Two-dimensional self-assembly and co-assembly of two tetracarboxylic acid derivatives investigated by STM

Xuan Peng; Linlin Gan; Wenchao Zhai; Xiaoling Chen; Ke Deng; Wubiao Duan; Wei Li; Qingdao Zeng

doi:10.1039/d3na00389b

Two-dimensional self-assembly and co-assembly of two tetracarboxylic acid derivatives investigated by STM

Nanoscale Adv. 2023 Aug 3;5(18):4752-4757. doi: 10.1039/d3na00389b. eCollection 2023 Sep 12.

Authors

Xuan Peng^{1

2}, Linlin Gan^{1

3}, Wenchao Zhai², Xiaoling Chen², Ke Deng¹, Wubiao Duan³, Wei Li², Qingdao Zeng^{1

4}

Affiliations

¹ CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST) Beijing 100190 China kdeng@nanoctr.cn zengqd@nanoctr.cn.
² School of Science, Nanchang Institute of Technology Nanchang 330099 China liweidting@nit.edu.cn.
³ Department of Chemistry, School of Science, Beijing Jiaotong University Beijing 100044 China wbduan@bjtu.edu.cn.
⁴ Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences Beijing 100049 China.

Abstract

In this work, the two-dimensional self-assembly and co-assembly behaviors of two tetracarboxylic acid derivatives (H₄BDETP and H₄BTB) were investigated by scanning tunneling microscopy (STM). H₄BDETP molecules self-assembled into linear nanostructures, and H₄BTB molecules formed lamellar and tetragonal nanostructures. The formation of a H₄BDETP/H₄BTB co-assembly nanostructure was closely related to the deposition sequence of H₄BDETP and H₄BTB on highly oriented pyrolytic graphite (HOPG). The introduction of H₄BTB into the self-assembly system of H₄BDETP resulted in the emergence of the H₄BDETP/H₄BTB nanostructure, while the addition of H₄BDETP had no effect on the self-assembly system of H₄BTB and a H₄BDETP/H₄BTB co-assembly nanostructure was not obtained.