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conquerus銅蟲 (正式寫手)
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[求助]
動(dòng)態(tài)光散射(DLS)中的intensity
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| 用動(dòng)態(tài)光散射測量納米粒徑,然后采用的intensity的結(jié)果,如果用英文寫出來,應(yīng)該如何寫呢?Size calculation is determined by intensity?這樣對嗎? |
金蟲 (小有名氣)
銅蟲 (正式寫手)
木蟲 (著名寫手)
鐵桿木蟲 (正式寫手)
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用Z-average hydrodynamic diameter。 根據(jù)Malvern zetasizer的手冊:“It is important to note that this mean size (often given the symbol Z or z-average) is an intensity mean. It is not a mass or number mean because it is calculated from the signal intensity.” 所以,根據(jù)強(qiáng)度計(jì)算得到的粒徑,就是z-average size。 手冊在這里可以下載: http://www.nbtc.cornell.edu/faci ... asizer%20Manual.pdf 除此之外,使用DLS結(jié)果的時(shí)候,需要注意: Z-average size (also known as the “cumulants mean”) In dynamic light scattering this is the most important and stable number produced by the technique. This is the size to use if a number is required for quality control purposes. It will only be comparable with other techniques if the sample is monomodal (i.e. only one peak), spherical and monodisperse (i.e. no width to the distribution), and the sample is prepared in the correct dispersant. In any other case, the Z-average size can only be used to compare results with samples measured in the same dispersant, by the same technique, i.e. by Dynamic Light Scattering (DLS). |

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