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arXiv 1611.03344cond-mat.mes-hall
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高通量压印一步法制备金属纳米结构

One-step fabrication of metal nanostructures by high-throughput imprinting

Ze Liu

摘要:

直接纳米压印提供了一种简单且高通量的路线,用于以高精度和低成本生产均匀的纳米颗粒。然而,由于晶粒尺寸效应的内在限制,将这种技术应用于晶体金属被认为是不可能的。在这里,我们展示了直接超塑性纳米压印(SPNI)的结晶金属远低于其熔化温度(Tm),生成有序的纳米线阵列的纵横比高达~2000。我们的调查复制金属分级纳米结构显示的压印功能的能力小到8纳米,远小于散装金属的晶粒尺寸。最令人惊讶的是,发现所制备的金属分级纳米结构具有完美的单晶结构。这些发现表明,低于Tm的晶体金属的纳米压印可能来自晶格扩散。SPNI作为一种一步法、高度可控的高通量制备方法,可以促进金属纳米结构在生物传感、诊断成像、催化、食品工业和环境保护等方面的应用。

英文摘要:

Direct nanoimprinting provides a simple and high-throughput route for producing uniform nanopatterns at great precision and at low costs. However, applying this technique to crystalline metals has been considered as impossible due to intrinsic limitation from grain size effect. Here we demonstrate direct superplastic nanoimprinting (SPNI) of crystalline metals well below their melting temperatures (Tm), generating ordered nanowire arrays with aspect ratio up to ~2000. Our investigations of replicating metal hierarchical nanostructures show the capability of imprinting features as small as 8 nm, far smaller than the grain size of bulk metals. Most surprisingly, the prepared metal hierarchical nanostructures were found possessing perfect monocrystalline structures. These findings indicate that nanoimprinting of crystalline metals below Tm might be from lattice diffusion. SPNI as a one-step and highly controlled high-throughput fabrication method, could facilitate the applications of metal nanostructures in bio-sensing, diagnostic imaging, catalysis, food industry and environmental conservation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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