Fiflis P, Christenson M P, Connolly N, Ruzic D N
Department of Nuclear, Plasma and Radiological Engineering, Center for Plasma Material Interactions, University Illinois at Urbana-Champaign, Urbana 61801, IL, USA.
Nanomaterials (Basel). 2015 Nov 25;5(4):2007-2018. doi: 10.3390/nano5042007.
Impingement of high fluxes of helium ions upon metals at elevated temperatures has given rise to the growth of nanostructured layers on the surface of several metals, such as tungsten and molybdenum. These nanostructured layers grow from the bulk material and have greatly increased surface area over that of a not nanostructured surface. They are also superior to deposited nanostructures due to a lack of worries over adhesion and differences in material properties. Several palladium samples of varying thickness were biased and exposed to a helium helicon plasma. The nanostructures were characterized as a function of the thickness of the palladium layer and of temperature. Bubbles of ~100 nm in diameter appear to be integral to the nanostructuring process. Nanostructured palladium is also shown to have better catalytic activity than not nanostructured palladium.
在高温下，高通量氦离子撞击金属已导致在几种金属（如钨和钼）表面生长出纳米结构层。这些纳米结构层从块状材料生长而来，与非纳米结构表面相比，其表面积大大增加。由于不存在对附着力和材料性能差异的担忧，它们也优于沉积的纳米结构。对几个不同厚度的钯样品施加偏压并使其暴露于氦螺旋波等离子体中。纳米结构被表征为钯层厚度和温度的函数。直径约100纳米的气泡似乎是纳米结构化过程不可或缺的一部分。纳米结构钯还显示出比非纳米结构钯具有更好的催化活性。
