| 查看: 445 | 回复: 2 | |||
| 当前主题已经存档。 | |||
hslining木虫 (正式写手)
|
[交流]
2009年Nature上关于非晶微成形文章
|
||
|
Nanomoulding with amorphous metals Abstract Nanoimprinting promises low-cost fabrication of micro- and nano-devices by embossing features from a hard mould onto thermoplastic materials, typically polymers with low glass transition temperature. The success and proliferation of such methods critically rely on the manufacturing of robust and durable master moulds. Silicon-based moulds are brittle and have limited longevity. Metal moulds are stronger than semiconductors, but patterning of metals on the nanometre scale is limited by their finite grain size. Amorphous metals (metallic glasses) exhibit superior mechanical properties and are intrinsically free from grain size limitations. Here we demonstrate direct nanopatterning of metallic glasses by hot embossing, generating feature sizes as small as 13 nm. After subsequently crystallizing the as-formed metallic glass mould, we show that another amorphous sample of the same alloy can be formed on the crystallized mould. In addition, metallic glass replicas can also be used as moulds for polymers or other metallic glasses with lower softening temperatures. Using this 'spawning' process, we can massively replicate patterned surfaces through direct moulding without using conventional lithography. We anticipate that our findings will catalyse the development of micro- and nanoscale metallic glass applications that capitalize on the outstanding mechanical properties, microstructural homogeneity and isotropy, and ease of thermoplastic forming exhibited by these materials. http://www.nature.com/nature/journal/v457/n7231/full/nature07718.html [ Last edited by hslining on 2009-9-10 at 15:15 ] |
回复此楼» 猜你喜欢
有没有人能给点建议
已经有4人回复
-
假如你的研究生提出不合理要求
已经有12人回复
-
实验室接单子
已经有7人回复
-
全日制（定向）博士
已经有5人回复
-
萌生出自己或许不适合搞科研的想法，现在跑or等等看？
已经有4人回复
-
Materials Today Chemistry审稿周期
已经有4人回复
-
参与限项
已经有3人回复
-
对氯苯硼酸纯化
已经有3人回复
-
所感
已经有4人回复
-
要不要辞职读博？
已经有7人回复
 |
2楼2009-03-04 17:03:10
butterfly_003
禁虫 (小有名气)
|
本帖内容被屏蔽 |
3楼2009-03-19 13:54:29