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Free-Standing 2D Janus Gold Nanoparticles Monolayer Film with Tunable Bifacial Morphologies via the Asymmetric Growth at Air-Liquid Interface.
Langmuir ( IF 3.7 ) Pub Date : 2019-11-14 , DOI: 10.1021/acs.langmuir.9b03189 Qian Cheng 1, 2 , Liping Song 1, 2 , Han Lin 1 , Yanping Yang 1 , Youju Huang 1, 2, 3 , Fengmei Su 4 , Tao Chen 1, 2
Langmuir ( IF 3.7 ) Pub Date : 2019-11-14 , DOI: 10.1021/acs.langmuir.9b03189 Qian Cheng 1, 2 , Liping Song 1, 2 , Han Lin 1 , Yanping Yang 1 , Youju Huang 1, 2, 3 , Fengmei Su 4 , Tao Chen 1, 2
Affiliation
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Large scaled two-dimensional free-standing monolayer films of gold nanoparticles show distinctive optical, electrical, and chem-physical propertie making them a new class of advanced plasmonic materials differing from bulk materials and individual nanoparticles in solution. The conventional 2D gold nanoparticle films usually possess symmetric structures and identical properties of gold nanoparticles on both sides. Herein, we developed an easy and efficient approach to construct a new type of free-standing 2D gold nanoparticle monolayer film with asymmetric gold nanoparticle structures and functions, called a 2D Janus gold nanoparticle film. The remarkable feature of our method is the subsequent asymmetric growth on one side of the interfacial self-assembled gold nanoparticle monolayer film at the air-liquid interface. It is very easy to control the morphology of the Janus film by simply and precisely adjusting the size and shape of the gold nanoparticles on the top side, and selectively tuning the structure and composition on the bottom side of the film by growing gold nanoparticles or other noble metals such as Ag, Pt, and Pd. Unlike the conventionally prepared Janus films at solid substrate that require long-time etching and transfer procedures, other features of our method include the short time in which the interfacial self-assembly and the subsequent asymmetric growth are completed as well as the easily transferable property of the Janus film onto different substrates, such as quartz glass sheets, silicon wafers, and PDMS. The obtained Janus gold nanoparticle film shows asymmetric wettabilities, optical properties, and surface-enhanced Raman scattering (SERS) effects, which is promising for a range of potential applications in optical devices, sensors, and asymmetric catalysis.
中文翻译：
通过在气液界面处的不对称生长，具有可调整的双面形态的自由站立式2D Janus金纳米粒子单层膜。
金纳米粒子的大型二维独立式单层膜显示出独特的光学，电学和化学物理特性，使其成为不同于本体材料和溶液中单个纳米粒子的一类新型高级等离激元材料。常规的二维金纳米粒子膜通常在两侧都具有对称的结构和金纳米粒子的相同特性。本文中，我们开发了一种简便有效的方法来构建一种新型的具有不对称金纳米颗粒结构和功能的独立式2D金纳米颗粒单层膜，称为2D Janus金纳米颗粒膜。我们方法的显着特征是随后在气液界面上界面自组装金纳米粒子单层膜的一侧不对称生长。通过简单而精确地调整顶侧金纳米颗粒的大小和形状，并通过生长金纳米颗粒或其他方法有选择地调整膜底侧的结构和组成，很容易控制Janus膜的形态贵金属，例如Ag，Pt和Pd。与传统的固体基板上需要长时间蚀刻和转移程序的Janus薄膜不同，我们方法的其他特点包括界面完成自组装和随后的不对称生长的时间很短，以及膜的易转移特性。将Janus膜粘贴到不同的基材上，例如石英玻璃板，硅片和PDMS。所得的Janus金纳米颗粒薄膜显示不对称的润湿性，光学性能，
更新日期：2019-11-14
中文翻译：
通过在气液界面处的不对称生长，具有可调整的双面形态的自由站立式2D Janus金纳米粒子单层膜。
金纳米粒子的大型二维独立式单层膜显示出独特的光学，电学和化学物理特性，使其成为不同于本体材料和溶液中单个纳米粒子的一类新型高级等离激元材料。常规的二维金纳米粒子膜通常在两侧都具有对称的结构和金纳米粒子的相同特性。本文中，我们开发了一种简便有效的方法来构建一种新型的具有不对称金纳米颗粒结构和功能的独立式2D金纳米颗粒单层膜，称为2D Janus金纳米颗粒膜。我们方法的显着特征是随后在气液界面上界面自组装金纳米粒子单层膜的一侧不对称生长。通过简单而精确地调整顶侧金纳米颗粒的大小和形状，并通过生长金纳米颗粒或其他方法有选择地调整膜底侧的结构和组成，很容易控制Janus膜的形态贵金属，例如Ag，Pt和Pd。与传统的固体基板上需要长时间蚀刻和转移程序的Janus薄膜不同，我们方法的其他特点包括界面完成自组装和随后的不对称生长的时间很短，以及膜的易转移特性。将Janus膜粘贴到不同的基材上，例如石英玻璃板，硅片和PDMS。所得的Janus金纳米颗粒薄膜显示不对称的润湿性，光学性能，
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