21. Madras's research interests are in the area of reaction engineering applied to polymers, supercritical fluids , and catalysis. 22. The supercritical fluid technology consistently produces particle sizes of between 50 and 100 nanometers or smaller, Foster says. 23. Solubility in a supercritical fluid tends to increase with density of the fluid ( at constant temperature ). 24. :If you compress carbon dioxide enough it becomes a supercritical fluid , with properties of a liquid and a gas. 25. Above the critical temperature, the liquid and vapor phases are indistinguishable, and the substance is called a supercritical fluid . 26. Woodhouse points out that there has been considerable delay on a promising area of green chemistry : supercritical fluids . 27. :: : : The behavior of supercritical fluid is still something I don't have a good intuitive sense for. 28. Therefore, nitrogen ( or compressed air ) in a gas cylinder above this pressure is actually a supercritical fluid . 29. The supercritical fluid -liquid-solid growth method can be used to synthesize semiconductor nanowires, e . g ., Si and Ge. 30. Earth has density 5.5, liquid nitrogen 0.807, and I wouldn't expect much different from a supercritical fluid under high pressure.
