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Bubble Assemblies of Nanocrystals: Superlattices without a Substrate
The Journal of Physical Chemistry Letters ( IF 5.7 ) Pub Date : 2017-09-25 00:00:00 , DOI: 10.1021/acs.jpclett.7b01595
Yixuan Yu 1 , Adrien Guillaussier 1 , Vikas Reddy Voggu 1 , Daniel W. Houck 1 , Detlef-M. Smilgies 2 , Brian A. Korgel 1
Affiliation  

A method was developed to create free-standing nanocrystal films in the form of solidified bubbles. Bubbles of octadecanethiol-capped gold nanocrystals were studied by in situ grazing incidence small-angle X-ray scattering (GISAXS) to determine how the absence of an underlying substrate influences a disorder–order transition of a nanocrystal superlattice. We find that the presence of the substrate does not significantly change the nature of the disorder–order transition but does lead to reduced interparticle separation and reduced thermal expansion. Bubble assemblies of silicon and copper selenide nanocrystals are also demonstrated.

中文翻译:

纳米晶体的气泡组件:没有基质的超晶格

开发了一种方法来产生固态气泡形式的自立式纳米晶体薄膜。通过原位掠入射小角X射线散射(GISAXS)研究了十八烷硫醇封端的金纳米晶体的气泡,以确定缺乏底层基质如何影响纳米晶超晶格的无序转变。我们发现,基质的存在不会显着改变无序转变的性质,但会导致减少颗粒间的分离和降低热膨胀。还展示了硅和硒化铜纳米晶体的气泡组件。
更新日期:2017-09-25
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