Single-step Preparation of Two-dimensionally Organized Gold Particles via Ionic Liquid/Metal Sputter Deposition
Single-step Preparation of Two-dimensionally Organized Gold Particles via Ionic Liquid/Metal Sputter Deposition
复制标题
离子液体/金属溅射沉积一步制备二维组织金颗粒
DOI：
10.1039/c5cp01602a
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
T. Torimoto
中科院分区：
文献类型：
--
作者：
D. Sugioka;T. Kameyama;S. Kuwabata; T. Torimoto
在室温离子液体(RTIL)上溅射贵金属，如Au、Ag、Pd和Pt，只有在含有羟基功能化阳离子的室温离子液体(RTIL)上才能在液体表面形成由球形贵金属纳米颗粒组成的单层薄膜。当使用含非官能化阳离子的纯RTIL时，在相同条件下溅射沉积这些金属只会产生分散良好的金属颗粒，而不会在溶液表面形成任何薄膜。阴离子物种，即使是那些含有羟基的物种，也不会显著影响RTIL表面颗粒膜的形成或颗粒在溶液中的分散。Au颗粒的大小可以通过改变溅射条件来控制，而与二维颗粒密度无关，这是由所使用的RTIL的组成决定的。利用水平提升法，即使在表面高度弯曲的情况下，RTIL表面的Au单层薄膜也可以很容易地转移到各种固体衬底上，而不会发生大的聚集。
Sputtering of noble metals, such as Au, Ag, Pd, and Pt, onto room-temperature ionic liquids (RTILs) enabled the formation of monoparticle films composed of spherical noble metal nanoparticles on the liquid surface only when the RTILs used contained hydroxyl-functionalized cations as a component. Sputter deposition of these metals under the same conditions simply produced well-dispersed metal particles without the formation of any films on the solution surface when pure RTILs with non-functionalized cations were employed. Anionic species, even those containing a hydroxyl group, did not significantly affect the formation of the particle film on the RTIL surface or dispersion of particles in the solution. The size of Au particles could be controlled by varying the sputtering condition regardless of the two-dimensional particle density, which was determined by the composition of RTILs used. An Au monoparticle film on the RTIL surface was easily transferred onto various solid substrates via the horizontal liftoff method without large aggregation even when the substrate surface was highly curved.