分子磁体与电极的精准结合

发展了基于石墨烯电极的室温稳定单分子器件的高效制备方法；用反馈控制电致迁移技术在金电极上制备了纳米间隙，通过S-Au键合方法构筑了基于单分子磁体Mn6的分子器件；基于机械可控断裂结技术制备了若干单分子器件，以此为基础实现了同分异构体的识别、多通道单分子器件中的量子干涉效应调控、双氮原子掺杂诱导的量子干涉态的转换、对称性对电输运量子干涉的调控，阐明了螺共轭效应、分子长度和锚定位置对单分子电导衰减系数的影响，并采用单分子电导研究了两步串联反应的反应机制；通过界面工程控制单分子晶体管中的单极双极传输。该数据集按照器件构筑的方法，细分为三个子数据集细分为个子数据集，分别为：2017YFA0204903-002-001-基于单分子磁体Mn6的分子器件子数据集、2017YFA0204903-002-002-基于石墨烯电极的室温稳定单分子器件的高效制备子数据集、2017YFA0204903-002-003-基于机械可控断裂结技术单分子器件构筑及性能表征子数据集。

An efficient fabrication method for room-temperature stable single-molecule devices based on graphene electrodes was developed. Nanogaps were prepared on gold electrodes via feedback-controlled electro-migration technology, and molecular devices based on single-molecule magnet Mn6 were constructed through S-Au bonding. Several single-molecule devices were fabricated using the mechanically controllable break junction (MCBJ) technique. Based on these devices, the identification of isomers, regulation of quantum interference effects in multi-channel single-molecule devices, transition of quantum interference states induced by dual-nitrogen atom doping, and regulation of quantum interference in electronic transport by molecular symmetry were achieved. The impacts of spiroconjugation effect, molecular length and anchoring position on the single-molecule conductance decay coefficient were elucidated, and the reaction mechanism of two-step tandem reactions was investigated via single-molecule conductance measurements. Unipolar-to-bipolar transport in single-molecule transistors was controlled through interface engineering. This dataset is categorized into three sub-datasets based on device fabrication methods, which are: 1) 2017YFA0204903-002-001 - Sub-dataset of molecular devices based on single-molecule magnet Mn6; 2) 2017YFA0204903-002-002 - Sub-dataset of efficient fabrication method for room-temperature stable single-molecule devices based on graphene electrodes; 3) 2017YFA0204903-002-003 - Sub-dataset of single-molecule device fabrication and performance characterization based on mechanically controllable break junction technique.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于分子磁体与电极的精准结合技术，涵盖了基于石墨烯电极的室温稳定单分子器件高效制备、基于单分子磁体Mn6的分子器件构筑，以及利用机械可控断裂结技术实现的单分子器件性能研究。数据集进一步探讨了量子干涉效应调控、同分异构体识别等关键科学问题，并细分为三个子数据集以系统组织相关内容。