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conquerus

铜虫 (正式写手)

[求助] 动态光散射(DLS)中的intensity

用动态光散射测量纳米粒径,然后采用的intensity的结果,如果用英文写出来,应该如何写呢?Size calculation is determined by intensity?这样对吗?
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刘华1818

金虫 (小有名气)

【答案】应助回帖

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感谢参与,应助指数 +1
Meteorの泪: 金币+1, 感谢应助 2013-02-16 18:06:56
conquerus: 金币+2 2013-02-16 20:44:50
不应该这样写吧。你用的什么样的方式做的就写什么方式,这个可以这样写吧, Particle size was characterized by Dynamic Light Scattering.  其他的感觉不用写了吧。希望对你有帮助
2楼2013-02-16 11:38:57
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conquerus

铜虫 (正式写手)

引用回帖:
2楼: Originally posted by 刘华1818 at 2013-02-16 11:38:57
不应该这样写吧。你用的什么样的方式做的就写什么方式,这个可以这样写吧, Particle size was characterized by Dynamic Light Scattering.  其他的感觉不用写了吧。希望对你有帮助

如果想要强调下选用的intensity结果,应该如何说呢
3楼2013-02-16 20:44:38
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sunjy825

木虫 (著名写手)

【答案】应助回帖

感谢参与,应助指数 +1
有个公式的。。。。流体力学半径跟粘度的一个关系。。
公式不记得了。。。呵呵
4楼2013-02-17 12:46:54
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qlzhang

铜虫 (小有名气)

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感谢参与,应助指数 +1
Intensity distribution
5楼2013-02-18 05:13:18
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jiangcj09

铁杆木虫 (正式写手)

【答案】应助回帖

用Z-average hydrodynamic diameter。
根据Malvern zetasizer的手册:“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,根据强度计算得到的粒径,就是z-average size。

手册在这里可以下载:
http://www.nbtc.cornell.edu/faci ... asizer%20Manual.pdf

除此之外,使用DLS结果的时候,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).
6楼2013-04-04 12:25:01
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love-study

至尊木虫 (职业作家)

【答案】应助回帖

Particle size was characterized by Dynamic Light Scattering from the signal intensity
学海无涯
7楼2013-04-04 13:51:59
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