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shikyang

铜虫 (正式写手)

Are you sure?


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引用回帖:
Originally posted by 304297704 at 2009-12-10 14:37:
用粒度仪测Zeta电位.
未洗涤银为负电荷,洗涤后水分散表面带正电荷.

Are you sure about the declaration that after rinsing the Ag nanoparticles charged positively?? I have detected  Zeta Potential of Ag prepared in pure deionized water, the value is -20 ! Something wrong, the equipment? This is important to several of my papers. I hope you can give me some proofs about after rinsing, Ag nanoparticles charge positively.
11楼2009-12-10 16:19:53
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304297704

金虫 (小有名气)


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引用回帖:
Originally posted by shikyang at 2009-12-10 16:19:


  Are you sure about the declaration that after rinsing the Ag nanoparticles charged positively?? I have detected  Zeta Potential of Ag prepared in pure deionized water, the value is -20 ! Some ...

不清楚你是怎样制备的,我得到的实验现象就是这样.改变浓度测多少次都是这样.其实我是希望其表面是负电荷.所以遇到这个问题,我自己都在想办法解决.我想向你请教:测Zeta电位时,你设定的物质参数都是多少?比如:Ag的折射率和吸收率.以及你的粒子粒径?
12楼2009-12-11 12:09:54
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zyh627627

金虫 (正式写手)

资深瓜农


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我也是默认的负电

没有zeta 啊

楼上两位谈论一下

洗涤之后  分散在水里

到底啥电性
一心一用,keepfoolish
13楼2009-12-11 13:00:11
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shikyang

铜虫 (正式写手)

Hello


小木虫(金币+0.5):给个红包,谢谢回帖交流
引用回帖:
Originally posted by 304297704 at 2009-12-11 12:09:

不清楚你是怎样制备的,我得到的实验现象就是这样.改变浓度测多少次都是这样.其实我是希望其表面是负电荷.所以遇到这个问题,我自己都在想办法解决.我想向你请教:测Zeta电位时,你设定的物质参数都是多少?比如:Ag的 ...

I prepared Silver nanoparticles in pure deionized by laser ablation method, which is similar to a physical method. And when I detect the Zeto Potential, it is really -20. And when I apply an electric field, surprisingly, both on the anode and cathode have some Silver structures. It is strange! The parameters when detection the zeta potential is according to the equipment instrument.
14楼2009-12-14 19:53:04
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