水可帮助生物纤维集获取阳光
文章来源:未知 文章作者:enread 发布时间:2017-03-23 08:50 字体: [ ]  进入论坛
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When it comes to water, some materials have a split personality - and some of these materials could hold the key to new ways of harnessing solar energy. These small assemblies of organic molecules1 have parts that are hydrophobic, or water-fearing, while other parts are hydrophilic, or water-loving. Because of their schizoid nature, micelles organize themselves into spheres that have their hydrophilic parts turned out while their hydrophobic parts are shielded inside.
 
A new study from the U.S. Department of Energy's (DOE's) Argonne National Laboratory has shown water can serve another previously2 undiscovered role as these micelles coalesce3 to spontaneously form long fibers5.
 
In a study led by Argonne nanoscientist Subramanian Sankaranarayanan and chemist Christopher Fry, both of Argonne's Center for Nanoscale Materials, supercomputer simulations and as well as lab-based experiments showed that water serves as an invisible cage for the growth of the micelle fiber4.
 
The study could help scientists to understand how light-harvesting molecules are incorporated into the micelle fiber as it assembles, which would be a key step to understanding some forms of artificial photosynthesis6.
 
"Until now, trying to understand where the light-harvesting molecules bind7 has been like trying to see how a square peg8 can fit in a round hole," said Sankaranarayanan. "By seeing the way in which the micelle fiber self-assembles, we can get a better understanding of how these kinds of light-harvesting systems are formed."


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1 molecules 187c25e49d45ad10b2f266c1fa7a8d49     
分子( molecule的名词复数 )
参考例句:
  • The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
  • Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里,大分子裂变为小分子。
2 previously bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
3 coalesce oWhyj     
v.联合,结合,合并
参考例句:
  • And these rings of gas would then eventually coalesce and form the planets.这些气体环最后终于凝结形成行星。
  • They will probably collide again and again until they coalesce.他们可能会一次又一次地发生碰撞,直到他们合并。
4 fiber NzAye     
n.纤维,纤维质
参考例句:
  • The basic structural unit of yarn is the fiber.纤维是纱的基本结构单元。
  • The material must be free of fiber clumps.这种材料必须无纤维块。
5 fibers 421d63991f1d1fc8826d6e71d5e15f53     
光纤( fiber的名词复数 ); (织物的)质地; 纤维,纤维物质
参考例句:
  • Thesolution of collagen-PVA was wet spined with the sodium sulfate as coagulant and collagen-PVA composite fibers were prepared. 在此基础上,以硫酸钠为凝固剂,对胶原-PVA共混溶液进行湿法纺丝,制备了胶原-PVA复合纤维。
  • Sympathetic fibers are distributed to all regions of the heart. 交感神经纤维分布于心脏的所有部分。
6 photosynthesis A2Czp     
n.光合作用
参考例句:
  • In apple trees photosynthesis occurs almost exclusively in the leaves.苹果树的光合作用几乎只发生在叶内。
  • Chloroplasts are the structures in which photosynthesis happens.叶绿体就是光合作用发生的地方。
7 bind Vt8zi     
vt.捆,包扎;装订;约束;使凝固;vi.变硬
参考例句:
  • I will let the waiter bind up the parcel for you.我让服务生帮你把包裹包起来。
  • He wants a shirt that does not bind him.他要一件不使他觉得过紧的衬衫。
8 peg p3Fzi     
n.木栓,木钉;vt.用木钉钉,用短桩固定
参考例句:
  • Hang your overcoat on the peg in the hall.把你的大衣挂在门厅的挂衣钩上。
  • He hit the peg mightily on the top with a mallet.他用木槌猛敲木栓顶。
TAG标签: water energy molecules
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