 2-D materials that can support electron flow, such as phosphorene and transition metal dichalcogenides. How do they conduct electricity? I also read that ...
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Is there an adhesive with an on-and-off switch?

Is there a strong adhesive (can carry about 2 kg in the air) that can be switched on or off, for example with electricity or changing the acidity of the surrounding medium, though I prefer electricity ...
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101 views

What determines the elastic limit of a substance?

from what I know, the elastic limit of a substance is the maximum amount of stress/force/pressure (a bit of confusion on my behalf here) a substance can withstand and still return to its original ...
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63 views

How to calculate mass of nanomaterial grown on a substrate

I'm growing graphene on copper substrates and need to know the mass. The graphene is grown via chemical vapor deposition; amounts of reactants are not completely known. The best approach I've thought ...
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Why are so many ionic compounds brittle?

Even when ionic compounds are strong (e.g. rubies and sapphires), they are neither malleable nor ductile in the slightest, and if sufficient stress is put on them, they will shatter, not bend. Why is ...
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Palladium Nanocube

What is the relative permittivity and relative permeability of a palladium nanocube? If I change the size of this $\ce{Pd}$ nanocube, will these values be changed or remain the same?
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What is “Steel Reinforced Epoxy”

No, it's not epoxy for reinforcing steel. It's "steel reinforced epoxy." http://www.jbweld.com/products/j-b-weld-twin-tube How in the world does steel reinforce epoxy? I can understand how carbon ...
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138 views

How are piezoelectric crystals made?

I want to know how the powdered formed of piezoelectric material is converted to crystal like used in quartz watches. I know that some more chemicals are mixed with the material and then it is pressed ...
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283 views

What happens if a polymer's length is equal to its persistence length?

So, I've been looking into polymer chemistry to model breaking polymers for a biological model, and I've been a bit stumped by the concept of persistence length. I know that if a polymer is ...
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How to distinguish open-pored polymer foam and foam with closed pores?

I was looking at two foam materials, where I had expected one to have closed pores. Unfourtunately, the microscope was showing the upper layer of cut cells the same in both cases with no indication ...
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Will fire corrode stainless steel?

I am considering building a stove out of stainless steel. I want to us stainless steel because the stove will have a double outer jacket to pass water through and heat it. Will a wood fire sitting ...
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195 views

Jahn-Teller Metal : The new state of matter

Recently it came in the news that scientists have discovered a new state of matter called Jahn-Teller metal. I tried reading up on it but couldn't understand it clearly. Please explain in simple ...
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change in state (sublimation and deposition)

I am slightly confused as to how I should think of changes in state (especially sublimation and deposition). Should I think of sublimation and deposition as skipping the liquid phase (fig 1) or should ...
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Is there an otherwise liquid material that has angle of repose?

I wonder whether there is a material which consists from individual molecules (that is, fluid), which has its angle of repose thus exhibiting propertes of a powder?
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272 views

What is the world's finest powder substance?

What is the world's finest powder substance that has the smallest granules but remains solid?
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What chemical characteristics give types of steel their properties?

I am a mechanical engineer, and just like everyone else I had classes on the crystal structure of metals, phase diagrams, and the various heat treatments. However, even after diving back into that ...