2008年我们在Nanotechnology上发表了一篇文章：Periodically twinned SiC nanowires(Nanotechnology, 2008, 19: 215602)。文章发表后，被IOP网站推荐为Highlight Article，挂在网站上供读者免费下载三个月。到目前为止，这篇文章已经被引用了 17 次。最近的一次引用，是被印度学者在JNN上引用我们关于碳化硅纳米线中孪晶形成的原因。 当我从SCI上看到这篇文章引用我们工作的时候,就给作者发了个Email,询问能否给发个reprint。几天过去了,没有收到任何回音,我觉得可能人家不愿理我。没想到,快一周的时候,作者给我发来了该文章。我打开一看,原来作者从杂志上将那篇文章扫描下来,转换成PDF格式后发给我的。我很受感动,赶紧给作者回信,感谢他的hard work for making the PDF file。但同时,又觉得读那样的PDF文件,很不舒服,就让我在国外的学生把那篇文章重新下载了。最后,我把学生下载的PDF文件发给原作者,他当然也千恩万谢了。 （1）印度学者论文 （2）引用我们工作的内容
今天上班一打开邮箱，就发现有一封来自Nanotechnology的邮件，原来是告诉我们关于碳化硅孪晶纳米线的论文被下载了250次。 Dear Prof Guo, I am pleased to tell you that your article, Periodically twinned SiC nanowires, in Nanotechnology, Vol 19, pp215602 (2008), has been downloaded 250 times so far. To put this into context, across all IOP journals 10% of articles were accessed over 250 times this quarter. ... ... 该论文是我们和UCLA的杜经宁教授（中央研究院院士）以及他的博士生徐迪合作完成的。我们组论文的引用率(SCI他引)都不高，最多的才30次，希望这篇文章在引用率上能有突破。
我们组关于周期性孪晶碳化硅纳米线(内容见博文: 周期性孪晶结构的碳化硅纳米线 )的文章在Nanotechnology发表后不久，就收到杂志编辑的email，说要在Nanotechweb.org上的Lab Talk栏目加以介绍，希望我给他们写个story。 虽然是个短文，但要写得简单明了，让大家都能明白还真不容易。想了一个星期，动手写了一天，再经过我们的合作者加州大学洛杉矶分校杜经宁教授的润色，总算完成了一件任务。今天编辑告诉我已经上传到Nanotechweb.org上了，网址为： http://nanotechweb.org/cws/article/lab/34422 。 Nanotechweb.org提供该论文免费下载3个月。 下面就是从 Nanotechweb.org 上复制下来的 那篇短文： Periodically twinned SiC nanowires used as reinforcement for nano-composite materials In composite materials, particles or fibers are added to a matrix to improve the properties. They are called particle- or fiber-reinforced composites. One well-known example is reinforced concrete, made by embedding steel rods or mesh into the fresh and uncured concrete. The reinforcement renders the hardened concrete structure capable of supporting greater tensile, compressive and shear stresses. The adhesive bond between the steel and the concrete is important. The adhesion can be enhanced by the incorporation of contours into the surface of the steel members. In developing nano-composite materials, nanotubes and nanowires are expected to greatly improve the properties of the composites. Silicon carbide nanowires have been regarded as an excellent reinforcement for composites due to the high intrinsic strength of the materials. However, the silicon carbide nanowires have a smooth surface and are easily pulled out when the composites break because of the weak adhesion between the nanowires and the matrix. Therefore, we need to fabricate a contoured surface of the silicon carbide nanowires in order to improve the adhesion. In a recent paper published in Nanotechnology , researchers from China and the US reported a new type of silicon carbide nanowires periodically twinned SiC nanowires, which have a contoured surface on the nanoscale. The nanowires with a hexagonal cross section, a diameter of 50300 nm and a length of tens to hundreds of micrometers feature a zigzag arrangement of periodically twinned segments with a uniform thickness along the entire growth length. Computer simulation demonstrates that the zigzag columnar structure is formed by the stacking of hexagonal discs of {111} planes of SiC. The authors proposed a minimum surface energy and strain energy argument to explain the formation of periodic twins in the SiC nanowires. The twinning structure has made the nanowires exhibit different luminescence and chemical stability. In another paper published in Nanotechnology (2006, 17 2870), the Chinese group showed that the silicon carbide naowires with beaded morphology can greatly enhance the tensile strength of an epoxy composite. Therefore, the new type of twinned SiC nanowires is expected to find important applications in nano-composites. (郭向云,2008年5月30日)
标签: 碳化硅
