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小木虫论坛-学术科研互动平台 » 材料区 » 微米和纳米 » 合成表征 » 求助关于量子点的问题
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3006213050

铁虫 (小有名气)

[求助] 求助关于量子点的问题

请问各位高手，有哪一种量子点是在500激发，发射峰在600+的位置的
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1楼 2012-11-15 19:29:55
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sally208

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5楼: Originally posted by sally208 at 2012-11-16 08:21:40
I think it is just a matter of excitation efficiency at different wavelength. It is normal that he more bule the excitation wavelength you choose, the lower brightness will the QDs be. Once you have ...

a mistake in above reply:
... the more blue the excitation wavelength you chose, the higher brightness will the QDs be ...
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6楼2012-11-16 18:25:24
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sally208

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【答案】应助回帖

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3006213050: 金币+10, ★★★很有帮助 2012-11-16 09:10:40
Since semiconductor QDs possess a wide excitation range, thus as soon as you can have QD with emission above 600 nm, they can serve your purpose '量子点是在500激发，发射峰在600+的位置'.
So you have many choices, such as CdTe, CdSe QDs, you just need to control their core size. Few examples in the literature: http://pubs.rsc.org/en/Content/ArticleLanding/2012/NR/c2nr31809a ; http://pubs.rsc.org/en/Content/ArticleLanding/2011/NR/c1nr10933b ; http://pubs.rsc.org/en/Content/ArticleLanding/2011/NR/c1nr10218d ...

Commercially available Qds from Invitrogen: http://www.invitrogen.com/search ... p;resultsPerPage=15
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2楼2012-11-16 00:51:33
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星汉纳米技术

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3006213050: 金币+5, ★★★很有帮助 2012-11-16 09:10:46
量子点的激发光谱很宽，只要发射是在600nm就可以了。可用CdSe/ZnS
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3楼2012-11-16 08:48:34
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3006213050

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2楼: Originally posted by sally208 at 2012-11-16 00:51:33
Since semiconductor QDs possess a wide excitation range, thus as soon as you can have QD with emission above 600 nm, they can serve your purpose '量子点是在500激发，发射峰在600+的位置'.
So you have  ...

Thank you for your useful reference. As we know, the emission of QDs can be near- infrared. However, the excitiation range usually was 400-480 nm. such as your ref.2. Making the 500 nm excitaion was a big problem for me. I wish you can give me some advices.
                                                              Sincerely yours.
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4楼2012-11-16 09:06:51
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