刚看武夷山老师的博客，http://www.sciencenet.cn/m/user_content.aspx?id=274362，发现我下面这篇文章被录入2008年中国百篇最具影响国际学术论文。

ZnO-based Hollow Nanoparticles by Selective Etching: Elimination and Reconstruction of Metal-semiconductor Interface, Improvement of Blue Emission and Photocatalysis,

 Haibo Zeng,* Weiping Cai, Peisheng Liu, Xiaoxia Xu, Huijuan Zhou, Claus Klingshirn, Heinz Kalt

 ACS Nano 2008, 2, 1661-1670.

ABSTRACT A weak acid selective etching strategy was put forward to fabricate oxide-based hollow nanoparticles (HNPs) using core/shell nanostructures of active metal/oxide nanoparticles as sacrificial templates. ZnO-based HNPs, including pure ZnO, Au/ZnO, Pt/ZnO, and Au/Pt/ZnO HNPs with diameter below 50 nm and shell thickness below 6 nm has been first achieved at low temperature. The diameter, thickness, and even sizes of ZnO and noble metal ultrafine crystals of HNPs can be well adjusted by the etching process. Synchronously, the internal metal/semiconductor interfaces can be controllably eliminated (Zn/ZnO) and reconstructed (noble metal/ZnO). Excitingly, such microstructure manipulation has endued them with giant improvements in related performances, including the very strong blue luminescence with enhancement over 3 orders of magnitude for the pure ZnO HNPs and the greatly improved photocatalytic activity for the noble metal/ZnO HNPs. These give them strong potentials in relevant applications, such as blue light emitting devices, environment remediation, drug delivery and release, energy storage and conversion, and sensors. The designed fabrication procedure is simple, feasible, and universal for a series of oxide and noble metal/oxide HNPs with controlled microstructure and improved performances.

 

    这是一个系列工作中的一部分。之前，我们集中注意力于：非平衡过程形成的纳米颗粒的独特微结构和物理性质。其中一种典型材料是Zn/ZnO芯壳结构纳米颗粒，后期研究过程中采用弱酸处理获得了空心纳米颗粒，进而采用贵金属弱酸获得了贵金属包覆的复合纳米颗粒。这一过程正是颗粒中金属－半导体界面消除与重建的过程，对发光与光催化的性能影响有较大影响。尤其是，贵金属在超薄半导体壳层中的镶嵌将有利于光生电荷的分离，从而构建高比表面积复合光催化剂。

印象中有许多很好的工作没有被录入，因此这篇文章能被录入并不能说明太多，不过还是比较幸运的。非常感谢许多同事和朋友对此工作的支持。

一点点领域促进的意义如下：
1，提出一种简单的方法，获得空心氧化物纳米颗粒，直径10－50纳米左右，壳层厚度2－5纳米左右，可以调控。进一步拓展可以获得贵金属超细颗粒在壳层中包覆的复合空心颗粒，其中贵金属种类，尺寸，含量可在一定范围调控。
2，光催化研究指出，这种结构由于很高的比表面积，较大的贵金属－半导体界面，而具有较高的光催化效率。顺便，也观察了光催化过程中的不稳定性。

 

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