中空磁性网分子在理论上可创造-凯发k8官网

中空磁性网分子在理论上可创造
文章来源:未知 文章作者:enread 发布时间:2013-08-01 07:01 字体: [ ] 
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virginia 1 university researchers have discovered, in theory, the possibility of creating large, hollow magnetic cage 3 that could one day be used in medicine as a drug delivery system to non-invasively treat tumors, and in other emerging technologies. approximately 25 years ago, scientists first made the discovery of c60 fullerene(富勒烯) -- better known as the buckminster fullerene -- a 2 composed of 60 carbon molecules that formed a hollow cage. due to its unique hollow cage structure the molecule offers serious 4 potential because it could hold other atoms or small molecules inside, and therefore, be used in applications such as drug delivery.
 
that potential has since spurred worldwide interest among scientists who have been searching for similar molecules. although some hollow cage structures have been found, none of them is magnetic. magnetic properties of the structure are of particular interest because a hollow magnetic structure carrying an 5 atom or molecule can be guided by an external magnetic field and may serve as an effective vehicle for targeted drug delivery.
 
in a new study, published online on july 22 in the journal of chemical physics, two vcu scientists employing state-of-the-art theoretical methods show that magnetic hollow cages larger than the original c60 fullerene that carry giant magnetic moments are possible. a magnetic moment refers to the measure of the magnetic strength of a cluster.
 
"the potential benefit of this finding is that it provides a route to the synthesis of 6 magnets with 7 magnetic moments," said co-lead 8 puru jena, ph.d., 9 professor of physics in the vcu college of humanities and sciences. jena 10 with menghao wu, ph.d., co-author of the paper and a postdoctoral scholar in the vcu department of physics.
 
"these molecules can be used for targeted non-invasive drug delivery. when assembled, the molecules can also form new high strength magnets for device application," jena said.
 
according to jena, the pair of vcu researchers demonstrated the magnetic moment of the molecule by focusing on hetero-atomic clusters consisting of transition metal atoms such as cobalt (co) and manganese (mn) and carbon (c) atoms. in particular, co12c6, mn12c6, and mn24c18 clusters consisting of 12 cobalt and six carbon atoms, 12 manganese and six carbon atoms, and 24 manganese and 18 carbon atoms, respectively, carry magnetic moments as large as 14, 38 and 70 bohr magnetons. in comparison, the magnetic moment of an iron (fe) atom in crystalline iron is 2.2 bohr magnetons.
 
according to jena, the team is still early in its discovery process.
 
"there is a long way to go. experiments first have to be carried out to prove the predictions of our theory," said jena.
 
"ways must be found to synthesize large quantities of these molecules and study their magnetic properties once they are assembled. finally, these molecules need to be functionalized by 11 desired atoms/molecules for practical applications."


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1 xxzyp     
n.共和国,联邦,共同体
参考例句:
  • he is the chairman of the commonwealth of artists.他是艺术家协会的主席。
  • most of the members of the commonwealth are nonwhite.英联邦的许多成员国不是白人国家。
2 y6tzn     
n.分子,克分子
参考例句:
  • a molecule of water is made up of two atoms of hygrogen and one atom of oxygen.一个水分子是由p妈?f婘??妈?成的。
  • this gives us the structural formula of the molecule.这种方式给出了分子的结构式。
3 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。
4 gqiwy     
adj.技术的;工艺的
参考例句:
  • a successful company must keep up with the pace of technological change.一家成功的公司必须得跟上技术变革的步伐。
  • today,the pace of life is increasing with technological advancements.当今, 随着科技进步,生活节奏不断增快。
5 lt9zts     
a.扎牢的
参考例句:
  • an operation to remove glass that was embedded in his leg 取出扎入他腿部玻璃的手术
  • he has embedded his name in the minds of millions of people. 他的名字铭刻在数百万人民心中。
6 me9xh     
adj.分子的;克分子的
参考例句:
  • the research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • for the pressure to become zero, molecular bombardment must cease.当压强趋近于零时,分子的碰撞就停止了。
7 sbwyj     
adj.异常的,庞大的
参考例句:
  • there has been a colossal waste of public money.一直存在巨大的公款浪费。
  • some of the tall buildings in that city are colossal.那座城市里的一些高层建筑很庞大。
8 zrqzo     
n.研究者,调查者,审查者
参考例句:
  • he was a special investigator for the fbi.他是联邦调查局的特别调查员。
  • the investigator was able to deduce the crime and find the criminal.调查者能够推出犯罪过程并锁定罪犯。
9 wu9z3v     
adj.卓越的,杰出的,著名的
参考例句:
  • elephants are distinguished from other animals by their long noses.大象以其长长的鼻子显示出与其他动物的不同。
  • a banquet was given in honor of the distinguished guests.宴会是为了向贵宾们致敬而举行的。
10 c49a4f9c170cb7c268fccb474f5f0d4f     
合作( collaborate的过去式和过去分词 ); 勾结叛国
参考例句:
  • we have collaborated on many projects over the years. 这些年来我们合作搞了许多项目。
  • we have collaborated closely with the university on this project. 我们与大学在这个专案上紧密合作。
11 91dcd46b7c7d960c321ddb6c8b0ce5d1     
把…嵌入,埋入( embed的现在分词 ); 植入; 埋置; 包埋
参考例句:
  • data embedding in scrambled digital video complete source code, has been tested. 数据嵌入在炒数字视频完整的源代码,已经过测试。
  • embedding large portions of c code in string literals is very awkward. 将大部分c 代码嵌入到字符串中是非常笨拙的。
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