| 查看: 194 | 回复: 0 | |||
| 当前主题已经存档。 | |||
[资源]
MATERIALS SCIENCE: Softening into Shape
|
|||
|
Polymer particles with nanometer and micrometer dimensions have been applied to fields ranging from medical imaging to fluid rheology, but controlling particle shape during synthesis has been challenging. Champion et al. have devised a simple method for manipulating spherical polystyrene particles into a diverse array of shapes and sizes (including the bicones shown left). The particles were embedded in a sheet of polyvinyl alcohol and then either softened (by solvent or heat) and stretched, or else softened after first stretching the film (which created voids filled by the softened particles). Dissolution of the film then afforded the shaped free particles. Stretching was possible in either one or two directions, and it was possible to combine or repeat the two techniques.-- MSL Proc. Nat. Acad. Sci. U.S.A. 104, 11901 (2007). [ Last edited by luo.henry on 2008-5-17 at 11:33 ] |
回复此楼» 猜你喜欢
今天系统多次维护，明天很可能放榜！
已经有5人回复
-
欢迎发来filecode的Mz6后的代码验证其规律
已经有74人回复
-
岩土工程学报什么时候才能终审完呐
已经有4人回复
-
时间戳又变了8-15
已经有25人回复
-
2027广东省杰青
已经有6人回复
-
快农历七夕节了，轻松一下，男人悄悄话，女施主请不要进来。
已经有3人回复
-
哪位老哥知道今年的国自然具体哪一天放榜？
已经有9人回复
-
咱们一起用铁证分析2026国家社科基金中标与否
已经有26人回复
-
我的国基提前知道中了，可是同事的操作让我实在接受不了，怎么会有这样的人
已经有16人回复
-
有时候，自然基金真的不能太认真 （我的申报经验）
已经有12人回复
25