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【大学】Liquid Marbles 【五秒钟文献阅读系列】 你有没有在满是尘土的地面上洒过水? 水滴沾满了尘土而形成的小球可以在地上滚上很远并且相当稳定,而这一现象最早曾在约两千年前在老普林尼的《自然史》中得以描述[1]。这种由沾满了疏水液滴所形成的小球被称为是“liquid marble“。该种小球并不会浸湿该液滴本可浸润的表面、小球间的碰撞也不会导致融合、甚至可以在水面上漂浮一定的时间,而用棒或者是手指则可以轻易地将其一分为二。Figure 1. (a) Water marble on a solid (side view), or (b) on a water pool (top view).Figure 2. Projection of a liquid marble on another one; 4 ms separate each image.Figure 3. Division of a millimetric water marble; 4 ms separate each image. Liquid Marbles的概念最早报道于1968年的一份专利之中[2]。实际上,制备这种小液滴的方法非常之简单——把液滴放置在铺有一层疏水的微球的表面上,再使液滴滚动,沾上细颗粒即可。 如某文章[3]的Supplementary Information: Typically, 15 μL glucose (or gluconolactone) solution was first placed on a bed of silica particles, then 15 μL diamminesilver(I) solution was injected into the droplets, after rolling, normal liquid marbles were prepared. 目前有不少关于这个的报道……比如说将其作为微反应器、做污染检测、气体检测啥的…… 有兴趣的看看文献[3]的引用吧。 总之很好玩不是吗? [1] Aussillous, P., & Quéré, D. (2006). Properties of liquid marbles. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Science,462(2067), 973-999. [2] S. Dieter, S. Franz-Theo, B. Helmut (Degussa), US3393155A, 1968. [3] Sheng, Y., Sun, G., Wu, J., Ma, G., & Ngai, T. (2015). Silica-Based Liquid Marbles as Microreactors for the Silver Mirror Reaction. Angewandte Chemie.
Science art inspired by a molecular muse 国外某个从科研转行到艺术去的一个人做的结构式饰品。 http://tieba.baidu.com/mo/q/checkurl?url=http%3A%2F%2Fwww.etsy.com%2Fshop%2Fmolecularmuse%3Fpage%3D1%23&urlrefer=8d4c8200bdecb85c0c4698aa747f264e 。。。这不是广告。。。 血清素项链-寓意快乐 serotonin molecule necklace - for happinessAlmost half a decade ago, I was a scientist. While reading a book about the science of mood and emotion, I noticed that serotonin, in addition to being the molecule that makes us feel happy, has a very pretty shape. I thought it would make a beautiful necklace that would serve as a kind of talisman for happiness. After a Google search yielded no serotonin necklaces, I learned to make jewelry so that I could have one. Now, I am a full-time cobbler of silver molecules (and am much happier!). Funny the turns life gives us! Serotonin is the neurotransmitter molecule that induces feelings of happiness, satisfaction, and relaxation. SSRI medications, such as Prozac, work by increasing levels of serotonin. Of my whole molecule jewelry collection, the serotonin necklace is still my favorite. Based on the molecular shape of serotonin, it has a elegant, modern shape and symbolizes the contented feeling of happiness so lacking in our modern, fractured, frenzied lives. It is both a meaningful personal symbol for happiness and a thoughtful gift for someone you wish happiness. The pendant is made of sterling silver, is 1.5 inches wide, and is attached to a sterling silver snake chain that can be adjusted for length between 16 to 18 inches. It closes with a lobster clasp. Each is loving made, packaged in a recycled gift box, and includes an informational tag about serotonin.
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