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How much energy is thermodynamically required to concentrate $CO_2$ from one liter of air? $CO_2$ concentration is 400ppm, or 0.4%. 1l of air is 1/22.4 or 44mMol. From wikipedia, the entropy of mixing is: $\Delta_{mix} S = n R (x_1 ln(x_1) + x_2 ln(x_2))$ where $x_1$ and $x_2$ are the fraction of air and $CO_2$ (0.996 and 0.004) This works out to $9.5e3 J/K$ . At STP, 300K, this means you need only about $2.9 J$ to extract the carbon dioxide. A car driving 1 km emits about 150g carbon dioxide. This is 3.4 moles, which will diffuse into 852 moles of air, or 19e3 liters of air (19 cubic meters). To pull this back out of the air then you'd need at minimum 55.3 kJ. This is not much at all  a car produces 100kW mechanical power, or 100kJ every second, and presumably it takes a minute to drive that 1km. But such perfectly efficient purification is not possible.  
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PMID21360044 Robust penetrating microelectrodes for neural interfaces realized by titanium micromachining
 
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PMID27791052 Ultrathin, transferred layers of thermally grown silicon dioxide as biofluid barriers for biointegrated flexible electronic systems
 
{1385}  
Method of electropolishing tungsten wire US 3287238 A
 
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ref: 0
tags: iridium oxide nanotube intracellular recording electroplate MEA
date: 02222017 22:41 gmt
revision:0
[head]


PMID24487777 Iridium oxide nanotube electrodes for sensitive and prolonged intracellular measurement of action potentials.  
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Improvement in the adhesion of polyimide/epoxy joints using various curing agents
 
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Interfacial adhesion of polymeric coatings for microelectronic encapsulation
 
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From the New Yorker, Feb 25:
