Liquid with changeable colour according temperature

Roscal · 08-09-2002, 08:19 AM

Is somebody knows a liquid which change colour according to the temperature (immediatly) in a range of 20°C-40°C with a big palette of colours ??.
It could be interesting for tuning and beauty especially

(or to view thermal exchange into a acrilik bloc

)
I have made research on Google but no results. Is a such liquid exist at least ?

.
Chemists in the room

?

WebMasta33 · 08-09-2002, 10:16 AM

It's not so much one single liquid that would do that, but you'd have to have several non-reactant liquids. Then what would need to happen, is that each one operates within a certin thermal band, and then it goes clear again.

But as to what does that.... I have absolutly no clue.

Sanjuro · 08-09-2002, 12:27 PM

makes me wonder whats in those tape-like fish tank thermometers. If they are liquid then i'd buy a whole box of them and suck it out with a syringe

nexxo · 08-09-2002, 01:49 PM

To quote www.howthingswork.virginia.edu :

Quote:

Those thermometers use liquid crystals to measure temperature. More specifically, they use chiral nematic liquid crystals--long asymmetric molecules that arrange themselves in orderly spirals in the liquid. When light strikes these spiral structures, some of it reflects. But the reflection is strongest when the light's wavelength is an integer or half integer multiple of the spiral's pitch--the distance between adjacent turns of the spiral. Since light's wavelength is related to its color, the light reflected by these liquid crystals is colored. Because the pitch of a chiral nematic liquid crystal changes with temperature, so does its color. Slightly different liquid crystals are inserted behind each number on the thermometer so that each number becomes colored at a different temperature.

As a liquid, liquid crystal looks like a sort of cloudy water. No pretty colour changes with temperature change, unfortunately.

Shame, it would be a great idea...

airspirit · 08-09-2002, 05:14 PM

A hybrid computer/mood ring?

Limeygreg · 08-10-2002, 09:01 PM

I'vee been looking for such a liquid for a while - haven't found anything yet, liquid crystal seems to be the only "liquid" that does it.

08-09-2002, 08:19 AM	#1
Roscal Cooling Savant Join Date: Apr 2002 Location: North of France Posts: 198	Liquid with changeable colour according temperature Is somebody knows a liquid which change colour according to the temperature (immediatly) in a range of 20°C-40°C with a big palette of colours ??. It could be interesting for tuning and beauty especially (or to view thermal exchange into a acrilik bloc ) I have made research on Google but no results. Is a such liquid exist at least ? . Chemists in the room ?

08-09-2002, 10:16 AM	#2
WebMasta33 Cooling Savant Join Date: Dec 2001 Location: Nebraska Posts: 526	It's not so much one single liquid that would do that, but you'd have to have several non-reactant liquids. Then what would need to happen, is that each one operates within a certin thermal band, and then it goes clear again. But as to what does that.... I have absolutly no clue. __________________ ========== --Soyo KT333 DRAGON Ultra (Platinum Edition) --AMD 1.4 @ 1.54 (11x) --768mb of PC2100 (@140FSB) --Asus v8200 GeForce3 @ 210/490 --Maxtor 40gb Quiet + 2 IBM 40gb 60GXPs (removable) + 8gb WD --Audigy --Maze 3, DD Gf3 block, 2x BIX, Eheim1250 ===========

08-09-2002, 12:27 PM	#3
Sanjuro Cooling Neophyte Join Date: Sep 2001 Location: Port Coquitlam, BC Posts: 74	makes me wonder whats in those tape-like fish tank thermometers. If they are liquid then i'd buy a whole box of them and suck it out with a syringe __________________ Nothing to call home about...

08-09-2002, 05:14 PM	#5
airspirit Been /.'d... have you? Join Date: Jul 2002 Location: Moscow, ID Posts: 1,986	A hybrid computer/mood ring?

08-10-2002, 09:01 PM	#6
Limeygreg Cooling Neophyte Join Date: Aug 2002 Location: Los Angeles, CA. Posts: 20	I'vee been looking for such a liquid for a while - haven't found anything yet, liquid crystal seems to be the only "liquid" that does it.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)