【作者】 冯石； 刘俊扬； 郑珏婷； 杨扬； 罗仲梓； 田中群；

【Author】 Shi Feng;Jun-Yang Liu;Jue-Ting Zheng;Yang Yang;Zhong-Zi Luo;Zhong-Qun Tian;State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University;

【机构】 固体表面物理化学国家重点实验室,化学化工学院厦门大学；

【摘要】 通过机械可控裂结法(Mechanically Controllable Break Junction,MCBJ),在微芯片上构筑并精确控制金属电极对的纳米间隔,适当长度的分子可在纳米间隔中自组装形成稳定的金属/分子/金属结,应用于分子电子学的研究,结合导电纳米线或功能分子可设计超大规模集成电路的电学元件,还可设计门电极控制元件电学性能[1]。本工作致力于改善微芯片的制作难题,在弹簧钢基底上设计和制备MCBJ适用的微芯片,该基底相比常用的硅基底具有不易碎裂、弹性好等优势,利用普通光刻结合电子束光刻技术制备悬空的纳米电极对,实现马达长达600μm的步进,考虑3-5×10-5衰减系数,能够精确控制电极对纳米间隔在宽范围10-10至10-8数量级的改变,进而匹配较长长度如DNA等分子。结合本小组自行设计和搭建的超高真空/低温联用系统,可实现机械可控裂结法和表面增强拉曼光谱联用对分子结构型和单分子电学性质的原位研究[2]。更多还原

【Abstract】 The study of precise controllable nanogap is significant and essential in Molecular Electronics. Molecular Junctions Mechanically Controllable Break Junction(MCBJ) is a useful method to fabricate stable nanogap electrodes. Recently, we developed a nano-fabrication on spring steel substrate to fabricate MCBJ chips. Compared with the original fragile silicon substrate, the spring steel can sustain much more press by the stepping motor without chip fracture, which makes longer nanogap controlled. Combine with our home-built MCBJ setup and self-designed cryogenic Ultra-High Vacuum(Cryogenic-UHV) Spectroscopic combined System, the electronic and spectroscopic characterization such as Raman can be obtained simultaneously.更多还原