He Zhen, Su Jie, Wang Yu-Tao, Wang Kang, Wang Jin-Long, Li Yi, Wang Rui, Chen Qing-Xia, Jiang Hui-Jun, Hou Zhong-Huai, Liu Jian-Wei, Yu Shu-Hong
Shenzhen Key Laboratory of Sustainable Biomimetic Materials, Department of Materials Science and Engineering, Institute of Innovative Materials, Southern University of Science and Technology Guangming Advanced Research Institute, Southern University of Science and Technology, Shenzhen 518055, China.
New Cornerstone Science Laboratory, Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, Institute of Biomimetic Materials & Chemistry, Anhui Engineering Laboratory of Biomimetic Materials, University of Science and Technology of China, Hefei 230026, China.
J Am Chem Soc. 2024 Jul 24;146(29):19998-20008. doi: 10.1021/jacs.4c03730. Epub 2024 Jun 12.
As the dimensionality of materials generally affects their characteristics, thin films composed of low-dimensional nanomaterials, such as nanowires (NWs) or nanoplates, are of great importance in modern engineering. Among various bottom-up film fabrication strategies, interfacial assembly of nanoscale building blocks holds great promise in constructing large-scale aligned thin films, leading to emergent or enhanced collective properties compared to individual building blocks. As for 1D nanostructures, the interfacial self-assembly causes the morphology orientation, effectively achieving anisotropic electrical, thermal, and optical conduction. However, issues such as defects between each nanoscale building block, crystal orientation, and homogeneity constrain the application of ordered films. The precise control of transdimensional synthesis and the formation mechanism from 1D to 2D are rarely reported. To meet this gap, we introduce an interfacial-assembly-induced interfacial synthesis strategy and successfully synthesize quasi-2D nanofilms the oriented attachment of 1D NWs on the liquid interface. Theoretical sampling and simulation show that NWs on the liquid interface maintain their lowest interaction energy for the ordered crystal plane (110) orientation and then rearrange and attach to the quasi-2D nanofilm. This quasi-2D nanofilm shows enhanced electric conductivity and unique optical properties compared with its corresponding 1D geometry materials. Uncovering these growth pathways of the 1D-to-2D transition provides opportunities for future material design and synthesis at the interface.
由于材料的维度通常会影响其特性，由低维纳米材料（如纳米线（NWs）或纳米片）组成的薄膜在现代工程中具有重要意义。在各种自下而上的薄膜制造策略中，纳米级构建块的界面组装在构建大规模排列的薄膜方面具有很大的潜力，与单个构建块相比，可产生或增强集体特性。对于一维纳米结构，界面自组装导致形态取向，有效地实现各向异性的电、热和光传导。然而，每个纳米级构建块之间的缺陷、晶体取向和均匀性等问题限制了有序薄膜的应用。跨维度合成的精确控制以及从一维到二维的形成机制鲜有报道。为了弥补这一差距，我们引入了一种界面组装诱导的界面合成策略，并成功地合成了准二维纳米薄膜——一维纳米线在液体界面上的定向附着。理论采样和模拟表明，液体界面上的纳米线对于有序晶面（110）取向保持其最低相互作用能，然后重新排列并附着到准二维纳米薄膜上。与相应的一维几何材料相比，这种准二维纳米薄膜表现出增强的电导率和独特的光学性质。揭示这些从一维到二维转变的生长途径为未来界面处的材料设计和合成提供了机会。
