The Drude model

[john curl]

SY, if we want to compare Drude to QM, why don't you 'Google' 'graphene conductivity' and 'nanotube resistor' then we can talk about something of substance. I already have nanotube resistors in my office. Graphene is now available.

 

[Steve Eddy]

SY, if we want to compare, why don't you 'Google' 'graphene conductivity' and 'nanotube resistor' then we can talk about something of substance. I already have nanotube resistors in my office. Graphene is now available.

No surprises today.

Just more buzzwords as usual.

*yawn*

se

 

[SY]

I'm pretty familiar with these materials, no need to Google.

Note who has the first patents on using conductive organic polymers to form electronic components.

 

[Steve Eddy]

I'm pretty familiar with these materials, no need to Google.

Note who has the first patents on using conductive organic polymers to form electronic components.

4,498,685

Production of base-type conductive polymers, particularly from the family of conductive polyaniline, by reacting a base-type non-conductive polymer containing carbon-nitrogen linkages, e.g., polyaniline, with an R.sup.+ donor compound, where R is an organic group, e.g., methyl iodide, and forming an electrically conductive polymer in which the R groups are covalently linked to the nitrogen atoms of the polymer.

Inventors: Yaniger; Stuart I. (Palmdale, CA)
Assignee: Lockheed Corporation (Calabasas, CA)
Appl. No.: 06/920,474
Filed: October 20, 1986

se

 

[SY]

Close, but no cigar.

(try 4,822,638)

 

[Steve Eddy]

Close, but no cigar.

(try 4,822,638)

A process for fabricating an electronic device on a non-conductive polymer substrate, particularly from the family of polyaniline, comprises applying a covalent doping agent, such as an R.sup.+ donor compound, where R is an organic group, e.g., methyl iodide, to a preselected portion of a base-type non-conductive polymer substrate containing carbon-nitrogen linkages, and converting such preselected portion of the polymer substrate to an electrically conductive polymer portion, by covalent linkage of the R groups of such donor compound, to nitrogen atoms of the non-conductive polymer substrate. Electronic devices, such as resistors, capacitors, inductors, printed circuits and the like, can be provided by the invention process, in the form of light-weight polymers containing no metal, and which are stable and wherein the conductive portions are non-diffusing.

Inventors: Yaniger; Stuart I. (Palmdale, CA)
Assignee: Lockheed Corporation (Burbank, CA)
Appl. No.: 07/013,306
Filed: February 11, 1987

se

 

[john curl]

Then SY, how does this relate to the DRUDE model of conductivity. Any predictions?

 

[SY]

Conductive polymers do not follow the Drude model. The charge carriers are actually some pretty interesting quasiparticles. For example, polyacetylene's paramagnetism actually decreases as it is doped into conductivity- the charge carriers have no spin! They turn out to be something like solitons. In the heterocycles and aniline systems, the excitations that carry charge are polarons. And all, of course, have a very different effective mass than electrons. And strongly anisotropic behavior.

It's a fun world out there. One doesn't even have to make stuff up.

 

[john curl]

So now things exist that don't follow the DRUDE model. Isn't this the second level of understanding?

 

[SY]

No. The first level of understanding is knowing the approximations of the model, where they're valid, and where they're not. I don't remember how far back that goes, but it was certainly in Kittel when I was an undergrad and you were setting the audio world on fire.

 

[john curl]

I give up. Who cares?

 

[Steve Eddy]

So now things exist that don't follow the DRUDE model.

I don't recall anyone having claimed otherwise. So what's your point?

Isn't this the second level of understanding?

Of understanding what exactly?

se