Surface-Enhanced Raman Scattering Stimulated by Strong Metal–Molecule Interactions in a C60 Single-Molecule Junction,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Surface-Enhanced Raman Scattering Stimulated by Strong Metal–Molecule Interactions in a C60 Single-Molecule Junction
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-10-25 , DOI: 10.1021/acsami.1c09965
Koji Yasuraoka ₁ , Satoshi Kaneko _{1,

2} , Shuji Kobayashi ₁ , Kazuhito Tsukagoshi ₃ , Tomoaki Nishino ₁

Affiliation

Specifying the geometric and electronic structures of a metal–molecule interface at the single-molecule level is crucial for the improvement of organic electronics. A single-molecule junction (SMJ) can be used to investigate interfaces because it can be regarded as an elementary unit of the interface structure. Although considerable efforts have been made to this end, the detection of structural changes in SMJs associated with metal–molecule interactions remains challenging. In this study, we detected the surface-enhanced Raman scattering (SERS) signal originating from the metal–molecule interaction change induced by a local structural change in a C₆₀ SMJ. This junction has attracted wide attention owing to its unique electronic and vibronic properties. We fabricated a C₆₀ SMJ using a lithographically fabricated Au electrode and measured the SERS spectra along with the current–voltage (I–V) response. By continuous measurement of SERS for the C₆₀ SMJ, we obtained SERS spectra dependent on the local structural change. The analysis of the I–V response revealed that the vibration energy shift originates from the change in the local structure for different Au–C₆₀ interactions. Based on the discrimination of the states in accordance with the Au–C₆₀ interaction, we found that the probability of SERS for geometry with a large Au–C₆₀ interaction was enhanced.

中文翻译：

C60 单分子结中强金属-分子相互作用激发的表面增强拉曼散射

在单分子水平上指定金属-分子界面的几何和电子结构对于改进有机电子学至关重要。单分子结 (SMJ) 可用于研究界面，因为它可以被视为界面结构的基本单元。尽管为此做出了相当大的努力，但检测与金属-分子相互作用相关的 SMJ 结构变化仍然具有挑战性。在这项研究中，我们检测到源自 C ₆₀ SMJ局部结构变化引起的金属-分子相互作用变化的表面增强拉曼散射 (SERS) 信号。由于其独特的电子和振动特性，该结引起了广泛关注。我们制造了一个 C ₆₀SMJ 使用光刻制造的 Au 电极并测量 SERS 光谱以及电流 - 电压（I - V）响应。通过连续测量 C ₆₀ SMJ 的 SERS，我们获得了取决于局部结构变化的 SERS 光谱。对I - V响应的分析表明，振动能量转移源于不同 Au-C ₆₀相互作用的局部结构变化。基于根据 Au-C ₆₀相互作用对状态的区分，我们发现具有大 Au-C ₆₀相互作用的几何形状的 SERS 概率得到提高。

更新日期：2021-11-03

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南