Stroyuk O, Raevskaya A, Grodzyuk G, Andriushina N, Skoryk M, Yefanov V, Schulze S, Zahn D R T
L. V. Pysarzhevsky Institute of Physical Chemistry, Nat. Acad. of Sci. of Ukraine 03028 Kyiv Ukraine.
Semiconductor Physics, Chemnitz University of Technology 09107 Chemnitz Germany
RSC Adv. 2019 Jan 2;9(1):444-449. doi: 10.1039/c8ra09454c. eCollection 2018 Dec 19.
The introduction of colloidal single-layer carbon nitride (SLCN) nanosheets at the stage of the formation of Au nanocrystals (NCs) in aqueous solutions allows the surface plasmon resonance peak position of gold/SLCN composites to be tuned in a relatively broad range of 520-610 nm. The effect is believed to originate from a strong electronic interaction between Au NCs and SLCN nanosheets attached to their surface as capping ligands and resulting in a decrease of the effective electron density on the Au NC surface. The SLCN nanosheets suppress direct interparticle interactions between Au NCs prohibiting additional plasmonic features typical for the Au NC associates. Species similar to SLCN in terms of functionalities but having no conjugated aromatic system, such as polyethyleneimine, only induce aggregation of Au NCs but do not allow the main surface plasmon resonance of the NCs to be tuned demonstrating the crucial role of electronic interaction between the NC surface and the aromatic SLCN sheets for the surface plasmon resonance tuning.
在水溶液中形成金纳米晶体（NCs）的阶段引入胶体单层氮化碳（SLCN）纳米片，可以使金/SLCN复合材料的表面等离子体共振峰位置在520-610nm的较宽范围内进行调节。据信，这种效应源于金纳米晶体与作为封端配体附着在其表面的SLCN纳米片之间的强电子相互作用，导致金纳米晶体表面有效电子密度降低。SLCN纳米片抑制了金纳米晶体之间的直接粒子间相互作用，阻止了金纳米晶体聚集体典型的额外等离子体特征。在功能方面与SLCN相似但没有共轭芳香体系的物质，如聚乙烯亚胺，只会诱导金纳米晶体聚集，但不能调节纳米晶体的主要表面等离子体共振，这表明纳米晶体表面与芳香族SLCN片之间的电子相互作用对于表面等离子体共振调节起着关键作用。
